Regenerative earthen materials for urban climate action: from circular construction to climate-resilient envelopes and urban adoption
都市気候変動対策のための再生型土系建材：循環型建設から気候レジリエントな外皮と都市導入へ (AI 翻訳)
Anya Montserrat Pulido Cavada, Federico de Isidro Gordejuela, Juan M. Ros-García, R. Gonzalez-lezcano
🤖 gxceed AI 要約
日本語
本レビューは、都市の気候変動対策における土系建材の可能性を、材料・建築・都市スケールで多角的に検討する。非安定化土、安定化土、バイオベース複合材等の性能比較、受動的熱性能、および普及障壁（規制・認証・サプライチェーン・文化的認識）を整理。組積造の壁のU値は0.45-0.80 W/m2K程度、伝統的な厚肉壁では0.18-0.55 W/m2Kと報告。低環境負荷の安定化、プレファブ、デジタル製造、性能評価、実証実験、政策への組み込みなどを今後の方向性として示す。
English
This critical review examines earthen and bio-based construction materials for urban climate action across material, building, and urban scales. It compares unstabilized and stabilized earth, noting overlaps and trade-offs, and reports typical U-values of earthen walls (0.45-0.80 W/m2K for standard, 0.18-0.55 for massive vernacular). Key barriers include regulatory gaps, certification, supply chains, and perceptions. Future opportunities lie in low-impact stabilization, prefabrication, digital manufacturing, and integration of embodied-carbon metrics into policy.
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
日本では建設分野の脱炭素が急務であり、特に躯体や外壁の環境負荷低減が求められている。本レビューは土系建材の受動的熱性能や炭素固定ポテンシャルを系統的に整理しており、日本のゼロエネルギーハウスや木造と組み合わせた複合構法への示唆を与える。また、性能評価や認証に関する障壁は日本の建築基準法やJIS規格の改善にも関係する。
In the global GX context
Globally, the construction sector's embodied carbon is receiving increasing attention, and earthen materials offer a low-carbon alternative. This review consolidates performance data and identifies barriers to adoption, providing a reference for policymakers and practitioners aiming to integrate circular construction into building codes and urban climate strategies. The paper's focus on regulatory gaps and certification challenges is relevant to emerging frameworks like the EU's Level(s) and the proposed circular economy standards.
👥 読者別の含意
🔬研究者:Provides a comprehensive overview of earthen material performance and barriers, useful for those studying sustainable construction or building physics.
🏢実務担当者:Offers data on thermal and structural performance that can inform material selection and design, though adoption challenges are noted.
🏛政策担当者:Highlights regulatory and certification gaps that need addressing to enable mainstream use of earthen materials in urban climate action.
📄 Abstract（原文）
Urban areas face escalating climate risks, resource scarcity, and environmental degradation, increasing the need for construction approaches that reduce life-cycle impacts while improving urban resilience and well-being. This critical review examines earthen construction and bio-based or bio-derived earthen composites through a multiscale perspective spanning material, building, and urban integration. It focuses on three interrelated dimensions: (a) the potential of earthen systems to reduce embodied carbon and support circular construction; (b) their contribution to passive performance through hygrothermal behaviour, including thermal inertia, moisture buffering, and indoor comfort; and (c) the barriers and enabling conditions affecting their adoption in contemporary urban contexts. The review distinguishes between unstabilized earth (UE), stabilized earth (SE), hybrid bio-based composites, and emerging techniques such as poured earth, and consolidates comparative ranges for compressive strength, thermal conductivity, dry density, and moisture-related behaviour. Evidence indicates that UE and SE occupy overlapping but differentiated performance domains, with stabilisation often improving strength, cohesion, and water resistance, while potentially increasing density, thermal conductivity, embodied impacts, and loss of reversibility. Earthen wall systems can also achieve competitive thermal transmittance without additional insulation, with typical U-values ranging from approximately 0.45 to 0.80 W/m 2 ·K and massive vernacular typologies reaching about 0.18 to 0.55 W/m 2 ·K. Beyond technical performance, the literature identifies regulatory gaps, certification and insurance barriers, fragmented supply chains, labour and training constraints, and persistent cultural perceptions as major obstacles to mainstream adoption. The review highlights opportunities to advance regenerative earthen design through low-impact stabilisation, prefabrication, digital manufacturing, performance-based validation, monitored demonstrators, and the integration of embodied-carbon and circularity metrics into urban policy and procurement. At the urban scale, earthen materials represent a promising but still insufficiently quantified field of climate-adaptation research, requiring further field evidence and coupled building-urban studies.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3389/frsc.2026.1845364first seen 2026-06-29 06:52:27
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