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Integrated Life-Cycle Cost, Carbon Footprint, and Probabilistic Risk Assessment of Pozzolanic Cement Incorporating Sugarcane Bagasse Ash for Sustainable Construction in Uganda

ウガンダにおける持続可能な建設のためのサトウキビバガス灰を用いたポゾランセメントの統合的ライフサイクルコスト、カーボンフットプリント、確率的リスク評価 (AI 翻訳)

Nnadi Ejiofor, Josephine Najjobyo, Pathias Ndyabijuka

Crossrefプレプリント2026-01-01#炭素会計対象セクター: construction
DOI: 10.2139/ssrn.6660804
原典: https://doi.org/10.2139/ssrn.6660804

🤖 gxceed AI 要約

日本語

サトウキビバガス灰(SCBA)を用いたポゾランセメントのライフサイクルコスト、カーボンフットプリント、リスク評価を実施。SCBAは57.26%の反応性シリカを含み、耐久性向上、コスト13-18%削減、CO2排出量削減。モンテカルロシミュレーションで99.9%の経済性を示した。低炭素建材として有望。

English

This study evaluates the lifecycle cost, carbon footprint, and risk of pozzolanic cement with sugarcane bagasse ash (SCBA) in Uganda. SCBA contains 57.26% reactive silica, improving durability and reducing water absorption by 15-25%. It reduces building costs by 13-18% and embodied CO2 by 1.41 tons per 1000-block cycle. Monte Carlo simulation shows 99.9% economic feasibility. SCBA cement is a viable low-carbon material.

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進む中、廃棄物由来の低炭素セメントの研究は参考になる。ただし、ウガンダの事例であり、日本の規格やコスト構造にそのまま適用は難しい。日本の建設業界のGHG排出削減に示唆を与える可能性がある。

In the global GX context

This contributes to global knowledge on low-carbon construction materials, demonstrating the use of agricultural waste in cement. While Uganda-specific, it offers a model for other developing regions aiming to reduce building sector emissions. The lifecycle and risk assessment methods are transferable.

👥 読者別の含意

🔬研究者:Provides empirical data on SCBA as a cement replacement, useful for lifecycle assessment and material science researchers.

🏢実務担当者:Construction firms and material suppliers in developing regions can use findings to adopt low-cost, low-carbon cement alternatives.

🏛政策担当者:Offers evidence for policies promoting agricultural waste utilization in building materials to reduce carbon emissions.

📄 Abstract（原文）

This study evaluated Lifecycle costing, carbon footprint, and risk performance of pozzolanic cement embedded sugarcane bagasse ash (SCBA) as an integration towards enhancing sustainable construction in Uganda. A mixed experiment and analysis were adopted, including characterization of physical and chemical components of the burnt sugar ash in a controlled environment, the aggregate grading was optimized, including durability test, cost modeling, and simulation using the Monte Carlo method. The results of oxide composition revealed that silica reactive content SCBA is of 57.26%, against cement mould of 52.88%, indicating that it has higher blending content. SCBA also has a higher Al203 concentration of 6.07%, depicting a stronger and better pozzolanic composition. The particle grading of fine aggregate was 95% to 97%, and coarse aggregate was 71% to 75%, indicating efficient grading and supporting better density and lower permeability. SCBA-modified specimens absorbed 15% to 25% less water, enhancing durability. Additionally, SCBA pozzolanic cement reduced building costs by 13% to 18% and generated UGX 5.11 million in savings compared to regular Portland cement. It also decreased embodied CO2 by approximately 1.41 tons per 1,000-block cycle, resulting in a UGX 267,900 carbon cost reduction. A sensitivity study indicated cost stability with discount rates between 8% and 15%, and Monte Carlo simulations showed a 99.9% probability of economic feasibility. SCBA-based cement is thus a viable low-carbon building material for sustainable infrastructure.

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