Towards low-carbon deep soil mixing: Alkali activation of fly ash and slags
低炭素深層混合処理に向けて：フライアッシュとスラグのアルカリ活性化 (AI 翻訳)
Deepesh Bansal, Shuxiang Zhang, Ziyu Lu, Deepak Patwa, Kai Yao
🤖 gxceed AI 要約
日本語
深層混合処理（DSM）はセメントや石灰を多用するが、その炭素フットプリント削減のため、産業副産物（フライアッシュ、高炉スラグ、カルシウムカーバイドスラグ）を用いたアルカリ活性バインダーを評価。最適配合（FA:GBFS:CCS=2:5:3）でセメント固化土より20-30%高い強度を達成し、低炭素な地盤改良の可能性を示した。
English
Deep Soil Mixing (DSM) traditionally relies on cement or lime, but this study evaluates alkali-activated binders from industrial byproducts (fly ash, slag, calcium carbide slag) to reduce carbon footprint. An optimal mix (FA:GBFS:CCS=2:5:3) achieved 20-30% higher strength than cement-stabilized soil, demonstrating potential for low-carbon ground improvement.
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、カーボンニュートラル達成に向けて建設資材の低炭素化が急務。本研究成果は、産業副産物を活用した低炭素バインダーの実用化に寄与し、建設分野のGX推進に貢献する。
In the global GX context
Globally, the construction sector faces pressure to reduce embodied carbon. This study offers a viable alternative to cement in ground improvement, aligning with global efforts to decarbonize construction materials and promote circular economy.
👥 読者別の含意
🔬研究者:Provides experimental data on alkali-activated binders for soil stabilization, useful for further optimization and durability studies.
🏢実務担当者:Offers a potential low-carbon binder formulation for DSM projects, but requires pilot testing and cost-benefit analysis.
🏛政策担当者:Highlights the potential of industrial byproducts in reducing construction emissions, supporting policies for circular economy and low-carbon construction.
📄 Abstract（原文）
Deep Soil Mixing (DSM) is widely used to improve soft and problematic soils, traditionally relying on cement or lime as binders. However, their high carbon footprint and durability limitations under aggressive environments highlight the need for sustainable alternatives. This study evaluates alkali-activated binders produced from industrial byproducts: fly ash (FA), granulated blast furnace slag (GBFS), and calcium carbide slag (CCS), for stabilizing silty clay. Sodium hydroxide (NH) and sodium silicate (SS) were used as the primary activators, while red mud was incorporated as a minor supplementary alkaline additive. Binder slurries were prepared with a fixed Na2O content of 8% and an NH/SS ratio of 1.5, while the water-to-binder ratio was varied from 0.6 to 1.2. Slurry workability was characterized using a Marsh funnel test, and the mechanical performance of stabilized soils was evaluated through unconfined compressive strength tests after 7 and 28 days of curing. Results show that FA-rich mixtures exhibit limited early strength, whereas higher GBFS and CCS contents promote C-A-S-H gel formation, matrix densification, and significantly enhanced strength. An optimal FA:GBFS:CCS ratio of 2:5:3 achieved favorable slurry properties and delivered 20–30% higher strength than cement-stabilized soil, demonstrating the potential of this low-carbon binder for sustainable DSM practice.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1051/e3sconf/202673004006/pdffirst seen 2026-08-07 05:00:43
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