PAE对掺NEP水下不分散砂浆性能的影响研究
Study on the effect of PAE on the performance of underwater non dispersible mortar with NEP addition
关键词：
聚丙烯酸酯乳液（PAE）；非离子型水性环氧树脂（NEP）；水下不分散砂浆；流动度；凝结时间；水下抗分散性能
Key words：
Polyacrylate emulsion(PAE); Nonionic waterborne epoxy(NEP); Underwater non dispersible mortar; Flowability; Setting time; Underwater anti-dispersion performance
刊期：
2026年第3期
DOI：
10.19761/j.1000-4637.24080450
文章编号：
基金项目：
中央级科研院所基础基金项目（Y424001、Yy424012）；南京市交通科技项目。
作者：
韩雪松1，王 强2，孟星宇1，徐 菲1，*
单位：
1.南京水利科学研究院，江苏 南京 210029；2.南京市公路事业发展中心，江苏 南京 210008
摘要
摘 要：选取了与水泥和非离子型水性环氧树脂（Nonionic waterborne epoxy，NEP）具有良好相容性的聚丙烯酸酯乳液（Polyacrylate emulsion，PAE）对掺NEP的水下不分散砂浆进行了改性，通过测试砂浆的流动度、凝结时间和水下抗分散性能（浊度、质量损失率），研究了PAE掺量（15.0%、17.5%、20.0%、22.5%、25.0%）、胶砂比（1∶1.25、1∶1.50、1∶1.75）对砂浆性能的影响。结果表明：相同胶砂比下，随着PAE掺量的增加，砂浆的流动度增加；相同PAE掺量下，随着胶砂比的增加，砂浆的流动度增加；相同胶砂比下，随着PAE掺量的增加，砂浆的浊度及质量损失率均增加，PAE的掺入对砂浆水下抗分散性能具有削弱作用；相同PAE掺量下，当胶砂比为1∶1.50时，砂浆的水下抗分散性能最佳；相同胶砂比下，随着PAE掺量的增加，砂浆的凝结时间延长；整体上，胶砂比变化对砂浆的凝结时间并无显著影响。研究结果可为水工建筑的高质量修补加固提供参考。
Abstract: Polyacrylate emulsion (PAE), which had good compatibility with cement and nonionic waterborne epoxy (NEP), was selected to modify the underwater non dispersible mortar containing NEP. By testing the flowability, setting time, and underwater anti-dispersion performance (turbidity, mass loss rate) of mortar, the influence of PAE dosage (15.0%, 17.5%, 20.0%, 22.5%, 25.0%) and binder-sand ratio (1∶1.25, 1∶1.50, 1∶1.75) on mortar performance was studied. The results show that under the same binder-sand ratio, the flowability of the mortar increases with the increase of PAE dosage. Under the same PAE dosage, the flowability of the mortar increases with the increase of the binder-sand ratio. Under the same binder-sand ratio, with the increase of PAE content, the turbidity and mass loss rate of the mortar increase. The addition of PAE has a weakening effect on the underwater anti-dispersion performance of the mortar. Under the same PAE dosage, when the binder-sand ratio is 1∶1.50, the underwater anti-dispersion performance of the mortar is optimal. Under the same binder-sand ratio, as the PAE dosage increases, the setting time of the mortar is prolonged. Overall, variations in the binder-sand ratio have no significant effect on the mortar setting time. The research findings can provide a reference for the high-quality repair and reinforcement of hydraulic structures.
结论
（1）随着时间的延长，砂浆的流动度降低；相同胶砂比下，随着PAE掺量的增加，砂浆的流动度增加；相同PAE掺量下，随着胶砂比的增加，砂浆的流动度增加，当胶砂比为1∶1.25时，砂浆的流动度最大。
（2）相同胶砂比下，随着PAE掺量的增加，砂浆的浊度及质量损失率均增加，PAE的掺入对砂浆水下抗分散性能具有削弱作用；相同PAE掺量下，当胶砂比为1∶1.50时，砂浆的浊度及质量损失率相对较低，水下抗分散性能最佳。
（3）相同胶砂比下，随着PAE掺量的增加，砂浆的凝结时间延长；整体上，胶砂比变化对砂浆的凝结时间并无显著影响。
（4）PAE的引入会在一定程度上削弱砂浆的水下抗分散性能，但其对改善砂浆流动性、降低流动性损失以及延长凝结时间均具有一定的积极作用，这种性能的变化反映了材料体系在施工可操作性与水下稳定性之间的权衡关系。对于水下修补砂浆，本文建议PAE掺量应不高于20%，胶砂比宜选用1∶1.50。
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引用本文
韩雪松,王强,孟星宇,等.PAE对掺NEP水下不分散砂浆性能的影响研究[J].混凝土与水泥制品,2026,53(3):38-41,46. HAN X S,WANG Q,MENG X Y,et al.Study on the effect of PAE on the performance of underwater non dispersible mortar with NEP addition[J].China Concrete and Cement Products,2026,53(3):38-41,46 (in Chinese).
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