EFFECTS OF CURING CONDITION FOR THE STRENGTH PROPERTIES OF LOW CARBON CONCRETE

This report describes an experimental study about the influence of the curing conditions about the strength development of concrete containing admixtures materials high, which is namely the concrete of the low carbon type largely reduced a CO2 emission. The results of the study are as follows: the concrete which substituted admixtures high has higher temperature dependence of the strength development than normal concrete. The wet curing in early age is necessary to secure a long-term strength development. The temperature dependence of the strength development was judged from a result that the strength and accumulated temperature of this experimental results demanded from an analysis are correlated small. In addition, about the concrete which substituted admixtures high, the following results were obtained. In the case of air curing, strength development is small. However, in case of cured in water more than three days in early material age then cured in air, the strength development was same as water curing and sealed curing in a long age. In case of sealed curing, the strength development was equal to water curing. In case of water curing and sealed curing, and in curing temperature is high, the early strength development is big, but the long age strength development is not remarkable. On the other hand, if curing temperature is low, the early strength development is small, but the long age strength development is big. This tendency a mixed ratio of cement of 15％ is remarkable.本研究は、CO 2 排出量を大幅に削減した低炭素型のコンクリートを対象とし、混和材を高含有したコンクリートの強度発現性に及ぼす養生条件の影響を把握することを目的に、実験的に検討した。その結果、混和材を高置換することで、通常のコンクリートよりも強度発現に対する温度依存性が大きくなること、長期的な強度の増進を確保するためには材齢初期に十分な湿潤養生を実施する必要があることなどを明らかにすることができた。