Pemanfaatan Tailing Bauksit Sebagai Bahan Campuran Pengganti Pasir Pada Pembuatan Paving Block
Bauxite tailing is a by product of bauxite washing. The amount of waste from the bauxite tailings
can reach about 50% of the dry weight of the bauxite before washed. The increasing demand for
bauxite causes the amount of exhaust produced to be even greater. This risks causing environmental
pollution problems requiring an alternative treatment and one of the solutions is utilize the bauxite
tailings as a mixture of sand substitutes in the manufacture of paving blocks. The role of sand is
replaced by a 50% increase in market price so that in this study a compressive strength test will be
conducted on the strength of paving blocks with sand mixture (as sold in the market) with paving
blocks with bauxite tailings mixed then comparison. This utilization is to minimize the
environmental impacts, to reduce the accumulation of materials at the washing site, and in the
future can be increasing value products that become business opportunities for affected
communities due to bauxite mining. Based on the research, there is a found the average value of
uniaxial compressive strength of sampel 50% : 50% is 17.19 Mpa. That is smaller than the value of
uniaxial compressive strength of sampel 60% : 40%, 17.62 MPa. The meaning of compressive
strength value of the sample is 60%: 40% more optimal than the sample with the ratio 50%: 50%
because the value of compressive strength is included in SNI-03-0691-1996 ie on the quality of B.
Keywords : Bauxite Tailing, Paving Block, Uniaxial Compressive StrengthTest (UCS)
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