持続可能な道路建設のための砂・砂利・片麻岩骨材混合物の機械的・耐久性・カーボンフットプリント・経済性評価
Mechanical, Durability, Carbon Footprint, and Economic Assessment of Sand–Gravel–Gneiss Aggregate Mixtures for Sustainable Road Construction (原題)
Agnieszka Nowaczek, Joanna Kulczycka, Marek Bęben, Dariusz Kasperek, Zygmunt Kowalski, Agnieszka Makara, Natalia Generowicz
🤖 gxceed AI 要約
日本語
本研究は、道路建設用の砂・砂利混合物に砕いた片麻岩を10%、30%、50%混合し、機械的特性、耐久性、環境影響、経済性を評価した。片麻岩の含有量増加に伴いCBRや変形係数が向上し、70/30の混合物が最適なバランスを示した。カーボンフットプリントは3.90 kg CO2 eq./tで、ディーゼル消費が最大の排出源であり、輸送距離の短縮が低炭素化に有効であることを示した。
English
This study evaluates sand-gravel mixtures with 10%, 30%, and 50% crushed gneiss for road construction, assessing mechanical, durability, environmental, and economic performance. Increasing gneiss content improved CBR and deformation modulus, with the 70/30 mixture offering the best balance. Carbon footprint was 3.90 kg CO2 eq./t, with diesel consumption as the dominant source, highlighting transport reduction as key for lower-carbon materials.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の道路建設では、再生骨材や低炭素材料の利用が進んでおり、本研究成果は国内の建設業界におけるCO2排出削減策の参考となる。特に、輸送距離の最適化や骨材配合の選択は、日本の建設現場でも適用可能な実践的知見を提供する。
In the global GX context
This study contributes to global efforts to reduce embodied carbon in construction materials, aligning with ISSB and CSRD disclosure requirements for Scope 3 emissions. The cradle-to-site LCA approach and cost analysis provide a replicable framework for evaluating low-carbon aggregate alternatives, relevant for infrastructure projects worldwide.
👥 読者別の含意
🔬研究者:Provides empirical data on gneiss aggregate performance and LCA methodology for road construction materials.
🏢実務担当者:Offers actionable insights on optimizing aggregate composition to reduce carbon footprint while maintaining engineering performance.
🏛政策担当者:Highlights potential for low-carbon construction materials, informing procurement policies and emission reduction strategies.
📄 Abstract（原文）
This study evaluates the influence of different crushed gneiss contents on the mechanical, durability, environmental, and economic performance of sand–gravel/gneiss mixtures for sustainable road construction. Natural sand–gravel aggregate was blended with crushed gneiss at three proportions (10%, 30%, and 50% by mass). The experimental program included grain size analysis, compaction characteristics, California Bearing Ratio (CBR), deformation modulus, and freeze–thaw durability tests. Environmental performance was assessed using a cradle-to-site carbon footprint approach based on Life Cycle Assessment principles according to ISO 14040, ISO 14044, and ISO 14067, with the analysis focused on Global Warming Potential (GWP100), combined with a Total Cost of Ownership analysis. Increasing gneiss content improved mechanical performance, with CBR increasing from 45% to 95% and deformation modulus from 110 to 185 MPa. The 70/30 sand–gravel/gneiss mixture provided the most balanced performance among the investigated compositions, combining high bearing capacity, satisfactory freeze–thaw resistance, and favorable environmental and economic characteristics. Its carbon footprint was 3.90 kg CO2 eq./t, with diesel consumption during aggregate handling identified as the dominant emission source (69%), followed by gneiss transportation (20%) and electricity consumption (12%). Higher gneiss contents and longer transport distances increased environmental impacts and production costs. The results indicate that selecting an appropriate aggregate composition and reducing transport-related emissions can support lower-carbon construction materials while maintaining required engineering performance.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/ma19173679first seen 2026-09-02 04:56:23
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