コンクリートの初期凍害耐力に及ぼす空気量の効果に関する研究 : 第 2 報・人工軽量骨材コンクリートの場合

概要

論文の詳細を見る
It is the aim of this study to undertake to provide comprehensive laboratory data on air entrainment which influence to early frost resistance of artificial lightweight aggregate concrete, and present the qualitative and quantitative entraining air which is valid and necessary to prevent the early frost damage of artificial lightweight aggregate concrete by comparing and investigating air content with the other factors influencing to frost damage of concrete at early ages. On the basis of these test conditions, the following observation and conclusions seem warrant and appropriate ; 1. The use of intentionally entrained air by air entraining agents and air entraining water reducing agents results in as an excellent effect in early frost resistance of artificial lightweight aggregate concrete as normal weight aggregate concrete. In case of artificial lightweight aggregate concrete, the adequate amount of intentionally entrained air was found to be 5 percent or more of nominal air content in placing concrete, which is enough capable to get the inferential strength ratio of 80 percent or more after 5 cycles of freezing and thawing, and it is very clear that there is a correlation between air content and early frost resistance of artificial lightweight aggregate concrete. 2. The water cement ratio gives comparatively a corresponding influence in early frost resistance of artificial lightweight aggregate concrete. 3. The influence of water content and kind and moisture content of aggregate are not to be compared with intentionally entrained air in the effect in early frost resistance of artificial lightweight aggregate concrete.
1978-04-30

コンクリートの初期凍害耐力に及ぼす空気量の効果に関する研究 : 第 2 報・人工軽量骨材コンクリートの場合

スポンサーリンク

概要

著者

関連論文

スポンサーリンク