Soil stabilization

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

Strength Characteristics of Clayey Sub-Grade Soil Stabilized with Fly Ash and Lime for Road Works

Abstract: In this paper an attempt has been made to improve the strength properties of clayey soil (near NH-6, Burla of Sambalpur, Orissa, India) to be used as sub-grade by using locally available fly ashes as admixtures with lime. It is observed that addition of 3 % lime along with 30 % fly ash by weight of virgin soil showed a remarkable improvement in the California bearing ratio (CBR) values. The soaked (after 4 days soaking curing) CBR value of virgin clayey soil found to be 2.3 %. On the other hand, soil mixed with 30 % fly ash and 3 % lime by weight, the soaked CBR increased to 55.8 % after 8 days moist curing in air with additional 4 days soaking (total 12 days curing). Further it was observed that soil mixed with 30 % fly ash and 2 % lime, the soaked CBR increased to 48 % after same total 12 days curing, which was 21 times of CBR value of virgin soil. Also the modulus of elasticity of 70:30:3 mixes was found to be 230.87 MPa for sub-grade and 501.03 MPa for sub-base of road, where as that of only soil was found to be 24.64 MPa as sub-grade and 53.47 MPa for sub-base respectively. Some other mixes also showed promising values.

Evaluating the use of lemon grass roots for the reinforcement of a landslide- affected soil from Nilgris district, Tamil Nadu, India

Abstract: For many centuries, man has been concerned with stabilizing soils in order to either prevent them from being easily eroded or to make them better suited for construction such as for earth building and road construction purposes. Attempts have been made to utilize many natural, synthetic or waste materials for such soil stabilization. Plants have been used as soil cover to prevent erosion and protect slopes. However, there is need to evaluate the engineering characteristics of soils reinforced with plant roots. Consequently, this research work was aimed at investigating the effects of the reinforcement of a landslide-affected soil using the roots of a locally-available plant on the strength and permeability properties of the soil. The natural moisture content, specific gravity, particle size distribution, Atterberg limits, compaction characteristics, shear strength, unconfined compressive strength (UCS) and permeability of the natural (landslide-affected) soil were determined. Results obtained for the natural landslide-affected soil were compared with those of the soil sample admixed with varying proportions (1%, 2%, 3% and 4%) of lemon grass roots. The result shows that the shear strength and UCS of the soil having 4% lemon grass roots is almost double that of the natural soil. Also, the permeability of the soil-root matrix was sufficiently reduced. Planting lemon grass on soils located along slopes is recommended to improve its strength and minimize the ease with which water infiltrates the soil, thereby reducing the incidence of landslide and other water-induced types of slope failure.

Geo-engineering properties of fly ash

Abstract: The aim of the Project is to find out the geo-engineering properties of fly ash, which can act as a stabilizer to many soils in geo-engineering field. The project describes the use of local fly ash in construction industry in a way to minimize the industrial waste. Their been serious shortage of natural material, which are used in Highway or Earth dam construction. Due to soil excavation, deforestation occurs which affects the bio-diversity. Industrial waste such as fly-ash, slag etc can be effectively used in soil stabilization. Several geo engineering Labrotory experiments were performed on fly ash to determine its properties, which may be used in road construction, earth dam construction, soil stabilization etc. If these materials can be used in highway or dam construction, it will be a great effort in minimizing the industrial pollution. Fly ash was collected from captive power plant from the dump pad of Rourkela steel plant. These are stored in air tight container after being oven-dried. Experiments such as determination of compaction properties, CBR analysis, Un-confined compressive strength test, permeability etc are done in order to determine the geo-engineering properties of fly ash, which can taken account in the construction field. A brief comparison is made between fly ash and other soil properties which are used as sub-grade, base in Highway construction.

An overview of traditional and non traditional stabilizer for soft soil

Abstract: Soft soil always deal with high compressibility, high water content, low shear strength and low permeability. All these challenges lead to soil failure such as excessive settlement, failure of sub structure which is lead to superstructure damage and many others failure. Hence, soil stabilization is one of the option in ground improvement technique by adding other stabilization agent either natural basis or chemical basis. This paper critically reviewed about advantages and disadvantages of chemical stabilizer namely traditional and non traditional. Also closely reviewed on polymer and lignosulfonate as soil stabilization agent in various type of soil. Reviewed and analysing of some references revealed that using non traditional stabilizer have more advantages than traditional stabilizer in term of engineering properties as well as chemical composition. Polymer and lignosulfonate also have their on specialties in order to corporate with various type of soil.

Use of Standard and Off-Spec Fly Ashes for Soil Stabilization

Abstract: There has been significant utilization of standard fly ashes, Class C and Class F fly ashes, in the cement industry and in soil stabilization applications. However, the majority of the fly ...