Low-Carbon Cementitious and Alkali-Activated Materials for Roadbed Stabilization: A Review from Microstructural Mechanisms to Engineering Adoption
低炭素セメント系およびアルカリ活性材料による路盤安定化：微視的機構から工学的採用へのレビュー (AI 翻訳)
Kangqi Ma, Lei Qin, Huilin Kong, J Q Liu, Wenqian Sang, Changmei Liao, Mingdong Yu
🤖 gxceed AI 要約
日本語
本レビューは、道路路盤安定化のための低炭素材料（アルカリ活性地盤ポリマー、低クリンカーカルシウム系複合材料など）を、強度、微細構造、耐久性、ライフサイクル評価の4段階のエビデンスチェーンで体系的に評価。12回の湿潤乾燥/凍結融解サイクル後の強度保持率60～85%、レジリエントモジュラス向上30～120%を定量化し、活性剤輸送や前処理を含めると地盤ポリマーの炭素削減優位性が60%から20%以下に縮小することを示した。工学的採用の障壁は高性能配合の不在ではなく、標準化された設計パラメータと現場実証データの不足にあると結論。
English
This review systematically evaluates low-carbon materials (alkali-activated geopolymers, low-clinker calcium composites) for roadbed stabilization using a four-level evidence hierarchy: strength, microstructure, durability, and life-cycle assessment. Quantitative synthesis shows strength retention of 60-85% after 12 wet-dry/freeze-thaw cycles, resilient modulus improvement of 30-120%, and that geopolymer carbon advantages shrink from 60% to ≤20% when activator transport and pretreatment are included. The main barrier to adoption is lack of standardized design parameters and field validation, not absence of high-strength formulations.
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
本論文は、日本の建設・インフラ分野における脱炭素化に貢献する。特に、国土交通省の低炭素型建設材料推進やSSBJの建設セクター開示基準と連動し、路盤工事でのCO2排出量削減に資する。
In the global GX context
This review addresses the global challenge of decarbonizing the construction sector, which accounts for ~8% of CO2 emissions. It provides a framework for life-cycle carbon accounting that aligns with ISSB and CSRD requirements for infrastructure and material disclosures.
👥 読者別の含意
🔬研究者:Provides a comprehensive evidence chain hierarchy for testing low-carbon materials, enabling more rigorous experimental design and comparative studies.
🏢実務担当者:Offers quantitative performance ranges (strength, durability) and decision-support framework for selecting roadbed stabilizers with lower carbon footprint.
🏛政策担当者:Highlights the need for standardized construction protocols and field demonstration projects to accelerate adoption of low-carbon alternatives.
📄 Abstract（原文）
Problematic subgrade soils degrade pavement performance, while conventional cement/lime stabilizers generate excessive carbon emissions. Unlike earlier reviews that focus on single-material systems—such as industrial by-products, alkali-activated binders for expansive soils, or geopolymers for pavement applications—an integrated framework spanning reaction mechanisms, microstructural evolution, engineering parameterization, and life-cycle validation is proposed The work offers three distinctive contributions: (i) a four-level evidence chain hierarchy (strength → microstructure → durability → leaching/LCA) to grade research completeness; (ii) repositioning resilient modulus, permanent deformation, and pore-connectivity evolution as core engineering outputs bridging material design and structural response; and (iii) a comparative assessment of alkali-activated geopolymers, low-clinker calcium-based composites, and multi-scale reinforcement strategies under consistent durability and environmental boundaries. Quantitative synthesis reveals the following: strength retention after 12 wet–dry/freeze–thaw cycles ranges from 60% to 85%; resilient modulus improvements over untreated soils reach 30%–120%, yet stress-dependent characterization remains essential; leaching concentrations of hazardous elements (Cr, Ba, Pb) can increase by 50%–200% after durability cycling if pore connectivity rebounds. Life-cycle carbon comparisons are boundary-sensitive—geopolymer advantages shrink from 60% to ≤20% when activator transport and pre-treatment are included. We conclude that the primary barrier to engineering adoption is not the absence of high-strength formulations, but the lack of extrapolatable design parameters and closed-loop evidence chains. A decision-support framework incorporating durability retention, leaching safety, carbon footprint, and field validation is proposed to guide robust design and industrial scaling. Critically, the review identifies that engineering adoption is constrained not by the absence of high-strength formulations, but by the lack of standardized construction protocols, quality control procedures, and long-term field performance data—gaps that must be addressed through coordinated field-scale demonstration projects.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/coatings16070841first seen 2026-07-18 05:38:07
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