Soil stabilization

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

Nanostructured Waste Paper Ash Treated Lateritic Soil and Its California Bearing Ratio Optimization

Abstract: The stabilization potentials of NWPA and the CBR optimization were investigated on the treated olokoro lateritic soil. The soil was classified as an A-2-7 soil according to AASHTO classification method. From the stabilization procedure, it has been found that the admixture improved the strength characteristics of the stabilized lateritic soil for use as base material in pavement construction. With the laboratory results, a nonlinear regression relationship was formulated through the multiple regression algorithms for the California bearing ratio (R) as a dependent variable with optimum water content (w), maximum dry density (D), and percentage by weight additive of NWPA (SA) as the independent variables. The nonlinear relationship was linearized to enable the optimization operation with Simplex Linear Programming (Optimization) to be conducted. This iteration procedure was conducted and the results showed that the CBR (R) was optimized at Rmax=219.16% with x1= 48.103, x2=4.833, x3=13.45, and x4= 0.948 in the stabilization of lateritic soils with NWPA as an admixture applied in the percentages of 0, 3, 6, 9, 12, and 15%.

Essay competition: Green, ground and great: soil stabilization with slag

Abstract: The reuse of materials, which would in the past have been considered as waste to be dumped at some land® ll site, possibly in the middle of attractive countryside, has now become a very desirable option. It is a popular way for companies to demonstrate and advertise environmentally friendly behaviour and has in some cases proved to have considerable economic advantages. Within the context of increasing land® ll taxes and possible health hazards often associated with stockpiling of the waste, no material can afford to be stigmatized as a `waste product’ any more. Labelled as `by-products’ or r̀ecycled goods’ , the `waste’ material is now fed into the industry from whence it originated to be reprocessed for a wide range of other applications. Thus old tyres, brick waste or even empty soda and lager cans are ® nding new and innovative uses and many yet undreamt of applications wait to be tried. A less visible but nonetheless useful `waste’ material has already found reapplication in the construction industry: ground granulated blast furnace slag (GGBS) has been known for some time to improve the sulphate resistance of concrete, when incorporated into cement. Its application for geotechnical purposes, however, has been rather limited in the past.

Field Testing of Stabilized Soil

Abstract: Remediation of a Superfund site in Stratford, Connecticut, involved stabilization of the subgrade with portland cement Part of the remediation site was to be used as a parking area The stabilized soil was to be covered with natural base/subbase course materials and capped with an asphalt concrete cover During the course of the remediation, a base-course layer could not be placed prior to the onset of winter A field study was conducted to quantify any changes in the mechanical properties of the open stabilized subgrade subjected to freeze-thaw cycling during the winter of 1996-1997 Field evaluation was conducted with pavement industry tools: the Clegg impact hammer and the dynamic cone penetrometer Evaluation results show the viability of the Clegg hammer as an instrument for quality assurance and also show that there can be up to 50% loss in compressive strength of the subgrade within the uppermost layer of the material caused by freeze-thaw cycling

Effects of alkali-activated waste binder in soil stabilization

Abstract: Generally, alkali-activated binders have received much attention in recent years due to their energy efficiency, environmentally friendly process, and excellent engineering properties. With respect to this fact, this study aims to investigate the effects of alkaline activation reactions on residual soil by using different percentages of fly ash as a precursor. Precisely, fly ash was incorporated with potassium hydroxide (10M) in order to stabilize the soil and enhance its expediency for various forms of construction. In particular, this experimental study was focused on determining the mechanical performance of stabilized soil. Evidently, the results showed that the different percentages of fly ash (40%, 50%, 60% and 70% by weight) used to stabilize the residual soil affected the unconfined compressive strength of the soil matrix. Also, it was observed that the compressive strength of soil increased progressively with the addition of fly ash. However, the longer the curing period of the stabilized soils, the higher the unconfined compressive strength of the soil. In fact, the microstructural analysis which employed scanning electron microscopy (SEM) revealed the material modifications that can be related to the strength behavior.

Dispersive Soil Problem at Los Esteros Dam

Abstract: Dispersive soil was discovered in the impervious borrow area at Los Esteros Dam and, through the use of sand filters and lime treatment of specific areas, the dispersive soil was used in the impervious core of the dam. Testing of the soil at the first laboratory was inconclusive, but testing at the second confirmed the soil to be dispersive. Tests were then conducted on the dispersive soil, sand filters, and lime-treated dispersive soil to determine whether sand filters and lime treatment could be used to control and alter the dispersive clay for use in the impervious core of the dam. Results of the program confirmed that a properly graded sand filter will control dispersive erosion through the impervious core and lime treatment alters the soil to a nondispersive material. A sand filter was constructed downstream of the impervious core and, where the base of the impervious core is founded on a fractured sandstone, a 5-ft (1.5-m) thick layer of the core was treated with lime.