Effect of Polypropylene Fiber on the Strength and Dry Cracking of Mortar with Coal Gangue Aggregate

Table 5

Testing results of compressive strengths and their deviations.

PP (%)	3d testing (MPa)	Average (MPa)	Deviation (%)	3d testing (MPa)	Average (MPa)	Deviation (%)
0	18.6		3.63	42.8		2.28
	19.4		0.52	44.7		2.05
	19.1	19.3	1.04	42.9	43.8	2.05
	20		3.63	43.8		0.00
	19.2		0.52	44.9		2.51
	19.5		1.04	43.7		0.23
0.6	21.9		3.52	49.7		2.44
	22.8		0.44	49.2		1.41
	22.3	22.7	1.76	47.6	48.5	1.89
	21.9		3.52	46.8		3.54
	23.8		4.85	48.3		0.45
	23.5		3.52	49.5		2.03
0.9	22.8		0.51	46.2		2.57
	22.1		2.57	47.2		0.46
	22.5	22.7	0.81	48.1	47.4	1.44
	21.9		3.45	49.2		3.76
	23.6		4.04	46.5		1.93
	23.2		2.28	47.3		0.25
1.2	21.2		4.65	43.6		4.77
	22.2		0.15	44.8		2.15
	21.3	22.2	4.20	47.2	45.8	3.09
	23.5		5.70	46.9		2.44
	22.1		0.60	46.5		1.57
	23.1		3.90	45.7		0.18
1.5	21.7		1.32	46.4		2.39
	20.5		4.28	45.1		0.48
	20.7	21.4	3.35	43.7	45.3	3.57
	22.1		3.19	44.6		1.58
	20.9		2.41	47.2		4.16
	22.6		5.53	44.9		0.92