Enhancing the Capacity of Voided Reinforced GFRP One-Way Slabs Using Tact Bundled Waste Plastic Bottles

Many researchers are interested in the behavior of voided concrete members, which are used to increase flexural capacity by increasing the section depth. However, few studies have concerned ways to expand the voids to increase the self-weight loss while maintaining the permitted carrying capacity of these members. This study deals with the effect of a void scheme to further reduce the weight of glass fiber-reinforced polymer (GFRP) one-way reinforced concrete (RC) slabs by benefiting from the anti-classical curvature of one-way RC slabs. This study also incorporates green structures by using non-degradable plastic bottles in the RC one-way slabs. Three void configurations are used in this study: straight-line, back-to-back, and front-to-front void schemes. Specimens with the straight-line void configuration achieve the highest ultimate load capacity, reaching 91% of the solid reference slab’s capacity if reinforced near the minimum reinforcement ratio and 101% if used with a 30% larger GFRP reinforcement ratio. The back-to-back curved configuration is identified as the most efficient design, providing a 10.3% reduction in self-weight while retaining 83% of the solid slab’s ultimate load capacity, as compared with the front-to-front configuration, which retains only 73%.