Journal
CEMENT & CONCRETE COMPOSITES
Volume 39, Issue -, Pages 115-121Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2013.03.027
Keywords
Durability; Fly ash; Limestone; Slag; Strength
Funding
- Natal Portland Cement
- Cement and Concrete Institute
- National Research Foundation
- University of Cape Town's Concrete Materials & Structural Integrity Research Unit (CoMSIRU)
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This paper describes a study on the durability potential and strength of composite Portland-limestone cement (PLC) concrete mixtures blended with ground granulated blast furnace slag (GGBS) and/or fly ash (FA). Their performance was compared against ordinary Portland cement, plain PLC and Portland-slag cement concrete mixtures. Using the South African Durability Index approach, results indicate reductions in the penetrability of the composite PLC blends compared to the other mixtures. The durability indicators are chloride conductivity, gas (oxygen) permeability and water sorptivity. Compressive strength of the composite PLC mixtures containing both GGBS and FA showed competitive performance with the comparative mixtures, but FA blended PLC mixtures had diminished compressive strength values. The paper also presents considerations on the practical implications of using blended PLC concrete mixtures. (C) 2013 Elsevier Ltd. All rights reserved.
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