Comparative Study on the Pozzolanic Activity of Fly Ash and Cinder Ash as Mineral Substitutes in Massive Concrete.
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Accession number;03A0178544
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| Title;Comparative Study on the Pozzolanic Activity of Fly Ash and Cinder Ash as Mineral Substitutes in Massive Concrete. |
| Author;
HASSAN K
(Tottori Univ., Tottori, Jpn)
HATTORI K
(Tottori Univ., Tottori, Jpn)
OGATA H
(Tottori Univ., Tottori, Jpn)
SATO S
(Tottori Univ., Tottori, Jpn)
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Journal Title;Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
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Journal Code:S0345A
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ISSN:0387-2335
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VOL.;NO.223;PAGE.57-62(2003)
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| Figure&Table&Reference;FIG.8, TBL.5, REF.14 |
| Pub. Country;Japan |
| Language;English |
| Abstract;This research was aimed to differentiate and evaluate the pozzolanic activity of fly ash and cinder ash on mechanical properties of massive concrete. Physical properties of both materials were very different but chemical compositions were similar. The replacement ratio of ordinary Portland cement(OPC) with fly ash was 30% and fine aggregate replacement with cinder ash was 10%. The fineness of fly ash particles was the main factor responsible for strength development of massive concrete while the coarser cinder ash had insufficient effect during the early age of the strength development. Results of pulse velocity revealed that the fly ash enhanced strength development than cinder ash. Moreover, the addition of fly ash favored a close relation between central and outer parts of massive concrete mechanical properties, which was similar to those of standard cured specimens. X-ray diffraction(XRD) and scanning electron microscopy(SEM) analyses showed that the fly ash had higher pozzolanic reaction than cinder ash. The combination of both materials in massive concrete had significant positive effect on strength development. The utilization of cinder ash as pozzolanic material could be acceptable when early strength development is not desired. (author abst.) |
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