聚碳酸超塑化剂的合成和性能,具有减少粘度和低收缩性能,用于公平面混凝土
Wei Li1,2, Chunxiang Qian1, Chunyang Zheng2
1School of Materials Science and Engineering, Southeast University, Nanjing 211189, China.
Materials (Basel, Switzerland)
|June 19, 2024
概括
一种新型的聚碳酸超塑化剂有效降低了混凝土的收缩和粘度. 最佳的塑料粘度系数 (5-10 Pa·s) 将表面缺陷降至最低,产生高质量的公平面混凝土,空洞较少.
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.
- 聚合物化学 聚合物化学
背景情况:
- 聚碳酸超塑性化剂对于高性能混凝土至关重要.
- 控制公平面混凝土的收缩和表面缺陷仍然是一个挑战.
- 优化添加物特性是改善混凝土质量的关键.
研究的目的:
- 合成一种低收缩,降低粘度的聚碳酸超可塑化剂.
- 评估其在降低表面张力,早期收缩和提高混凝土可加工性方面的性能.
- 确定最佳的塑料粘度系数,以生产高质量的公平面混凝土.
主要方法:
- 聚碳酸盐超级可塑剂的合成使用马莱氨基无水化物,二乙烯糖醇单乙烯,和甲基聚合物 (乙烯糖醇) 甲烯酸盐 (MPEGnMA).
- 使用GPC进行分子结构的表征.
- 测量表面张力,早期收缩,水泥性能和混凝土应用性能.
- 研究塑料粘度系数对光面混凝土中明显空洞的影响.
主要成果:
- 合成的超级可塑剂表现出一种理想的分子结构.
- 表面张力从72.47 mN/m降低到30.56 mN/m.
- 在72小时内,混凝土的收缩率降低了20.6%.
- 最佳的塑料粘度系数范围为5-10Pa·s,在公平面混凝土中产生了出色和良好的表面空白等级.
结论:
- 开发的聚碳酸超塑化剂有效减少收缩并调整混凝土的粘度.
- 它通过最大限度地减少空隙和裂,显著提高了光面混凝土的表面质量.
- 这种添加剂适用于生产高质量的公平面混凝土表面.
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