Pemanfaatan Limbah Abu Tongkol Jagung dan Bottom Ash Sebagai Bahan Campuran Pembuatan Paving Block

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Tri Yuhanah
Rani Aqidatul Afirul

Abstract

Paving block is a building material that is commonly used by the public, especially in parking lots, yards, sidewalks and other outdoor areas. The quality of paving blocks must meet the requirements according to their use, depending on the material for making the paving blocks. One of them is by utilizing the residue from the tofu factory combustion in the form of cob ash waste corn (ATJ) and coal combustion residue (bottom ash). In this study, corn cob ash was used as a cement substitute and bottom ash as a sand substitute. The ratio of materials for making paving blocks is 1 (cement): 4 (sand). The purpose of this study was to determine the value of compressive strength, water absorption and the optimum composition of substitution material for corn cob ash and bottom ash in paving blocks. Corncob ash waste used in the mixture of paving block materials is 5% ATJ waste and variations in bottom ash mixture of 0%, 10%, 20%, and 30%. The compressive strength test was carried out at the age of 7 days, 14 days and 28 days and the water absorption test was carried out at the age of 28 days. From the results of the research, the compressive strength values ??were respectively 18 MPa, 20.58 MPa, 23.25 MPa, 22.17 MPa, and 20.08 MPa. The percentages of absorption are 5.91%, 5.53%, 6.57%, 7.42 % and 8.23%, respectively. Based on SNI 03-0691-1996, the paving blocks produced in this study include B quality which can be used for parking lots.

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