Kissya, Maikel (2022) Pengaruh Faktor Air Semen Dan Gradasi Pasir Terhadap Kuat Tekan Mortar Beton Mutu Tinggi dengan Bahan Filler Material Kuarsa. Undergraduate thesis, Fakultas Teknik Universitas Merdeka Malang.

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Abstract

Concrete used in construction is currently required to be a concrete material that must be of high quality so that it is generally made with a higher amount of cement and of course it will have a huge impact on the surrounding environment. Therefore, researchers want to find a solution to make environmentally friendly high-strength concrete with quartz as a filler material. The manufacture of high-quality concrete mortar made from quartz filler material made with variations in water cement and sand gradation factors aims to determine how much influence the water cement factor and sand gradation have on the compressive strength of high-quality concrete mortar.

The test object used is a mortar with a size of 5x5x5 cm and will be tested for compressive strength at the age of 28 days. There are 75 test objects which are divided into 4 populations. Variations in the water-cement factor used were 0.35, 0. 4, and 0.45 while the variations in the sand gradation used were zone 1, zone 2, zone 3 and zone 4 with a 10% quartz filler content. The compressive strength test of concrete mortar was carried out using a Compressive Strength of Hydraulic Cement Mortar based on ASTM Cl09 standard.

The results showed that the use of water cement factor 0.35 with gradation zone 4 (fine sand) had the highest compressive strength of 64.17 MP a with the use of a quartz filler content of 10%. While the lowest compressive strength is found in
the use of water cement factor of0.45 with a gradation of zone 3 (slightly fine sand)
which is 35. 71 MPa. So it can be concluded that the lower the cement water factor
and the smoother the use of an aggregate, the higher the compressive strength.

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