ABSTRACT
Foamed concrete is a lightweight concrete innovation that utilizes foam materials to be added to concrete mixtures aimed at reducing the concrete’s density. This research uses foam percentage of 30%, 40%, 50%, and 60% of the total mixture’s volume. The percentage of fly ash substitution by 0%, 10%, 15%, and 20% of the total weight of cement. The purpose of this research is to analyze the effect of foam and fly ash percentage on the properties of foamed concrete. Tests include slump flow, setting time, density, and compressive strength. The maximum value of slump flow test result is on 30V-20FA mixture at 69.50 cm. The result of time setting test shows the fastest initial setting time and final setting time are 275 minutes and 600 minutes on 30V-0FA mixture. Meanwhile, the slowest initial setting time and final setting time are 405 minutes and 790 minutes on 50V-20FA. The lowest density is 901.27 kg/m3 on 60V-20FA mixture meanwhile the highest density value is 1,487.90 kg/m3. The optimum compressive strength value is 8.57 MPa on 30V-10FA mixture with 10% of fly ash percentage.
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