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Studies on mechanics of development of physical and mechanical properties of high-volume fly ash-cement pastes |
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| Authors: | R F Feldman G G Carette and V M Malhotra |
| Affiliation: | Institute for Research in Construction/NRC, Montreal Road, Ottawa, Ontario, Canada K1A 0R6 Concrete Technology Section, Canada Centre for Mineral and Energy Technology, (CANMET) 405 Rochester Street, Ottawa, Ontario, Canada K1A 0G1 |
| Abstract: | High-volume fly ash concrete for structural applications was developed at CANMET. In this concrete fly ash to ‘total cementitious material’ was maintained over 55%. The purpose of this work was to investigate, by the use of similar paste mixtures of the same fly ash and cement, the mechanism by which the mechanical properties were developed. Mechanical property-porosity relations, pore size distribution, permeability, degree of hydration and Ca(OH)2 content measurements were made. It was observed that the fly ash-cememt reaction occurred relatively early at 3 to 7 days and it was concluded that the cement matrix and residual unreacted fly ash form a good mechanical bond. |
| Keywords: | Fly ash concretes hydration chemical reactions porosity evaporable water permeability pozzolans calcium hydroxide mechanical properties compressive strength modulus of elasticity electron microscopy high-volume fly ash |
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