Pemanfaatan Abu Fiber Sawit Pada Campuran Paving Block Sebagai Subtitusi Semen Terhadap Kuat Tekan

Alqudrisyam, Fadel Ibnu Muliya (2022) Pemanfaatan Abu Fiber Sawit Pada Campuran Paving Block Sebagai Subtitusi Semen Terhadap Kuat Tekan. Other thesis, Universitas Islam Riau.

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Abstract

Paving block is a building material used as the top layer of the road structure other than asphalt or concrete. Installation of paving blocks that leaves a gap between one paving block and another so that it is able to pass water as much as 30%-50%, and can maintain the availability of ground water. Based on research conducted by UPT. The Diponegoro University Laboratory contains 38.1957% silica (SiO2) from palm fiber ash, which allows it to be used as a partial cement substitute. This study aims to determine the effect of using palm fiber ash as an alternative material to partially replace cement on the compressive strength and water absorption of paving blocks. This research was conducted using the compressive strength and water absorption test method based on SNI 03-0691-1996. The test object is a square with dimensions of 5 cm x 5 cm x 5 cm. Tests for compressive strength and water absorption were carried out at the age of 28 days. This study uses a mixture of cement and sand 1:4 composition. The results of the average compressive strength of paving blocks at variations of 0%, 2.5%, 5%, 7.5%, 10%, 12.5%, and 15% respectively are 141.40 kg/cm2, 148 ,20 kg/cm2, 152.28 kg/cm2, 125.08 kg/cm2, 118.29 kg/cm2, 100.61 kg/cm2, and 80.22 kg/cm2. While the results of the average water absorption of paving blocks at variations of 0%, 2.5%, 5%, 7.5%, 10%, 12.5%, and 15% respectively are 7.7%, 7 ,86%, 8.01%, 8.67%, 9.48%, 10.68% and 11.11%. The results of the compressive strength test showed that the replacement of cement with palm fiber ash above 5% of the cement volume decreased. While the results of water absorption indicate that the greater the variation in the use of palm fiber ash, the greater the absorption in paving blocks.

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