| Abstrakt: |
The principal of using the material regarding to its strength and durability within the service life of the structure while reducing the energy and resource consumption due to the construction and operation of a structure is called sustainable structural engineering, it is enlargement of sustainable construction in the future regarding to the standard concrete. Reinforced concrete slabs (solid and with openings) represents one of the common essential fundamental elements and are generally employed in many kinds of engineering constructions and applications. Reactive Powder Concrete (RPC) is a new ultra-high-performance concrete which tends to exhibit superior properties, high durability, and long-term stability, in form of superplasticizer, cement mixture with silica fume, steel fiber (of varying types, sizes, and geometries), and the fine glass of (<600 mu). Ten reinforced concrete slabs with different variables (opening shapes, opening locations, opening size and steel fiber content) were casted and tested to study the behavior of RPC material in flexure in term of deflection, concrete strains, and ultimate loads. RPC has better performance in term of flexural behavior, cracking control and deformation control. Preliminary investigation tests were conducted to study the fresh and hardened properties of concrete. The results show that increase in steel fiber content leads to an increase in the failure load and consequently increase in maximum deflection and the flexural toughness increases. |
