The production of Brick block for the Acoustics Absorption Wall by mixing Cement’s Bags and Concrete
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Urban noise pollution, in the present, has rapidly grown to be the most serious problem of our society. The study is to the noise absorption efficiency the Cement’s Bags materials mixed with concrete. Three variables; mixing materials, water cement and sand ratio (W/C/S ratio) and thickness of sample brick, were predominantly considered in this study. The W/C/S were 0.5, 0.6, 0.7, and 0.8, while the thickness of sample plates were 7, 9, and 14 cm. Noise measurement, in terms of Sound Absorption Coefficient (α), Noise Reduction Coefficient (NRC) and Transmission Loss (TL), were conducted to all 437sample brick in the certain room. The results shown that NRC of Cement’s Bags and Concrete, which are 0.4-0.7, Types of mixing material and W/C/S have significantly effected on Noise Absorption Efficiency. Mixing the Cement’s Bags by the concrete mixing machine is as efficient as mixing by the process of Putzmeister Concentric Spray gun.