High-Temperature Performance and Multiscale Damage Mechanisms of Hollow Cellulose Fiber-Reinforced Concrete

Table 4

Influence of high temperatures on physical properties of concrete.

Concrete series	Temperature (°C)	Holding time (h)	Mass loss ratio (%)	Relative elastic modulus (%)
PC	20	—	—	—
	300	2.5	3.6	77
		4	6.2	67
		5.5	7.6	60
	600	2.5	8.5	22
		4	11.7	17
		5.5	12.7	14
CFRC	20	—	—	—
	300	2.5	3.4	82
		4	4.8	74
		5.5	5.6	69
	600	2.5	6.2	27
		4	6.5	25
		5.5	7.5	24
	800	2.5	10.5	12
		4	12.3	11
		5.5	14.3	10
	1050	2.5	20.5	5
		4	22.1	5
		5.5	28.4	4