The fluidity of fly ash-cement paste with superplasticizer |
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| Authors: | S Nagataki E Sakai T Takeuchi |
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| Affiliation: | Dept. of Civil Eng., Tokyo Institute of Technology Ookayama, Meguroku, Tokyo, Japan;Central Research Lab., Denki Kagaku Kogyo Co., Ltd., Japan;Tsukuba Central Research Lab., Fujisawa Pharmaceutical Co., Ltd., Japan |
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| Abstract: | The influence of various fly ashes on the fluidity of fly ash-cement paste with superplasticizer was investigated in connection with the amounts of superplasticizer adsorbed on fly ashes, the change of ζ-potential and the physical properties of fly ashes. Fly ash indicates a high negative ζ-potential, and by adding superplasticizer, an even higher negative ζ-potential is indicated. However, the fluidity of fly ash paste is not improved by addition of superplasticizer as much as in the case of cement. The fluidity of fly ash-cement paste mixed with superplasticizer is influenced by the kinds of fly ashes. The bulk specific gravity of fly ash may be an index for judging the influence of fly ash on the fluidity of fly ash-cement paste. |
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