フライアッシュを主原料とした高強度人工軽量骨材を用いたコンクリートの耐火性能

概要

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The effective use of fly ash has been actively studied in various fields, and it became clear that making concrete aggregates with fly ash should be one of the most effective way. We have developed "High Strength Artificial Aggregate" (hereinafter called FA aggregate) made of fly ash which has a dense structure and low water absorption. In this report, we studied on fireproofing performance of concrete using FA aggregate in comparison with those of concrete using natural aggregate (hereinafter called NA aggregate) and artificial lightweight aggregate in the market (hereinafter LA aggregate). To evaluate the fire resistance of concrete using FA aggregate, we conducted the fire test with specimen and fire test with RC concrete beam. Following test results are obtained. (1) In decreasing rates of compressive strength and elastic modulus of the small specimens after heating, there's little difference due to the type of aggregates. (2) The temperature of the central part in the RC concrete beam with FA aggregate is slightly higher than that of NA aggregate. (3) The deformation of the RC concrete beam with FA aggregate is somewhat larger than that with NA aggregate, but it does not exceed the limit. (4) It is confirmed that the concrete using FA aggregate has sufficient fire resistance compared with the concrete using NA aggregate.
社団法人日本建築学会の論文
2005-09-30