不同大气温湿条件下混凝土湿度响应试验研究

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发布时间：2020-01-06 00:00:00

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不同大气温湿条件下混凝土湿度响应试验研究

Experimental study on concrete humidity response under different atmospheric temperature and humidity conditions

2023年第8期

混凝土；大气RH；大气温度；含水率；耐久性能

Concrete; Atmospheric RH; Atmospheric temperature; Moisture content; Durability

2023年第8期

10.19761/j.1000-4637.2023.08.031.06

国家自然科学基金项目（52269026）；云南省基础研究计划面上项目（202201AT070104）。

邵忠峰1，张国辉2，*，李常兵2，牛和峰1，高博1

1.中信建设有限责任公司，北京 100027；2.昆明理工大学电力工程学院，云南昆明 650500

邵忠峰1，张国辉2，*，李常兵2，牛和峰1，高博1

邵忠峰,张国辉,李常兵,等.不同大气温湿条件下混凝土湿度响应试验研究[J].混凝土与水泥制品,2023(8):31-36.

SHAO Z F,ZHANG G H,LI C B,et al.Experimental study on concrete humidity response under different atmospheric temperature and humidity conditions[J].China Concrete and Cement Products,2023(8):31-36.

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摘要：混凝土内部湿度迁移与温度传导存在耦合作用，温度、湿度耦合作用下的混凝土内部含水率较单一环境存在显著差异。通过高低温交变湿热试验系统模拟大气环境温度、湿度变化，研究了4种不同大气温度（20、40、50、60 ℃）、4种不同大气RH（30%、60%、90%、98%）条件下混凝土内部含水率的变化规律。结果表明：大气环境温度越高，RH越大，混凝土的含水率越高，且含水率增幅越大；在吸附前5 h内，混凝土的含水率迅速增长，随吸附时间的延长，含水率增长趋势逐渐变缓；当大气温度为40~60 ℃、大气RH为90%~98%时，混凝土的含水率较大；当大气温度为20~30 ℃、大气RH为30%~40%时，混凝土的含水率较小；当大气温度为60 ℃、大气RH为98%时，混凝土的含水率最大，为1.53%；当大气温度为20 ℃、大气RH为30%时，混凝土的含水率最小，为0.09%；由灰色关联度计算结果可知，与大气RH比较，大气温度对混凝土含水率的影响更大。 Abstract: The coupling effect exists between humidity transfer and temperature conduction in concrete, and the internal moisture content of concrete under the coupling effect of temperature and humidity is significantly vary from that in a single environment. The changing atmospheric temperature and humidity were simulated by a fluctuated temperature alternating humidity and heat test system. The evolution law of concrete internal moisture content was researched under four different atmospheric temperatures of 20, 40, 50 and 60 ℃ and four different atmospheric RH of 30%, 60%, 90% and 98%, respectively. The results show that the higher the ambient temperature and RH, the greater the moisture content and the moisture content increasing of concrete. Within 5 h before adsorption, the moisture content increases rapidly, and with the extension of adsorption time, the increasing trend of moisture content gradually slows down. When the atmospheric temperature is 40~60 ℃, and the atmospheric RH is 90%~98%, the concrete moisture content is high. And when the atmospheric temperature is 20~30 ℃, and the atmospheric RH is 30%~40%, the concrete moisture content is low. The maximum moisture content of concrete is 1.53% under the coupling action of diverse atmospheric temperatures and RH, which occurs under the condition of atmospheric temperature of 60 ℃ and RH of 98%. The minimum moisture content of 0.09% occurs when the atmospheric temperature is 20 ℃ and the atmospheric RH is 30%. According to the calculation results of grey correlation degree, the influence of atmospheric temperature on the moisture content of concrete is greater than that of atmospheric RH.

英文名 : Experimental study on concrete humidity response under different atmospheric temperature and humidity conditions

刊期 : 2023年第8期

关键词 : 混凝土；大气RH；大气温度；含水率；耐久性能

Key words : Concrete; Atmospheric RH; Atmospheric temperature; Moisture content; Durability

刊期 : 2023年第8期

DOI : 10.19761/j.1000-4637.2023.08.031.06

文章编号 :

基金项目 : 国家自然科学基金项目（52269026）；云南省基础研究计划面上项目（202201AT070104）。

作者 : 邵忠峰1，张国辉2，*，李常兵2，牛和峰1，高博1

单位 : 1.中信建设有限责任公司，北京 100027；2.昆明理工大学电力工程学院，云南昆明 650500

邵忠峰1，张国辉2，*，李常兵2，牛和峰1，高博1

邵忠峰,张国辉,李常兵,等.不同大气温湿条件下混凝土湿度响应试验研究[J].混凝土与水泥制品,2023(8):31-36.

SHAO Z F,ZHANG G H,LI C B,et al.Experimental study on concrete humidity response under different atmospheric temperature and humidity conditions[J].China Concrete and Cement Products,2023(8):31-36.

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摘要

参数

结论

参考文献

引用本文

Abstract: The coupling effect exists between humidity transfer and temperature conduction in concrete, and the internal moisture content of concrete under the coupling effect of temperature and humidity is significantly vary from that in a single environment. The changing atmospheric temperature and humidity were simulated by a fluctuated temperature alternating humidity and heat test system. The evolution law of concrete internal moisture content was researched under four different atmospheric temperatures of 20, 40, 50 and 60 ℃ and four different atmospheric RH of 30%, 60%, 90% and 98%, respectively. The results show that the higher the ambient temperature and RH, the greater the moisture content and the moisture content increasing of concrete. Within 5 h before adsorption, the moisture content increases rapidly, and with the extension of adsorption time, the increasing trend of moisture content gradually slows down. When the atmospheric temperature is 40~60 ℃, and the atmospheric RH is 90%~98%, the concrete moisture content is high. And when the atmospheric temperature is 20~30 ℃, and the atmospheric RH is 30%~40%, the concrete moisture content is low. The maximum moisture content of concrete is 1.53% under the coupling action of diverse atmospheric temperatures and RH, which occurs under the condition of atmospheric temperature of 60 ℃ and RH of 98%. The minimum moisture content of 0.09% occurs when the atmospheric temperature is 20 ℃ and the atmospheric RH is 30%. According to the calculation results of grey correlation degree, the influence of atmospheric temperature on the moisture content of concrete is greater than that of atmospheric RH.

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