Properties of Engineered Cementations Composite Concrete (Bendable Concrete)
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Abstract
Bendable concrete, also known as Engineered Cementitious Composites abbreviated as ECC, is a class of ultra-ductile fibre-reinforced cementitious composites characterized by high ductility and tight crack width control. This material is capable of exhibiting considerably enhanced flexibility. The main object of this work was to investigate the properties of self-compacting bendable concrete (SECC) produced by different types and percentages of material and to achieve high resistance to segregation, high workability, and low yield stress such as of steel fiber that was (1,1.5 and 2) %, the percentage of silica fume that was (10,15 and 20) %, the percentage of PVA (Polyvinyl alcohol) that was (0.2,0.3 and 0.4) %. To achieve this aim, seven mixes of SECC were designed and tested. A survey of fresh and mechanical properties of different SECC mixtures was evaluated using slump flow and V-Funnel tests. The workability of all studied mixes is good, with slump flow diameter greater than or equal to (24 mm), flow times range between (7 and 7.5) sec, and the mechanical properties of hardened SCC mixes are also assessed compressive strength, splitting tensile strength, modulus of rupture, and modulus of elasticity. The mechanical properties were significant when using steel fiber with 1% to 1.5% and 2%, increasing the compressive strength by about 3% and 8% and the splitting tensile strength by about 20% and 37%, respectively.
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