分析混凝土基板的表面纹理分布特征和涂层粘附强度模型的分析
Tao Fan1, Peng Xu2,3, Huaxin Chen1
1School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.
Materials (Basel, Switzerland)
|December 11, 2025
概括
混凝土表面质地显著影响水性环氧涂层的粘附性. 通过磨砂等处理来优化粗度 (Sa) 和孔面积 (Aa),可以提高粘合强度,这对于涂层性能至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 涂料技术 涂料技术
背景情况:
- 水性环氧涂料对混凝土的粘附对于耐用性至关重要.
- 混凝土基板的表面质地是一个关键的,但复杂的,影响涂层粘附的因素.
- 了解这些关系对于优化涂层应用和性能至关重要.
研究的目的:
- 系统地研究混凝土基板表面质感特征如何影响水borne环氧涂层粘附强度.
- 量化特定纹理参数与在各种固化温度下粘合之间的关系.
- 开发一种基于表面性质的涂层粘附的预测模型.
主要方法:
- 使用激光扫描和参数建模,对混凝土表面纹理 (粗度,孔隙结构,3D形态) 的定量分析.
- 应用了包括刷子清洗和研磨在内的表面处理.
- 使用拉开测试和皮尔森相关性分析来评估粘附强度,并将其与不同温度 (-18°C,20°C,40°C,60°C) 的纹理参数 (Sa,Aa) 相关联.
主要成果:
- 孔面积 (Aa) 的绝对比例 (r ≈ -0.93) 和三维算术平均粗度 (Sa) (r ≈ -0.81) 被确定为影响粘附的主要因素.
- 表面处理 (5小时冲洗,40分钟研磨) 通过增强的机械互锁,提高了40-60%的拉开强度.
- 开发了一个非线性回归模型来预测粘附强度,表明在20°C时的最佳Sa范围为0.35-0.40mm.
结论:
- 表面质地参数,特别是Aa和Sa,是环氧涂层对混凝土粘附的关键决定因素.
- 通过优化机械互锁,表面处理可以显著提高粘合力.
- 固化温度对粘附机制具有关键的影响,低温增加缺陷,高温诱导热应力,需要定制的应用策略.
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