负温环境内置电养护混凝土温度场模拟与保温热参数优化

doi:10.16552/j.cnki.issn1001-1625.2025.0523

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (10): 3644-3653.DOI: 10.16552/j.cnki.issn1001-1625.2025.0523

负温环境内置电养护混凝土温度场模拟与保温热参数优化

刘仲洋^1,2,3, 陈宝铭¹, 黄轶淼², 顾宇森¹, 王平¹, 宋金哥¹, 潘雨洁¹

1.河北建筑工程学院土木工程学院,张家口 075051;
2.河北工业大学土木与交通学院,天津 300401;
3.河北省土木工程诊断、改造与抗灾重点实验室,张家口 075051

收稿日期:2025-05-26 修订日期:2025-07-10 出版日期:2025-10-15 发布日期:2025-11-03
通信作者: 黄轶淼,博士,教授。E-mail:yimiao.huang@hebut.edu.cn
作者简介:刘仲洋(1979—),男,博士研究生,副教授。主要从事新材料与结构的研究。E-mail:smartlzy@sina.com

Internal Electrically Cured Concrete Temperature Field Simulation and Thermal Insulation Parameter Optimization in Negative Temperature Environment

LIU Zhongyang^1,2,3, CHEN Baoming¹, HUANG Yimiao², GU Yusen¹, WANG Ping¹, SONG Jinge¹, PAN Yujie¹

1. Department of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075051, China;
2. School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China;
3. Hebei Key Laboratory for Diagnosis, Reconstruction and Anti-Disaster of Civil Engineering, Zhangjiakou 075051, China

Received:2025-05-26 Revised:2025-07-10 Published:2025-10-15 Online:2025-11-03

摘要/Abstract

摘要： 温度是影响负温环境下自限温加热电缆内置电养护(SHC-IEC)混凝土硬化的关键,而保温措施既是温度屏障也是能量管理器。本文利用ANSYS和AutoCAD建立了考虑随机多面体骨料的混凝土三维细观有限元模型,分析了保温措施对负温环境SHC-IEC混凝土温度-时间特性的影响,并进行了试验验证。此外,基于成熟度理论优化了SHC-IEC的保温配置和养护时间设计方案。结果表明,三维细观有限元模型具有良好的精确度,有限元模拟温度结果与试验测试结果仅偏差0.83 ℃。保温层厚度与保温材料的导热系数显著影响负温环境下SHC-IEC混凝土试件的最高温度和温度场的均匀性。当保温层厚度超过50 mm或保温材料导热系数小于0.05 W/(m·℃)时,温度提升的效率逐渐下降。采用成熟度理论,以28 d标准养护的30%和50%抗压强度值为基准,保温材料导热系数为0.032~0.149 W/(m·℃)时,对应最短加热时长为13.089~15.605 h;保温层厚度为13~380 mm时,对应最短加热时长为21.400~25.775 h。

关键词: 混凝土, 负温环境, 自限温加热电缆内置电养护, 三维细观有限元模型, 温度场

Abstract: Temperature is the key to the hardening of concrete with self-limiting heating cable-internal electric curing (SHC-IEC) in negative temperature environments, and the insulation measures are both temperature barriers and energy managers. In this paper, ANSYS and AutoCAD were used to establish a 3D mesoscopic finite element model of concrete considering random polyhedral aggregates. The effects of insulation measures on the temperature-time characteristics of SHC-IEC concrete in negative temperature environment were analyzed, and experimental verification was carried out. In addition, based on the maturity theory, the design scheme of SHC-IEC thermal insulation configuration and curing time was optimized. The results show that the 3D mesoscopic finite element model has good accuracy, and the temperature result of the finite element simulation is only 0.83 ℃ off from the experimental test result. The thickness of the insulation layer and the thermal conductivity of the insulation material significantly affect the maximum temperature and the uniformity of the temperature field of the SHC-IEC concrete specimen under negative temperature environment. When the insulation layer thickness exceeds 50 mm or the thermal conductivity of the insulation material is less than 0.05 W/(m·℃), the efficiency of temperature increase gradually decreases. Using the maturity theory, taking the 30% and 50% compressive strength values of 28 d standard curing as the benchmark, when the thermal conductivity of the insulation material is 0.032~0.149 W/(m·℃) and the insulation layer thickness is 13~380 mm, the shortest heating time is 13.089~15.605 h and 21.400~25.775 h, respectively.

Key words: concrete, negative temperature environment, self-limiting heating cable-internal electric curing, 3D microscale finite element model, temperature field

中图分类号:

TU528

刘仲洋, 陈宝铭, 黄轶淼, 顾宇森, 王平, 宋金哥, 潘雨洁. 负温环境内置电养护混凝土温度场模拟与保温热参数优化[J]. 硅酸盐通报, 2025, 44(10): 3644-3653.

LIU Zhongyang, CHEN Baoming, HUANG Yimiao, GU Yusen, WANG Ping, SONG Jinge, PAN Yujie. Internal Electrically Cured Concrete Temperature Field Simulation and Thermal Insulation Parameter Optimization in Negative Temperature Environment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(10): 3644-3653.

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负温环境内置电养护混凝土温度场模拟与保温热参数优化

Internal Electrically Cured Concrete Temperature Field Simulation and Thermal Insulation Parameter Optimization in Negative Temperature Environment

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