Service Life Prediction of High-Performance Concrete with Respect to Chloride Ion Penetration by Incorporated with Fly Ash and Silica Fume
B. Daya Rani1, B. Kameswara Rao2

1B. Daya Rani, Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur (Andhra Pradesh), India.
2B. Kameswara Rao, Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, Guntur (Andhra Pradesh), India.
Manuscript received on 02 May 2019 | Revised Manuscript received on 14 May 2019 | Manuscript Published on 28 May 2019 | PP: 484-489 | Volume-7 Issue-6C2 April 2019 | Retrieval Number: F10870476C219/2019©BEIESP
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Abstract: Fly ash is a very small particle which makes the concrete high dense and reduces the permeability of the concrete. The concrete mixture generates a very low heat of hydration which prevents thermal cracking. Its plays a vital role when concrete is exposed to marine environment. Silica fume benefits are evident in the fresh concrete state before it begins to harden. Because of high surface area silica fume particles affecting a mobility of water with in concrete, segregation and bleeding of concrete are virtually eliminated. Service life is the period of time during which a building, a structure or material meets or exceeds the requirements established for it. Chloride diffusivity is a very important property of concrete that affects the durability and service life of reinforced concrete structure. Deterioration of reinforced concrete structures due to chloride ingress followed by reinforcement corrosion is a growing problem all over the world. This paper is focused on increasing of service life of a reinforced concrete structure by incorporation of fly ash and silica fume in concrete. The studies have been conducted on twelve mixes of different workability with three water binder ratios of 0.3,0.4,0.5 and three replacements of OPC by fly ash and silica fume of 0,70,60,50,40 and 30%. Chloride penetration studies have been carried out for exposure ages of 28 and 90 days. The specimens were exposed to 3.5% of sodium chloride solution with respect to water, Where as chemical analysis is carried out to the exposed specimens.
Keywords: Fly Ash, Silica Fume, Corrosion, Service Life Prediction, Water Binder Ratio, Chloride Ion Penetration.
Scope of the Article: Properties and Mechanics of Concrete