ISSN: 0149-6123
Page Count: 5

A Rockwell Hardness Test for Concrete
Winslow, DN
Associate professor, School of Engineering, Purdue University, IN

Abstract

The standard superficial Rockwell 15Y hardness test has been adapted for use on concrete. Hardness measurements were made on the mortar regions between the coarse aggregate pieces. A correlation between this hardness and the concrete's compressive strength was developed. For 7.5- by 15-cm (3- by 6-in.) cylinders, it is Rockwell 15Y hardness = 73.5 (log compressive strength in psi) — 187 or 73.5 (log compressive strength in MPa) — 28.0. Various effects of specimen preparation and size are discussed, as are the statistics of the test.

Keywords:
compressive strength, concretes, Rockwell hardness, Rockwell superficial hardness

Paper ID: CCA10366J
DOI: 10.1520/CCA10366J
ASTM International is a member of CrossRef.