Bude, Maria Margaretha (2022) Pengaruh Faktor Air Semen dan Kadar Filler Material Batu Apung Terhadap Kuat Tekan Mortar Beton Mutu Tinggi. Undergraduate thesis, Fakultas Teknik Universitas Merdeka Malang.

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Abstract

The increasing use of concrete absorbs the increasing use of cement. Darma Adi S, et al (2008), reported that the increasing cement production has a bad impact on the surrounding environment in the form of air pollution, environmental pollution and ecosystem decline. Therefore, alternative added materials are needed that can be used in the manufacture of concrete without compromising the quality of the concrete itself, and can even improve the quality or quality of concrete. The manufacture of high-quality concrete mortar with pumice filler added material and fas variations and filler content variations aims to determine the effect of fas variations with filler levels on the compressive strength of high-quality concrete with pumice fillers.

In this study, concrete compressive strength testing was carried out on a cube test object measuring 5 x 5 x 5 cm. The test was carried out after the concrete was 28 days old. The cement water phase variation used is 0.35, 0.4, and 0.45 while the variation in the filler content of pumice used is 5%, 10%, 15% and 20%. The test items numbered 75 pieces and were divided into 4 populations. Concrete compressive strength testing is carried out using a compression testing machine based on ASTM C94 standards.

The results showed that concrete mortar test objects with the influence of fas variations of 0.35, zone 2 sand gradations and 15% pumice filler content had the highest average compressive strength of 72.50 Mpa. While the normal concrete test object without filler has the highest average compressive strength of 71.454 Mpa using fas 0.35 and zone 2 sand gradation. So it can be concluded that in this study the cement water phase (FAS) 0.35 and the gradation of zone 2 sand have the highest compressive strength value of high quality concrete.

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