Behavior of reinforced reactive powder concrete one-way slab under static loads

• Main Authors: Madhloom, Tahseen A., Ismael, Murtada A.
• Format: Conference Proceeding
• Language: English
• Subjects: Concrete slabs; Deflection; Ductility; Ductility tests; Load tests; Material properties; Reinforced concrete; Reinforcing steels; Silica fume; Static loads; Steel fibers; Structural stability; Ultimate loads; Ultra high performance concrete
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0238206

One of the recent improvements in concrete technology is reactive powder concrete (RPC), exhibiting superior properties such as high durability, great ductility, high strength, and long-term stability. This paper introduces experimental research to study the structural behavior of reactive powder reinforced concrete (RPC) simply supported one-way slabs that undergo static loading. In the present study, five RPC one-way slabs were investigated. These slabs have a length of 980 mm, a width of 400 mm, and a thickness of 40 mm. Slabs was similar in size and properties of materials but different in the volumetric percent of steel fibers and percentage of silica fume. They were cast into two groups; the first group had three values of steel fibers: 0%, 1%, and 2%, respectively, and the second group included three ratios of silica fume: 15%, 20%, and 25%, respectively. Experimentally, it has been noticed that the ductility and flexural behavior of RPC one-way slabs are significantly affected by increasing the percent of steel fibers, but influence of silica fume is less significant. The test results showed that increasing the steel fiber volumetric ratio from 0% to 1% and to 2% resulted in an increase of first cracking load test with value of (48.15%, 85.18%) respectively, increase of the ultimate load test with value of (45.43%, 84.35%) respectively, and the value of ultimate mid-span deflection increased from 30.18% to 67.26%. The test results also revealed that increasing the content of silica fume from 15% to 20% and then to 25% resulted in an increase of first cracking load test with value of (15.38%, 28.21%) respectively, increase of the ultimate load test with value of (17.82%, 29.60%) respectively, and the value of ultimate mid-span deflection increased from 6.44% to 15.45%.