Performance of Pervious Concrete as A Replacement for Road Curb

Pervious concrete is a well-known type of concrete characterized by its high porosity and permeability. It finds extensive use in road infrastructure, particularly in pavement construction, and offers cost-saving benefits due to the absence of fine aggregates in its mixture. While road curbs are still commonly built today, the utilization of pervious concrete as a substitute for curbs is rarely observed. Therefore, this study focuses on evaluating the compressive strength, flexural strength, and suitability of pervious concrete as a curb replacement. In this investigation, different water cement ratios (0.30, 0.33, 0.35, 0.38, and 0.40) were employed during the mixing of pervious concrete to determine the most optimal ratio and achieve the highest compressive and flexural strength for the road curb. To obtain the results, compressive and flexural tests were conducted on ten curb samples after a curing period of 28 days. The study aimed to examine the diverse effects of the various water cement ratios. The findings indicate a decrease in compressive stress as the water cement ratio increased. Furthermore, the compressive strength of the concrete mix was significantly stronger at a water cement ratio of 0.30 but exhibited a decline with higher ratios. Similar results were obtained in the flexural test, where a water cement ratio of 0.30 recorded the highest value of flexural strength. However, a water cement ratio of 0.40 yielded the second-highest flexural strength. These results emphasize that a lower water cement ratio leads to higher concrete strength. To further enhance the strength of the concrete, several recommendations are proposed, including the use of coating reinforcement bars, adjustment of coarse aggregate size, and the addition of admixtures to the pervious concrete mixture. © Published under licence by IOP Publishing Ltd.