Compressive and tensile creep of heat-cured ordinary Portland and slag cement concretes

Abstract

Experimental compressive and tensile short-term creep data are reported for ordinary Portland cement (OPC) and slag cement concretes cured under temperature-matched conditions up to peak temperature and then cooled under ambient conditions. The influence of replacement of cement by slag on deformation is analysed, together with that of temperature. An increase of temperature during creep does not appear to cause 'additional' transitional thermal creep and, for the same maturity, creep of slag cement concretes is less than that of OPC concrete. For all concretes, tensile creep is greater than compressive creep, especially after short times under load. Empirical expressions are given that yield creep functions from a knowledge of the strength and temperature history of concrete.