Soil stabilization

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

Geotechnical Properties of Fly Ash and its Application on Soft Soil Stabilization

Abstract: Soil stabilization has become the major issue in construction engineering and the researches regarding the effectiveness of using industrial wastes as a stabilizer are rapidly increasing. This paper briefly describes the suitability of the local fly ash to be used in the local construction industry in a way to minimize the amount of waste to be disposed to the environment causing environmental pollution. Several civil engineering laboratory tests are conducted to study the geotechnical properties of fly ash and strength gain when mixed with local clay sample. A different proportion of fly ash and soil sample cured for 7 days results in a strength gain. A better understanding of the properties of fly ash is gained from the study and the tests indicates an improved strength and better properties of soft soil sample when stabilized. ivil engineering projects located in areas with soft or weak soils have traditionally incorporated improvement of soil properties by using cement and lime. Use of fly ash as a ground improvement soil admixture, when found viable, will be effective in terms of cost and a good approach to the environment to preserve and minimize accumulation of industrial waste. This study is performed to obtain geotechnical properties of fly ash for its application in the stabilization of soft soil. The geotechnical properties of fly ash will be evaluated with various laboratory tests to investigate the feasibility of using fly ash in soft soil stabilization. Constructions over soft soil are one of the most frequent problems in many parts of the world. The typical approach to soil stabilization is to remove the soft soil, and substitute it with a stronger material of crushed rock. Due to substantial cost of replacement, alternative methods to the problems are assessed. The study of using coal combustion residues, fly ash, is carried out to observe the effectiveness of its addition on stabilization of soft soil. This is one of the approaches to overcome the increasing amount of solid waste generated by the population. As land is a very valuable commodity and landfills are fast diminishing, the disposal of the ash generated from solid waste incineration poses increasingly difficult problems for the municipalities. A practicable solution to the disposal problems would be the reuse of solid waste ash for civil engineering applications. A research study of the geotechnical properties of the incinerator fly ash derived from solid waste incineration is investigated. The objectives of the study are to determine the geotechnical properties of fly ash and to investigate the effects of fly ash addition for strength of stabilized soft soil. Scope of this study is to analyze the consequences of the application of fly ash in soft soil stabilization. It covers methods for determining the geotechnical properties of fly ash to assess its suitability for soft soil stabilization. The fly ash is taken from Sejingkat Thermal Plant, Kuching.

Effect of bio-enzyme stabilization on unconfined compressive strength of expansive soil

Abstract: Engineers often face the problem of constructing facilities on or with soils, which do not posses sufficient strength to support the loads imposed upon them either during construction or during the service life of the structure. Vast areas of India consist of Black Cotton Soil which has high clay content, low strength and minimal bearing capacity. The poor engineering performance of such soils has forced Engineers device cost effective and ecofriendly methods for improving the engineering properties of poor soils. As the conventional soil stabilizers like gravel, sand, etc. are depleting and becoming expensive day by day at a very rapid pace, it becomes necessary to look towards for alternative ecofriendly stabilizers as their substitute. Recently many Bio-enzymes have emerged as cost effective stabilizers for soil stabilization. One such bio-enzyme, Terrazyme, has been used in the present work to study its effect on the Unconfined Compressive strength of the Black Cotton soil. It has been found that Terrazyme treated Black Cotton soil shows significant increase in Unconfined Compressive strength with longer curing period.

Stabilization of Dune Sand Using Foamed Asphalt

Abstract: Foamed asphalt technology has increasingly gained acceptance as an effective and economical soil improvement and stabilization technique, mainly because of its improved aggregate penetration, coating capabilities, and handling and compaction characteristics. This laboratory research program was carried out to investigate the feasible use of foamed asphalt technology in Saudi Arabia to improve the prevalent dune sands for possible use as a base or subbase material. Several variables were investigated to evaluate the relative improvement of dune sand as well as to permit the development of design procedures for the future use of foamed asphalt technology in the harsh climatic conditions of eastern Saudi Arabia. Statistical analysis of the results was employed to verify the effects of emulsified asphalt and foamed asphalt treatment, with and without the addition of Portland cement, on the strength characteristics of the treated mixes. The results displayed significant improvement in the performance of dune sand foamed asphalt mixes, as compared to that of the emulsified asphalt mixes.

Effect of vegetation on slope stability

Abstract: Two ways are considered in which vegetation can affect slope stability: changes in the soil moisture regime and contribution to soil strength by the roots. Simple analytical models that may be used to calculate water infiltration into soil and soil reinforcement by roots are reviewed and their applications to stability problems are illustrated by examples. The need for reliable field data to support the analytical models is emphasized.