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ASTM C 1260によるフライアッシュ含有モルタルの安山岩に対するASR抑制効果の評価

フォーマット:
論文
責任表示:
広野, 真一 ; 鳥居, 和之
言語:
日本語
出版情報:
日本材料学会 The Society of Materials Science, Japan, 2013-01-01
著者名:
掲載情報:
材料 = Journal of the society of materials science, Japan
ISSN:
0514-5163  CiNii Research  Webcat Plus  JAIRO
巻:
62
通号:
8
開始ページ:
498
終了ページ:
503
バージョン:
publisher
概要:
Volcanic rocks such as andesite have popularly been used for aggregates in the Hokuriku District. Therefore, the andesitic aggregates have contributed to a steady occurrence of alkali-silika reaction (ASR) in concrete. Taking into account the effective utilization of local materials, so-called “Chisan-chisho”, both the reduction in the environmental impact and the rationalization of natural resources, positive countermeasures for mitigating ASR by using blended cements with fly ash (FA) or blast-furnace slag (BFS) are most expected. This paper examines the mitigating effects of mineral admixtures on ASR of mortars by the accelerated mortar-bar test (ASTM C 1260). As the result of test, the replacement with FA or BFS at normal percentages recommended by JIS A 5308 decreased significantly the expansion of mortar bars using reactive andesitic aggregates in the Noto peninsula. Especially, a high-quality fine FA produced in the Hokuriku District is hopeful in its practical use of concrete mixtures. Furthermore the ASR mitigating effects by mineral admixtures are assessed with a good performance by the test method “ASTM C 1260”. 続きを見る
URL:
http://hdl.handle.net/2297/39279
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