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Expansive soils are unsaturated clayed soils that exhibit considerable volume change swelling and shrinking, under moisture content fluctuations. Volume changes of these soils can cause damages on structures resting on them. For transportation and other structures, these kinds of soils cannot be reliable. It is important to stabilize the expansive soil, where they are anticipated and proper preparation of the site before construction begins can significantly reduce the tendency of soil to swell when wet. This paper presents the study of the stabilization of expansive soil by using various percentages of fly-ash. Soil sample is taken from 3ft depth of open pit at Ywezu Village, Patheingyi Township, Mandalay. Fly ash samples are taken from Tiger Head cement factory. Soil sample is classified by Unified Soil Classification System (USCS). For making soil stabilization, the knowledge of the characteristics and engineering properties of soils are essentials. Therefore, the existence of expansive soil at the proposed construction site is to be identified by using laboratory tests such as grain size analysis, Atterberg?s limit tests, specific gravity test, and free swell test etc. The strength of the road formation layers is based on California Bearing Ratio (CBR) value. In this study, the CBR test is done by the optimum moisture content gained from the compaction test. After that the CBR tests are frequently done by various fly-ash content and moisture content to get optimum fly-ash and moisture ratio which gives the maximum CBR value. From the test results, 17.8% of water content and 16% of fly-ash give the maximum CBR value. The CBR value of the ordinary soil sample is about 2.05 (poor condition) and that of fly-ash stabilized mixture is 31.5 (good condition) and the stabilized soil can be used as base or sub-base in road construction.
expansive soil, USCS, stabilization, fly ash, CBR
SWAE NI THAN , DR. THIHA ZAW "Study On Stabilization Of Expansive Soil With Fly-ash" Iconic Research And Engineering Journals Volume 3 Issue 1 2019 Page 395-399
SWAE NI THAN , DR. THIHA ZAW "Study On Stabilization Of Expansive Soil With Fly-ash" Iconic Research And Engineering Journals, 3(1)