Effects of mortar ratio on the properties of super early strength grouting materials by ternary complex system

An innovative research on preparation of super early strength grouts is presented. A ternary complex system of sulphoaluminate cement, aluminate cement and gypsum was used in the grouts combined with a variety of additives. The effect of mortar ratio on the properties of grouts was studied, and the microstructure was observed. The results show that high mortar ratio can prepare super early strength grouts; 2 h and 90 d compressive strength of the grouts is 42.6 and 105.6 MPa, respectively. Furthermore, the grouting material has no retraction of late strength and possesses micro-expansion property, which attribute to the formation of ettringite.