The main characteristics of the double fast (fast solidifying and fast hardening) cement is the quick setting and hardening, high hourly intensity, which is called "hourly cement" ". Cement setting time can be adjusted according to the need of construction, which is equivalent to the United States of cement, Japan's super fast cement, Germany's quick setting cement. The cement also has the advantages of micro expansion, low temperature strength, normal strength and normal strength. Mainly used for emergency repair works, underground works, tunnel engineering, anchor and shotcrete support engineering, water interception and plugging and highway maintenance and other projects. Dual fast cement in 1978 through the ministerial level technical appraisal, the same year won the National Science Conference award.                

Performance characteristics:          

1 fast setting and hardening setting time can be adjusted. Dual fast cement in a few minutes to start hardening, can meet the needs of emergency repair works.             

2 hours of high strength, stable growth in the late strength, high strength double fast cement 2H strength 20MPa above, 4H strength to reach 30MPa, 28 days of strength is 60MPa above.             

3 cement with micro expansion properties. The hydration process of the double fast cement forms more hydrated calcium sulfate, which causes the cement to produce micro expansion, which has good compactness, and the cement has good permeability.             

4 cement has good permeability. Double fast concrete corrosion resistance is good, can still play hours of high strength under low temperature conditions.