CD Skripsi
PENGARUH PENGGUNAAN FLY ASH DAN SEMEN REDISPERSIBLE POLYMER POWDER TERHADAP SIFAT MEKANIK BATA RINGAN
Lightweight bricks are a mixture of cement, sand, water, and foam agent used as
building materials for walls due to their lower density compared to conventional
concrete bricks. This can reduce the structural load on multi-story buildings.
However, the brittle nature of lightweight bricks results in low compressive
strength. The addition of fly ash, which has pozzolanic properties, can strengthen
these lightweight bricks. The purpose of this research is to determine the optimal
mechanical properties of lightweight bricks using fly ash and Redispersible
Polymer Powder (RPP) cement. In this study, tests were conducted on two types of
cement to compare their compressive strength values. The research was carried out
with variations of fly ash SN, SP, 5%, and 10% of the cement weight on cube-shaped
test specimens with a size of 10 cm. Compressive strength testing was conducted
over periods of 14 and 28 days, while surface settlement testing was carried out on
the specimens at the age of 28 days. The results obtained included the compressive
strength and surface settlement of the specimens. Based on the average compressive
strength results with variations of fly ash SN, 5%, 10% with Portland cement at 28
days, the values were 0.632 MPa, 0.780 MPa, and 0.554 MPa, respectively.
Meanwhile, mixtures of fly ash SP, 5%, 10% with RPP cement had compressive
strength values of 0.670 MPa, 0.902 MPa, and 0.676 MPa, respectively. It can be
concluded that the optimum compressive strength was found in the mixture with the
addition of 5% fly ash and the use of RPP cement with a value of 0.902 MPa and a
maximum settlement of 7.20 mm. Therefore, the optimum compressive strength is
found in the mixture with 5% fly ash, using either Portland cement or RPP cement
Keywords : Lightweight bricks, Fly ash, Redispersible polymer powder , Compressive
strength, Settlement.
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