Abstract
The main idea of this study is to find the effect of steel fiber on the strength and internally curing of self-consolidated concrete (SCC), by using lightweight aggregate (LWA) from available porcelain.  The work includes two stages; the first stage involved making several experimental mixes and then choosing the one that corresponds to international standards with natural properties. The second stage was adding lightweight aggregate (LWA) by replacing 15% of sand with saturated fine lightweight aggregate (LWA) as internal curing material to study the change in the Mechanical properties of SCC. Four concrete mixes were used with different volume fractions of hooked steel fibers were incorporated 0%, 0.5%, 1%, and 1.5%.  Results showed that adding steel fibers provides a slight increase in compressive strength while significant enhancement in tensile properties was observed. Furthermore, replacement of fine aggregate by (LWA) causes an increase in hydration which leads to higher compressive and tensile strengths. Results of the rate of absorption indicate that adding steel fibers has beneficial effects.
Highlights
The development of self-consolidated concrete (SCC) is improving the product quality and efficiency of the building
The objective of this study is to evaluate the effects of hooked end steel fiber on hardened properties of SCC with partially replaced of fine lightweight aggregate
The compressive, split tensile, flexural, shear, and impact strength was found to discuss the effect of the superabsorbent polymer, the results were found 0.1% to 0.4% by weight of cement as a range of the superabsorbent polymer, and the steel fiber percentage was 2% by volume of concrete
Summary
The development of self-consolidated concrete (SCC) is improving the product quality and efficiency of the building. SCC homogeneously distributed and without air voids due to its weight, without any additional compaction. One of the main advantages of using SCC is the minimization of labor needed for finishing. The use of SCC decreases the costs and reduce the time of building. Segregation resistance of SCC is enhanced by modifying the mix proportions, e.g. reducing the w/c ratio, increasing the fines content and add admixtures (Akers, et al, 2003; ACI (308-213), 2013 & ASTM, C., 2013)
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