Soil stabilization

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

Utilization of Sustainable Materials for Soil Stabilization: State-of-the-Art

Abstract: Most of the challenging soil deposits necessitate their stabilization either by adopting mechanical modification, which includes soil replacement, compaction, surcharge loading and piling or chemical alteration by using lime, cement, and chemical additives. These methods of stabilization are oriented towards improving certain defined properties such as plasticity, swell potential, strength, and density of the soil mass. Besides, one of the most crucial challenges that is faced is “stabilization induced cracking of the fine-grained soils,” which turns out to be the basic reason for the failure of the soil mass and subsequent failure of the structures. However, concerns such as non-availability of the ideal soil for replacement of the native soil and even inaccessibility of the site and laborious soil-stabilizer mixing methods necessitate exploring suitable alternatives for stabilization of such soil deposits that adds up to the vows of the practicing engineers. A few other pressing issues which need to be addressed are the adverse effects caused by these additives on the environment (viz., release of greenhouse gases and/or subsequent leaching of chemicals into the ground water). In such a scenario, application of industrial by products (viz., fly ash, cement kiln dust, blast furnace slag, rice husk ash, silica fumes, red mud, and textile waste), which could be defined as “sustainable materials,” find a special place in the modern-day soil stabilization and modification exercise. Keeping this in view, a critical synthesis of the literature has been presented in this paper, which showcases superiority of the sustainable materials over the conventionally used soil stabilizers and the need for conducting further research to make these materials an easy and choicest replacement over the former.

Stabilization of sulfate-containing soil by cementitious mixtures mechanical properties

Abstract: Winn Rock (CaSO4) gravel from a quarry in Winn Parish in north Louisiana was used extensively as a surface course for local parish roads. Stabilization of these roads with Type I portland cement followed by an overlay of asphaltic concrete resulted in heaving. A study was undertaken to investigate the cause or causes of the expansion as well as to identify an alternate means of stabilization. Specimens of representative soil from the affected area were stabilized in the laboratory using various cementitious materials and were cured using a variety of methods. The mix contained 5% to 20% cementitious material. The cementitious materials were Type I portland cement, lime, and supplementary cementing materials such as granulated blast furnace slag (BFS), Class C fly ash (CFA), silica fume, and an amorphous silica (AS). The uncon-fined compressive strength of the stabilized soil was determined. The effect of size fractions other than the gravel on the expansion was assessed, and the expansion of the specimens...

Properties of solid waste incinerator fly ash

Abstract: Since the late 1950s solid waste incinerators have become widely used in the United States. The incineration of solid waste produces large quantities of bottom and fly ash, which has been disposed of primarily by landfilling. However, as landfills become undesirable other disposal methods are being sought. An experimental research program is conducted to determine engineering properties of solid waste incinerator fly ash (SWIF) in order to evaluate the feasibility of using the material for compacted fill and road and subbase construction. Moisture‐density relationship, permeability, shear strength, and California bearing ratio (CBR) are investigated. The effects of densification on these engineering properties are also examined. In addition, the effectiveness of cement and lime stabilization is investigated using two common mix ratios. Test results of stabilized mixes are compared to the unstabilized material. Cement stabilization is found to be very effective in reducing permeability, and increasing shea...

Discussion of "Unified Approach to Ground Improvement by Heavy Tamping"

Abstract: A world-wide review of heavy tamping projects indicated that highly organic clays which due to their secondary compression characteristics may not be amenable to treatment by surcharge and vertical drain installation alone, may nevertheless be stabilized by applying high energy impact on installed dynamic replacement (DR) sand columns using a conventional dynamic consolidation plant. Field trials were thus conducted to enforce primary, as well as to negate secondary, compression of in situ peaty clay deposits by this form of treatment application, in the course of which dynamic replacement and mixing (DRM) of such soils with sand charges was originally identified as a distinct ground-improvement mechanism. From the field results and review, it is also perceived that ground-improvement mechanisms resulting from the application of a wide variety of heavy tamping plant and procedures to soils ranging from granular to highly organic cohesive materials may be generalized on a common physical basis. Further, unique relations may apparently be construed between alternative measures of degree of ground improvement on the one hand, and a collective term incorporating initial soil consistency and standard operational parameters of ground treatment on the other, thereby providing a basis for rational performance design.