Compressive strength of pervious concrete paving blocks for pavement with the addition of fly ash

Abstract

Pervious concrete paving blocks (PCPB) is a material that widely used for the surface layer of road either for traffic or non-traffic needs. The main characteristic is the pores within the concrete which can allow water to pass through so it can prevent inundation when rain comes. Good absorption rate is not in line with its compressive strength. In order to enhance its compressive strength, some fly ash was added to the weight of the cement in the mixture. Fly ash (FA) is a coal combustion residue that has similarity with cement content and properties. Admixture for pervious concrete typed SikaMix-10 NT were added to increase the workability of the mixture. This research uses quantitative methods based on the results of experiments conducted in the laboratory. The planning of mixture refers to the ACI 522R-10 standard. Several tests were carried out to determine the quality such as compressive strength test, infiltration test, porosity test and wear resistance by analysing the results guided by SNI 03-0691-1996. The results generally showed that the addition of some fly ash was made to have compressive strength, absorption, porosity and wear resistance that has fulfilled C classification for application in pedestrian paths or sidewalks.