Effect of Atmospheric Pressure on Performance of AEA and Air Entraining Concrete

Table 7

Frost resistance of concrete formed under different air pressures.

Sample	Atmospheric pressure	AEA dosage (%)	Air content (%)	Frost resistance of 28 days
				Relative dynamic elasticity modulus (%)			Loss of mass (%)
				P50	P100	P150	W50	W100	W150
WH	Tibet, 65.9 kPa	0.04	3.6	90	86	78	0.4	1.2	2.7
XZ	Hubei, 101.1 kPa	0.04	5.1	93	90	84	0	0.3	1.0