レディーミクストコンクリートの圧縮強度の季節変動に関する調査・研究(材料施工)

概要

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In order to know the seasonal variations of compressive strengths of ready-mixed concrete, test data on 7 day and 28 day standard cured compressive strengths of ready-mixed concrete obtained in three years from Jan. 1999 to Dec. 2001, were analyzed and discussed comparing with the past data in the literature. Concretes were made of Normal Portland cement and Type B Portland blast-furnace slag cement. The data indicated specified design strength increased linearly, the rate of increment being 1 N/mm^2 in 5 years. Standard cured compressive strengths affected with seasonal was remarkable ; standard cured compressive strengths at 28 days were 1.25 times of Nominal strength in summer, and 1.5 times in winter. The reductions in strengths in summer are considered to be affected with the increase of water content to compensate slump loss.
社団法人日本建築学会の論文
2003-12-20