Experimental Study on Flexural Properties of New Foamed Concrete Composite Wall Panels

Foam concrete composite wallboard has the advantages of lightweight, thermal insulation and other advantages, which is mainly used in the wall structure of buildings. This article conducts experimental research on the flexural performance of 12 steel truss composite panels (welded upper and lower chord steel bars and web bars). The research results show that the bending resistance of foam fine aggregate concrete composite slab is significantly improved with the increase of the steel bar diameter, but the bending resistance of the composite wallboard with the load bearing surface of fine aggregate concrete layer is weak, cracks appear earlier and the deflection is larger in the later stage of loading, so measures should be taken to control the development of cracks in the design. In addition, this paper uses the "Code for Design of Concrete Structures" to calculate the ultimate bending moment of composite wallboard and compare it with the measured value. It is found that the measured bending moment is much larger than the calculated bending moment, which indicates that the code design is too conservative and is not suitable for the bending moment calculation of foam fine aggregate concrete composite board, but the foam concrete board can meet the needs of the project and can be used as a light load-bearing component.