通过将改性粉与酸盐合并,提高石轻质聚合混凝土的耐用性
Hailong Wang1,2, Libin Shu1, Kuaile Ma3
1College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China.
Materials (Basel, Switzerland)
|February 24, 2024
概括
添加酸改性粉增加了石轻质聚合物混凝土在恶劣环境中的耐用性. 使用2%的酸盐和20微米的颗粒得到了最佳效果,显著减少了结解周期的损伤.
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.
- 混凝土技术 混凝土技术
背景情况:
- 石轻质聚合混凝土 (PLAC) 在河结构中使用,但其耐用性受到水侵蚀和融周期的损害.
- 废轮胎粉具有提高混凝土性能的潜力,但其有效性取决于表面的修改.
- 酸盐处理旨在提高粉在混凝土应用中的兼容性和性能.
研究的目的:
- 研究酸改性废轮胎粉在改善PLAC的冷解耐久性方面的有效性.
- 分析酸盐剂量和颗粒大小对PLAC质量损失率和相对动态弹性模量的影响.
- 用先进的测试方法来描述PLAC中的微观结构变化.
主要方法:
- 结解周期测试以评估耐用性参数 (质量损失,弹性模量).
- 微观分析包括核磁共振 (NMR),超深度3D显微镜和扫描电子显微镜 (SEM).
- 酸盐含量和粉颗粒大小的系统变化.
主要成果:
- 添加改性粉剂显著提高了PLAC在冷解条件下的耐用性.
- 使用2重%的酸盐和20微米的颗粒实现了最佳耐久性,在300个循环后,将质量损失从4.54%降低到0.77%,弹性模量从50.34%增加到64.87%.
- 由于在酸盐处理后更清洁的表面,SEM揭示了改性和水泥矩阵之间的结合有所改善.
- 核磁共振表明,改性减轻了孔隙结构退化,与未经处理的样本相比,处理的样本的孔隙面积增加较小.
结论:
- 酸盐修饰增强了PLAC中的粉的界面粘合,从而产生了优越的解耐受性.
- 该研究展示了一种利用废旧轮胎的可行方法,以提高PLAC在基础设施应用中的耐用性.
- 粉的颗粒大小影响了酸修饰的有效性和随后的孔隙结构演变.
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