Influence of Coupling Effects of Time and Water-to-Cement Ratio on Rheological Properties of Bingham Cement Grouts

Table 8

Verification results of four quantitative relationship models between water-to-cement ratio and yield stress of Bingham cement grouts.

Test number	Time/min	Calculated value of fitting model				Test value	Variance analysis/%
		Linear	Logarithm	Exponent	Power function		Linear		Logarithm		Exponent		Power function
							Variance	Change range	Variance	Change range	Variance	Change range	Variance	Change range
G1	0	1.8649	1.8843	2.0207	2.0336	1.9507	−4.60	2.12	−3.52	2.10	3.46	1.95	3.60	1.95
	3					1.9801	−6.18		−5.08		2.01		2.15
	15					1.9633	−5.28		−4.19		2.84		2.98
	25					1.9902	−6.72		−5.62		1.51		1.65
	40					1.9549	−4.83		−3.75		3.26		3.40
	55					1.9604	−5.12		−4.04		2.98		3.12
G2	0	0.2566	0.2436	0.2163	0.2183	0.2041	20.46	3.51	16.22	3.69	5.64	4.16	6.50	4.12
	7					0.1979	22.88		18.76		8.51		9.34
	16					0.1951	23.97		19.91		9.80		10.63
	23					0.2028	20.97		16.75		6.24		7.10
	45					0.2007	21.78		17.61		7.21		8.06
	58					0.1977	22.95		18.84		8.60		9.44