Advancing Circularity in Stone Slurry Waste: Opportunities for Reuse as a Sustainable Filler in Cement-Based Materials
石材スラリー廃棄物の循環性向上：セメント系材料の持続可能なフィラーとしての再利用機会 (AI 翻訳)
Chang-jun Zhong, Zhaofeng Chen, A. Speroni, Mingyuan Qin
🤖 gxceed AI 要約
日本語
天然石のスラリー廃棄物（年間約6,350万トン）をセメント系材料のフィラーとして再利用する可能性をレビュー。炭酸塩スラリーは高純度でセメント置換率10-15%、骨材置換20-40%で強度向上が可能。シリケートスラリーも同様の効果があるが重金属管理が必要。先進的な粒子充填設計により低セメントコンクリートで31.6MPaを達成しCO2排出削減に貢献。廃棄物を副産物と再定義し、循環型建設を促進。
English
This review explores the reuse of stone slurry waste (63.5 million tons/year) as a sustainable filler in cement-based materials. Carbonate slurries with high CaCO3 purity can replace 10-15% cement or 20-40% fine aggregate, enhancing compressive strength by up to 12%. Silicate slurries offer similar benefits but require heavy metal management. Advanced particle-packing designs enable low-cement concrete achieving 31.6 MPa, reducing CO2 emissions. Reclassifying slurry as a co-product promotes circularity in construction.
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
日本では建設廃材のリサイクルが進んでいるが、石材スラリーのセメント代替利用はまだ一般的ではない。本論文は、セメント産業におけるCO2削減策として、副産物の規格化とライフサイクル評価の重要性を示しており、日本の建設GX政策（グリーン購入法、低炭素コンクリート普及）に関連する。
In the global GX context
This paper provides a global synthesis on stone slurry valorization in cement, directly relevant to construction sector decarbonization. It offers quantitative benchmarks for cement replacement ratios (10-15%) and strength improvements, informing life-cycle assessment and circular economy strategies. The findings support ISSB and TCFD-aligned disclosure on material circularity for construction firms.
👥 読者別の含意
🔬研究者:This paper compiles global data on stone slurry properties and reuse performance, providing a reference for further optimization of cement replacement formulations.
🏢実務担当者:Construction material manufacturers can use the substitution ratios (10-15% cement replacement) and mix design methods to reduce clinker content and lower product carbon footprint.
🏛政策担当者:Policymakers can leverage the evidence on slurry waste reduction to update standards on recycled materials in construction and incentivize circular practices.
📄 Abstract（原文）
Natural stones have served as essential building elements since ancient eras, maintaining their relevance in contemporary urban development and high-rise structures. Over recent years, the dimension stone industry generates approximately 63.5 million tons of slurry waste annually, representing 20% of processed material and posing significant environmental challenges such as land degradation and water contamination. This review synthesizes global production data, physical-chemical characterizations, and reuse pathways for stone slurry, focusing on its valorization as a sustainable filler in cement-based materials. Key findings include: carbonate slurries (CS) exhibit high purity (>95% CaCO3) and fine particle sizes (d50 ~10–25 μm), enabling 10–15% cement replacement or 20–40% fine aggregate substitution to enhance compressive strength (up to 12% increase) and durability via microstructural densification. Silicate slurries (SS) offer similar benefits but require contaminant management (e.g., heavy metals < 10 ppm). Advanced particle-packing mix designs, such as the cyclic method for low-cement concrete (LCC) and a novel approach for high-strength concrete (HSC), minimize cement content while achieving targets like 31.6 MPa strength, reducing CO2 emissions. In conclusion, reclassifying slurry as a co-product promotes circularity; future efforts should prioritize standardization, contaminant treatments, and lifecycle assessments to integrate high-volume reuse in construction, fostering a low carbon built environment.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.53941/ubs.2026.100010first seen 2026-06-29 07:09:40
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