Properties of shotcrete with highly functional fly ash K. Yuno

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Properties of shotcrete with highly functional fly ash
used as dust-reducing agent
K. Sasaki, M. Ishii & Y. Butou
Coal Ash Recycle Project Group, Shikoku Electric Power Co., Inc., Japan
K. Yuno
Yonden Business Co., Inc., Japan
ABSTRACT: Shikoku Electric Power Co., Inc., has developed the technology to manufacture a brand
name “FINASH” about 10 years ago, by sorting and classifying coal ash generated in coal fired power
plants. “FINASH” is highly functional fly ash which is produced by removing irregular coarse
particles, a key factor causing variation in quality of coal ash, with sophisticated classification
technique and extracting good quality spherical fine particles. It is now utilized as concrete admixture
for civil engineering structures and buildings. The concrete with highly functional fly ash has some
advantages of enhancing long-term strength development and improving durability and workability.
Thus, it has been used in many construction works executed by Ministry of Land, Infrastructure and
Transport and West Nippon Expressway Company Limited(the old Japan Highway Public Corp)and
so on. In this paper, properties (workability, strength development and durability) of concrete with
highly functional fly ash used as dust-reducing agent are described.
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