Effect of Compressive Strength on Abrasion Resistance for Fly Ash Concrete

Abstract

Concrete surface suffers damage due to various forms of wear such as erosion, cavitations, and abrasion due to various exposures. Abrasion wear occurs due to rubbing, scraping, skidding, or sliding of objects on the concrete surface. This form of wear is observed in pavements, floors, or other surfaces on which friction forces are applied due to relative motion between the surfaces and moving objects. Concrete abrasion resistance is markedly influenced by a number of factors including concrete strength, aggrega te properties, surface finishing, and type of hardeners or toppings. This paper presents the study of abrasion resistance of Indian fly ash mixes with locally available ingredients. The abrasion resistance and compressive strength of concrete containing high volume fly ash (HVFA) was investigated. Class F fly ash was replaced for cement upto 60% by weight. Due to Pozzolanic reactions of fly ash content, HVFAC showed improved abrasion resistance upto 25% with the increase in age. Strong correlation exists between abrasion resistance and compressive strength which is derived at 28, 56 and 90 days. The results of the investigations show that Indian fly ash can be effectively utilized for improving abrasion resistance of concrete surface.