Behavior of One Way Foamed Concrete Slabs Using Different Types of Reinforcement

Abstract

This research included a study of the behavior of lightweight foam concrete and a study of the effect of adding lightweight aggregate (LECA) to some groups. The program also included an examination of the behavior of foam concrete for one-way slabs with and without adding LECA aggregate in different proportions and with two types of reinforcement (normal and GFRP).

This study aimed to Investigate the behavior of lightweight one-way foam concrete slabs reinforced with two types of reinforcement (Normal reinforcement and GFRP), performing an experimental investigation to produce lightweight foamed concrete and Investigate the effect of additional of LECA to improve the mechanical properties of LWFC.

Light-weight foam concrete was produced with compressive strength 35.2MPa and dry density 1830Kg/m3, and then adding LECA content to the fresh mixture (LWFC).The results were compared between the two mixtures (containing LECA aggregates and without LECA aggregates) to determine the effect of LECA on improving the mechanical properties of LWFC ,where was compressive strength 42MPa and dry density 1885 Kg/m3 at 28 days ,and note that the mechanical properties of LWFC with LECA achieved higher results for mechanical properties such as compressive strength, splitting strength, modulus of elasticity, and modulus of rupture increased by 16.19%,11.8%, 27.93%, and 29.7%, respectively ,and the flowability of the lightweight foamed concrete reduced by 25% compared to lightweight foam concrete without LECA. the results showed that ultimate load increases for the slabs that has the highest reinforcement ratio (ρmax.) and gradually decreases for the slabs that has an average (ρavg.) and minimum (ρmin.) reinforcement ratio, respectively. On the other hand, as the ratio of reinforcement increases, deflection decreases, and vice versa

also, presence of LECA also increased the ultimate load rate more than the slabs that did not contain LECA.