### PENGARUH PENAMBAHAN PASIR TERHADAP KUAT TEKAN DAN POROSITAS BETON POROUS

#### Sari

*ABSTRACT*

*Porous** concrete consist**s** **of** Portland cement, coarse aggregate, little or no fine aggregate, admixtures, and water. Porous concrete ha**s** **high** pore volume, which result**s** **lower** compressive strength. To increase the compressive strength of porous concrete is done **by add the** sand into the mixture to reduce the pore volume to some extent. Based on** these issues,** the** **research on** the effect of the addition of sand to the compressive strength and porosity of porous concrete** was** **done**.*

*Cement**-**coarse aggregate weight ratio**s** **used in** this study were 1: 5 and 1: 6, and the water-cement ratio**s** **(**wcr)** were** **0.3** and 0.4. Chemical admixtures used are SicaCim Concrete Additive, with a dose 7.5 ml / kg of cement. There were 3 specimens of each variation and the total of specimens were 36. The samples used in this research were concretes cylinder 150 mm x 300 mm. Compressive strength and porosity of porous concrete testing was carried out after 28 days age. *

*From** the results** of this research**, it** can be concluded that the addition of sand **will** decrease in** slump value. Slump value of the mixture with water cement ratio of 0.3 is smaller than 0.4, and cement-coarse aggregate ratio 1: 5 is greater than 1: 6. The addition of sand **will** increase in** compressive strength of porous concrete. Compressive strength of porous concrete with water cement ratio of 0.3 is greater than 0.4, and cement-coarse aggregate ratio 1: 5 is greater than 1: 6. The addition of sand **will** **decrease** porosity. Porosity of porous concrete with water cement ratio 0.3 is greater than 0.4, and cement-coarse aggregate ratio 1: 5 is smaller than 1: 6. The addition of sand **will** **increase** density of porous concrete.*

*Keywords: addition of sand, compressive strength, porous concrete, porosity.*

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DAFTAR PUSTAKA

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