Preparation and Performance of a New-Type Alkali-Free Liquid Accelerator for Shotcrete

Table 3

The effect of content of accelerator on strength of cement mortar.

Content of accelerator/%	Type of cement	Flexural strength/MPa			Compressive strength/MPa			Retention rate of 28 d compressive strength/%
		1 d	7 d	28 d	1 d	7 d	28 d
0	Jidong cement	1.10	3.86	5.50	15.20	30.68	39.18	100
	Qinling cement	2.65	5.85	6.16	17.18	34.80	38.75	100
6	Jidong cement	2.30	4.86	6.30	12.55	42.32	43.16	110
	Qinling cement	3.37	6.68	7.25	21.36	38.53	40.12	104
8	Jidong cement	2.80	6.52	7.10	13.75	39.60	44.45	113
	Qinling cement	3.54	7.00	7.85	23.40	42.55	42.70	110
10	Jidong cement	2.60	6.15	6.84	11.78	40.92	42.24	108
	Qinling cement	3.45	6.37	7.43	20.16	39.88	42.18	109