Soil stabilization

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

A study of engineering properties of a clay modified by fly ash and slag

Abstract: Fly ash from power plants and slag from steel mills are two industrial solid wastes. These wastes can be utilized as soil stabilizers. In this study, a clay with low plasticity is mixed with 12 different proportions of fly ash and slay. The fly ash and slag contents range from 0 to 20 percent and 0 to 10 percent, respectively, on the dry weight basis. Laboratory investigations include compaction, unconfined compression triaxial consolidated undrained, and one dimensional consolidation test. Adding fly ash and slag to the clay results a decrease of maximum dry density and an increase of optimum water content of that clay, obtained in a standard Proctor compaction test. Results from the consolidation test indicate that additives have about the same compressibility effects on the clay. The compression indices and swell indices of clay-additive mixtures are about 18% to 36% and 40% to 60%, respectively, of the clay.

Utilization of Plastic Wastes for Improving the Sub-Grades in Flexible Pavements

Abstract: The objective of this study is to demonstrate that a waste material can be used as reinforcement and for this purpose a series of experimental study was carried out to investigate the California bearing ratio (CBR) behavior of waste plastic strip reinforced soil. The effect of waste plastic strip content (0.25% to 4.0%) and strip length on the CBR and secant modulus of strip reinforced soil was investigated. The study reveals that addition of waste plastic strips of appropriate size and proportions in soil results in an appreciable increase in both the CBR and secant modulus. The waste plastic strip reinforced soil can be used in low cost embankment/road construction leading to significant cost advantage as well as safe disposal of these waste materials in an environment friendly manner.

Evaluation of Resilient Modulus for Lime- and Cement-Stabilized Synthetic Cohesive Soils

Abstract: The effects of deviator stress, molding moisture content, stabilizer type and content, curing period, and soil type on the resilient modulus (Mr) of lime- and cement-stabilized cohesive soils were investigated by using Hydrite R (kaolinite) and sodium bentonite (montmorillonite) blends. It was found that Mr increases with decreasing deviator stress, increasing lime and cement content, and extended curing period. Moisture variations around optimum had little effect on Mr with higher lime contents. Multiple regression analyses and Student's t-tests indicated that all the factors investigated were significant and could be related to Mr by predictive regression equations. For a given stabilizer type and content, the low-plasticity clay (CL) soil produced the best results. The cement-stabilized CL soil normal cured for 28 days produced the highest Mr value. However, cement stabilization was not found to be very effective for the high-plasticity clay (CH) soil. Mineralogical composition has a marked effect on t...

Effects of Steel Slag Addition on the Plasticity, Strength and Permeability of Lateritic Soil

Abstract: An investigation into the effect of adding pulverized steel slag (an industrial waste product) on some geotechnical properties of a lateritic soil. The soil is A-7-6(5) according to AASHTO classification systems. 5%, 8% and 10% steel slag content (SSC) each by dry weight of soil, was used to stabilize the soil while evaluating the specific gravity, consistency limits, compaction, permeability, uncured and cured strength of the soil. The results obtained show that the increase in SSC decreased the OMC up to 8% SSC but increased the maximum dry unit weight. The increase in SSC reduced the soil plasticity and swell potential and it increased the permeability, cured and uncured strength of the soil. 8% SSC was observed to be the optimum content, based on results of uncured strength of the soil.

A review on stabilization of soil using bio-enzyme

Abstract: In developing countries like India the most importa nt requirement of any project after performance cri teria is its economical feasibility and serviceability criteria. The conven tional methods are time consuming and are not econo mically feasible. Hence there is a need to discover the other possible ways to satis fy the performance as well as economical criteria. In this paper, popularly available bio-enzymes and their effect on engineering propert ies of soil are discussed. The stabilization of soil with bio-enzyme is a revolutionary technique which becoming popular worl dwide. Recently there are many bio-enzymes availabl e for soil stabilization such as renolith, Perma-Zyme, Terra-Zyme, Fujibeton etc. These enzymes have been proven to be very ef fective and economical. Another advantage of the bio-enzyme is that these a re environment friendly. When these bio-enzymes are mixed with soil they alter its engineering properties. Their efficiency depends up on the amount of dose, type of soil available and f ield conditions. The use of bioenzyme in soil stabilization is not very popular due to lack of awareness between engineers and non availability of standardized data. However, recently some bio-enzyme stabilized roads were constructed in various parts of India, w hich are performing very well.