高炉スラグ微粉末を用いたコンクリートの各種力学特性に及ぼす石灰石微粉末と湿潤養生の影響

摘要

This paper presents of the results of the experimental study on quality improvement of the concrete using ground granulated blast furnace slag by limestone powder. We focused on the influence of limestone powder contents on restraint drying shrinkage and strength development of concrete under several curing conditions. As the results, the compressive strength of BLP and BLP10 (LSP 10%) are equivalent to that of BB, and that of BLP is insusceptible to demolding time compared with BB. The filling effect of LSP increased young's modulus and splitting tensile strength. The time of crack is affected by rate of decrease in mass of concrete.%本研究では，高炉セメントを用いたコンクリートの強度発現性，ひび割れ抵抗性に対する石灰石微粉末の効果ならびに湿潤養生の影響について検討を行った.得られた結果を以下に記す．（1）石灰石微粉末を添加した場合，10％の場合は高炉セメントB種相当と比較して強度発現の差は小さく，20％添加するとやや強度の低下がみられた.また，BS/Binder比は小さいほうが強度発現は大きい．