A STUDY ON MIXTURE DESIGN AND QUALITY CONTROL METHOD OF HIGH FLY ASH CONCRETE

Autor: Tatsuo Suzuki, Shigeyoshi Nagataki, Kazuto Fukudome, Mamoru Sakamoto, Tatsuo Kita
Rok vydání: 2001
Předmět:
Zdroj: Doboku Gakkai Ronbunshu. 2001:99-108
ISSN: 1882-7187
0289-7806
DOI: 10.2208/jscej.2001.669_99
Popis: A mixture of fly ash and cement with a water to powder ratio close to the optimum moisture content has the characteristics of a wet powder immediately after mixing. After a few minutes of vibration compaction, however, the wet powder becomes fluidized and can be adequately compacted. By using this fluidization phenomenon in the manufacting process, the water to powder ratio and cement can be reduced. This in turn improves the quality and cost efficiency of high fly ash concrete. In this study, the authors investigate methods of mixture design and quality control for such high fly ash concrete. The work demonstrates that an optimum mixture can be determined through flow tests on fly ash, while the quality of high fly ash concrete can be controlled in terms of fluidization time.
Databáze: OpenAIRE