Elastic modulus of normal- and high-strength concrete in Hong Kong

Abstract

The elastic modulus of concrete made in Hong Kong is not quite the same as that of concrete made elsewhere because generally the mechanical properties of concrete are dependent on the types of raw materials used and the local conditions, which vary from place to place. Two separate experimental studies on the elastic modulus of the local concrete have been carried out in the past at The University of Hong Kong but each of these studies covered only a limited range of concrete strength. In this paper, the previous test results are summarized and the apparent discrepancy between them resolved by putting all the results together for a comprehensive statistical analysis. The outcome is a new correlation equation between the elastic modulus and the cube compressive strength for the local concrete covering the full range of cube compressive strength from 15 to 100 MPa. Lastly, design values of elastic modulus for incorporation into the local codes of practice are proposed.