当前位置: X-MOL 学术Energy Build. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Enhancing thermal properties of mortars through partial sand replacement with diatomite and phase change materials
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-15 , DOI: 10.1016/j.enbuild.2025.115322
Houssem Hachemi, Chakib Seladji, M. Reda Haddouche, Müslüm Arıcı, Smain Melouka, Omar Taleb, Brahim Farid Houti, Djahida Mahmoudi, Mohammed Abdelbassit Kherrafi, Sabrina Taieb Bouderbal

The growing demand for sustainable building materials highlights the importance of enhancing the hygrothermal performance of mortars, a key component in construction. This study investigated the use of diatomite (in powder and gravel forms) and phase change materials (PCM) as sand substitutes to improve mortar properties. These innovations target construction professionals seeking to reduce energy consumption and improve building efficiency. The research consisted of two phases. The first involved experimental optimization of standard mortar by replacing traditional sand with varying proportions of diatomite powder and gravel. Mortar samples were tested under controlled temperature and humidity using the ZL-7918A apparatus, with temperature fluctuations recorded every 10 min over 7 h (420 min). The results showed significant improvements in thermal performance, with diatomite gravel outperforming powder. Notably, mortar with 80 % diatomite gravel (MDG8) reduced heat flow by 31 % compared to ordinary mortar (OM). The second phase employed numerical modeling using the finite element method (FEM) to validate experimental findings. The model demonstrated strong agreement with experimental results, with a relative error of less than ± 5 %. Additionally, the study analyzed three hollow brick walls with different finishes: OM, MDG8, and MDG8 with PCM (MDG8PCM). The numerical results revealed that the wall with the MDG8PCM finishing layer contributed to a 10 % reduction in thermal flux compared to a wall with the MDG8 finishing layer. This novel approach, combining experimental and numerical methods, provides valuable insights for sustainable construction practices, offering effective solutions to improve thermal regulation in buildings.

中文翻译:


通过用硅藻土和相变材料替代部分砂子来提高砂浆的热性能



对可持续建筑材料的需求不断增长,凸显了提高砂浆湿热性能的重要性,砂浆是建筑的关键组成部分。本研究调查了硅藻土(粉末和砾石形式)和相变材料 (PCM) 作为沙子替代品以改善砂浆性能的使用。这些创新针对寻求降低能耗和提高建筑效率的建筑专业人士。研究包括两个阶段。第一个涉及通过用不同比例的硅藻土粉末和砾石代替传统沙子来对标准砂浆进行实验优化。使用 ZL-7918A 仪器在受控温度和湿度下测试砂浆样品,在 7 小时 (420 分钟) 内每 10 分钟记录一次温度波动。结果表明,热性能有了显著改善,硅藻土砾石的性能优于粉末。值得注意的是,与普通砂浆 (OM) 相比,含有 80% 硅藻土砾石 (MDG8) 的砂浆减少了 31% 的热流。第二阶段采用有限元法 (FEM) 的数值建模来验证实验结果。该模型与实验结果非常吻合,相对误差小于 ± 5%。此外,该研究还分析了三种不同饰面的空心砖墙:OM、MDG8 和 MDG8 与 PCM (MDG8PCM)。数值结果表明,与带有 MDG8 饰面层的墙壁相比,带有 MDG8PCM 饰面层的墙壁有助于减少 10% 的热通量。这种新颖的方法结合了实验和数值方法,为可持续建筑实践提供了有价值的见解,为改善建筑物的热调节提供了有效的解决方案。
更新日期:2025-01-15
down
wechat
bug