评估含有分子改性聚碳酸超塑性剂的混凝土添加剂的操作性质
Mahdi Moeinian1, Mehdi Ardjmand2, Ferial Nosratinia1
1Department of Chemical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran.
Scientific reports
|August 30, 2024
概括
这项研究开发了一种新的聚碳酸超塑化剂 (PCE-2),可以显著提高混凝土的性能. 与常规PCE-1相比,PCE-2被修改为单聚乙烯糖醇酸盐,提供更好的分散性和更好的混凝土性能.
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.
- 聚合物化学 聚合物化学
背景情况:
- 聚碳酸超塑化剂 (PCE) 对于现代混凝土技术至关重要.
- 提高混凝土的工程特征需要先进的超级可塑剂设计.
- 对PCEs的分子修饰可以提高性能.
研究的目的:
- 设计和制备一个分子修饰的聚碳酸超塑化剂 (PCE-2).
- 为了评估PCE-2在混凝土混合物的性能.
- 将PCE-2与传统的PCE (PCE-1) 进行比较.
主要方法:
- 聚乙烯甘醇与马氏无水化物的化学修饰,以合成单聚乙烯甘醇马氏酸盐 (MPEGM).
- 溶液基聚合制备PCE-1 (TPEG/AA) 和PCE-2 (MPEGM/TPEG/AA) 的方法.
- 使用FTIR,1HNMR,GPC和泽塔电位测量的表征.
- 用不同的超级可塑剂剂量和性能测试制备混凝土混合物.
主要成果:
- PCE-2表现出更强的静电和硬体排斥力,导致更好的水泥颗粒分散.
- 使用PCE-2混凝土的混凝土混合物在减少水分,流动性,设置时间和机械性能方面显著改善.
- 在改善混凝土质量和连续性方面,PCE-2表现优于PCE-1.
结论:
- 像PCE-2这样的分子修饰的聚碳酸超塑剂在混凝土应用中具有显著的优势.
- PCE-2的增强吸附-分散性是其卓越性能的关键.
- 这项研究有助于通过先进的超级增塑剂设计开发高性能混凝土.
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