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Physical and Engineering Properties of a Cement Stabilized Soft Soil Treated with Acrylic Resin Additive
Geotechnical Engineering Division, Department of Civil Engineering and Geotechnical Engineering Division, Department of Civil Engineering | |
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ABSTRACT |
The soil mixing, a ground modification technique, has been used for many diverse applications including building and bridge foundations, retaining structures, liquefaction mitigation, temporary support of excavations, water control and structures that protect the natural environment. This method has a basic target, to find the most efficient and economical method of mixing cement with soil, so that, the soft soil obtains properties more like to those of a soft rock, such as a clayey shale or lightly cemented sandstone.
Soft soils are well known for their low strength and high compressibility. Usually, due to sedimentary process on different environments, both physical and engineering properties (namely void ratio, water content, grain size distribution, compressibility, permeability and strength) show a significant variation. Further, they exhibit high compressibility (including an important secondary consolidation), reduced strength, low permeability and compactness, and consequently low quality for construction. Thus, deep mixing has recently been used to improve the strength and deformation characteristics of these soft clays.
For the aforementioned reasons, a comprehensive laboratory testing programme was carried out in order to study the effect of inclusion of cement and acrylic resin on physical and engineering behaviour of a soft clay. Series of unconfined compression, oedometer consolidation, durability, porosity, permeability tests were conducted with cement content varying from 5% to 30% w/s.w.(weight by soil weight) and acrylic resin of 5%w/c.w.(weight by cement weight) and having curing periods of 7 and 28 days.
Keywords: stabilization, cement, acrylic resin, compressive strength, slaking, permeability, compressibility.
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