ABSTRACT
The failure of patch repair mortars as a result of restrained shrinkage cracking is responsible for the reduced service life in both concrete repairs and patch repair materials. Cracking in patch repair materials is dependent on important material properties such as tensile relaxation, magnitude of restrained shrinkage deformations, elastic modulus, tensile strength, etc. Many researchers have studied the effects of various mix design parameters and constituents on each of the aforementioned material properties. However, information regarding the effect of simultaneously varying multiple mix design parameters and constituents on the cracking performance of patch repair mortars is scanty. This paper reviews the effects of various mix design parameters—binder type, binder content, water content, water:binder ratio, chemical admixtures and curing—on the crack-de ter mining material properties of patch repair materials.
