STRESS - STRAIN BEHAVIOUR OF SLAG CEMENT CONCRETE

The paper describes the results of test carried out on OPC concrete and slag cement concretes. Ten blended slag-cement concretes, made with typical slags from four countries (United Kingdom, Belgium, South Africa and Japan), are compared with a control OPC concrete. The slags replaced 30 to 70% of cement by mass. The bobbin shaped specimens were used in the direct tension test and 300x150 mm dia. cylindrical specimens were used in the axial and lateral strain tests. Poisson's ratio in compression was determined as the ratio of the lateral to axial strain at the ages of 14 and 84 days. Concretes at the age 84 days exhibits more linearity than at the age of 14 days and slag concrete becomes more brittle when stored in the dry environment. There was no difference between the Poisson's ratio of slag and OPC concretes.