scispace - formally typeset
Search or ask a question
Topic

Soil stabilization

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


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the authors propose that premature failures in chemically stabilized expansive soils cost millions of dollars in maintenance and repair and one reason for these failures is the inability of existing stabilization desi...
Abstract: Premature failures in chemically stabilized expansive soils cost millions of dollars in maintenance and repair. One reason for these failures is the inability of existing stabilization desi...

47 citations

Journal Article
TL;DR: In this article, the effectiveness of hydrated lime and portland cement on three Texas clays was evaluated and the results showed that lime treatment of expansive, high-plasticity soils was more favorable for compressive strength attainment than was cement treatment of these soils.
Abstract: Stabilization of clay materials is of interest to any engineer who must deal with this type of soil. Stabilization techniques can be mechanical or chemical, or both, but the addition of a stabilizing agent is generally the favored approach. Lime in one form or another has been the most widely used stabilization agent for clay. However, portland cement to stabilize clay has been promoted and used in some applications. It was the purpose of this research to define the effectiveness of hydrated lime and portland cement on three Texas clays. Variables evaluated included two levels of treatment, two levels of pulverization, two compaction efforts, two moisture conditions, and a range of curing times. On the basis of the results and conditions of this test program, lime treatment of expansive, high-plasticity soils was more favorable for compressive strength attainment than was cement treatment of these soils. In general, lime treatment produced higher dry-conditioned strengths, but the major advantage was in the wet-conditioned strengths. Lime treatment provided significantly better resistance to moisture damage when these soils were compacted by the modified compactive effort. Cement treatment of low-plasticity sandy clay produced significantly higher compressive strengths than did lime treatment of this soil.

47 citations

Journal ArticleDOI
08 May 2017
TL;DR: In this article, the erodibility parameters of dense silica sand specimens treated with different injection strategies were investigated at bench scale, in terms of greater and more uniform calcite precipitation over the test-specimen length, and hence greater erosion resistance.
Abstract: Hydraulic erosion is one of the main causes of failure within earth dams and embankments. Various methods are used to mitigate against such erosion, a common approach being grouting with cement, clay or chemical materials. Biogrouting using the microbial-induced carbonate precipitation technique is a relatively new, cost-effective, technically appropriate and environmentally friendly soil improvement method. Bacteria injected into the soil produce urease enzyme, which converts urea to ammonium and carbonate, causing calcite precipitation that binds soil grains together. In this study, the erodibility parameters of dense silica sand specimens treated with different injection strategies were investigated at bench scale. More effective treatment – in terms of greater and more uniform calcite precipitation over the test-specimen length, and hence greater erosion resistance – was achieved by aeration during solution injections and by incorporating a drained stage between injection cycles. With the latter, calc...

47 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present the results of a comprehensive series of tests designed to provide an engineering data base to describe the behavior of silicate-stabilized sands and find that the injection of the grout solution into the sand adds a cohesion component to its strength without significantly altering its frictional component of strength.
Abstract: Strengthening and stiffening of a chohesionless, sandy soil in-situ by means of injection of a silicate solution that gels with time, is a technique that is finding growing applicability to geotechnical problems. This paper presents the results of a comprehensive series of tests designed to provide an engineering data base to describe the behavior of silicate-stabilized sands. Basically, it is found that the injection of the grout solution into the sand adds a cohesion component to its strength without significantly altering its frictional component of strength. Key variables that influence the behavior of the silicate are the grout mix components, confining pressure, loading rate, curing environment, curing time, and grain size of the soil. Loading rate is important because the grouted soil tends to creep with time and can fail in creep rupture. Only 50% of the strength defined in a rapid load test can be relied upon for long-term load conditions.

47 citations

01 Feb 2002
TL;DR: In this paper, the authors designed a laboratory test sequence to identify the optimum amount of portland type I cement for stabilizing two aggregates, limestone and recycled concrete, typically used in the Houston District.
Abstract: Researchers designed a laboratory test sequence to identify the optimum amount of portland type I cement for stabilizing two aggregates, limestone and recycled concrete, typically used in the Houston District. Smectitic compositions identified through mineralogical investigations corresponded with the poor performance of the untreated aggregates in preliminary testing and substantiated the need for stabilization. Samples were subsequently treated with 1.5%, 3.0%, and 4.5% cement and tested for strength, shrinkage, durability, and moisture susceptibility in the laboratory. Strength was determined with the Soil Cement Compressive Strength Test (TxDOT Test Method Tex-120-E), and a linear shrinkage test was developed to assess shrinkage characteristics. Durability was evaluated with the South African Wheel Tracker Erosion Test (SAWTET), and moisture susceptibility was assessed with the Tube Suction Test (TST). The limestone aggregate was also subjected to modulus testing. Based on these parameters, stabilized samples exhibited markedly improved performance with minimum additions of cement. Based on the results of the laboratory testing, the recommendation of this report is 3.0% cement for the limestone and 1.5% cement for the recycled concrete. For future testing of aggregate base materials to determine optimum cement contents, the joint utilization of the strength test and the TST is recommended. Sufficient quantities of cement should be added to tested samples to obtain minimum unconfined compressive strengths of 300 psi in the former and maximum average surface dielectric values of 10 in the latter. The minimum amount of cement necessary to satisfy both criteria should be recommended for pavement construction. In addition to these tentative specifications, a provisional pre-cracking procedure is also suggested in this report for further evaluation.

47 citations


Network Information
Related Topics (5)
Aggregate (composite)
31K papers, 354.1K citations
80% related
Portland cement
27.4K papers, 487.4K citations
79% related
Hydraulic conductivity
12K papers, 339.7K citations
76% related
Landslide
24.6K papers, 472.1K citations
76% related
Fly ash
47.6K papers, 675.6K citations
75% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202364
2022128
2021213
2020167
2019173
2018168