STABILIZATION OF CLAY BY FLY ASH AND CEMENT

WIJAYA, PERDANA KUSUMAH GONDO (2010) STABILIZATION OF CLAY BY FLY ASH AND CEMENT. S1 thesis, UAJY.

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Abstract

cement, lime soil, cane pulp ash has been done. However, study of clay stabilization soil is still interesting subject to be investigated. This research investigated capability of fly ash, as a waste material, with the addition of cement as pozzolanic material, combined with clay soil, to increase the shear strength and cohession of these clay. The research was divided into 2 steps of test. The first was to find the OMC (Optimum Moisture Content) condition of clay. This step covered clay characteristics test (water content test) and standard proctor test (compaction method). The second step was Unconfined Compression test (UCS). This test was to find the optimum shear strength and cohession of clay that was stabilized with fly ash and cement. The percentage of cement which added were 0%, 8%, 12%, and 16%; and the percentage of fly ash which added were: 0%; 12%, 24%, and 36%. The results of the research were: clay reach the optimum moisture content when added with 901.54 ml of water, and reach the optimum shear strength and cohession when added with cement as much as 8% of percent and fly ash as much as 12% of percent. Addition of cement and fly ash above that percentages were useless. Another results were shear strength and cohession reach the optimum value on 14th day of curing time rather than 1st day and 7th days of curing times.

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