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Effect of Compaction Delay on Fly ash Stabilized Black cotton Soil

Publication Date : 10/07/2015

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4th International Conference on Recent Trends in Engineering & Technology(ICRTET-2015) July 2-4,2015 Organized by SNJB's KBJ College of Engineering,Chandwad,Nashik,Maharashtra,India

Abstract :

Stabilization of soil is important to enhance the strength, volume stability and durability. mixing the stabilizers with the soil and compaction of the stabilizers mix which affects the properties stabilized expansive soil. black cotton soil mixed with fly ash has been investigated. The percentage of fly ash which is used in black cotton soil varies from 0%, 20%, 30% and stabilize soil specimens were the Compaction tests (Modified Proctor), the Unconf Strength test with time delay of 0, 12, 24, 48hrs. The results obtained indicated that the density decreases with increase in compaction Keywords-Black cotton soil, Compaction sity. Increased costs associated with the use of high quality materials led to the geotechnical and highway construction. When these local soils used for these purpose it should possess engineering properties to meet the requirements like high strength, low settlement etc. In most of the co dition the soil present in the field may be problematic one such as expansive soil like black cotton soil. In India expansive soils cover about 20% of the total land area (Ranjan and Rao 2005, Shelke and Murty 2010). These soils increase in volume on absorbing water d when the water evaporates from them during dry seasons. Due to such swelling and shrinkage properties of soil causes impairment to many lightly loaded structures. Soil stabilization of black cotton soils with var additives is one of the techniques to reduce the problems possessed by expansive soils. Chemical stabil zation of black cotton soils involves additives such as lime, cement, fly ash, bitumen etc. in different pr portion. Soil stabilization has been us ties like strength and durability of black cotton soils can be improved by mixing the stabilizers with soil at required water content and then compacting the soil stabilization mix to the At the same time, fly ash is produced abundantly in coal based thermal power plant all over the world. The problem of disposal of fly ash is more vulnerable and complex, especially in India than due to high ash content in coals used (Sri regarding the use of fly ash alone or in conjunction with lime or cement for improving properties of black cotton soil in many regions around the world. But delay between mixing t compaction of the soil- stabilizers mix leads to change in both strength and density properties of the soil for fixed compactive effort. Most of the time delay is unavoidable due to any one reason of the following: sudden rainfall, delaying if compacting equipments after mixing, poor transportation etc. these makes the compaction process a delayed one. These delaying hours significantly affects the strength of stabilized soils. Hence it is necessary to study the effects of compa engineering properties of black cotton soil stabilized with fly ash. and Research e-ISSN No.:2349-9745, Date: 2 , rights Reserved Black cotton Soil S.R. JOSHI1, V.J. SHARMA MCERC, Nashik, Maharashtra, India engineering properties of expansive soil like olume During such process some unavoidable delays occurs between tabilized The present paper focuses on the effect of compaction delay on the behaviour of 50% by dry weight of soil. The tests carried out on fly ash delay.

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