Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels

Table 6

Compressive strength of two admixture concrete under different curing conditions [22, 68].

Age	20°C + 95% RH		50°C + 50% RH		60°C + 50% RH		80°C + 50% RH
	Adding fly ash	Adding slag + fly ash	Adding fly ash	Adding slag + fly ash	Adding fly ash	Adding slag + fly ash	Adding fly ash	Adding slag + fly ash
3 d	26.2	27.0	31.3	34.5	33.8	32.9	38.0	31.4
7 d	39.4	43.1	35.7	39.6	36.2	35.8	39.6	34.7
28 d	47.3	52.5	44.1	48.0	42.3	38.1	41.5	37.7
60 d	50.6	55.2	48.2	52.2	47.0	43.5	43.1	39.1