El Hamri Anas, Mouhib Yassine, Ourmiche Atmane, Chigr Mohammed, El Mansouri Nour-Eddine
Laboratory of Molecular Chemistry, Materials and Catalysis (LC2MC), Faculty of Science and Technology of Béni-Mellal, University Sultan Moulay Slimane, B.P. 523, Béni-Mellal 23000, Morocco.
Molecules. 2024 Sep 16;29(18):4399. doi: 10.3390/molecules29184399.
The growing demand for sustainable building materials, amid escalating costs, has spurred interest in alternative solutions such as wood cement composites. This study explores the feasibility of producing wood cement boards (WCBs) using locally sourced cedar sawdust as a reinforcing agent. Boards with a thickness of 10 mm and a target density of 1200 kg/m were manufactured under pressures ranging from 2 to 6 MPa for 24 h. Cedar sawdust, used as raw and untreated material, was incorporated into the mixture as a partial substitute for cement in varying proportions, ranging from 10% to 25% (by weight). The WCBs were cured for 28 days under ambient conditions. Physical properties including density, water absorption (WA), and thickness swelling (TS) were assessed, along with mechanical properties through flexural tests. The results showed that increasing cedar sawdust content decreased both density and mechanical performance while increasing WA and TS. Microstructural analysis (SEM and EDS) revealed significant porosity at higher sawdust contents, while lower contents had better matrix-reinforcement cohesion. Additionally, substantial levels of calcium and silicon were detected on the sawdust surface, indicating stabilized cement hydration products. These findings, supported by thermal (TGA and DSC) and FTIR analyses, clearly demonstrate that cement boards with 10% cedar sawdust exhibit favorable properties for non-structural applications, such as wall and partition cladding.
在成本不断上升的情况下，对可持续建筑材料的需求日益增长，这激发了人们对诸如木水泥复合材料等替代解决方案的兴趣。本研究探讨了使用当地采购的雪松锯末作为增强剂生产木水泥板（WCBs）的可行性。在2至6 MPa的压力下，制造了厚度为10 mm、目标密度为1200 kg/m的板材，持续24小时。作为原材料且未经处理的雪松锯末以不同比例（按重量计为10%至25%）作为水泥的部分替代品掺入混合物中。WCBs在环境条件下养护28天。评估了包括密度、吸水率（WA）和厚度膨胀率（TS）在内的物理性能，以及通过弯曲试验评估的力学性能。结果表明，增加雪松锯末含量会降低密度和力学性能，同时增加WA和TS。微观结构分析（SEM和EDS）显示，锯末含量较高时孔隙率显著增加，而含量较低时基体与增强材料的粘结性更好。此外，在锯末表面检测到大量的钙和硅，表明水泥水化产物已稳定。这些发现得到了热分析（TGA和DSC）和FTIR分析的支持，清楚地表明含有10%雪松锯末的水泥板在非结构应用（如墙面和隔断覆层）中具有良好的性能。
