GREEN TECHNOLOGY THROUGH POROUS CONCRETE
This research uses stone ash waste from the stone crusher industry to preserve the environment. This material is an ingredient in making normal concrete. The use of stone ash as a substitute for sand is expected to increase the compressive strength in the planned slump and can optimize the use of rock ash waste to reduce environmental pollution that occurs. This study uses an experimental method with a total of 32 pieces of specimens. Each variation consists of 3 samples with a variety of fine aggregate levels of 40%, 44%, and 46%. The test object is a concrete cylinder with a diameter of 15 cm and a height of 30 cm. Test results for compressive strength at seven days for fine aggregate content variations of 40%: 22.25 Mpa; 44%: 24.30 Mpa; 46%: 17.08 MPa. Test results of compressive strength at the age of 14 days for variations in fine aggregate levels of 40%: 26.10 Mpa; 44%: 28.51 Mpa; 46%: 20.04 Mpa. Test results of compressive strength at the age of 21 days for fine aggregate content variations of 40%: 28.18 Mpa; 44%: 30.78 Mpa; 46%: 21.63 MPa. With these results, the Porous concrete produced can be used as preservation and maintain environmental protection. This product very cheap when compared to the original concrete, which calculated 22 U$ per square. The use of porous concrete has an impact on people's behavior that will preserve the environment, especially water content in the soil.
Alhabeeb, M.J. (2019). Price Discrimination as a Marketing Strategy. International Journal of Marketing Studies, 11(4), 1-15.
Hardagung, H.T., Sambowo, K.A., & Gunawan, P. 2014. Study of slump value, compressive strength and modulus of concrete elasticity with additives of ash stone paras filler. Matriks Teknik Sipil, 2(2), 131-137. (translated from Indonesia: Kajian nilai slump, kuat tekan dan modulus elastisitas beton dengan bahan tambahan filler abu batu paras. Matriks Teknik Sipil, 2(2), 131-137).
National Standardization Agency in Indonesia. (1992). Quality and how to concrete aggregate test. SNI 03-1750-1990. (translated from Indonesia: Agregat beton, Mutu dan cara uji. SNI 03-1750-1990).
National Standarization Agency in Indonesia. (2000). Procedure for making normal concrete mixed plans. SNI 03-2834-2000. (translated from Indonesia: Tata cara pembuatan rencana campuran beton normal. SNI 03-2834-2000).
Widodo, S., Sentosa, A., & Pusoko, P. (2003). Utilization of ash stone waste as fillers in the production of self-compacting concrete. Jurnal Ilmiah Fakultas Teknik Universitas Negeri Yogyakarta. Yogyakarta. (translated from Indonesia: Pemanfaatan Limbah Abu Batu Sebagai Bahan Pengisi Dalam Produksi Self-Compacting Concrete. Jurnal Ilmiah Fakultas Teknik Universitas Negeri Yogyakarta. Yogyakarta.
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