Durability characteristics of self-consolidating concrete designated for repair applications |
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Authors: | Soo-Duck Hwang Kamal H Khayat |
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Affiliation: | (1) Department of Civil Engineering, Université de Sherbrooke, Sherbrooke, QC, Canada, J1K 2R1 |
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Abstract: | This paper presents test results carried out to study the influence of key mixture parameters on frost durability, scaling
resistance, and transport properties of self-consolidating concrete (SCC) that can be used in structural repair. Regardless
of the w/cm, binder type, or admixture combination, properly designed SCC can develop high resistance to freezing and thawing with frost
durability factor greater than 80%. The optimized mixtures had 56-day rapid chloride-ion permeability (RCP) values of 200–900
Coulomb. On the average, SCC made with 0.42 w/cm developed 20% higher capillary porosity, 20% lower compressive strength, and 30% greater RCP value compared to similar SCC
prepared with 0.35 w/cm. The type of blended cement in use had considerable influence on transport properties. For a given mix design, concrete with
180 mm slump consistency exhibited similar RCP value of 505 Coulomb compared to 630 Coulomb for the same concrete with greater
dosage of HRWRA to secure a slump flow consistency of 670 mm. |
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Keywords: | Capillary porosity Frost durability Transport properties Repair Self-consolidating concrete |
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