Influence of Nanomodified Waterproofing Agent on the Performance of Rigid Waterproof Concrete in Underground Engineering

Table 5

Comparison of concrete impermeability test results.

Group	P2	P3	P4	P5	P6	P7
Reduction rate of each group relative to P1 group	71.6%	75.1%	76.9%	76.9%	74.4%	76.1%