Contribution of coal waste as a partial substitutional material for cement for increasing concrete compression strength

Ashad, Hanafi (2023) Contribution of coal waste as a partial substitutional material for cement for increasing concrete compression strength. International Journal of Multidisciplinary Research and Growth Evaluation, 4 (1). pp. 113-118. ISSN 2582-7138

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Abstract

Concrete is the most widely used building material in construction. Starting from buildings, roads, bridges, and other construction work that uses concrete as a basic material in its construction. In general, concrete consists of a mixture of water, cement, fine aggregate and coarse aggregate. The purpose of this study was to measure the effect of coal waste as a substitute for cement on increasing the compressive strength of concrete. In this study, the method used is laboratory-based research. The initial stage of the research was in the form of material inspection including inspection or testing of coarse and fine aggregate materials, after the inspection of the materials was carried out and met the standard requirements, then proceed with making a job mix design. In this study, researchers used fly ash as a partial substitution for cement. The specimen will be tested by compressive strength test. The test object used is cylindrical in shape. The use of fly ash is 0%, 5%, 10%, 15%, 20% and 25% of the amount of cement. The test was carried out when the concrete was 28 days old for the compressive strength test. The contribution of coal fly ash to compressive strength made a positive contribution to the addition of coal fly ash up to 12.49%, there was an increase in compressive strength, whereas an addition above 12.49% resulted in a decrease in compressive strength. The optimal percentage obtained is 12.49% resulting in a concrete compressive strength of 35.59 MPa.Concrete is the most widely used building material in construction. Starting from buildings, roads, bridges, and other construction work that uses concrete as a basic material in its construction. In general, concrete consists of a mixture of water, cement, fine aggregate and coarse aggregate. The purpose of this study was to measure the effect of coal waste as a substitute for cement on increasing the compressive strength of concrete. In this study, the method used is laboratory-based research. The initial stage of the research was in the form of material inspection including inspection or testing of coarse and fine aggregate materials, after the inspection of the materials was carried out and met the standard requirements, then proceed with making a job mix design. In this study, researchers used fly ash as a partial substitution for cement. The specimen will be tested by compressive strength test. The test object used is cylindrical in shape. The use of fly ash is 0%, 5%, 10%, 15%, 20% and 25% of the amount of cement. The test was carried out when the concrete was 28 days old for the compressive strength test. The contribution of coal fly ash to compressive strength made a positive contribution to the addition of coal fly ash up to 12.49%, there was an increase in compressive strength, whereas an addition above 12.49% resulted in a decrease in compressive strength. The optimal percentage obtained is 12.49% resulting in a concrete compressive strength of 35.59 MPa.

Item Type:	Article
Subjects:	T Technology > T Technology (General)
Divisions:	FAKULTAS TEKNIK
Depositing User:	Unnamed user with email admin@umi.ac.id
Date Deposited:	03 Jul 2023 00:47
Last Modified:	03 Jul 2023 00:47
URI:	http://repository.umi.ac.id/id/eprint/2895

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