Anti-cracking concrete properties based on the synergistic expansion effect of internal curing agents

This paper designed 7 groups of C40 crack resistant concrete mix and conducted experimental research on working properties, mechanical properties, deformation properties and crack resistance, with monolithic laminated wallboard technology. The test results find that: the shrinkage compensated concrete with curing agent in light sand shows that the curing agent in light sand gives full play to the synergistic expansion effect. While significantly improving the design strength of concrete, it effectively controls the crack generation in the solidification process of concrete specimens, which has good crack resistance and durability. From the aspect of concrete mix design, this study provides an effective solution to control the cracks of cast-in-place concrete structures in the process of application of assembled monolithic laminated wallboard technology.