Abstract
Pervious concrete with marble and gravel substitution shows low compressive strength. In another attempt the experiments carried out by adding fly ash as much as 20% of the weight of cement showed an optimal strength. This research aims to increase the compressive strength of pervious concrete by modify coarse aggregate proportions and adding fly ash admixture. Method that used is experimental with 4 variations aggregate size mixture. Type 1 are aggregate variation size of 2 cm, 1,5 cm, and 1 cm, type 2 are aggregate variation size of 2 cm and 1,5 cm, type 3 are aggregate variations size of 2 cm and 1 cm, and type 4 aggregate size 2 cm. Tests are on permeability test and concrete compressive strength test on age 3 days, 7 days, 14 days, 28 days. Permeability test results based on type of variations aggregate size respectively are 0,750 cm/sec, 0,737 cm/sec, 0,647 cm/sec, and 0,840 cm/sec. The results of the compressive strength test on all type at 28 days respectively are 8,008 MPa, 9,879 MPa, 11,542 MPa, and 8,357 MPa. Results of research on variations in the mixture, the maximum compressive strength is variations of coarse aggregate size 2 cm and 1 cm.
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