Buku Teknik Sipil4/2/2023 The specimens used were cylinders with diameter 15 cm, H = 30 cm with total 24 pieces. The planned concrete quality of K-250 with Water Cement Ratio (FAS) is 0.60. The aggregate used is crushed stone with a maximum aggregate diameter of 25 mm. The research was conducted by laboratory experimental method to get the data followed by analysis to obtain the result of compressive strength. The benefits of this research can reduce the environmental impact on plastic bottles used as concrete mixtures. The purpose of this research is to know the influence of the use of plastic material as a substitute of sand to the compressive strength of concrete. The plastic bottle is further processed in certain way that it becomes fiber. The existence of this material used as a substitute for sand into a concrete mixture. The waste of used plastic bottles is the material that is widely found in the environment as waste of drinking water.
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