Strength And Abrasion Resistance Of High Volume Fly-Ash Concrete Pavements

Abstract

This paper is undertaken to evaluate the abrasion resistance and strength resistance of concrete proportioned to have five levels of cement replacements (30,35,40,45,50%) using fly ash. A reference concrete without fly ash was proportioned to have the 28-day compressive strength of 40 MPa are tested and the concrete specimens were subjected to abrasion according to the ASTM C- 944 t e s t method. In this work , all the concretes made with and without fly ash passed the abrasion resistance requirements per ASTM C-779. The fly ash makes concrete more impermeable and denser as compared to Ordinary Portland Cement. From observations the long-term strength (90 days and above) of fly ash concrete is better compared to plain concrete .The following project also gives an idea about the characteristics of skid resistance, factors affecting it and also the methods to reduce skid resistance and ultra-sonic pulse velocity test on concrete cubes and beam. The use of fly ash in concrete has received significant attention over recent years due to environmental concerns regarding its disposal and potential for use as a cementations material with its ability to provide significant benefits to concrete.