Steel fiber's effects on the physical and mechanical characteristics of selfcompacting concrete (SCC) made of recycled gravel
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Keywords:Self-Compacting Concrete, Steel Fiber, Physico-Mechanical Properties, Recycled Concrete Gravel, Open Porosity
In order to adapt the concrete to structures with more complex and highly reinforced sections, research has been carried out in recent years in Japan with the aim of developing concrete formulations characterized by high workability while being stable. (Low segregation, bleeding, and compaction), with good mechanical characteristics and durability. The culmination of this research has given rise to a new type of concrete that can satisfy the properties mentioned above, called self-compacting concrete (SCC). SCC is characterized by its high volume of paste, a large amount of fines, the use of superplasticizers, and a low volume of gravel. For the preservation of the environment and in the vision of sustainable development, due to the increasing demand for the use of aggregates, crushed gravel can be replaced by recycled concrete gravel. To improve the properties of SCCs based on recycled concrete gravel, metal fibers are added. The objective of this work is to study the effect of the introduction of metal fibers in selfcompacting concretes based on recycled concrete gravel on the physico-mechanical properties of these SCCs. The results obtained show that 50% recycled concrete gravel is the best, and the 1% fibers improve the physico-mechanical characteristics of these SCCs.
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