Experimental Investigation on Damage Behavior of Polypropylene Fiber Reinforced Concrete under Compression

International Journal of Concrete Structures and Materials

Table 4 Elastic stiffness of every loading cycle for each concrete mix (× 10⁴ MPa).

Cycles	PF000	PFA05	PFA10	PFA15	PFB15	PFC15	PFA20
0	24.63	26.16	26.79	27.25	27.48	29.26	22.24
1	20.28	19.13	23.17	20.69	19.37	19.87	19.90
2	30.23	26.08	35.54	29.05	26.54	25.33	33.22
3	33.84	32.80	37.77	36.37	36.83	33.86	36.79
4	22.12	23.57	22.78	26.61	27.67	26.03	22.86
5	13.91	16.88	14.10	18.15	20.49	16.71	15.47
6	8.83	10.18	9.78	13.55	15.82	11.72	11.93
7	7.11	7.76	7.77	10.63	12.37	9.11	9.72
8	5.55	5.93	6.35	8.21	9.89	7.18	8.01
9	3.72	4.30	5.65	6.79	8.17	5.84	6.78
10	2.28	3.43	5.19	5.41	7.03	5.13	5.87
11	9.13	–	–	–	6.18	4.32	5.26