Research Articles | Challenge Journal of Concrete Research Letters

Performance of Self-Compacted Concrete Exposed To Fire or Aggressive Media

Khaled Mohamed Heiza
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Abstract


Fires and aggressive environment affect the durability of different types of concretes, so experimental investigation of concrete deterioration is very essential. The production of self – compacted concrete (SCC) mixes with two different types of mineral admixtures (silica fume and fly ash) are included in this research. The workability of fresh concrete mixes was investigated using five different international specified techniques. The properties of hardened concrete samples were determined under the exposure of different temperatures, which ranges between 25ºC and 600ºC. The effects of the methods of treatment for concrete samples after being exposed to fire on there, physical and mechanical properties were investigated. On the other hand the effects of some aggressive and corrosive mediums on the hardened mechanical properties and deterioration of the different mixes of (SCC) in comparison with normal concrete (NC) was also investigated. Both (MgSo4) and (MgCl2) were used to investigate the corrosion of reinforcing steel bars and deterioration of SCC mixes. Self-compacted concrete containing fly ashes has a good durability performance rather than self compacting concrete containing silica fume.


Keywords


media; self-compacting; strength; deterioration; weight loss, fire resistance

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