gxceed
← 論文一覧に戻る

Study on the Setting Characteristics, Mechanical Properties, and Volumetric Stability of Alkali-Activated Metakaolin-Based Composite Materials

アルカリ活性化メタカオリン系複合材料の凝結特性、機械的特性、体積安定性に関する研究 (AI 翻訳)

A. Cheng, Pin Chien Cheng, Qi Huang, Yuan Cheng, Kai Lan, H. Hsu

Advances in Science and Technology2026-06-19#その他対象セクター: construction
DOI: 10.4028/p-d6gvax
原典: https://doi.org/10.4028/p-d6gvax

🤖 gxceed AI 要約

日本語

メタカオリンと高炉スラグを用いたセメントフリーのアルカリ活性化ジオポリマーを開発し、凝結時間、圧縮強度、体積安定性を評価。高炉スラグ20%添加で初期凝結時間が2時間に短縮、28日圧縮強度45MPaを達成。C-S-Hゲル形成と重合効率向上により優れた力学特性と安定性を示し、低炭素建設材料として有望。

English

This study develops a cement-free alkali-activated geopolymer using metakaolin and ground granulated blast-furnace slag (GGBFS). Increasing GGBFS content accelerates polymerization, reducing initial setting from 4 to 2 hours and improving early compressive strength up to 45.9 MPa at 7 days. Volumetric stability is excellent with strain <0.12%. The findings support the use of these materials as sustainable alternatives in construction, particularly for subgrade soil stabilization.

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CO₂排出削減が急務であり、本研究成果はセメント代替材料としてのジオポリマーの実用化に寄与する。特に高炉スラグの有効活用は鉄鋼業との連携にもつながり、国内の低炭素社会実現に貢献する。

In the global GX context

Globally, cement production accounts for ~8% of CO₂ emissions. This paper provides empirical data on a promising alternative binder using widely available industrial by-products (GGBFS) and metakaolin, contributing to the decarbonization of the construction sector. The results are relevant for regions with abundant slag and kaolin resources, and for policies promoting low-carbon building materials.

👥 読者別の含意

🔬研究者:Key findings on the synergistic effect of metakaolin and GGBFS on geopolymerization kinetics and mechanical properties, with detailed FTIR and DTG characterization.

🏢実務担当者:Practical data on setting times and compressive strengths for formulating geopolymer mixes suitable for subgrade stabilization or precast applications.

🏛政策担当者:Evidence supporting the adoption of alkali-activated materials in green building standards and low-carbon procurement policies.

📄 Abstract（原文）

Traditional Portland cement production generates substantial CO₂ emissions, hindering sustainable low-carbon building materials. This study develops a cement-free alkali-activated geopolymer using metakaolin as the primary binder, blended with 0%, 10%, and 20% ground granulated blast-furnace slag (GGBFS) by weight, activated by sodium hydroxide and sodium silicate. It examines physical properties, including setting time, compressive strength, and volumetric stability, under varying GGBFS levels, with chemical analysis via FTIR and DTG. Increasing GGBFS accelerates polymerization, reducing initial setting time from 4 hours (0% GGBFS) to 2 hours (20% GGBFS), with final setting time similar. Compressive strengths (MPa) under ambient curing at 1, 7, and 28 days for M100S0, M90S10, and M80S20 are 8.34/13.34/26.28 at 1 day, 31.77/45.90/45.68 at 7 days, and 34.8/45.4/42.1 at 28 days. Early-age strength improves with higher GGBFS due to additional calcium facilitating C-S-H gel formation, while strengths stabilize beyond 28 days. Volumetric stability shows no significant shrinkage or expansion within three days across mixtures, with maximum strain below 0.12%, indicating excellent stability. FTIR shows enhanced Si-O-Al bond intensity (~1050 cm⁻¹) in GGBFS samples, reflecting greater Al incorporation into silicate tetrahedra and denser amorphous structure. The O-H stretching peak (~3400 cm⁻¹) narrows slightly, signifying reduced water and improved polymerization. DTG corroborates enhanced polymerization efficiency with GGBFS. These results highlight superior mechanical properties and stability of GGBFS-blended metakaolin geopolymers, positioning them as promising for subgrade soil stabilization, improving early bearing capacity and long-term durability for sustainable construction.

🔗 Provenance — このレコードを発見したソース

🔔 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。