Studies on the role of biochar granite dust and polyacrylamide as partial cement replacers in pervious concrete properties

Abstract

Recently many places especially metropolitan cities face severe newlineissue of water-logging and flash flooding. Untimely precipitation caused by newlineglobal climatic change and increase in paved surfaces caused by population newlineexplosion and urbanization serve as primary reason for this issue. Occurrence newlineof such flash floods results in erosion of downstream soil and paved surfaces newlinewhich ultimately results in contamination of surface and ground water newlineresources. In addition, rain water tends to be acid rain sometimes thereby newlineincreasing the contamination level. Flash flooding also causes wastage of rain newlinewater to a larger extent resulting in a water deficit ecosystem during summer newlinein many cities which has turned out to be another serious issue as the whole newlineworld depends on potable water for their daily living. In addition, sudden newlineflash floods tend to cause severe monetary loss as well as loss of human life. newlineAll these issues have resulted in usage of pervious concrete in many places newlineespecially pavements in the past few decades.The term Pervious Concrete denotes concrete with a little or no fine aggregates. Owing to the absence of fine aggregate, this type of concrete tends to be porous and hence it finds its application in pavements. With the increase in porosity of pavements, water from surface run-off tends to newlinepenetrate and reach the ground water level. This reduces the flash flooding newlineand surface erosion problem thereby preventing human life loss and newlinecontamination of water resources as well. Furthermore, usage of pervious newlineconcrete in pavements helps to reduce vehicular noise, enhance tyre friction newlinethereby reducing the possibility of occurrence of accidents, reduce urban heat newlineisland effect and enhancement of rainwater purification. newline newline