基甲基纤维素对机器人石膏砂的风湿性质和微观结构演变的温度依赖性影响
Guangjie Ling1, Hongbin Yang2, Sifeng Liu1,3
1School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
Materials (Basel, Switzerland)
|October 29, 2025
概括
基甲基纤维素 (HEMC) 通过减少产量应力和塑料粘度,在高温下稳定机器人石膏砂的形学. 这种添加剂延迟了微观结构的发展,提高了施工中的抽能力和应用性能.
科学领域:
- 建筑材料科学 建筑材料科学
- 类风病学 类风病学 类风病学
- 材料化学 材料化学
背景情况:
- 砂中的早期风学不稳定性,特别是在温度波动下,阻碍了机器人石膏应用.
- 高粘度基甲基纤维素 (HEMC) 是一种潜在的添加剂,可以控制砂的风湿学.
研究的目的:
- 系统地研究HEMC对砂风湿学和早期微观结构进化的温度依赖的影响.
- 确定最佳的HEMC剂量,以在不同温度 (5°C,20°C,40°C) 上保持稳定的风湿性能.
主要方法:
- 在各种HEMC剂量 (00.25重%) 的砂上进行了风湿学测量 (静态产量应力,塑料粘度).
- 超声波脉冲速度 (UPV) 用于监测早期的微观结构发育和水分.
- 补充的微观结构分析包括X射线衍射 (XRD),里埃变换红外光谱 (FTIR) 和扫描电子显微镜与能量分散式X射线光谱 (SEM-EDS).
主要成果:
- HEMC降低了初始静态收益应力和增加了塑料粘度,在更高的温度下效果得到放大 (例如,在40°C时粘度增加133%,HEMC为0.25%).
- HEMC减缓了取决于时间的产量压力的增加,稳定了塑料粘度,减轻了温度引起的不稳定性.
- UPV和微观结构分析证实HEMC延迟水解,CH形成和AFt结晶,与微观结构进化 (r = 0.88) 相关联的质变化.
结论:
- 在一系列的温度范围内,HEMC有效地提高了机器人石膏砂的形稳定性.
- 推的HEMC剂量因温度而异:在5°C时为0.05-0.10%,在20°C时为0.10-0.15%,在40°C时为0.15-0.20%,以达到最佳性能.
- 该研究确立了质性质和微观结构发育之间的强烈相关性,通过UPV测量进行验证.
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