Case Study: In Situ Experimental Investigation on Overburden Consolidation Grouting for Columnar Jointed Basalt Dam Foundation

Table 5

Properties of the ordinary cement slurry and the wet-ground cement slurry under normal pressure and high pressure.

Property	Pressure	Variety of cement	3 : 1	2 : 1	1 : 1	0.8 : 1	0.5 : 1
7 d compressive strength (MPa)	Normal	Portland cement	3.25	4.10	5.40	7.63	11.60
		Wet-ground fine cement	4.21	7.3	12.3	14.5	15.4
	High	Portland cement	50.4	70.8	73.5	75.5	66.2
		Wet-ground fine cement	70.8	94.5	95.1	93.2	69.3
28 d compressive strength (MPa)	Normal	Portland cement	11.3	15.1	15.9	16.8	22.6
		Wet-ground fine cement	12.3	17.4	22.3	23.7	28.6
	High	Portland cement	83.4	99.6	102.2	101.6	86.5
		Wet-ground fine cement	105.8	108.7	111.6	109.7	95.3