The repair mortar have the following features :short coagulation time, fasthardening, early strength, anti-sag, strong adhesion , resistance to cracking and so on.
具有凝结时间短、硬化快、早强、抗流挂、粘结力强、不易开裂等特点，为可塑性材料。
2
Sulphoaluminate cement has better properties than Portland cement, high strength, fasthardening, impermeability, corrosive resistance, frost resistance, expansive property and so on.
硫铝酸盐水泥比硅酸盐水泥具有早强、高强、抗渗、耐侵蚀、抗冻、微膨胀等性能。
3
This paper studied the setting and hardening property and strength property of concrete prepared by fast setting and hardening cement and retarding admixture.