AGGREGATES AND THE DEFORMATION PROPERTIES OF CONCRETE

This paper presents results from two comprehensive series of tests spa nning a 5-year period that investigated the influence of 23 different aggregate types on the properties of hardened concrete. The informatio n given is concerned with concrete stiffness and deformation. Tables o f design values for estimating the elastic modulus of concrete are giv en. The influence of aggregate type on concrete shrinkage and creep is discussed with reference to the experimental work Guidance is provide d on the adjustment of code values for the effects of aggregates. The results provide evidence that aggregates exert a profound and importan t influence on the deformation properties of concrete.