Title: Abrasion Resistance of High-Strength Concrete Made with Class C Fly Ash

Author(s): Tarun R. Naik, Shiw S. Singh, and Mohammad M. Hossain

Publication: Materials Journal

Volume: 92

Issue: 6

Appears on pages(s): 649-659

Keywords: abrasion resistance; compressive strength; concretes; fly ash; wear.

DOI: 10.14359/9785

Date: 11/1/1995

Abstract:
This work was undertaken to evaluate the abrasion resistance of concrete proportioned to have five levels of cement replacements (1.5, 30, 40, 50, and 70 percent) with one source of Class C fly ash. A reference concrete without fly ash was proportioned to have a 28-day compressive strength of 41 MPa. Concrete specimens were subjected to abrasion according to the ASTM C 944 test method. In this work, all concretes made with and without fly ash passed the abrasion resistance requirements per ASTM C 779, Pro-cedure C. Depth of wear values produced by the ASTM C 944 test were quite low (less than I mm) for the strength levels tested in this work. An accelerated test method was developed and used to evaluate the abrasion resistance of high-strength concrete. This method used grinding wheels with smaller washers, and a standard Ottawa sand was applied to the surface being abraded at intervals of 1 min. Accelerated test results showed that the abrasion resistance of concrete having cement replace-ment up to 30percent was comparable to the reference concrete without fly ash. Beyond 30 percent cement replacement, fly ash concrete exhibited slightly lower resistance to abrasion relative to non-fly ash concrete.