Properties of Cement-Based Materials Containing Crystalline Sealer

This study investigated the influence of crystalline sealers and curing environment on compressive strength, splitting strength and elastic modulus of cement-based composites. Four kinds of crystalline sealers addition (0 %, 3 %, 5 % and 7 %) were used in the concrete specimens. SEM observations were assisted in verifying the results of mechanical properties. The test results demonstrated that the specimens increased the mechanical properties with the inclusion of crystalline sealers increased. The crystalline sealers reacted with cement to produce the crystals and hydrations, which could fill with the pore and supply a denser microstructure. This appearance was verified by the SEM micrographs. In inclusion, the cement-based composites containing 7 % crystalline sealers seem to give superior mechanical properties, and make the pores become finer and enhance the durability.