Comprehensive dielectric model of cement concrete including frequency and temperature

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2022-09-23 DOI:10.1680/jadcr.21.00196

Meili Meng, Zhanglan Chen, F. Wang

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引用次数: 1

Abstract

The dielectric properties of cement concrete are not only related to the dielectric properties and volume ratio of each component, but also related to frequency and temperature. In order to analyze these influencing factors, a dielectric constant test was done in the laboratory. Experimental results show that the dielectric constants decrease linearly with temperature increasing and decreases exponentially with the increase of frequency. Based on the experimental rules, a new dielectric model including frequency and temperature is established and verified by experiments. The verification results show that the calculation accuracy of the comprehensive dielectric model after considering the influence of frequency and temperature is improved by 25.5%, which meets the requirements of engineering detection accuracy. The model is applied to engineering practice, and the calculation methods of pavement structural layer thickness and moisture content are developed. The results show that the comprehensive dielectric model established in this paper has smaller error and higher accuracy. Using this dielectric model, the data conversion between different frequency and temperature can be achieved. The research results of this paper can provide reference and basis for the quality evaluation of concrete structures.

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包括频率和温度的水泥混凝土综合介电模型

水泥混凝土的介电性能不仅与各成分的介电特性和体积比有关，还与频率和温度有关。为了分析这些影响因素，在实验室中进行了介电常数测试。实验结果表明，介电常数随温度的升高呈线性下降，随频率的升高呈指数下降。根据实验规律，建立了一个新的包含频率和温度的介质模型，并通过实验进行了验证。验证结果表明，综合介质模型在考虑频率和温度影响后，计算精度提高了25.5%，满足工程检测精度要求。将该模型应用于工程实践，提出了路面结构层厚度和含水量的计算方法。结果表明，本文建立的综合介质模型误差较小，精度较高。使用该介质模型，可以实现不同频率和温度之间的数据转换。本文的研究成果可为混凝土结构的质量评价提供参考和依据。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.