Journal ArticleDOI
Influence of temperature and humidity on Portland cement mortar resistivity monitored with inner sensors
TLDR
In this article, a theoretical discussion about how these two factors affect resistivities of concrete and mortar is provided and experimental results on sensorized mortar probes are presented and correlated to analytical models of temperature and humidity influences.Abstract:
Concrete resistivity is directly related to relative humidity (RH) and is also affected by temperature. In this paper, a theoretical discussion about how these two factors affect resistivities of concrete and mortar is provided. Moreover, experimental results on sensorized mortar probes are presented and correlated to analytical models of temperature and humidity influences. All measurements were performed under controlled conditions. Temperature, RH, and resistivity were measured simultaneously in a particular zone of the probes. Temperature scanning was performed over short periods of time (approximately 1 h) and the probes were covered with waterproof paraffin each time for constant humidity content. This was feasible as all sensors were embedded. Water contents were ensured during the experiment by weighting the probes. Conclusions on the applicability of these techniques, their advantages, and limitations, and correlation to Archie and Arrhenius laws of the results are made.read more
Citations
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Journal ArticleDOI
Electrical Resistivity of Concrete for Durability Evaluation: A Review
Pejman Azarsa,Rishi Gupta +1 more
TL;DR: In this paper, an extensive literature review has been done to address relationship between concrete electrical resistivity and its certain durability characteristics These durability characteristics include chloride diffusivity and corrosion of reinforcement as these have major influence on concrete degradation process Overall, there exists an inverse or direct proportional correlation between these parameters Evaluated results, from measuring the concrete electrical resistor, can also be used as a great indicator to identify early age characteristics of fresh concrete and for evaluation of its properties, determination of moisture content, connectivity of the micropores, and even condition assessment of in-service structures
Journal ArticleDOI
Variability Analysis of the Bulk Resistivity Measured Using Concrete Cylinders
TL;DR: In this paper, the variability associated with measuring the bulk resistivity along the longitudinal axis of a cylinder after placing electrodes on either end was described. But, the variability was not shown to correlate with surface resistivity measurements made using a Wenner probe.
Journal ArticleDOI
Electrical response of mortar with different degrees of saturation and deicing salt solutions during freezing and thawing
TL;DR: A series of electrical measurements made on cementitious mortars containing water-NaCl solutions (0 −23.3% concentration by mass) over temperatures in the range of 23°C to −35°C were examined in this paper.
Journal ArticleDOI
The effect of water saturation degree on the electrical properties of cement-based porous material
Qinghua Li,Shilang Xu,Qiang Zeng +2 more
TL;DR: In this paper, the effect of water saturation degree on the electrical properties of CBPMs was investigated and the contribution of the adsorbed phase to the total electrical properties is minor in high water saturation degrees.
Journal ArticleDOI
Normalization of Temperature Effect on Concrete Resistivity by Method Using Arrhenius Law
TL;DR: In this paper, an extensive investigation was carried out to study the effect of temperature on the electrical resistivity of water-saturated and unsaturated concrete specimens Resistivity measurements were performed at temperature cycles ranging from 10 to 45°C (50 to 113°F) The profiles of resistivity versus temperature were found to conform to the Arrhenius law.
References
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Book
Corrosion of Steel in Concrete: Understanding, investigation and repair
TL;DR: In this paper, the authors present a survey and assessment methodology for corrosion assessment of reinforced concrete, including a detailed survey of available techniques for inspection and characterization of steel in concrete.
Journal ArticleDOI
Water Vapour Sorption Experiments on Hardened Cementitious Materials: Part I: Essential Tool for Analysis of Hygral Behaviour and its Relation to Pore Structure
TL;DR: In this article, the effect of various parameters and in particular of the mix-composition is studied on the so-called water vapour sorption isotherms (WVSIs).
Journal ArticleDOI
Relation between resistivity and corrosion rate of reinforcements in carbonated mortar made with several cement types
TL;DR: In this article, the results of corrosion rate and simultaneous electrical resistance values of rebars in mortar fabricated with six different types of cements are given and the relation between those values is presented.
Journal ArticleDOI
The conduction of electricity through concrete
TL;DR: In this paper, the authors examined the relationship between mix proportions, electrical properties of the constituents of concrete and the over-all electrical resistivity for concrete and proposed an electrical model for conduction of electricity through the heterogeneous medium of concrete.
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