Curing Effects on High-Strength Concrete Properties

Table 4

Percentage increase in compressive strength with oven replacement compared with other curing conditions.

W/B	Curing age	Specimens cured at 30°C			Specimens cured at 50°C			Rep 50°C vs Rep 30°C (%)
		Rep vs standard (%)	Rep vs dry ov (%)	Rep vs steam (%)	Rep vs standard (%)	Rep vs dry ov (%)	Rep vs steam (%)
0.3	3 days	41	42.3	50	39.47	34.21	34.21	−2.63
	7 days	18	39.3	35.7	19.77	20.93	32.56	2.33
	21 days	11.11	18.5	14.8	14.29	15.48	17.86	3.57
	28 days	1.3	8	−2.67	2.63	−5.26	−1.32	1.31
0.35	3 days	58.9	48.2	57.14	71.95	39	37.8	31.71
	7 days	43.8	50.7	43.8	49.75	31.37	26.47	10.54
	21 days	25	48.7	18.4	22.97	20.27	−6.76	−2.7
	28 days	1.39	45.56	9.7	17.44	20.93	2.33	16.28
0.4	3 days	56.1	57.89	47.37	64.79	42.25	46.48	19.72
	7 days	43.66	52.11	32.39	45.21	34.25	24.66	2.74
	21 days	32.4	43.24	17.57	31.51	31.51	9.59	−1.37
	28 days	15.28	34.72	9.72	20.78	35.1	11.69	6.49

Rep = oven replacement; Standard = standard curing; dry ov = dry oven.