考虑聚羧酸减水剂和粉煤灰影响的水泥砂浆流动性能预测

doi:10.3969/j.issn.1674-0696.2025.11.11

重庆交通大学学报（自然科学版） ›› 2025, Vol. 44 ›› Issue (11): 85-92.DOI: 10.3969/j.issn.1674-0696.2025.11.11

• 智慧交通基础设施 • 上一篇

考虑聚羧酸减水剂和粉煤灰影响的水泥砂浆流动性能预测

郑丹1，沈秋隆1，付光川2，李鑫鑫1

(1. 重庆交通大学河海学院，重庆 400074； 2. 重庆市水利港航建设集团有限公司，重庆 400020)

收稿日期:2024-03-02 修回日期:2025-08-19 发布日期:2025-11-27
作者简介:郑丹（1979—），男，重庆人，教授，博士，主要从事混凝土结构动力分析方面的研究。E-mail:zhengdan@cqjtu.edu.cn 通信作者：李鑫鑫（1985—），男，湖北宜昌人，教授，博士，主要从事水工结构检测与加固等方面的研究。E-mail:xinxinli@cqjtu.edu.cn
基金资助:
重庆水利科技重点项目(CQSLK—2024008)；重庆交通大学研究生科研创新项目(2025S0033)

Flowability Prediction of Cement Mortar Considering the Effect of Polycarboxylic Acid Water Reducing Agent and Fly Ash

ZHENG Dan1, SHEN Qiulong1, FU Guangchuan2, LI Xinxin1

(1. School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. Chongqing Water Conservancy Harbor and Channel Construction Group Co., Ltd., Chongqing 400020, China)

Received:2024-03-02 Revised:2025-08-19 Published:2025-11-27

摘要/Abstract

摘要： 针对水泥砂浆流变性能预测问题，通过开展砂浆堆积密实度（湿测法）试验和砂浆扩展度试验，研究了在不同减水剂掺量条件下，粉砂比分别为0.75和0.85，以及粉砂比为0.75且掺入30%粉煤灰时砂浆的工作性能，基于水膜厚度理论提出了考虑减水剂影响的砂浆水膜厚度修正模型，实现了对水膜厚度和相对扩展度间的量化分析。研究表明：减水剂在提升砂浆堆积密实度的同时存在饱和特性，而粉煤灰的物理填充作用能协同增大水膜厚度；考虑减水剂影响的修正水膜厚度与相对扩展度呈线性正相关，成果可为砂浆流动性能预测提供一定的参考。

关键词: 水利工程；修正水膜厚度模型；减水剂；湿测法；砂浆流动性

Abstract: To address the prediction of cement mortar rheological properties, the working performance of mortar under different dosages of water-reducer, with sand-to-cement ratios of 0.75 and 0.85, as well as a sand-to-cement ratio of 0.75 with 30% fly ash admixture was studied by conducting mortar pile density (wet measurement method) tests and mortar expansion tests. Based on the water film thickness theory, a modified water film thickness model considering the influence of water-reducer was proposed, enabling quantitative analysis between water film thickness and relative expansion space. The research reveals that while water-reducers enhance mortar bulk density, they exhibit saturation characteristics. Meanwhile, the physical filling effect of fly ash synergistically increases water film thickness. The modified water film thickness, considering the influence of water reducers, exhibits a linear positive correlation with relative expansion degree. The results can provide a certain reference basis for predicting the flowability of mortar.

Key words: hydraulic engineering; modified water film thickness model; water reducer; wet measurement method; mortar fluidity

中图分类号:

U414

郑丹1，沈秋隆1，付光川2，李鑫鑫1. 考虑聚羧酸减水剂和粉煤灰影响的水泥砂浆流动性能预测[J]. 重庆交通大学学报（自然科学版）, 2025, 44(11): 85-92.

ZHENG Dan1, SHEN Qiulong1, FU Guangchuan2, LI Xinxin1. Flowability Prediction of Cement Mortar Considering the Effect of Polycarboxylic Acid Water Reducing Agent and Fly Ash[J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(11): 85-92.

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考虑聚羧酸减水剂和粉煤灰影响的水泥砂浆流动性能预测

Flowability Prediction of Cement Mortar Considering the Effect of Polycarboxylic Acid Water Reducing Agent and Fly Ash

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