混和材を大量使用した低炭素コンクリートの港湾無筋ブロックへの適用に関する実験的検討と活用時の二酸化炭素排出量削減効果の試算

抄録

This paper deals with the applicability of low-carbon concrete with high-volume mineral admixtures to non-reinforced blocks in ports, mainly from the perspective of strength development. Also, the applicability of low-carbon, heavy-weight concrete incorporating high-volume copper slag fine aggregate (CUS) was investigated. The CO₂ emissions during the construction in the case that low-carbon concretes are applied to wave-dissipating blocks of a port breakwater were then calculated. The lower water-to-binder ratio required for the low-carbon concretes results in a beneficial effect for fresh properties in the case high-volume CUS is incorporated. When the low-carbon heavy-weight concretes are applied to the wave-dissipating block of a breakwater, it is possible to select a smaller block to keep the required weight of the block. Consequently, although the low-carbon heavy-weight concretes require a lower water-to-binder ratio to maintain their strength, the CO₂ emissions associated with the material production can be possibly reduced.