Development of Modified Grouting Material and Its Application in Roadway Repair Engineering

Table 9

The grouting parameters.

Serial number	Project	Parameters
1	Grouting materials	Modified grouting material
2	Water cement ratio	1.5 : 1
3	Lag grouting time	3-5 days after shotcreting
4	Grouting pipe	R25N self-drilling grouting anchor with length of 2.5 m and yield strength of 150 kN
5	Grouting pressure	2.0-3.0 MPa
6	Grouting quantity	Stop grouting when the design grouting pressure is reached or a large amount of grout leakage occurs
7	Slurry diffusion radius	About 2.5 m
8	Depth of grouting hole	3.0 m