Table 5.

Resist pull-out ultimate bearing capacity of steel bars after each round of grouting with different calcium source concentrations (unit: N).

Number of grouting cycles	The calcium source concentration is 0.5 mol/L	The calcium source concentration is 1.0 mol/L	The calcium source concentration is 2.0 mol/L
3	230.32	289.14	311.23
4	389.11	434.03	576.02
5	530.37	687.76	575.83
6	703.23	687.23
7	703.35

Due to the small amount of calcium carbonate generated in the first 2 rounds of grouting, their anchoring ability to the steel bar was insufficient, and the value could not be recorded.