Study on Strength and Ultrasonic Velocity of Air-Entrained Concrete and Plain Concrete in Cold Environment

Table 1

The mix proportion of plain concrete per cubic metre.

W/C	Strength of cement (MPa)	Cement (kg/m^3)	Sand (kg/m^3)	Coarse aggregate (kg/m^3)	Water (kg/m^3)	Air content (%)
0.45	42.5	427	499	1284	192	0.9
0.50	42.5	383	663	1154	193	1.7
0.55	32.5	360	611	1241	198	1.9