Abstract

The expected impact of this study is to propose a bio-sourced composite material coupling mechanical and hygrothermal performances. This paper deals with the prediction of hygric properties of compacted raw-earth material reinforced with the flax fibers. New experiments have been performed on fibers and earth composite specimens. Then two modeling approaches have been applied using mixing theory and asymptotic homogenization. It was showed, that besides adding flax fibers improves the mechanical behavior of raw earth as strength and shrinkage reduction, their impact on the hygric property as water vapor permeability was also proved. For longitudinal arrangement of flax fibers with different fibers contents, experimental and modeling results are in good agreement.

摘要

这项研究的预期影响是提出一种结合机械和湿热性能的生物源复合材料。本文涉及亚麻纤维增强压实生土材料的吸湿性能预测。对纤维和土复合材料样本进行了新的实验。然后使用混合理论和渐近均质化应用两种建模方法。结果表明，添加亚麻纤维除了可以改善原土的机械性能（如强度和减少收缩）外，还证明了它们对湿性能（如水蒸气渗透性）的影响。对于不同纤维含量的亚麻纤维的纵向排列，实验和模型结果吻合良好。