Effect of Freeze-Thaw Cycles on the Internal Structure and Performance of Semirigid Base Materials

Table 1

Specifications of the ordinary Portland cement type P.O42.5.

Properties	Specifications	Standard threshold
Stability (boiling method)	Qualified	—
Initial time (min)	165	≥90
Final setting time (min)	203	≤600
3 d
Compressive strength (MPa)	26.4	≥17.0
Flexural strength (MPa)	5.87	≥3.5
28 d
Compressive strength (MPa)	49.6	≥42.5
Flexural strength (MPa)	8.07	≥6.5