tag:blogger.com,1999:blog-21808356304349139642024-03-18T22:06:49.055-07:00Soil Stabilization and Dust Control BlogCBR PLUS and GRAVELOCK provide soil stabilization and dust control for clay based, gravel roads.GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-2180835630434913964.post-14293499233668992552012-11-01T13:00:00.001-07:002012-11-01T13:03:40.737-07:00Rehabilitating a road in China, using non-traditional road equipment.<!--[if gte mso 9]><xml>
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<span style="font-family: Arial, Helvetica, sans-serif;">We recently rehabilitated a section of a haul road, in a sugar
cane plantation near Laibin in Guangxi Province, in Southern China. This haul road carries approximately up to thirty
to fifty, two axle, trucks ranging from 10 to 30 ton loads per day.<o:p></o:p></span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">The road was treated with CBR PLUS to improve its
performance in both wet and dry weather and most importantly to reduce
maintenance. Typically, when untreated, these roads have to be rebuilt once a year or at times even
more frequently. The area is also prone
to high rainfall with a monsoon season and during the sugar cane harvesting
season, there is rainfall almost daily.<o:p></o:p></span></div>
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<br /></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">The soil is reddish brown, silty clay, with 15% coarse
material content in the range of 2 to 10 mm sized particles. The rest of the soil is very fine grained and
contains some very fine-grained silt and clay.
The liquid limit 42.7, plastic limit 23.7, plastic index is 19%. Actual
clay content is 33%.<o:p></o:p></span></div>
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<br /></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">In view of the high axle loads and essentially a good sub
base, it was decided to scarify and treat to a depth of 20 cm. The dosage rate of the CBR PLUS was 0.008
liters per square meter. <o:p></o:p></span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">The first step was to clear and reshape the road with the drains being cleared and formed at the same time. Three hoes were used for this purpose. The hoes were then used to break up the surface of the road and break lumps to a depth of 20cm. Half the dosage amount of CBR PLUS was poured into the water tanker and sprayed onto the road surface. The layer was then scarified using a tractor and rotary hoe, which mixed the layer and broke down the larger lumps. The rest of the CBR PLUS/water mixture was then sprayed onto the surface and the layer was then scarified again.<o:p></o:p></span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"><span style="font-size: small;">Final shaping was done with a hoe and some hand labor. The layer was then compacted with a smooth drum roller compactor. </span>The road was then sprayed twice a day with a light application of water to cure.</span><br />
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<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5Z6p-BwuHESml0Xj-S_2niJpXAGouEkmltjfdCvZJVV9fIpgGNsMkGfhQrv8fNHrr28wCeYo2AcVkaRgGsbzPpIERfQ52yEqLwqq2dqjggo9J6Ho11Bc9Gryv4LhWL4999cG5bZtullfr/s1600/China_RoadRehab_1.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5Z6p-BwuHESml0Xj-S_2niJpXAGouEkmltjfdCvZJVV9fIpgGNsMkGfhQrv8fNHrr28wCeYo2AcVkaRgGsbzPpIERfQ52yEqLwqq2dqjggo9J6Ho11Bc9Gryv4LhWL4999cG5bZtullfr/s320/China_RoadRehab_1.png" width="320" /></a></div>
<div style="text-align: center;">
<span style="font-family: Arial, Helvetica, sans-serif;"> Road Before Treatment</span><br />
<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvA_mgYqNEI_OfF5nYJ6fdUOL43PHYXiHkU5xe4Lo8RPw0iemcdade3_5atqVprSgtV7xuYfO1kRe-mnm4HNkILqiMbMfVJnZ7uM4XD5Ug9rjOjXqZf_PUxVTbwr9hSirtxLp8kz75RTnZ/s1600/China_Roadrehab_8.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvA_mgYqNEI_OfF5nYJ6fdUOL43PHYXiHkU5xe4Lo8RPw0iemcdade3_5atqVprSgtV7xuYfO1kRe-mnm4HNkILqiMbMfVJnZ7uM4XD5Ug9rjOjXqZf_PUxVTbwr9hSirtxLp8kz75RTnZ/s320/China_Roadrehab_8.png" width="320" /></a></div>
<span style="font-family: Arial, Helvetica, sans-serif;">Clearing and Shaping</span></div>
<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span>
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<div class="separator" style="clear: both; text-align: center;">
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<span style="font-family: Arial, Helvetica, sans-serif; text-align: center;">Adding CBR Plus to Water in Tanker</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif; text-align: center;"><br /></span></div>
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<span style="font-family: Arial, Helvetica, sans-serif; text-align: center;">Spraying CBR Plus / Water mixture onto the road</span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGnn5jHhXE1tT5atVP91CSX7tjh2AQXYFevBVMhOO0ON7xkbLp2bfajukI3ieTRipAPvf-NX5_ZQEVB2THN-9lomcnqjPSDcH5Y1AUbgAWyBBJAdK1iscdTDraLXyAIoucDHjYbO1am6PS/s1600/China_RoadRehab_5.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGnn5jHhXE1tT5atVP91CSX7tjh2AQXYFevBVMhOO0ON7xkbLp2bfajukI3ieTRipAPvf-NX5_ZQEVB2THN-9lomcnqjPSDcH5Y1AUbgAWyBBJAdK1iscdTDraLXyAIoucDHjYbO1am6PS/s320/China_RoadRehab_5.png" width="320" /></a></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"> Final Shaping</span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPBc_KzEb6FZ_Jrj3nWIsdd8QOf8zsVWyv1x8KFxaW4H_oCwlI_jikAhxOcAdck7crsoBrtQjm6Hdg0yNiEzWEGkO-x3rkZPSpvsBMh7-T6sfy2DCU0dMP2OE9M3r1EwTranKpHfenqjnE/s1600/China_RoadRehab_6.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="229" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiPBc_KzEb6FZ_Jrj3nWIsdd8QOf8zsVWyv1x8KFxaW4H_oCwlI_jikAhxOcAdck7crsoBrtQjm6Hdg0yNiEzWEGkO-x3rkZPSpvsBMh7-T6sfy2DCU0dMP2OE9M3r1EwTranKpHfenqjnE/s320/China_RoadRehab_6.png" width="320" /></a></div>
<div style="text-align: center;">
<span style="font-family: Arial, Helvetica, sans-serif;">Compacting</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">Completed road</span><o:p></o:p></div>
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<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial, Helvetica, sans-serif;">By: Reinhold Rohrs</span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial, Helvetica, sans-serif;">President of Rhide Technologies Inc.</span></div>
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<span style="font-family: Arial, Helvetica, sans-serif;">www.cbrplus.com / www.gravelock.com</span></div>
<!--EndFragment--><br />GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.com3tag:blogger.com,1999:blog-2180835630434913964.post-88200535289833968372012-09-04T10:05:00.004-07:002012-09-04T10:05:54.666-07:00Soil Stabilizers
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<!--StartFragment-->
<br />
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">I would like to make some points to try to explain ionic
soil stabilizers. <o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">Soil stabilizer is not the correct term, but it is the one
commonly used. Compaction aid or soil
consolidation aid are the more correct descriptive words, but the soil is
modified and performance is much more stable in high clay soils – so the term
stabilizer does apply.<o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">In order to be able to conduct some performance testing on
treated soil, one needs to understand the way in which the product reacts with
the soil. Clays contain certain cations
with an ionic imbalance, and in nature the way this ionic imbalance is
satisfied by water. These cations
attract and “hold on to” a large number of water molecules, called adsorbed
water, which surround the clay particle and these water molecules can only be
removed by high pressure or temperature e.g. in a potters kiln. The fact that you try to compact water coated
molecules reduces particle interlock and so reduces strength, this is usually
referred to as plasticity.<o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">The ionic stabilizer exchanges these cations in the clay with
ones that are in ionic balance and the adsorbed water that was previously held
onto by the clay is now released and has to make its way up to the surface of
the treated layer to evaporate from there. This water release takes time and
depending upon the soil type, traffic and weather conditions can take up to 30
days. During this time, the treated
layer becomes more dense as well as drying out and so increases in strength.
Depending upon the product used the soil will not re-adsorb the water as it has
previously and therefore exhibit higher strength even in wet weather. In essence the effect is one of the reduction
in susceptibility to moisture of clay based roads.<o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">The treatment is non cementitious like lime or cement or
other methods like polymers. So the soil will achieve it natural strength
rather that that provided by the above methods.<o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">In testing the effects of this treatment, one has to prepare
two sets of samples, one treated and one untreated. Both samples have to be let to dry out for 10
to 20 days and then tested and a significant improvement in the treated samples
will be noted over the untreated samples. </span><o:p></o:p></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">By: Rhino Rohrs</span></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;"><br /></span></div>
<div class="MsoNormal">
<span style="font-family: Arial, Helvetica, sans-serif;">www.cbrplus.com / www.gravelock.com</span></div>
<!--EndFragment-->GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.com4tag:blogger.com,1999:blog-2180835630434913964.post-10628008237108560672012-08-14T11:12:00.000-07:002012-08-14T11:13:48.036-07:00CBR Plus/Gravelock Treatment of Soil Enhances Grass Growth.<br />
<div class="MsoNormal" style="text-align: left;">
<b><span style="font-family: Arial;">Client: Wilamette Industries<o:p></o:p></span></b></div>
<div class="MsoNormal" style="text-align: left;">
<b><span style="font-family: Arial;">Location: Oregon, U.S.A.<o:p></o:p></span></b></div>
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<b><span style="font-family: Arial;">Road: Forestry Haul Road<o:p></o:p></span></b></div>
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<b><span style="font-family: Arial;"><br /></span></b></div>
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</div>
<div class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: Arial; font-size: 11.0pt;">The soil type of this road is a
heavy clay, A-7-6 –type material, which was treated with 0.022 litres/m2 of CBR
Plus/Gravelock. Due to the change in the harvest schedule, the road was not
used, therefore there was no further compaction by traffic following the
initial construction.<o:p></o:p></span></div>
<div class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
<br /></div>
<div class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
<i><span style="font-family: Arial; font-size: 11.0pt;">Note: Growth of the grass was significantly better in the section
treated with CBR Plus/Gravelock.<o:p></o:p></span></i></div>
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<br /></div>
<div class="MsoNormal" style="text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: Arial; font-size: 11.0pt;">Due to no further compaction, when
the treated layer finally released all of its moisture, the layer densified and
caused shrinkage cracks. To remedy this, the grass was bladed off the surface
and the layer re-compacted with a compactor and water tanker. No further
treatment was required.<o:p></o:p></span></div>
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<span style="font-family: Arial; font-size: 11.0pt;"><br /></span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJSwQ3FXhofZmKIF9FHCOp9ivheP2gEbD-nmc1gEHEjG8sJLzJbcNX7Ov7FYmPtCFoPcknOymFileb64AEWxTvet96eET2N-evV5u-4C-lalUZHt4k6v1JtSiTMXd0HHVyS3ji2f8Qc-1t/s1600/Image+11.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="209" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJSwQ3FXhofZmKIF9FHCOp9ivheP2gEbD-nmc1gEHEjG8sJLzJbcNX7Ov7FYmPtCFoPcknOymFileb64AEWxTvet96eET2N-evV5u-4C-lalUZHt4k6v1JtSiTMXd0HHVyS3ji2f8Qc-1t/s320/Image+11.jpeg" width="320" /></a></div>
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</div>
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<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
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<span style="font-family: Arial;">Untreated Road (little or no grass).<o:p></o:p></span></div>
<div align="center" class="MsoNormal" style="text-align: center;">
<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTbqG4gEhj1PiR9oMVEmppaOq7gfUf_sAYZq6tp3LtUv29rnTZllCbNrhcSyyQzL6ahd_shhcafFfRZ_EKuwIWwLfY_zYy73VwWwVwScfe5gS-k5RQFWUCzkZWmg5b0Fi9nRsKah2iiO6l/s1600/Image+9.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="209" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTbqG4gEhj1PiR9oMVEmppaOq7gfUf_sAYZq6tp3LtUv29rnTZllCbNrhcSyyQzL6ahd_shhcafFfRZ_EKuwIWwLfY_zYy73VwWwVwScfe5gS-k5RQFWUCzkZWmg5b0Fi9nRsKah2iiO6l/s320/Image+9.jpeg" width="320" /></a></div>
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<span style="font-family: Arial;">Untreated Road (minor shrinkage cracks).<o:p></o:p></span></div>
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<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9n3lSyY9g71FhoZfERBjm6TmzkrxfVVKInwzOScuxWo_JoBZ7AWCNJGsvetBzAZ9syjSh77UDkcyKYHsxvxSyvrApu1hkAXs2d6AK3ZpluH7_LOKX_4V9XinbHsFS0gY9oY_444UxxslH/s1600/Image+1.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="209" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg9n3lSyY9g71FhoZfERBjm6TmzkrxfVVKInwzOScuxWo_JoBZ7AWCNJGsvetBzAZ9syjSh77UDkcyKYHsxvxSyvrApu1hkAXs2d6AK3ZpluH7_LOKX_4V9XinbHsFS0gY9oY_444UxxslH/s320/Image+1.jpeg" width="320" /></a></div>
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<br /></div>
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<span style="font-family: Arial;">Transition Partially Treated (not much grass).<o:p></o:p></span></div>
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<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiKbNO_hMJnHjxO9BREUyLJ09jvrSCm1Fc2SRrdaX-ho0PhyLbQe0IPrzxuDUopUp7gr4ZwhtL2ekQv08YvAeA4mnILveIcJSp9PYyQPLcPf_uiWWNx6WT16Mj7MQO86EwaCrNvJeKu9ynU/s1600/Image+7.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="209" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiKbNO_hMJnHjxO9BREUyLJ09jvrSCm1Fc2SRrdaX-ho0PhyLbQe0IPrzxuDUopUp7gr4ZwhtL2ekQv08YvAeA4mnILveIcJSp9PYyQPLcPf_uiWWNx6WT16Mj7MQO86EwaCrNvJeKu9ynU/s320/Image+7.jpeg" width="320" /></a></div>
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<br /></div>
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<span style="font-family: Arial;">Treated Road (grass after one season, self seeded).<o:p></o:p></span></div>
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<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdkkTtAM0_WZxxcNSC3WYi19REN4MRnX_eyXPOtpNqoON-8DXSN2bx3z1PlcYxyqe-ef3STQqpTiWjZBdIuUT7vQWjb8snDcpmomJmDPoDn2lL6opWZuajhP0Zs5pOvccPyd3BMhFv04jc/s1600/Image+5.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="209" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdkkTtAM0_WZxxcNSC3WYi19REN4MRnX_eyXPOtpNqoON-8DXSN2bx3z1PlcYxyqe-ef3STQqpTiWjZBdIuUT7vQWjb8snDcpmomJmDPoDn2lL6opWZuajhP0Zs5pOvccPyd3BMhFv04jc/s320/Image+5.jpeg" width="320" /></a></div>
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<span style="font-family: Arial;">Treated Road (grass growing abundantly over treated
area).<o:p></o:p></span></div>
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<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5ZQd1U-WZoqn4rWlcXYlxnOj8yHorEVIetPrTZq5FG6QNvcX5OP75W-nCHbE_yhyphenhyphenn6acXnT-rQfk86Yep1-zbiVyeC-RydWTbV4bGh0sJyfX6vy6iaDGeVS0p-fRkUz26_VWuZciWrseV/s1600/Image+3.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="209" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5ZQd1U-WZoqn4rWlcXYlxnOj8yHorEVIetPrTZq5FG6QNvcX5OP75W-nCHbE_yhyphenhyphenn6acXnT-rQfk86Yep1-zbiVyeC-RydWTbV4bGh0sJyfX6vy6iaDGeVS0p-fRkUz26_VWuZciWrseV/s320/Image+3.jpeg" width="320" /></a></div>
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<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
<br />
<br />
<div align="center" class="MsoNormal">
</div>
<div align="center" class="MsoNormal">
<span style="font-family: Arial;">Treated Road (note heavy clay soil in ditch while
road is dry).<o:p></o:p></span></div>
<div align="center" class="MsoNormal">
<span style="font-family: Arial;"><span style="font-size: x-small;"><br /></span></span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial;"><span style="font-size: x-small;"><b><br /></b></span></span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial;"><span style="font-size: x-small;"><b>By: Rhino Rohrs</b></span></span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial;"><span style="font-size: x-small;"><b><br /></b></span></span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial;"><span style="font-size: x-small;"><b>Rhide Technologies Inc.</b></span></span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial;"><span style="font-size: x-small;"><b><br /></b></span></span></div>
<div class="MsoNormal" style="text-align: left;">
<span style="font-family: Arial;"><span style="font-size: x-small;"><b>www.cbrplus.com / www.gravelock.com</b></span></span></div>
GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.com0tag:blogger.com,1999:blog-2180835630434913964.post-77755457764142688632012-07-04T09:44:00.001-07:002012-07-04T09:46:27.656-07:00Stabilization of a Military Airstrip in Afghanistan<br />
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<span class="Apple-style-span" style="font-family: Arial;"> </span></div>
<div class="MsoNormal">
<span class="Apple-style-span" style="font-family: Arial;"><span style="font-family: Arial;">A military base in Central Afghanistan was experiencing problems with their landing strip, which was unpaved and causing severe dust problems during landing and takeoff. The runway base consists of the local clayey soil and during the rainy season the surface ruts and also becomes very slippery. The runway is used mainly for Hercules C130 supply aircraft and these conditions make landing on the runway difficult and dangerous. Flights would have to be suspended at times, due to the poor condition of the runway.<o:p></o:p></span></span></div>
<span class="Apple-style-span" style="font-family: Arial;"> </span><br />
<div class="MsoNormal">
<span class="Apple-style-span" style="font-family: Arial;"><br /></span></div>
<div class="MsoNormal">
<span class="Apple-style-span" style="font-family: Arial;"><span style="font-family: Arial;">The Military decided to try to remedy this problem by stabilizing the runway. <o:p></o:p></span></span></div>
<div class="MsoNormal">
<span class="Apple-style-span" style="font-family: Arial;"><br /></span></div>
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<span class="Apple-style-span" style="font-family: Arial;"><span style="font-family: Arial;">To achieve this, the main consideration were:</span></span></div>
<div class="MsoNormal">
</div>
<span class="Apple-style-span" style="font-family: Arial;"><br />
</span><br />
<ul><span class="Apple-style-span" style="font-family: Arial;">
<li>The military base is in a remote location with hostile surroundings.</li>
</span></ul>
<span class="Apple-style-span" style="font-family: Arial;">
<ul>
<li>There is no local gravel that could be used to surface the runway.</li>
</ul>
<ul>
<li>If lime or cement stabilization of the base were to be a consideration, this material would have to be shipped in with truck convoys though Pakistan, and which would probably never reach the base’s location due to hostile action along the way.</li>
</ul>
<ul>
<li>The time constraints to get this project completed before the rainy season set in also prevented the lime or cement option, as well as the other option of setting up a crusher and grading sieves for local gravel production. </li>
</ul>
<span class="Apple-style-span" style="font-family: Arial;"><div>
<span class="Apple-style-span" style="font-family: Arial;"><span class="Apple-style-span" style="font-family: Arial;"><br /></span></span></div>
The runway surface has stabilized now to such an extent, that the C130 planes leave rubber tire marks on the runway surface where the aircraft wheels touch down and make contact with the runway.</span><br />
<span class="Apple-style-span" style="font-family: Arial;"><br />
</span>These factors led to the consideration of using a liquid soil stabilizer like CBR PLUS which is a highly concentrated liquid treatment medium and as result could be flown into the location on one flight together with the personnel to complete the operation.<br /><div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial;">Although the initial proposed treatment method was to scarify the surface or to haul in a suitable layer of soil and to then apply the stabilizer, it soon became apparent that these options would not be suitable, as there were numerous daily flights in and out on the runway. This method of construction of the runway was therefore not possible.<o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial;">The ability to spray apply the CBR PLUS / water mixture straight onto the surface in low dosages and repeated applications proved in the end to be the best solution. This process was completed without having to delay or interrupt flights and the desired results were achieved. <o:p></o:p></span></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial;">Shortly after completion rains set in for three days non-stop, with the runway hardening and being solid enough for the planes to continue using the airstrip. The runway was then also compacted with a vibrating roller compactor, to leave hard dry surface.<o:p></o:p></span></div>
</span><span class="Apple-style-span" style="font-family: Arial;"><div class="MsoNormal" style="mso-layout-grid-align: none; mso-pagination: none; text-autospace: none;">
<span class="Apple-style-span" style="font-family: Arial;"><br />
</span></div>
</span><span class="Apple-style-span" style="font-family: Arial;"> <div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: Arial;">Dust has been reduced significantly as well. <o:p></o:p></span></div>
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<span style="font-family: Arial;"><br />
</span></div>
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<span style="font-family: Arial;"><br />
</span></div>
<div class="MsoNormal" style="text-align: center;">
<span style="font-family: Arial;">Before:</span></div>
<div class="separator" style="clear: both; text-align: center;">
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<span style="font-family: Arial;">By: Rhino Rohrs</span></div>
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<span style="font-family: Arial;">www.cbrplus.com / www.gravelock.com</span></div>
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<br />GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.com0tag:blogger.com,1999:blog-2180835630434913964.post-12916002192633953672012-06-05T13:29:00.000-07:002012-06-05T13:35:04.658-07:00Non-Standard Soil Stabilizers<span class="Apple-style-span" style="font-family: Helvetica;">There is the “myth” out there, that there are some wonder substances that will cure all soil stabilization and dust problems on all soil types in roads. This is unfortunately postulated as such, by some suppliers and users alike. As a supplier of a particular material used to stabilize clays in road bases for some 15 years now, it has become very clear that, with the immense variety of soil types and road characteristics, that this type of silver bullet treatment is impossible. The various products are usually suitable for a particular soil type or road design and not suitable to treat highly plastic clays and gravels with the same good results. In many cases the products are applied to the wrong soil type and/or not constructed in the right way. </span><br />
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<span class="Apple-style-span" style="font-family: Helvetica;">We believe that there some good non-traditional road treatment products out there that are suitable for specific soil types and careful selection and design procedures for each project should be carried out before deciding on a specific product type. In some cases there are similar technologies that will resolve a particular soil problem with differing results such as life cycle of the particular technology and the exercise then becomes more of a value engineering process.</span><br />
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<span class="Apple-style-span" style="font-family: Helvetica;">By: Rhino Rohrs</span><br />
<span class="Apple-style-span" style="font-family: Helvetica;">Rhide Technologies Inc.</span><br />
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<span class="Apple-style-span" style="font-family: Helvetica;">www.cbrplus.com / www.gravelock.com</span><br />
<span class="Apple-style-span" style="font-family: Helvetica;"><br /></span>GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.com1tag:blogger.com,1999:blog-2180835630434913964.post-89931971188069214692011-12-13T11:41:00.001-08:002012-01-09T12:52:49.346-08:00Stabilization of Clay Road Bases.<div style="text-align: justify;">
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<span class="Apple-style-span" style="color: #262626; font-family: Arial;">Gravel preservation on unpaved rural roads has become the prime concerns for road maintenance by the Saskatchewan Regional Municipalities. This concern was highlighted in the recent study of the Department of Highways and Transportation on graveled roads in Saskatchewan and is heightened by the new practice whereby heavy axle load traffic gets diverted off the paved highways onto the gravel paved roads.</span></div>
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<span style="color: #262626; font-family: Arial;">While current practice of Counties is to treat the surface on gravel surfaced roads with the application of dust palliatives such as calcium or magnesium chlorides, lignin sulfonates and asphalt emulsions in an effort to reduce gravel loss and dust, these mediums have been proven to be a temporary measure, which at best last one season or less. Gravel loss is mitigated and surface gravel is retained somewhat until these materials become leached out or otherwise ineffective. In areas with clay in the road base, this surface treatment is much less effective and gravel loss is exacerbated by the effects that the clay exhibits on the road and, particularly in wet weather, the gravel is pounded into the road base. Also due to the effects of poor base strength rutting and other deformation occurs in the wheel paths. Loose gravel is ground up onto fine powder and increases the dust on the roads.</span><span style="color: #262626; font-family: 'Trebuchet MS';"><o:p></o:p></span></div>
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<span style="color: #262626; font-family: Arial;">Gravelock Technology addresses this problem and reduces gravel consumption on gravel surfaced roads by locking gravel into the road surface and so reducing gravel loss as well as reducing the need for gravel during initial construction by strengthening local soils. Gravelock improves road trafficability in wet weather and also helps to reduce dust in dry weather.</span><span style="color: #262626; font-family: 'Trebuchet MS';"><o:p></o:p></span></div>
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<span style="color: #262626; font-family: Arial;">Gravelock is designed to increase the osmotic and matric suction of typical clay based soils, while reducing the moisture susceptibility. It is this behavior that increases the strength and stiffness of typical clay based soils, while also locking in the gravel to minimize gravel loss. This treatment is long term and reduces both maintenance and dust by up to 80%. Roads can be repaired after treatment without having to re-apply more Gravelock. Payback for many clients in Canada is less than 18 months.</span><span style="color: #262626; font-family: 'Trebuchet MS';"><o:p></o:p></span></div>
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<span style="color: #262626; font-family: Arial;">We are now able to test your soils and ensure the best performance of your soil. On site supervision during construction ensures that the correct application and construction procedures are followed. Construction can be integrated with the road owner crews and equipment to help reduce outsourced costs or alternatively, full construction of a road can be provided with our equipment and crews.</span><span style="color: #262626; font-family: 'Trebuchet MS';"><o:p></o:p></span></div>
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<span style="color: #262626; font-family: Arial;">By: Rhino Rohrs. </span></div>
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<span style="color: #262626; font-family: Arial;">Rhide Technologies Inc.</span><o:p></o:p></div>
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<span style="color: #262626; font-family: Arial;">Email: rohrs@cbrplus.com</span></div>
</div>GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.com4tag:blogger.com,1999:blog-2180835630434913964.post-72177556297826579302011-12-07T13:46:00.000-08:002012-01-09T12:53:15.205-08:00Road rehabilitation by COLD IN-PLACE RECYCLING of asphalt roads on clay.<div class="MsoNormal" style="line-height: normal; mso-margin-bottom-alt: auto; mso-margin-top-alt: auto;">
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<b><span style="color: black; font-family: Verdana;">Cold in place recycling</span></b><span style="color: black; font-family: Verdana;"> or Full Depth Rehabilitation, is the most cost effective method available today for the rehabilitation of existing paved roads.<o:p></o:p></span></div>
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<span class="Apple-style-span" style="font-family: Verdana;">The top layer of asphalt or seal is milled with a Road Re-claimer or road milling machine to various depths (usually 15 to 30 cm.) depending on the thickness of the asphalt layer, so that the existing asphalt is broken down into small pieces. This milled asphalt is then mixed with the base material during this milling process.</span></div>
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<span class="Apple-style-span" style="font-family: Verdana;">Gravel (course grained materials) bases or sub bases are then stabilized by the injection of hot foamed asphalt during the milling process to compact and bind the gravel particles. This treatment binds the gravel particles together during their placement and also reduces the future effects of moisture in the treated layer.</span></div>
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<span style="color: black; font-family: Verdana; line-height: 115%;">This foamed asphalt process however cannot be used where the base contains fine-grained or clay soil with a plastic index higher than 6.</span> </div>
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<b><span style="color: black; font-family: Verdana;">CLAYS</span></b><span style="color: black; font-family: Verdana;">, or fine-grained soils, can likewise be treated by injecting a <b>CBR PLUS</b> / Water mixture instead of the foamed asphalt into the milled layer during milling.<o:p></o:p></span></div>
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<span style="color: black; font-family: Verdana;">The effects of the <b>CBR PLUS</b> is to release the adsorbed or bound water from the clay particles and facilitate better compaction for higher resulting densities, while at the same time stabilizing the clay to reduce the effects that moisture will have on the treated layer.<o:p></o:p></span></div>
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<span style="color: black; font-family: Verdana;">It is no longer necessary to remove and replace the clay in the base with gravel or similar fine-grained material, since the treatment with CBR PLUS will strengthen the in situ clay material.<o:p></o:p></span></div>
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<span style="color: black; font-family: Verdana;">The milled asphalt layer is finely ground into a gravel-like material. During this milling process, the ground asphalt is mixed evenly into the base layer to mechanically strengthen the base material. At the same time the CBR PLUS/water mixture is sprayed into this finely ground soil/asphalt mixture to stabilize the clay. The milled asphalt, together with the effectively stabilized clay components in the modified soil mixture, provides a strong base layer that resists the effects of moisture.<o:p></o:p></span></div>
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<b><span class="Apple-style-span" style="font-size: small;">COST SAVINGS</span></b></div>
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<li style="text-align: justify;">Obviates the need to haul away existing old asphalt/base soil - Work is done in place. </li>
<li style="text-align: justify;">New gravel to replace the existing clay base is no longer required. </li>
<li style="text-align: justify;">Provides a simpler and more cost effective stabilization than lime or cement. </li>
<li style="text-align: justify;">Requires only one pass with the Road Re-claimer - The work is fast. </li>
<li style="text-align: justify;">Treated layer is resistant to the effects of moisture - Lasts longer. </li>
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<span class="Apple-style-span" style="font-family: Verdana;">By: Rhino Rohrs. </span></div>
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<span class="Apple-style-span" style="font-family: Verdana;">Rhide Technologies Inc.</span></div>
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<span class="Apple-style-span" style="font-family: Verdana;">Email: rohrs@cbrplus.com<br />
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</div>GRAVELOCK / CBR PLUShttp://www.blogger.com/profile/16917062390327086971noreply@blogger.com0