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

Table 4

Testing results of flexural strengths and their deviations.

PP (%)	3d testing (MPa)	Average (MPa)	Deviation (%)	3d testing (MPa)	Average (MPa)	Deviation (%)
0	5.67		1.90	9.53		2.56
	5.99	5.78	3.63	9.68	9.78	1.02
	5.68		1.73	10.13		3.58
	6.48		0.15	9.87		2.66
0.6	6.6	6.49	1.69	10.06	10.14	0.79
	6.39		1.54	10.49		3.45
	5.81		6.74	9.72		2.99
0.9	6.31	6.23	1.28	10.38	10.02	3.59
	6.57		5.46	9.96		0.60
	5.98		0.67	9.87		0.70
1.2	5.63	5.94	5.22	10.43	9.94	4.93
	6.21		4.55	9.52		4.23
	5.76		1.20	9.55		3.24
1.5	6.23	5.83	6.86	10.29	9.87	4.26
	5.50		5.66	9.77		1.01