Effect of Rape Straw Fiber on Mechanical Properties and Microstructure of Fly Ash Concrete

Table 5

Test results.

No	RSF content (%)	RSF length (mm)	Compressive strength (MPa)	Splitting tensile strength (MPa)	Ultrasonic velocity (km/s)
0	0	0	50.96	3.87	5.00
1–1	0.1	20–30	52.32	4.16	4.96
1–2	0.2		52.69	4.27	5.10
1–3	0.3		49.53	3.93	5.00
1–4	0.4		48.37	3.90	4.93
2–1	0.1	30–40	52.26	3.69	5.13
2–2	0.2		55.41	4.31	5.38
2–3	0.3		50.45	3.55	5.02
2–4	0.4		47.64	3.29	4.88
3–1	0.1	40–50	49.51	3.83	4.96
3–2	0.2		47.01	4.05	4.84
3–3	0.3		44.97	3.21	4.80
3–4	0.4		42.61	3.15	4.73