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ABSTRACT:
In this paper an attempt is carry out to find the effectiveness of Nylon fiber stabilizer in black cotton soil which is important to make utilization of the fly ash in construction of roads by improving its compaction characteristics by mixing it with different fine grained soils viz. black cotton soil. It aims to study the change of geotechnical properties of black cotton soil by stabilizing with Nylon Fiber, lime and Fly Ash. The study of quantitative change in CBR values with different sizes and proportion of Nylon Fiber. It also reveals about the impact of Nylon Fiber on various engineering properties of soil mix with fly ash.
KEY WORDS: Nylon Fiber, Lime, Fly ash, Soil Stabilization.
INTRODUCTION:
Expansive soil causes serious problem on civil engineering structures due to its tendency of swelling when it is in contact with water and shrinks when they dry out. Soil stabilization using chemical admixtures is the oldest and popular method of ground improvement. In this study, the potential of marble dust (by-product of marble industry) as stabilizing additive to expansive soil is evaluated. The evaluation involves the determination of the swelling potential of expansive soil in its natural state as well as when mixed with varying proportion of marble dust (from 0 to 30%). The marble dust in experimental program is obtained from cutting of Makrana marble. The environmental degradation due to marble mining is much less than the environmental degradation caused by the waste from marble processing plants.
Many researchers have reported that marble has very high lime (CaO) content up to 55% by weight. Thus, stabilization characteristics of Makrana marble dust are mainly due to its high lime content. Marble dust finds bulk utilization in roads, embankment and soil treatment for foundation. Particle size distribution, consistency limits, specific gravity, swelling percentage, and rate of swell were determined for the samples. Addition of marble dust decreases liquid limit, plasticity index and shrinkage index, increase plastic limit and shrinkage limit.
Fly ash is a fine, glass powder recovered from the gases of burning coal during the production of electricity. These micron-sized earth elements consist primarily of silica, alumina and iron. When mixed with lime and water the fly ash forms a cementitious compound with properties very...