低炭素バインダーを用いたセメントペーストバックフィルの強度とフレッシュ性状
Strength and Fresh Properties of Cemented Paste Backfill with a Low-Carbon Binder (原題)
Soya Bathily
🤖 gxceed AI 要約
日本語
本研究は、炭酸ナトリウム-水酸化ナトリウムで活性化した高炉スラグを低炭素バインダーとして用いたセメントペーストバックフィル（CPB）の性能を評価した。フレッシュ性状、強度発現、水和メカニズムを実験的に解明し、従来のOPBと同等の強度を達成しつつCO2排出を削減できることを示した。鉱山充填の低炭素化に貢献する。
English
This study evaluates cemented paste backfill (CPB) using alkali-activated slag with a Na2CO3-NaOH activator as a low-carbon binder. It reveals a two-stage hydration process linking fresh properties to strength development, achieving competitive strength versus OPC-based CPB while reducing CO2 emissions. The findings support low-carbon backfill operations in mining.
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
日本の鉱山業界では、廃棄物処理と炭素排出削減が課題であり、本研究成果は低炭素バインダーの実用化に寄与する。また、SSBJ開示やカーボンニュートラル政策に関連し、鉱山企業の環境対応に示唆を与える。
In the global GX context
Globally, the mining sector faces pressure to reduce carbon footprints. This research offers a low-carbon alternative to OPC in backfill, aligning with ISSB/CSRD disclosure trends and transition finance criteria. It provides empirical evidence for sustainable mining practices.
👥 読者別の含意
🔬研究者:Provides mechanistic insights into AAS-based CPB hydration and strength development, useful for further low-carbon binder research.
🏢実務担当者:Offers a viable low-carbon binder option for mine backfill, potentially reducing carbon footprint and meeting sustainability targets.
🏛政策担当者:Highlights a practical decarbonization pathway for the mining industry, relevant for policy on industrial decarbonization.
📄 Abstract（原文）
Cemented paste backfill (CPB) is widely used in underground mining to provide ground support and enable the safe disposal of tailings. Ordinary Portland cement (OPC), commonly employed as the binder in CPB, is associated with high energy consumption and significant CO₂ emissions, motivating the development of low-carbon alternative binders. Among these, alkali-activated slag (AAS) systems have shown strong potential; however, their application in CPB remains limited, particularly with respect to the coupled evolution of fresh properties, strength development, and hydration mechanisms. This thesis investigates the performance of CPB incorporating ground granulated blast furnace slag activated by a blended sodium carbonate-sodium hydroxide (Na₂CO₃-NaOH) system. An experimental program was conducted to evaluate the influence of activator composition and dosage on both fresh-state behavior and hardened properties. Rheological parameters, setting time, electrical conductivity (EC), volumetric water content (VWC), and matric suction were monitored to characterize early-age structuration and hydration kinetics. Unconfined compressive strength (UCS) was measured at multiple curing ages, and microstructural analyses, including X-ray diffraction were performed to link phase assemblage and pore structure to macroscopic performance. The results demonstrate that the Na₂CO₃-NaOH co-activation system governs CPB behavior through a two-stage hydration process, consisting of an initial ionization regime followed by accelerated gel formation and pore refinement. Fresh-state properties and early-age kinetics were found to be strongly coupled with long-term strength development. Compared to OPC-based CPB, the AAS systems exhibited competitive strength performance while offering significant potential for reducing the carbon footprint of backfill operations. Overall, this research provides an integrated understanding of the mechanisms controlling fresh and hardened behavior of AAS-based CPB and highlights the feasibility of sodium carbonate-sodium hydroxide activated slag as a low-carbon binder for underground mine backfill applications.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.20381/ruor-32163first seen 2026-08-23 04:45:16
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