Development of geopolymer with red mud, fly ash, calcium carbide slag, and phosphogypsum as a step toward low-carbon building materials.
レッドマッド、フライアッシュ、カルシウムカーバイドスラグ、リン石膏を用いたジオポリマーの開発：低炭素建築材料への一歩 (AI 翻訳)
Han Sun, Xiaowei Xie, Mingxing Xie, H. Pu
🤖 gxceed AI 要約
日本語
本研究は、市販のアルカリ活性剤を用いずに、フライアッシュ、レッドマッド、リン石膏、カルシウムカーバイドスラグからなる四成分系ジオポリマーを開発した。水養生で28日圧縮強度14.09MPa、封かん養生で33%向上。重金属溶出は中国規制値を下回り、環境安全性を確認。複数の産業廃棄物を利用した低炭素セメント代替材料を提案。
English
This study develops a clinker-free geopolymer using fly ash, red mud, phosphogypsum, and calcium carbide slag without commercial alkali activators. Under sealed curing, 28-day compressive strength increases by 33% to 14.09 MPa. Leaching tests confirm environmental safety. The work offers a scalable, low-carbon alternative to conventional cement using multiple industrial wastes.
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、石炭灰やレッドマッドなどの産業廃棄物の有効活用が課題。本研究成果は、SSBJや統合報告書でのScope 3削減（建材由来）に貢献しうる技術的選択肢を示す。ただし、日本国内での適用には国内規制や材料特性の検証が必要。
In the global GX context
Globally, this research aligns with the push for low-carbon construction materials, a key component of net-zero transitions under frameworks like the Paris Agreement and ISSB standards. By eliminating commercial alkali activators, it reduces both cost and carbon footprint, offering a scalable solution for countries with abundant industrial waste.
👥 読者別の含意
🔬研究者:Provides a novel quaternary geopolymer composition that could inspire further optimization for different waste streams and curing conditions.
🏢実務担当者:Demonstrates a pathway to produce low-carbon concrete from on-site industrial wastes, potentially reducing raw material costs and Scope 3 emissions for construction firms.
🏛政策担当者:Highlights the potential of industrial symbiosis for decarbonizing the building sector, which could inform waste management regulations and green procurement policies.
📄 Abstract（原文）
Developing geopolymer materials as sustainable alternatives to traditional cement-based products has become a major research focus in the field of green construction materials. However, conventional geopolymers typically depend on commercial alkali activators, which increase both cost and carbon emissions and hinder large-scale application. To address this limitation, this study developed a low-carbon, clinker-free quaternary geopolymer using fly ash, red mud, phosphogypsum, and calcium carbide slag-without the need for commercial alkali activators. The mechanical performance of quaternary geopolymer mortars was investigated under various mix proportions and curing conditions, and the fluidity, microstructural characteristics, and leaching behavior of selected samples were further examined. When the dosage of phosphogypsum and calcium carbide slag was both 15%, the mortar fluidity reached 175 mm. Under water curing, the 28-day compressive strength reached 14.09 MPa. Sealed curing enhanced the matrix densification by promoting the formation of C-(A)-S-H gel and AFt, resulting in a 33% increase in the 28-day compressive strength. High-temperature sealed curing was found unsuitable for this system. Microstructural analyses confirmed the synergistic effects of hydration products, which filled pores and reduced overall porosity. Leaching tests showed heavy metal concentrations well below Chinese regulatory limits, ensuring environmental safety. This study establishes a novel quaternary geopolymer system prepared without commercial alkali activators, enabling synergistic utilization of multiple industrial wastes and offering a scalable, low-carbon alternative to conventional cement materials.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1016/j.wasman.2026.115436first seen 2026-06-29 06:48:51
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