Design and Performance of Ultrathin Overlay Epoxy-Rubber Concrete

Table 3

Secant slope variation.

Rubber powder replacement rate (%)	Tapped porosity secant slope
	Slope	Rate of change (%)
0–10	0.048	—
10–30	0.017	64.6
30–50	0.033	94.1
50–70	0.266	704.5
70–90	0.205	23.0