Low-carbon expansive soil stabilisation using magnesium-activated industrial by-products
低炭素マグネシウム活性化産業副産物を用いた膨張性土壌の安定化 (AI 翻訳)
Hafiz Muhammad Alamgir, Badee Alshameri
🤖 gxceed AI 要約
日本語
本研究は、低炭素な水酸化マグネシウムで活性化した米糠灰とシリカフュームという2つの産業廃棄物を用いて、膨張性粘土を安定化する手法を提案する。最適添加率での処理により、一軸圧縮強度が最大320%向上し、膨潤ポテンシャルが99.5%減少するなど、土質特性が大幅に改善された。微視的分析により、マグネシウムシリケート水和物とマグネシウムアルミネート水和物のゲル形成が強化メカニズムであることを確認した。これは廃棄物を有効活用し、低炭素で持続可能な地盤改良技術を提供する。
English
This study presents a low-carbon method to stabilize expansive clay using magnesium hydroxide-activated industrial wastes (rice husk ash and silica fume). Treated soil showed up to 320% increase in compressive strength and 99.5% reduction in swelling potential. Microstructural analysis revealed formation of magnesium silicate hydrate and aluminate hydrate gels. The approach valorizes waste and offers a sustainable, low-carbon alternative for 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
日本の建設分野では、低炭素材料への関心が高まっている。本研究成果は、セメント代替として産業副産物を活用する日本政府のグリーン成長戦略や、建設廃棄物削減政策に資する可能性がある。ただし、日本の土壌条件への適用にはさらなる適応研究が必要。
In the global GX context
Globally, the construction industry seeks low-carbon binders to reduce emissions. This study demonstrates a novel stabilization technique using industrial by-products, contributing to waste valorization and carbon reduction in geotechnical engineering. It aligns with ISSB and TCFD frameworks by promoting sustainable materials in infrastructure projects.
👥 読者別の含意
🔬研究者:Provides a new binder system for soil stabilization using low-carbon activators, opening avenues for further optimization and field trials.
🏢実務担当者:Offers a potential low-carbon alternative for treating expansive soils in construction projects, reducing environmental impact.
🏛政策担当者:Highlights a waste-valorization approach that could inform green procurement policies and low-carbon construction standards.
📄 Abstract（原文）
This study presents a novel, sustainable stabilisation method that alkaline-activates two industrial wastes, rice husk ash (RHA) and silica fume (SF), using low-carbon magnesium hydroxide (Mg(OH)2). The aim is to transform these waste materials into effective binders for enhancing the strength and durability of expansive clay. The soil was treated with optimal dosages of additives (11% RHA and 7% SF, each with 3% magnesium hydroxide) and subjected to a series of geotechnical tests including unconfined compressive strength (UCS), swell potential, consolidation, and Atterberg limits after 7 and 28 days of curing. Microstructural changes were analysed using X-ray-diffraction, X-ray-fluorescence and scanning-electron-microscopy. The results demonstrated a remarkable improvement in soil properties: UCS increased by 320% and 210% for RHA and SF mixtures, respectively, after 28 days. The plasticity index was reduced by 54% (RHA) and 48% (SF), while swelling potential was nearly eliminated (up to 99.5% reduction). Compressibility also decreased significantly by 71% and 89%. Microstructural analysis confirmed that these enhancements are due to the formation of magnesium silicate hydrate and magnesium aluminate hydrate gels, which densify the soil matrix and refine its pore structure. This research successfully establishes a low-carbon, waste-valorising approach for transforming expansive soils into a stable construction medium.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1680/jenge.25.00172first seen 2026-05-17 05:37:49
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。