Soil stabilization

About: Soil stabilization is a research topic. Over the lifetime, 3161 publications have been published within this topic receiving 48437 citations.

Laboratory performance evaluation of cement-stabilized soil base mixtures

Abstract: In-place cement-stabilized soils have served as the primary base material for the majority of noninterstate flexible pavements in Louisiana for many years. These materials are economically and easily constructed and provide outstanding structural characteristics for flexible pavements. However, these cement-treated materials crack due to shrinkage, with the cracks reflecting from the base to the surface. A laboratory study examined the performance of four different cement-stabilized soil mixtures recently used in the construction of test lanes at the Louisiana Pavement Testing Facilities. Laboratory tests included the indirect tensile strength and strain, unconfined compressive strength, and indirect tensile resilient modulus tests. The four mixtures were (a) in-place-mixed cement-treated soil with 10 percent cement, (b) plant-mixed cement-treated soil with 10 percent cement, (c) plant-mixed cement-treated soil with 4 percent cement, and (d) plant-mixed cement-treated soil with 4 percent cement and fiber ...

Evaluation of Sawdust Ash-Stabilized Lateritic Soil as Highway Pavement Material

Abstract: Large quantities of sawdust waste are generated daily by the logging and lumbering industries, and their safe disposal is a major concern worldwide, whereas the properties of some lateritic soils make them undesirable for use in engineering construction. This paper presents the results of a laboratory evaluation of the characteristics of lateritic soil (LS) stabilized with sawdust ash (SDA), subjected to British standard light (BSL) compactive effort to determine their index, compaction, unconfined compressive strength (UCS), and California Bearing Ratio (CBR) results. The results of the laboratory tests show that the properties of LS improved when stabilized with SDA. The particle-size distribution improved from poorly graded, sandy, gravelly material for 100% lateritic soil and silty material for 100% SDA to the gradation with 94.9–99.9% coarse aggregates of sand and gravel, described as gravelly sand and sandy gravel material for SDA-stabilized LS. The CBR results obtained from the study show t...

Effect of addition of construction–demolition waste on strength characteristics of high plastic clays

Abstract: Various wastes have gained attention nowaday as they are widely used in stabilization of expansive soils. The construction–demolition waste has not been widely used in soil stabilization, and its use is still under research. A lot of construction–demolition waste is being produced from old dismantled buildings whose disposal is a major concern due to limited availability of land space. This paper presents a laboratory investigation using consolidated drained triaxial test in order to study the stress–strain and volumetric behavior, shear strength parameters, strength ratio at various strain levels and stiffness of un-stabilized as well as crushed construction–demolition waste (CCDW) stabilized soil. The test results revealed that the addition of CCDW in un-stabilized soil has improved its stress–strain and volumetric behavior remarkably, at all confining pressures. The volumetric strain has been found to be decreased with the addition of CCDW. The inclusion of CCDW in un-stabilized soil has decreased the cohesion value to a limited extent and increased the angle of shearing resistance significantly. An increase in strength ratio as well as the stiffness of un-stabilized soil has also been improved when it is stabilized with CCDW. In the end, a practical numerical example has been solved in order to make the readers understand the significance of the improvement in un-stabilized soil after incorporating CCDW into it. This mixture of CCDW-stabilized expansive soil can be used in construction of low-volume traffic roads and embankment stability.

Performance of soil stabilization agents

Abstract: Poor subgrade soil conditions can result in inadequate pavement support and reduce pavement life. Soils may be improved through the addition of chemical or cementitious additives. Such chemical additives range from waste products to manufactured materials and include lime, Class C fly ash, portland cement and proprietary chemical stabilizers. These additives can be used with a variety of soils to help improve their native engineering properties. This report contains a summary of the performance of lime, cement, Class C fly ash, and Permazyme 11-X used with a wide range of soils. Each of the chemical additives tested is designed to combine with the soil to improve the texture, increase strength and reduce swell characteristics. These products were combined with a total of eight different soils with classifications of CH, CL, ML, SM, and SP. Durability testing procedures included freeze-thaw, wet-dry, and leach testing. Atterberg limits and strength tests were also conducted before and after selected durability tests. Changes in pH were monitored during leaching. Relative values of soil stiffness were also tracked over a 28-day curing period using the soil stiffness gauge. Lime and cement stabilized soils showed the most improvement in soil performance for multiple soils, with fly ash treated soils showing substantial improvement. The results showed that for many soils more than one stabilization option may be effective for the construction of durable subgrades. The enzymatic stabilizer did not perform as well as the other stabilization alternatives. It is recommended, based on the results of this research, that some testing of the contribution of proposed stabilization agents be conducted prior to construction. For pavement designs that expect a relatively limited strength contribution from the soil, the primary anticipated benefit of stabilization is generally the control of volume change.