高強度コンクリートを用いた実大柱部材の材齢15年における強度性状および中性化

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This paper describes a study on the long-term strength development and carbonation of high-strength concrete in full-scale models. Four types of full-scale columns were made of two high-strength concretes, which design strength were 60 and 100N/mm^2 (Fc60 and Fc100), respectively. Core specimens were drilled out of the columns at the age of 15 years. The compressive strength and carbonation depth of the core specimens were tested. As a result, the increase of strength from 91 days to 15 years was clearly recognized in both Fc60 and Fc100 concretes. The strength of core specimens taken from the center of the column was higher than that of core specimens taken from the corner of the column. The carbonation depth at 15 years is 0mm, in both Fc60 and Fc100 concretes. However, the consumption of Ca(OH)_2 and production of CaCO_3 were revealed by XRD analysis. C_3S and C_2S still remained in both Fc60 and Fc100 concretes at 15 years.
社団法人日本建築学会の論文
2008-09-30