In order to improve the strength of foam concrete and explore the evolution characteristics of the compressive rupture energy of fiber-reinforce foam concrete.It studies the effects of water-binder ratio,fly ash content and fiber content on the compressive strength and dry density of foamed concrete by designing orthogonal experiments.Based on multi-layer analysis method,the optimal ratio combination is obtained.The stress-strain curves and the evolution of compressive energy were analyzed by static uniaxial compression test.The results show as follows:(1)The primary and secondary relationship between the 28d compressive strength and dry density of foam concrete is as follows:water-binder ratio＞fiber content＞fly ash content;(2)The optimal ratio combination is A2B1C2,that is,the water-binder ratio is 0.32,the fly ash content is 10％,and the fiber content is 2％;(3)Compared with the control group,CPE,CCE,CTE and CTI in the preferred group were improved to varying degrees.Finally,combined with the macroscopic fracture morphology and microscopic fracture morphology of the foamed concrete,the results show that the addition of fiber improves its brittleness and show two kinds of failure forms,pulling out and pulling out,which play the role of bridge and crack resistance.
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