Influence of mix proportions on pervious concrete used in pavements

الملخص EN

In this research, the effect of using different water-cement ratios (w/c = 0.33, 0.35, and 0.4), different aggregate sizes (MAS = 40, 20, 14, 10 and 5.0) mm., adding different ratios of sand (5, 10, and 20)%, as well as, compaction on the strength and permeability of pervious concrete were studied.

Test results indicated that, the best w/c ratio was 0.33 for MAS = 40, 20 and 14 mm., while the best w/c ratios were 0.35 and 0.4 for MAS = 10 mm.

and 5.0 mm.

respectively.

In this research we considered a control mix (C:A = 1:6, w/c = 0.35 and MAS = 10 mm permeability = 2 sec) as the optimum mix proportions which it was obtained by trial mixes.

It was clear that the best sand ratio was (10%).

Results also indicated that, when adding 0.5% super-plastizer of cement weight, increase compressive strength.

Finally adding sand with super-plastizer increase compressive strength but reduce permeability.