Soil stabilization

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

Potentials of rice husk ash for soil stabilization

Abstract: Due to the large production of agricultural wastes, the world is facing a serious problem of its handling and disposal. The disposal of agricultural wastes has a potential negative impact on the environment causing air pollution, water pollution and finally affecting the local ecosystems. So it is mandatory to make these agricultural wastes ecofriendly. By using them as soil stabilizers, these agricultural wastes improves the strength of soil and its characteristics without causing any harm to the environment. The objective of this paper is to upgrade soil as a construction material using rice husk ash (RHA) which is a waste material. The cost of construction of stabilized road have been keeping financially high due to the over dependency on the utilization of industrially manufactured soil improving additives (cement, lime etc.). By using the agricultural waste (such as rice husk ash RHA) the cost of construction will be considerably reduced as well reducing the environmental hazards they cause. The performance of the soil-RHA was investigated with respect to compaction characteristics, unconfined compressive strength (UCS) and California bearing ratio (CBR) tests. The results obtained, indicates a considerable decrease in the maximum dry density (MDD), an increase in optimum moisture content (OMC) and a superficial improvement in the CBR and UCS values with the increase in the RHA content. The peak UCS values were recorded at between 6-8% RHA, which indicated that a little potential of using 68% RHA shows a considerable improvement in the strength characteristics of the soil.

Laboratory Procedure to Obtain Well-Mixed Soil Binder Samples of Medium Stiff to Stiff Expansive Clayey Soil for Deep Soil Mixing Simulation

Abstract: This paper presents a laboratory procedure to prepare well-mixed soil binder samples for simulation of deep soil mixing to stabilize medium stiff to stiff expansive clayey soils. Two natural clays were selected, and stabilized with lime, cement, and combinations of both at various proportions and dosages. Results obtained from tests conducted on identical specimens showed that the current soil-binder mixing and specimen preparation procedures have yielded homogenous and uniform treated clayey specimens. Engineering properties measured on the treated soil specimens were analyzed and ranked to arrive at the optimum binder dosages for field implementation. Concurrent mineralogical studies on selected specimens using X-ray diffraction and scanning electron micrograph studies revealed the presence of pozzalonic compounds and interwoven threads in the treated samples indicative of the mixing and stabilizing phenomenon. The recommended chemical dosages were later implemented in a field deep mixing study to construct two test pads. Several in situ wet grab samples were collected from the treated ground and were subjected to strength and stiffness tests in the laboratory. Comparisons between test results from field cores and laboratory fabricated specimens showed a good match suggesting that the formulated test protocol has provided a reasonable simulation of the DM process.

Using waste glass powder for stabilizing high-plasticity clay in Erbil city-Iraq

Abstract: Soil is a material most used in the field of civil engineering. High-plasticity clay (CH) in some parts of the Kurdistan Region of Iraq, as well as globally, causes noticeable damage to buildings a...

Cement stabilization and clay soils, with examples

Abstract: Clay soils often present difficulties in construction operations, although their engineering properties can be enhanced by the addition of small percentages, by weight, of cement. This produces an improved construction material that can be used for construction purposes. Nonetheless, the properties of the soil-cement are affected by the type of minerals present in deposits of clay. Kaolinite appears to have little effect on the hydration process and hardening proceeds normally. Clay minerals which possess an expansive lattice, notably montmorillonite, have a significant influence on the hardening of cement. As the range of mineralogy of clay deposits varies enormously, three of the most important components in clay soils, namely kaolinite, montmorillonite and quartz, were combined to give artificial clay soils in which one mineral type was dominant. In this way, the influence of these minerals on cement stabilization could be assessed. The engineering properties of such 'soils' were assessed and compared with the same properties when the 'soils' were treated with small amounts of cement.