在红泥混合水泥材料中的聚碳酸超塑剂的性能和机制
Lei Yang1, Pengfei Wang1, Shuqiong Luo1
1Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China.
Polymers
|July 12, 2025
概括
聚碳酸超塑化剂 (PCE) 提高了红泥水泥糊的加工能力. 减少水分 (WR) -PCE增强了早期的强度,而保持沉降 (SR) -PCE提供了更好的长期流动性,尽管高红色泥含量降低了强度.
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.
- 建筑化学 建筑化学
背景情况:
- 红色泥是生产的副产品,由于其细颗粒和高吸水率,当它被混合到水泥糊中时,会带来可加工性挑战.
- 聚碳酸超塑剂 (PCE) 对于缓解这些问题和保持红泥混合水泥的性能至关重要.
- 澄清不同PCE拓的不同机制,特别是降水 (WR) -PCE和沉保留 (SR) -PCE,对于优化它们的应用至关重要.
研究的目的:
- 为了研究WR-PCE和SR-PCE对红泥混合水泥糊的风质,机械和微结构性质的影响.
- 为了比较不同PCE拓在不同红泥融入水平下的有效性.
- 阐明PCE结构与红泥混合水泥糊的性能增强之间的机制关系.
主要方法:
- 对不同红色泥含量的水泥的整形学 WR-PCE 和 SR-PCE 影响的比较分析.
- 机械性能 (压力强度) 随着时间的推移 (1,3,7,28天) 的评估.
- 用显微镜检查糊状物形态和水化产品的分布.
主要成果:
- 在最佳剂量下,WR-PCE和SR-PCE都显著改善了糊的流动性,降低了粘度和剪切应力.
- 与30分钟和60分钟的WR-PCE相比,SR-PCE在时间上的流动性损失率较低.
- 由于增强的C2S和C3S水合,WR-PCE的结合导致了较早年龄 (0-25%红泥) 的较高压力强度.
- 显微镜检测显示WR-PCE的水化产品分布更为均.
- 50%的红泥含量对糊的强度产生了不利影响,可能是由于高度导致PCE的不稳定.
结论:
- WR-PCE和SR-PCE都有效地提高了红泥混合水泥糊的可加工性.
- WR-PCE在早期力量发展方面优越,而SR-PCE在随着时间的推移保持流动性方面表现出色.
- 红色泥度是一个关键因素;高水平可能会对性能产生负面影响,需要进一步研究稳定策略.
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