通过CO2固化增强面向水泥结合板的性能
Matheus R Cabral1,2, Erika Y Nakanishi3,4, Sérgio F Santos5
1Research Nucleus On Materials for Biosystems (BioSMat), Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo, Av. Duque de Caxias Norte, 225, Pirassununga, SP, 13635-900, Brazil. matheus-roberto.cabral.1@ulaval.ca.
Environmental science and pollution research international
|October 21, 2023
概括
二氧化碳 (CO2) 固化可通过增加碳酸含量和改善物理和机械性能,显著增强面向水泥结合板. 更长时间的二氧化碳暴露,特别是12小时,产生了更高的板性能.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 可持续的建筑材料 可持续的建筑材料
背景情况:
- 面向型水泥粘合板 (OCBB) 是使用水泥作为粘合剂的工程木制品.
- 传统的固化方法可能无法完全优化基于水泥的复合材料的性能.
- 探索其他固化技术,如二氧化碳 (CO2) 暴露,对于材料增强至关重要.
研究的目的:
- 研究二氧化碳固化对Eucalyptus spp.物理和机械性能的影响. 基于链的OCBBs.基于链的OCBBs.
- 为了确定不同CO2固化时间 (6h和12h) 对船上性能的影响.
- 分析二氧化碳固化引起的微观结构变化.
主要方法:
- 使用Eucalyptus spp.制造的OCBB的制造 和早期高强度波特兰水泥,目标密度为1250kg/m3.
- 应用三个固化条件:控制 (没有CO2),6小时的CO2固化和12小时的CO2固化,然后在和环境中固化到28日.
- 评估物理和机械性能,包括碳酸含量,并使用扫描电子显微镜 (SEM) 进行微结构分析.
主要成果:
- 二氧化碳固化增加了OCBB中的碳酸 (CaCO3) 含量,在固化12小时后效果更为明显.
- 与控制板相比,二氧化碳固化板的物理和机械性能明显改善.
- 破裂模块 (MOR) 与对照增加了80% (6h CO2) 和84% (12h CO2);SEM显示出更密集的矩阵和改进的线程矩阵结合.
结论:
- 二氧化碳固化是一种有效的方法,可以增强面向水泥结合板的性能.
- 较长的二氧化碳固化时间 (12小时) 会使板材性能得到更好的改善.
- 增强的性能归因于增加的CaCO3含量和更密集的微观结构,具有更好的界面粘合.
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