Cementitious grout for preplaced aggregate concrete: A review

Preplaced-Aggregate Concrete (PAC) consists of two main components, namely the cementitious grout mixture and coarse aggregate particles. Coarse aggregates are placed into the formwork, and then a fresh cementitious grout mixture is injected into the formwork to fill the voids created by the coarse aggregates to form a concrete. PAC has been used in many applications, such as underwater construction, casting concrete sections congested with reinforcement and concrete repair. The cementitious grout properties play an important role for this type of concrete to be successfully constructed. The cementitious grout rheology and physical properties should be practically suitable for the intended usage of the PAC. Therefore, the available literature on the effects of mixture proportions of the grout on the PAC properties is reviewed. The effects of water content on the grout fluidity, bleeding and compressive strength of the PAC are emphasized in this paper.