Open Conference Systems, 2nd International Youth Conference on Engineering Innovation

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The Effect of Calcium Carbonate Precipitation using Ureolytic Bacteria for Improving Compressive Strength of Recycled Aggregate Pervious Concrete
Rizki Perdana Putra Husnan, Eva Arifi, Evi Nur Cahya, Irfan Mustafa, Fahima Ellya Wulandari, Nabila Rachma Aulia

Last modified: 2022-12-01

Abstract


Rapid construction development requires excessively raw materials consumption and generate more construction waste. Natural aggregate usage can be reduced by using concrete waste as an alternative. Recycled coarse aggregate has lower quality compares to natural aggregate due to its pores which lead to higher water absorption. Recycled coarse aggregate quality can be enhanced by using biodeposition method that precipitate calcium carbonate into aggregate using ureolytic bacteria that fill its pores. In this research, pervious concrete made from recycled coarse aggregate. The recycled aggregate used was first immersed in solution of ureolytic bacteria for 14 days to ensure precipitation of calcium carbonate filling its pores. S17 and R20 were two types of ureolytic bacteria used in the experiment. Natural aggregate pervious concrete was also used as control specimen. The result show that compressive strength of recycled aggregate pervious concrete increased compared to recycled aggregate pervious concrete without the utilization of ureolytic bacteria. However, R20 ureolytic bacteria achieved higher compression strength compared to S17.

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