Research on Performance and Preparation of High Strength Liquid Alkali-free Setting Accelerator

A high strength liquid alkali-free setting accelerator in sprayed concrete was prepared by ultrasonic heating technology, to inorganic and organic compounds as the main raw material. The cement setting time, mortar and concrete mechanics performance and durability are studied, and its coagulation mechanism is studied by pore structure analysis. The test results show that the SA content was 5%, it initial setting time is less than 4 min, final setting time is less than 8 min, 1 d compressive strength ratio is more than 193.3%, and 28d compressive strength ratio can be increased by 118.5%.