Fundamental study on carbon-footprint analysis for concrete structures

在日本，必须建立环保混凝土及其混凝土结构的资源保护体系。本研究采用几种水泥材料对碳化混凝土的基本性能进行了评价，并对混凝土材料的轨道运输或海运的碳足迹状况进行了评价。其次，研究了含二次建筑副产物（如回收骨料和固体石粉）的混凝土的基本性能，并对这些二次建筑副产物在混凝土中主动使用的环境影响进行了评价。最后，对混凝土骨料的运输状态条件进行了考虑，并与运输方式进行了比较，考察了运输距离、骨料质量体积和运输次数以及二氧化碳排放量。

In Japan, it would be essential to develop resource conservation system regarding environmental conscious concrete and its concrete structures.In this study, it was conducted the experiment for evaluating the fundamental properties of carbonated concrete using some kinds of cement materials and the conditions of carbon-footprint of transportation of concrete materials by track or shipment. Next, the fundamental properties of concrete fully contained of secondary construction byproducts such as recycle aggregates and solid stone powders were investigated and the environmental effect evaluation under practicing the proactive use of these secondary byproducts in concrete was evaluated. Finally, the state conditions of transportation on concrete aggregate to be considered transported distances, aggregate mass volume and number of times of transportation and CO2 emissions in comparison with the transportation ways were investigated.