在参考水泥和贝莱特水泥中研究不同侧链结构的聚碳酸超塑剂的分散,吸附和水效应
Yunhui Fang1,2,3, Xiaofang Zhang3, Dongming Yan2
1Polytechnic Institute, Zhejiang University, Hangzhou 310015, China.
Materials (Basel, Switzerland)
|June 10, 2023
概括
聚碳酸乙烯 (PCE) 的分子结构显著影响水泥泥的性能. 优化的PCE (PC-1) 和贝莱特水泥 (LC) 提高了分散性,减少了产量压力,改善了水泥流动性.
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.
- 化学 化学 化学
背景情况:
- 混凝土材料在建筑中至关重要.
- 聚碳酸乙烯 (PCE) 是一种高性能混凝土添加剂.
- 了解PCE-水泥相互作用是优化性能的关键.
研究的目的:
- 研究不同聚碳酸乙烯 (PCE) 分子结构对参考水泥 (RC) 和贝莱特水泥 (LC) 的影响.
- 评估PCE对水泥泥性能的影响,包括分散性,产量应力和水化动力学.
- 为了比较两个不同的PCE分子结构 (PC-1和PC-2) 的性能.
主要方法:
- 通过自由基聚合,合成具有不同分子结构 (PC-1,PC-2) 的PCE.
- 使用粒子电荷检测,凝透色谱和体力测量来对PCE进行表征.
- 用总有机碳分析和扫描电子显微镜评估水泥泥的特性和水化动力学.
主要成果:
- 与PC-2相比,PC-1显示出更高的电荷密度和更好的分子延伸,从而改善了水泥吸附和泥分散性.
- PC-1减少了超过27.8%的泥产量压力,而贝莱特水泥 (LC) 则减少了超过57.5%,提高了流动性.
- PCE结构影响了水化动力学,PC-1和RC显示出更大的延迟,而LC和PC-2则抑制了加速期.
结论:
- PCE的分子结构极大地影响了水泥泥的整形学和分散性.
- 贝莱特水泥 (LC) 在降低产量压力和提高流动性方面具有显著的优势.
- 补水动力学分析提供了对后期补水产品形态学的见解.
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