Development and application of new kind of cement composite grout

This paper tries to promote the performance of grouting material so as to resolve the problems of grouting emerged in construction. After many experiments this paper develops three types of cement composite grouts (CWP composite grouts) with unique performance, finds a new kind of retarder and discusses its mechanism on the basis of experiments. Furthermore ,the successful application of the early-hardening type of CWP composite grout is reported.