Mechanical properties of energy sustainable round bamboo - Phosphogypsum composite floor slabs

Abstract

Round bamboo is a natural building material with excellent mechanical properties and has broad application prospects in green buildings. To realize the protection of round bamboo and promote the resource utilization of phosphogypsum, a kind of round bamboo-phosphogypsum composite (BPC) floor slab is proposed in this paper. To study the flexural performance of the round bamboo-phosphogypsum composite floor slabs, considering the factors of the thickness of the phosphogypsum, the number of dovetail nails, the number of round bamboo poles and the span, the flexural tests of 11 floor slabs were carried out, the influence of the factors on the flexural performance of the floor slabs was analyzed, and the calculation methods of the flexural stiffness and bearing capacity of the floor slabs were established. The results show that the bearing capacity, ductility coefficient and flexural stiffness of the control specimen are increased by 31.26%, 51.19% and 3.39 times compared with the bamboo skeleton. The ductility and flexural stiffness of the floor slab decrease with increasing span. The bearing capacity of floor slab increases with the increasing bamboo number and decreasing span. The calculation methods of flexural performance of the floor slabs established in this paper have certain accuracy. The round bamboo-phosphogypsum composite (BPC) floor slab realizes the efficient utilization of resources, which has reference significance for green buildings and sustainable development.