サウジアラビアの低炭素産業発展に向けた再生材料と持続可能な建設化学品

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🔬研究者:建設材料の低炭素化と循環経済を統合する研究設計やLCA手法に関心がある研究者に有用。

🏢実務担当者:建設・化学メーカーのサステナビリティ担当が、再生材料と混和剤の組み合わせによる炭素削減と耐久性確保の実務指針を得られる。

🏛政策担当者:建設分野の脱炭素調達基準や材料パスポート制度を設計する政策担当者に、性能規定型アプローチの具体例を提供する。

Saudi Arabia’s industrial growth offers two key materials challenges: reducing the embodied carbon of construction and diverting mineral, glass, polymeric, metallurgical, and construction-and-demolition waste from disposal. This review analyzes how recycled materials and sustainable construction chemicals can be integrated as a unified low-carbon strategy, rather than as separate innovations. It synthesizes 2020–2025 literature on recycled aggregates, recycled powders and glass, supplementary cementitious materials, alkali-activated binders, limestone-calcined-clay systems, and performance-enhancing chemicals such as polycarboxylate superplasticizers and corrosion inhibitors. The review focuses on the Saudi context, where high temperatures, chloride-rich coastal environments, long transport distances, rapid project schedules, and evolving circular-economy goals influence the balance between the laboratory results and real-world implementation. Results show that carbon reduction is greatest when high-volume mineral substitution is combined with admixtures that maintain workability, reduce water demand, manage durability risks, and extend service life. While recycled aggregate reduces demand for natural resources, it can increase porosity and binder requirements; therefore, effective treatment, grading, and use of low-clinker binders are essential. Waste glass and finely processed demolition powders can serve as aggregates or reactive components, but particle size, alkali-silica reaction control, and source consistency are critical. Alkali-activated and limestone-calcined-clay binders enable further clinker reduction, making chemical compatibility increasingly important as binder chemistry differs from ordinary Portland cement. A successful Saudi transition ought to prioritize performance-based specifications, regional material passports, verified life-cycle assessments, local beneficiation infrastructure, and procurement policies that reward whole-life carbon reduction rather than nominal recycled content. The paper concludes with a governance framework that links waste streams, binder design, chemical admixtures, durability qualification, and industrial-scale deployment.

• openalex https://doi.org/10.64388/irev10i3-1723549first seen 2026-10-02 04:49:48