Strengthening Concrete slabs rest on soil grade

Abstract

Concrete slabs are the most construction members which is in touch with soil. The applied load on concrete slab causes to deformation in slab and soil both. Which making a relative movement between the to medias. So, such problem named usually as soil-structure interaction. The study investigated this interaction by casting three concrete slabs and applied a static load on them to discuss their behavior and the soil response. The slabs of 600*600*40 mm dimensions and without steel reinforcement. The first slab is conventional while the second was of 0.5% percentage of steel fiber and the third specimen was of 1% of steel fiber. It was concluded that, the center of slab deflects downward, while the corners go upward then settles. Adding Steel fiber enhance the concrete compressive strength in a magnitude relative to the steel fiber amount. The development in slab strength 44.7% and 67.03% after adding 0.5% and 1% of fibers respectively.