Effects of PET Fibers on Pumpability, Shootability, and Mechanical Properties of Wet-Mix Shotcrete

Table 6

Analysis of variance results of wet-mix shotcrete (degree of freedom: 2).

Variable	Parameters	DEVSQ	F ratio	F critical value	Statistical significance	Contribution (%)
Slump	Width	22.22	7.69	19	—	33.67
	Length	38.22	13.23	19	—	57.91
	Content	5.55	1.92	19	—	8.42
	Error	2.89	—	—	—	—
Pressure drop	Width	164.22	56.84	19	Yes	80.24
	Length	4.22	1.46	19	—	2.06
	Content	36.22	12.53	19	—	17.70
	Error	2.89
Build-up thickness	Width	2.62	1.27	19	—	18.53
	Length	8.88	4.32	19	—	62.60
	Content	2.67	1.30	19	—	18.87
	Error	2.06	—	—	—
Compressive strength	Width	115.12	44.50	19	Yes	90.21
	Length	0.96	0.37	19	—	0.75
	Content	11.52	4.45	19	—	9.03
	Error	2.59	—	—		—
Splitting strength	Width	0.21	1.98	19	—	17.88
	Length	0.81	7.48	19	—	67.54
	Content	0.17	1.61	19	—	14.57
	Error	0.11	—	—	—	—