ABSTRACT
Ultra-high-performance concrete (UHPC) demonstrates extremely large autogenous shrinkage due to its high content of cement and very low water-to-binder ratio (w/b). Many techniques can be used to mitigate the autogenous shrinkage developed in cement-based materials. Based on their action mechanisms, they can be classified into the following categories: (1) control of hydration reaction; (2) internal restraint for shrinkage; (3) reduction of the surface tension of pore solution; (4) compensation for shrinkage; and (5) internal curing (mitigation of the drop of internal relative humidity). This paper reviews the research progresses on the mitigation of the autogenous shrinkage developed in UHPC from the five aspects. This will help the selection of effective mitigation techniques for autogenous shrinkage and the design of efficient UHPC mixtures.
