Analysis of a chalky earthen masonry unit from the champagne region (France): Is it relevant to stabilize mortar with hydraulic lime?

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-09-15 DOI:10.1016/j.dibe.2025.100756

Guillaume Polidori , Erwan Hamard , Adrien Aras-Gaudry , Céline Rousse , Fabien Beaumont , Sébastien Murer , Mohammed Lachi , Christophe Bliard , Fabien Bogard

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Abstract

This study examines the mechanical and thermal performance of adobe masonry units built with highly chalky soils from the Champagne region (France), focusing on the effect of hydraulic lime content (0, 5, and 14 wt%) in mortar joints. Adobe and mortar samples were fabricated from 19th-century adobe barn soil and tested for their physical and structural properties. Results show that adding hydraulic lime improves wall performance by 37.3 %. However, this gain remains modest in absolute terms, and all mortars exceeded the 0.3 MPa minimum required for structural adobe walls. Lime also slightly reduces thermal conductivity, enhancing insulation. Digital image correlation revealed that lime delays crack formation and modifies failure patterns. Yet, a simplified life cycle analysis showed that 14 wt% lime increases global warming potential (GWP) by 479 %. The results suggest that for low-rise adobe structures, unstabilized mortar may offer a more sustainable alternative.

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来自法国香槟地区的白垩土砌体单元分析：是否与液压石灰稳定砂浆有关？

本研究考察了用法国香槟地区的高白垩土建造的土坯砌体单元的机械和热性能，重点研究了砂浆接缝中水力石灰含量（0、5和14 wt%）的影响。土坯和砂浆样品由19世纪的土坯谷仓土壤制成，并测试了它们的物理和结构特性。结果表明，加入水力石灰可使墙体性能提高37.3%。然而，这种增益在绝对值上仍然是适度的，所有砂浆都超过了结构土坯墙所需的最小0.3 MPa。石灰还能略微降低导热性，增强绝缘性。数字图像相关性显示石灰延迟裂纹形成并改变破坏模式。然而，一个简化的生命周期分析表明，14wt %的石灰增加了479%的全球变暖潜能值（GWP）。结果表明，对于低层土坯结构，不稳定砂浆可能提供一个更可持续的选择。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.