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- Title
CONSTRUCTION PLACEMENT AND HARDENED PROPERTIES OF SHOTCRETE WITH HIGHLY FUNCTIONAL FLY ASH.
- Authors
YUNO, KUNIHIRO; ISHII, MITSUHIRO; HASHIMOTO, CHIKANORI; MIZUGUCHI, HIROYUKI
- Abstract
Shikoku Electric Power Co., Inc. has developed the technology to manufacture a brand name "Finash" about 12 years ago, by sorting and classifying coal ash generated in coal fired power plants. "Finash" is highly functional fly ash (HFA) is produced by removing irregular coarse particles. It is important for the production of HFA to minimize the variation in quality of coal ash with sophisticated classification technique and extracting good-quality spherical fine particles. It is now widely utilized as concrete admixture for general civil engineering structures and buildings in Japan. When highly functional fly ash (HFA) is used as shotcrete admixture to substitute for fine aggregate of 100kg/m3, the shotcrete has the advantages of decreasing the amount of dust and rebound during spraying operation, improving the hardened properties of concrete, etc. Therefore, it has been applied in many tunnel construction projects. This paper discusses about the various characteristics such as construction placement, strength, neutralization and dry shrinkage of shotcrete using highly functional fly ash (HFA), using the results that is obtained from spray test in an actual road tunnel.
- Subjects
SHOTCRETE; FLY ash; MAGNESIUM alloys; MICROFILMS; CORROSION &; anti-corrosives; X-ray diffraction; SALT
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2010, Vol 24, Issue 15/16, p2472
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979210065118