Effect of Thermally Activated Construction and Demolition Waste as Partial Cement Replacement on the Physical, Mechanical, and Durability Properties of Low-Carbon Concrete
熱活性化建設解体廃棄物の部分セメント代替が低炭素コンクリートの物理・力学・耐久性に及ぼす影響 (AI 翻訳)
Sandra Cunha, Kubilay Kaptan, Adelino Elias Chiaqui, J. L. Barroso de Aguiar
🤖 gxceed AI 要約
日本語
本研究は、ポルトガルのリサイクル施設から得た混合建設解体廃棄物（CDW）を熱活性化し、セメントの部分代替として低炭素コンクリートに利用する可能性を検討した。5%～35%の置換率でコンクリート試験体を作製し、密度、吸水率、圧縮強度、炭酸化・塩化物浸透抵抗性を評価。結果、熱活性化CDWは所要の性能を維持しつつセメント消費削減に寄与し、持続可能な材料としての有効性が確認された。
English
This study explores the use of thermally activated mixed construction and demolition waste (CDW) as a partial cement replacement in low-carbon concrete. Concrete mixtures with 5-35% replacement were tested for physical, mechanical, and durability properties. Results show that thermally activated CDW can maintain satisfactory performance while reducing cement consumption, demonstrating its potential as a sustainable supplementary cementitious material.
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
日本でも建設解体廃棄物（CDW）の有効活用と低炭素コンクリートへの関心が高まっている。本研究成果は、CDWの熱活性化処理によるセメント代替手法を示し、日本の建設業界における廃棄物削減と脱炭素化に示唆を与える。
In the global GX context
This paper provides empirical evidence for using thermally activated CDW as a supplementary cementitious material, aligning with global efforts to reduce embodied carbon in construction. The findings support circular economy principles and can inform low-carbon concrete standards and procurement policies.
👥 読者別の含意
🔬研究者:Provides benchmark data on the mechanical and durability performance of CDW-based SCMs, useful for further optimization and life-cycle assessment studies.
🏢実務担当者:Offers a viable mix design strategy for low-carbon concrete using locally sourced CDW, applicable to sustainable construction projects seeking to reduce cement usage.
🏛政策担当者:Supports waste-to-resource policies and low-carbon material mandates in construction, particularly for regions with abundant CDW.
📄 Abstract（原文）
The utilization of construction and demolition waste (CDW) as a supplementary cementitious material (SCM) represents a promising strategy for reducing cement consumption, minimizing environmental impacts, and promoting sustainable waste valorization. In this study, hybrid recycled powder was produced from mixed CDW obtained from a Portuguese recycling facility and processed through mechanical grinding to achieve particle size characteristics comparable to Portland cement. The ground powder was subsequently thermally activated at 600 °C and evaluated as a partial replacement for Portland cement in concrete. Concrete mixtures were prepared with recycled powder replacement contents of 5%, 15%, 25%, and 35%. The physical, mechanical, and durability properties of the concrete were investigated, including density, water absorption, compressive strength, carbonation and chloride penetration resistance. The results indicate that thermally activated recycled powder can be successfully incorporated as a partial cement replacement while maintaining satisfactory mechanical and durability performance. These findings demonstrate that thermally activated hybrid recycled powder derived from mixed CDW has significant potential as a sustainable SCM, contributing to reduced cement consumption and supporting the development of low-carbon concrete.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/buildings16122320first seen 2026-06-12 05:14:32
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