An overview on the performance of nano silica materials on the properties of porous concrete pavement

Abstract

Porous concrete technology has been used since 1970s in various parts of the United States as an option in complex drainage systems and water retention areas. Porous concrete pavements have become popular as an effective stormwater management device to control stormwater runoff in pavement. Porous concrete pavement is being used as one of the solutions to decrease the stormwater runoff by capturing and allowing rainwater to drain into the land surface. The main problem of porous concrete pavement is its strength. The objective of this paper is to review the use and performance of nano silica in porous concrete pavement and previous laboratory study on porous concrete pavement. From the literature review, it was found that the conventional porous concrete pavement does not have good strength for pavement purpose. An addition of nano-material will improve the physical and chemical properties of porous concrete pavement. To improve the strength of the porous concrete, various additives have been studied as a part of porous concrete mix and yet, the optimum condition to produce good porous concrete has still not been established. From the previous study, it was found that in preparing the porous concrete laboratory specimen, the use of standard Proctor hammer (2.5 kg) and pneumatic press (70 kPa compaction effort) resulted in the closest properties to the field porous concrete.