低炭素コンクリートのためのオーストラリアのアップサイクル廃棄粘土の煆焼と機械的活性化
Calcination and Mechanical Activation of Australian Upcycled Waste Clays for Low-Carbon Concrete (原題)
Roshan Jayathilakage, Chamila Gunasekara, David Law, Sujeeva Setunge
🤖 gxceed AI 要約
日本語
本研究は、オーストラリアの天然廃棄粘土をセメント代替材料（SCM）として活用し、煆焼と機械的活性化の最適条件を検討。750℃・1時間の煆焼でGrade 1ポゾラン（SAI≥0.85）を達成し、高強度粉砕でGrade 2（SAI>0.75）を実現。比表面積と粘土鉱物含有量が反応性に影響することを示した。
English
This study investigates Australian waste clays as supplementary cementitious materials (SCMs) for low-carbon concrete. Optimal calcination (750°C, 1h) yields Grade 1 pozzolans (SAI≥0.85), while high-intensity grinding produces Grade 2 (SAI>0.75). Specific surface area and clay mineral content correlate with reactivity, offering practical guidance for sustainable 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
日本の建設業界ではセメント生産のCO2削減が急務であり、廃棄粘土のSCM活用は国産資源の有効利用と排出削減に寄与。本研究成果は、日本の粘土資源の特性評価と活性化プロセス最適化に応用可能で、低炭素コンクリートの普及に資する。
In the global GX context
Globally, the cement industry accounts for ~8% of CO2 emissions, and SCMs are key to decarbonization. This study provides empirical data on waste clay activation, supporting the adoption of low-carbon concrete in line with ISSB/CSRD climate disclosure and net-zero targets.
👥 読者別の含意
🔬研究者:Provides optimal activation parameters for waste clays, useful for SCM research and low-carbon concrete development.
🏢実務担当者:Offers actionable guidance for cement and concrete producers to utilize waste clays, reducing carbon footprint and material costs.
🏛政策担当者:Highlights the potential of waste clay SCMs to support national decarbonization goals and circular economy policies.
📄 Abstract（原文）
Abstract This study examines natural waste clays (in Australia) as supplementary cementitious materials (SCMs) for concrete. Seven mixed-layer waste clays were analyzed, investigating calcination and low-energy mechanical grinding as activation techniques. The influence of calcination temperature and the duration of calcination/mechanical activation on the chemical and physical characteristics of clays was investigated. Also, the reactivity of activated clays in blended cement systems was studied. All of the calcined clays achieved a comparable gain in strength to the control mix. Results highlight the optimal parameters for enhancing clay reactivity and complying with local Australian standards. The study revealed that in the absence of detailed clay characterization, a 750°C calcination temperature and a 1-h calcination duration can be used for Australian mixed-layer clays to achieve Grade 1 pozzolans with a strength activity index (SAI) ≥ 0.85 . Additionally, high-intensity grinding using a ring mill is a plausible alternative activation method to produce highly reactive clays (Grade 2 pozzolans with SAI > 0.75 ) consisting of lesser kaolinite content ( ≤ 5 % ). Increasing the calcination temperature above 600°C reduced the specific surface area, negatively impacting reactivity, even if amorphous content increased. The specific surface area and the total clay mineral content in calcined clay are proportional to the SAI. High specific surface area ( > 15 m 2 · g − 1 ) clays with low total mineral content ( ∼ 25 % ) can provide similar strength to a clay with high clay mineral content ( ∼ 50 % ) and low specific surface area ( < 15 m 2 · g − 1 ). In mechanically activated clays, the particle fineness is proportional to SAI.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1061/jmcee7.mteng-23431first seen 2026-08-23 04:45:30
🔔 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。