Impact of Temperature on the Moisture Buffering Performance of Palm and Sunflower Concretes

Fathia Dahir Igue (1) , Anh Dung Tran Le (1) , Alexandra Bourdot (2) , Geoffrey Promis (1) , Sy Tuan Nguyen (3, 4) , Omar Douzane (1) , Laurent Lahoche (1) , Thierry Langlet (1)

1 LTI - Laboratoire des technologies innovantes - UR UPJV 3899
2 LMT - Laboratoire de mécanique et technologie
3 Institute of Research and DevelopmentDuy Tan UniversityDa NangVietnam
4 DTU - Duy Tan University

The use of bio-based materials (BBM) in buildings is an interesting solution as they are eco-friendly materials and have low embodied energy. This article aims to investigate the hygric performance of two bio-based materials: palm and sunflower concretes. The moisture buffering value (MBV) characterizes the ability of a material or multilayer component to moderate the variation in the indoor relative humidity (RH). In the literature, the moisture buffer values of bio-based concretes were measured at a constant temperature of 23 °C. However, in reality, the indoor temperature of the buildings is variable. The originality of this article is found in studying the influence of the temperature on the moisture buffer performance of BBM. A study at wall scale on its impact on the indoor RH at room level will be carried out. First, the physical models are presented. Second, the numerical models are implemented in the Simulation Problem Analysis and Research Kernel (SPARK) suited to complex problems. Then, the numerical model validated with the experimental results found in the literature is used to investigate the moisture buffering capacity of BBM as a function of the temperature and its application in buildings. The results show that the temperature has a significant impact on the moisture buffering capacity of bio-based building materials and its capacity to dampen indoor RH variation. Using the numerical model presented in this paper can predict and optimize the hygric performance of BBM designed for building application.

Domaines: Génie civil

Fathia Dahir Igue, Anh Dung Tran Le, Alexandra Bourdot, Geoffrey Promis, Sy Tuan Nguyen, et al.. Impact of Temperature on the Moisture Buffering Performance of Palm and Sunflower Concretes. Applied Sciences, 2021, 11 (12), pp.5420. ⟨10.3390/app11125420⟩. ⟨hal-03449906⟩