Optimization of Compressive Strength of Paving Blocks with Variations in Aggregate and Cement Mixtures

Irwan; Syatir Suaib; Rini Rahni Putri

doi:10.55927/modern.v4i6.12

Authors

Irwan State Agricultural Polytechnic of Pangkajene Islands
Syatir Suaib State Agricultural Polytechnic of Pangkajene Islands
Rini Rahni Putri State Agricultural Polytechnic of Pangkajene Islands

DOI:

https://doi.org/10.55927/modern.v4i6.12

Keywords:

Aggregate, Compressive Strength, Quality, Paving Block

Abstract

To improve quality and cost efficiency, it is necessary to study the effect of varying aggregate and cement mixtures in paving block production. This research aims to determine the influence of different aggregate–cement mix ratios on the compressive strength and overall quality of paving blocks and to identify an optimal mix that meets the compressive strength requirements of the Indonesian National Standard (SNI) while still being economically feasible. This laboratory experimental study used five mixture variations with cement-to-aggregate ratios of 1:1, 1:2, 1:3, 1:4, and 1:5. Paving block specimens were cast and then cured for 28 days. After curing, each specimen was weighed and tested for compressive strength using a compression testing machine. The results show that the cement content has a significant effect on compressive strength. Cement acts as a binder that holds aggregate particles such as sand and stone dust together through the hydration process. The higher the cement content, the denser and stronger the bond between particles, resulting in higher compressive strength. However, the mixture with a 1:5 cement-to-aggregate ratio did not meet the SNI compressive strength requirements. On the other hand, excessive cement content is also not ideal, as it increases production costs and may lead to problems such as shrinkage and microcracking

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