Equivalent method for obtaining concrete age on the basis of electrical resistivity

Abstract Concrete age is the time since the moment water is added to the cement, and the age of concrete comprehensively reflects the physical properties of the concrete when curing under standard conditions. For concrete under nonstandard conditions, its physical properties are directly related to...

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Autores principales:	Xiaochun Lu, Fuguo Tong, Xinyuan Zha, Gang Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4c03ae513a094677bf3ad77e4450da7a
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spelling	oai:doaj.org-article:4c03ae513a094677bf3ad77e4450da7a2021-11-08T10:52:52ZEquivalent method for obtaining concrete age on the basis of electrical resistivity10.1038/s41598-021-00447-82045-2322https://doaj.org/article/4c03ae513a094677bf3ad77e4450da7a2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00447-8https://doaj.org/toc/2045-2322Abstract Concrete age is the time since the moment water is added to the cement, and the age of concrete comprehensively reflects the physical properties of the concrete when curing under standard conditions. For concrete under nonstandard conditions, its physical properties are directly related to both its age and temperature history. The equivalent age of concrete is the time at which concrete under nonstandard conditions reaches the same state as concrete under standard conditions. Most equivalent methods, such as the Nurse-Saul function and the Arrhenius function, are based on a maturity index. However, the accuracy of these methods breaks down when the curing temperature range is wide. In this paper, the electrical resistivity of concrete is used as the index to determine the equivalent age of concrete. This method is based on the assumption that concrete with the same mixture proportions has the same electrical resistivity when the maturity of the concrete is the same, regardless of the curing history. The proposed method is advantageous because it can be performed in real time and is nondestructive. To constantly measure the electrical resistivity of concrete, an automatic data acquisition system is developed to monitor the electrical resistivity of concrete and reduce the error caused by polarization as much as possible. Then, a model for predicting the electrical resistivity of concrete under different curing temperatures is proposed to conveniently calculate the equivalent coefficient. Finally, the results calculated by the proposed equivalent method are compared with those of the standard method (Nurse-Saul equation), and the results of the proposed model are found to be more reasonable.Xiaochun LuFuguo TongXinyuan ZhaGang LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xiaochun Lu Fuguo Tong Xinyuan Zha Gang Liu Equivalent method for obtaining concrete age on the basis of electrical resistivity
description	Abstract Concrete age is the time since the moment water is added to the cement, and the age of concrete comprehensively reflects the physical properties of the concrete when curing under standard conditions. For concrete under nonstandard conditions, its physical properties are directly related to both its age and temperature history. The equivalent age of concrete is the time at which concrete under nonstandard conditions reaches the same state as concrete under standard conditions. Most equivalent methods, such as the Nurse-Saul function and the Arrhenius function, are based on a maturity index. However, the accuracy of these methods breaks down when the curing temperature range is wide. In this paper, the electrical resistivity of concrete is used as the index to determine the equivalent age of concrete. This method is based on the assumption that concrete with the same mixture proportions has the same electrical resistivity when the maturity of the concrete is the same, regardless of the curing history. The proposed method is advantageous because it can be performed in real time and is nondestructive. To constantly measure the electrical resistivity of concrete, an automatic data acquisition system is developed to monitor the electrical resistivity of concrete and reduce the error caused by polarization as much as possible. Then, a model for predicting the electrical resistivity of concrete under different curing temperatures is proposed to conveniently calculate the equivalent coefficient. Finally, the results calculated by the proposed equivalent method are compared with those of the standard method (Nurse-Saul equation), and the results of the proposed model are found to be more reasonable.
format	article
author	Xiaochun Lu Fuguo Tong Xinyuan Zha Gang Liu
author_facet	Xiaochun Lu Fuguo Tong Xinyuan Zha Gang Liu
author_sort	Xiaochun Lu
title	Equivalent method for obtaining concrete age on the basis of electrical resistivity
title_short	Equivalent method for obtaining concrete age on the basis of electrical resistivity
title_full	Equivalent method for obtaining concrete age on the basis of electrical resistivity
title_fullStr	Equivalent method for obtaining concrete age on the basis of electrical resistivity
title_full_unstemmed	Equivalent method for obtaining concrete age on the basis of electrical resistivity
title_sort	equivalent method for obtaining concrete age on the basis of electrical resistivity
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/4c03ae513a094677bf3ad77e4450da7a
work_keys_str_mv	AT xiaochunlu equivalentmethodforobtainingconcreteageonthebasisofelectricalresistivity AT fuguotong equivalentmethodforobtainingconcreteageonthebasisofelectricalresistivity AT xinyuanzha equivalentmethodforobtainingconcreteageonthebasisofelectricalresistivity AT gangliu equivalentmethodforobtainingconcreteageonthebasisofelectricalresistivity
_version_	1718442520850989056

Equivalent method for obtaining concrete age on the basis of electrical resistivity

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