基于净浆流变理论的煅烧煤矸石粉自密实混凝土配合比设计模型研究

doi:10.16552/j.cnki.issn1001-1625.2025.0768

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (11): 4162-4175.DOI: 10.16552/j.cnki.issn1001-1625.2025.0768

基于净浆流变理论的煅烧煤矸石粉自密实混凝土配合比设计模型研究

王黎明¹, 程书凯^1,2, 刘其文³

1.武汉工程大学土木工程与建筑学院,武汉 430073;
2.绿色土木工程材料与结构湖北省工程研究中心,武汉 430073;
3.贵州省水利水电勘测设计研究院股份有限公司,贵阳 550000

收稿日期:2025-07-31 修订日期:2025-10-16 出版日期:2025-11-15 发布日期:2025-12-04
通信作者: 刘其文,高级工程师。E-mail:172294127@qq.com
作者简介:王黎明(1995—),男,硕士研究生。主要从事高性能混凝土方面的研究。E-mail:2064339857@qq.com
基金资助:
国家自然科学基金(52208286);贵州省科技计划(2023-207)

Mix Proportion Design Model of Self-Compacting Concrete Incorporating Calcined Coal Gangue Powder Based on Paste Rheology Theory

WANG Liming¹, CHENG Shukai^1,2, LIU Qiwen³

1. School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China;
2. Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan 430073, China;
3. Guizhou Water & Power Survey-Design Institute Co., Ltd., Guiyang 550000, China

Received:2025-07-31 Revised:2025-10-16 Published:2025-11-15 Online:2025-12-04

摘要/Abstract

摘要： 面对煤矸石堆积带来的环境压力以提升其在工程应用潜力。以净浆流变阈值理论为基础,通过粉煤灰和煅烧煤矸石粉确定自密实混凝土净浆流变性,进行煅烧煤矸石粉-水泥-粉煤灰三元胶凝体系的自密实混凝土配合比试验。利用朗肯主动土压力原理对净浆屈服应力模型进行优化,通过双线性插值方法对模型进行定量评估,并对优化模型的准确性进行验证。结果表明:当m(水泥)∶m(粉煤灰)∶m(煅烧煤矸石粉)为67.5∶22.5∶10.0、饱和减水剂掺量为1.3%(质量分数)时,自密实混凝土净浆流动性最优。当胶砂质量比为0.6~0.8、最优砂率为50%(质量分数)时,自密实混凝土流动性最优。利用朗肯主动土压力原理修正后净浆屈服应力力学模型较原模型绝对精度提高了14.97个百分点,提高了煅烧煤矸石粉-水泥-粉煤灰三元胶凝体系的自密实混凝土工作性能预测精度。

关键词: 净浆流变阈值理论, 煅烧煤矸石粉, 朗肯主动土压力, 自密实混凝土, 配合比

Abstract: Facing the environmental pressure caused by the accumulation of coal gangue to enhance its potential in engineering application. Based on the paste rheological threshold theory, the rheological properties of self-compacting concrete paste were determined by fly ash and calcined coal gangue powder, and the mix proportion test of self-compacting concrete with calcined coal gangue powder-cement-fly ash ternary cementitious system was carried out. The yield stress model of paste was optimized by Rankine active earth pressure principle. The model was quantitatively evaluated by bilinear interpolation method, and the accuracy of the optimized model was verified. The results show that when m(cement)∶m(fly ash)∶m(calcined coal gangue powder) is 67.5∶22.5∶10.0, and the content of saturated water-reducing agent is 1.3% (mass fraction), the fluidity of self-compacting concrete paste is the best. When the cement-to-sand mass ratio is 0.6~0.8 and the optimal sand ratio is 50% (mass fraction), the fluidity of self-compacting concrete is the best. The absolute accuracy of the yield stress mechanical model of paste modified by Rankine active earth pressure principle is 14.97 percentage points higher than that of the original model, and the prediction accuracy of the working performance of self-compacting concrete of calcined coal gangue powder-cement-fly ash ternary cementitious system is improved.

Key words: paste rheological threshold theory, calcined coal gangue powder, Rankine active earth pressure, self-compacting concrete, mix proportion

中图分类号:

TU528.31

王黎明, 程书凯, 刘其文. 基于净浆流变理论的煅烧煤矸石粉自密实混凝土配合比设计模型研究[J]. 硅酸盐通报, 2025, 44(11): 4162-4175.

WANG Liming, CHENG Shukai, LIU Qiwen. Mix Proportion Design Model of Self-Compacting Concrete Incorporating Calcined Coal Gangue Powder Based on Paste Rheology Theory[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(11): 4162-4175.

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基于净浆流变理论的煅烧煤矸石粉自密实混凝土配合比设计模型研究

Mix Proportion Design Model of Self-Compacting Concrete Incorporating Calcined Coal Gangue Powder Based on Paste Rheology Theory

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