1Manoj Nallanathel, 2 Ramesh Bhaskar
1Asst. Professor- Civil Engineering, Saveetha School of Engineering, Saveetha University, Chennai.
2Professor and Head – Civil Engineering, Saveetha School of Engineering , Saveetha University, Chennai
Abstract— Pervious concrete is that types of concrete which allow water to sip through them or in other word we can terms this concrete as a porous concrete which show high permeability and void contents as compared to normal concrete. The history of pervious concrete dates back to 1960. Pervious concrete has been used intensively in USA, Japan and some Western countries. The first experimental roads were constructed in England in 1960 which pave the way for development …show more content…
Malhotra discussed pervious concrete as it relates to applications and properties. He provided details on such properties as consistency, proportions of materials, unit weight, compatibility, and curing in an attempt to maximize permeability in the pervious concrete. Malhotra also conducted multiple experiments on various test cylinders in an attempt to find a correlation between compressive strength and any of the material’s properties. He concluded that the compressive strength of pervious concrete was dependent on the water cement ratio and the aggregate cement ratio. He also concluded that even the optimum ratios still would not provide compressive strengths comparable to conventional concrete. He found the effect of compaction on compressive strength. Pervious concrete cannot be used for the construction of roads that experience heavy traffic. The most significant problem for pervious concrete is clogging, so frequent maintenance is required. Clogging leads to a decrease in water permeability, and also causes a decrease in the advantages of using pervious concrete. Strength and permeability of pervious concrete are found to be affected by several factors including binder types, aggregate type, aggregate grading, mix combination and compaction. Even though a few researchers have reported slump values for pervious concrete, the standard slump test is not suitable for pervious concrete to assess its workability because of lightweight nature of pervious concrete was too small and hence recommended that workability for pervious concrete should be assessed by forming a ball with the hand to established mould ability of pervious concrete.Porosity for pervious concrete is ranged from 15 to 35%. Also, porosity of pervious concrete termed as void content or void ration in percentage. This high porosity leads to a high permeability for the pervious concrete.There are three different types of pores in the pervious concrete that has been discussed namely,