Effect of Steel Fibres and Low Calcium Fly Ash on Mechanical and Elastic Properties of Geopolymer Concrete Composites

Table 8

Comparison of compressive strength (𝑓_cu), flexural strength (𝑓_cr), split-tensile strength (𝑓_cys), and bond strength (𝑓_bd) for various percentages of steel fibres (𝑉_𝑓).

𝑉𝑓	Strengths (MPa)				Percentage increase in strength
	𝑓cu	𝑓cr	𝑓cys	𝑓bd	𝑓cu	𝑓cr	𝑓cys	𝑓bd
0.0	28.89	3.20	3.36	12.10	0.00	0.00	0.00	0.00
0.1	33.55	3.68	3.87	12.82	16.13	15.00	15.17	5.95
0.2	37.55	4.16	4.37	14.05	29.98	30.00	30.05	16.11
0.3	33.11	3.87	4.06	13.59	14.61	20.90	20.83	12.31
0.4	32.22	3.52	3.70	13.33	11.53	10.00	10.11	10.16
0.5	31.5	3.31	3.48	12.94	9.03	3.43	3.57	6.94