Environmental performance indicators for concrete containing high volume of recycled materials (特集 持続可能な都市システムの構築をめざして(ICUS)) Environmental performance indicators for concrete containing high volume of recycled materials

　本研究では, 異なるリサイクル材料を組み合わせてコンクリートに混入させる事が, コンクリートの力学的性能や環境性能に与える影響を実験的に検討した．力学的性能に環境影響による重みを加えることで, 環境性能評価指標による結果が得られた．多量のポルトランドセメントをフライアッシュに変換する事により, 二酸化炭素排出量が大幅に削減され, 環境性能を向上させる事が確認された．また, 普通骨材を再生骨材に変換する事による二酸化炭素排出量に違いは見られず, 明確な効果を確認する事はできなかった．［本要旨はPDFには含まれない］

       This experimental research work was conducted to determine how combining different recycled materials in concrete would affect the mechanical and environmental performance. Results were given in terms of environmental performance indicators, which weight the mechanical performance by the environmental impact. It was found that replacing high volumes of Portland cement with fly ash, which significantly reduces CO2 emissions, improved the environmental performance. The benefit of replacing normal aggregates with recycled aggregates could not be clearly seen, as these materials have similar CO2 emissions. [This abstract is not included in the PDF]