Self-compacting concrete incorporating high volumes of class F fly ash: Preliminary results
By N. Bouzoubaâ, M. Lachemi. 2001
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ABSTRACT In recent years, self-compacting concrete (SCC) has gained wide use for placementin congested reinforced concrete structures with difficult casting conditions. Forsuch applications, the fresh concrete must possess high fluidity and goodcohesiveness. The use of fine materials such as fly ash can ensure the requiredconcrete properties. The initial results of an experimental program aimed atproducing and evaluating SCC made with high-volumes of fly ash are presented anddiscussed. Nine SCC mixtures and one control concrete were investigated in thisstudy. The content of the cementitious materials was maintained constant (400kg/m 3 ), while the water/ cementitious material ratios ranged from 0.35 to 0.45. Theself-compacting mixtures had a cement re placement of 40, 50, and 60% by Class Ffly ash. Tests were carried out on all mixtures to obtain the properties of freshconcrete in terms of viscosity and stability . The mechanical properties of hardenedconcretes such as compressive strength a nd drying shrinkage were also determined.The self-compacting concretes develope d a 28-day compressive strengths rangingfrom 26 to 48 MPa. The results show th at an economical self-compacting concretecould be successfully developed by incor porating high-volumes of Class F fly ash.
Subfields: Building and Construction, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/c4e73c0fab54ac3ef3f594c43df8fdcd1df4e4dc
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