Reduction of Postfire Properties of High-Strength Concrete

Table 4

Residual properties of concrete specimens after cooling to ambient temperature (96 h)—(a).

Property	Temperature level (°C)
	230		400		500		600
𝑓𝑐,𝑇 (MPa)	54.6		42.5		30.4		17.0
	57.2	Mean; 54.5	41.9	Mean; 43.0	26.9	Mean; 27.6	15.6	Mean; 17.4
	51.7		44.7		25.5		19.6
𝐸𝑠𝑐,𝑇 (MPa)	30205		17057		10892		6639
	25834	Mean; 28309	16788	Mean; 16886	10646	Mean; 10393	6227	Mean; 6406
	28889		16814		9642		6352
𝐸𝑐,𝑇 (MPa)	31745		16362		11091		6752
	28254	Mean; 29206	16410	Mean; 16463	8401	Mean; 9489	10363	Mean; 8337
	27619		16616		8975		7896