Abstract
Construction activities on peat soils are found to be extremely difficult as the soil is profound as soft soil and has low shear strength and high moisture content. Due to alternating swelling and shrinkage nature, it causes serious damage to the structure above it. This happens due to repetition of drying and wetting of soil. Stabilization of soil is commonly applied to improve the mechanical properties of soil prior to soil engineering works. This soil improvement method is advantageous and effective one by using waste materials. Waste in our country is divided in various types and it includes domestic wastes, industrial wasters, agricultural wastes etc. Because of difficulties to diminish these wastes without affect to environment and surroundings, it can be used as a stabilizing agent in the soil. Therefore, this experimental study carried out to evaluate the effect of Rice Husk Ash (RHA) and sawdust on engineering properties of the peat soil. The properties such as compaction and unconfined compressive strength are determined separately with sawdust and added of RHA in peat soil at a variety of percentages (2.5%, 5% etc.) in addition small amount of constant rate of lime with 2% of the dry soil weight. By obtaining the results, it can deduce a promising and improving result in stabilizing the soil with sawdust and Rice Husk Ash in both economic and strength capacity. This will not only solve the waste disposal problem but also enhance the strength characteristics of soil significantly.
Highlights
Peat is a blend of broke down natural material shaped in a damp condition which arrives under adjusted climatic and topographic conditions This organic soil contains a mixture of decomposed plant materials and animal or it contains about. 75% organic matter
This study examined of peat soil and their reactions towards sawdust, rice husk ash and hydrated lime as a mixture
The peat soils were acquired from Jalan Sungai Panjang, Sungai Panjang, Sungai Besar, Selangor, Malaysia which the undisturbed samples were collected by using tube sampler at 0.5m depth and sealed with plastic sealer
Summary
Peat is a blend of broke down natural material shaped in a damp condition which arrives under adjusted climatic and topographic conditions This organic soil contains a mixture of decomposed plant materials and animal or it contains about. 75% organic matter. Rice husk ash (RHA) and hydrated lime was chosen where these materials are generated from the waste of industries and agricultural areas. Both materials can be used to stabilize the soil and avoid the problem to construction especially when the project is constructed on peat area. This study examined of peat soil and their reactions towards sawdust, rice husk ash and hydrated lime as a mixture. The physical properties of peat soil and treated soil with the variation amount of sawdust, rice husk ash and constant amount of hydrated lime were determined. The UCT were used to evaluate the compressive strength of the treated soil
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