炭素ネガティブ建築のためのヘンプクリートの性能：密度、圧縮強度、耐久性および炭素隔離
Performance of hempcrete for carbon-negative construction: Density, compressive strength, durability and carbon sequestration (原題)
Kari Steyn, Wibke De Villiers, Adewumi John Babafemi
🤖 gxceed AI 要約
日本語
建設業のGHG排出削減に向け、炭素ネガティブ建材ヘンプクリートの性能を評価した研究。硫酸カリウムをバインダーの3%代替することで圧縮強度が向上し、乾燥収縮と初期吸水が抑制された。ライム・メタカオリン系の2配合を比較し、クレードル・トゥ・ゲートで負の純GHG排出（-0.47〜-0.49 kg CO2e/試験体）を確認した。
English
This study evaluates hempcrete as a carbon-negative construction material, testing two mix designs with lime-metakaolin binder and partial potassium sulphate substitution. A 3% sulphate replacement improved compressive strength, reduced drying shrinkage and initial water absorption while preserving lightweight properties. Cradle-to-gate assessment confirmed negative net GHG emissions (-0.47 to -0.49 kg CO2e per specimen).
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
日本では建設業の脱炭素（ embodied carbon / 炭素貯留建材）がScope 3やLCA開示と連動しつつ注目される。炭素ネガティブ建材の定量評価手法は、国内のカーボンニュートラル建築・環境性能表示の議論に参考となる。
In the global GX context
Embodied carbon in construction is increasingly central to global disclosure frameworks (ISSB, CSRD, TCFD). This paper offers empirical evidence on carbon-negative materials and cradle-to-gate accounting, relevant to construction-sector decarbonization and green building certification debates.
👥 読者別の含意
🔬研究者:炭素貯留建材の耐久性・炭素収支評価手法に関心のある材料・LCA研究者に有用。
🏢実務担当者:建設・建材企業が炭素ネガティブ材料の性能データとLCA算定例として参照可能。
🏛政策担当者:建築物のembodied carbon規制やグリーン建材認定制度の設計に示唆を与える。
📄 Abstract（原文）
In view of the construction industry's significant contribution to global greenhouse gas emissions, the growing imperative for the development of sustainable construction materials has been recognised. Within this context, hempcrete has garnered significant interest due to its carbon-negative attributes, emerging as a promising alternative for mitigating the environmental consequences of the construction industry. However, hempcrete has yet to achieve widespread adoption in building applications, partly due to its relatively low compressive strength and the insufficient characterisation of durability performance. This study assesses the influence of potassium sulphate on the density, compressive strength, durability and carbon sequestration performance of hempcrete specimens. Two hempcrete mix designs were investigated in this study. The first employed a lime and metakaolin binder, whilst the second incorporated a partial replacement of the binder with potassium sulphate. The experimental framework encompassed the microstructural characterisation of the constituent materials, as well as the evaluation of mechanical properties through density and compressive strength tests. Durability tests included capillary water absorption and drying shrinkage tests, and the environmental performance was addressed through quantifying the carbon sequestration capacity of hempcrete specimens. The results demonstrated that a 3% replacement of the binder with potassium sulphate notably enhanced the compressive strength of hempcrete specimens, whilst preserving the lightweight nature of the material. The inclusion of potassium sulphate mitigated drying shrinkage of hempcrete specimens and significantly reduced the initial rate of water absorption. Additionally, the 24-hour water absorption coefficient remained unaffected, while a measurable increase was observed in the 144-hour water absorption coefficient. Lastly, an evaluation of the developed hempcrete within a cradle-to-gate system boundary revealed negative net GHG emissions (-0.47 and -0.49 kg CO 2 e/specimen).
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.cscm.2026.e06597first seen 2026-10-05 05:25:42
🔔 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。