ANALISIS PERFORMA BETON NORMAL DENGAN PEMANFAATAN LIMBAH BATU MARMER TERHADAP SUBSTITUSI PASIR.

Abstract

Marble stones are one of the famous mining products in Tulungagung Regency and have quite a large amount. This matter makes the marble stones produce quite a lot of waste and pollutes the environment. That, necessary wastes treatment process to reduce environmental pollution by making sands substitution in normal concrete. This research aims to know the effect of substitution marble stones to value of compressive strength and split tensile strength at variations of 0%, 10%, 20%, 30% & 40% and calculate the number of costs needed with the purpose to obtain more economical cost. The mix design of normal concrete use SNI 03-2834-2000 with quality 20 MPa. Then, to know the effect of compressive strength and tensile strength use the Anova test. Based on the result obtained the biggest average compressive strength value at 28 days old is a variation 40% by 54,07 MPa and the smallest is a variation 10% by 19,29 MPa and compressive strength that meets the margin value of the mix design is a variation of 0% of 24.37 MPa; 30% of 25.82 MPa; & 40% in the amount of 42.07 MPa. While the result for the biggest average tensile strength value at 28 days old is a variation of 40% by 3,07 MPa and the smallest is a variation of 20% by 1,49 MPa. Based on the result Anova test for compressive strength and split tensile strength can't be done. So that, used the Kruskal Wallis test and obtained results for compressive strength that marble stone wastes to affect compressive strength. While for split tensile strength declare that marble stone wastes can't affect split tensile strength. In the cost of the calculations on each variation tends to decrease with the lowest cost which is obtained in variation 40% is amount Rp 1.366.696 and save 4,30% from the cost in concrete variation 0%. Then, for financially feasible study for value NPV worth Rp 2.233.637.768 and BCR worth 1,03. So, this business stated feasible for implementation.