Mechanical Properties of High-Strength High-Performance Reinforced Concrete Shaft Lining Structures in Deep Freezing Wells

Table 3

HSHPC strength test results.

Specimen number	Design strength grade	Slump (mm)	Compressive strength of cube specimen (MPa)
			3 d	7 d	28 d
1	C60	206	57.6	63.7	70.4
2	C65	213	60.7	69.8	75.8
3	C70	195	64.2	72.7	79.5
4	C75	210	69.5	78.2	85.3
5	C80	205	73.2	81.4	90.1