Characterizing Curing Cement Slurries by Electrical Conductivity

Backe, K.R.; Lile, Ole Bernt; Lyomov, S.K.

doi:10.2118/74694-pa

Cited by 44 publications

(28 citation statements)

References 27 publications

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“…Our samples are well fitted with the Arps equation, respectively. The same result was also reported by Backe et al [3] by using a single AC frequency measurement instead of using impedance conductivity. Since the Arps correlation corresponds to our results, it is suggested that this equation has sufficient accuracy to be applied on cement at early ages.…”

Section: A Effect Of Curing Temperaturesupporting

confidence: 86%

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Prediction of interface conductivity of cement slurry during early hydration considering the effect of curing temperature and pressure

Ridha

Irawan

Ariwahjoedi

2011

2011 IEEE Symposium on Industrial Electronics and Applications

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Electrical conductivity measurements have been widely used in characterizing the cementitious materials. In mature stages, the influence of interface conductivity to the overall conduction was relatively small. However, its contribution during early hydration is still questionable. This paper calculated the interface conductivity during the first 24 hrs of hydration at elevated temperature and pressure up to 65 o C and 3000 psi. The effect of elevated temperature to conductivity measurement is successfully corrected. Johnson equation is employed to predict the interface conductivity of pore-solid particles. The microstructural parameters that are used in the equation are estimated from the proposed particle expansion model. These calculation outcomes have a good agreement compared to the MIP measurements. The results showed that the interface conductivity grew slightly with the progress of drying. Its contribution to the bulk conductivity is relatively very small of about factor 6 in orders of magnitude. Hence, the influence of interface conductivity to the overall conduction might be disregarded during cement's early hydration.

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Section: A Effect Of Curing Temperaturesupporting

confidence: 86%

“…Backe et al [3] has used the electrical current to characterize cement slurries by using a single AC frequency measurement in obtaining the electrical responses. This measurement also tested to predict the cement slurry setting time during hydration as also presented by Shane [4].…”

Section: Introductionmentioning

confidence: 99%

Prediction of interface conductivity of cement slurry during early hydration considering the effect of curing temperature and pressure

Ridha

Irawan

Ariwahjoedi

2011

2011 IEEE Symposium on Industrial Electronics and Applications

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“…By applying Archie's law, the correlation between the bulk resistivity, pore solution resistivity, and porosity can be expressed by the following [37,97]:…”

Section: Correlation Between Electrical Resistivity and Chloridementioning

confidence: 99%

“…is dependent on tortuosity of concrete and has been found to be 1.5 to 3.2 [37,97]. Combining the above equations gives the formation factor as a function of effective chloride diffusion coefficient of concrete ( eff ) and chloride ion diffusion coefficient in the pore solution ( 0 ):…”

Section: Correlation Between Electrical Resistivity and Chloridementioning

confidence: 99%

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Azarsa

Gupta

2017

Advances in Materials Science and Engineering

225

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Degradation processes in reinforced concrete structures that affect durability are partially controlled by transport of aggressive ions through the concrete microstructure. Ions are charged and the ability of concrete to hold out against transfer of ions greatly relies on its electrical resistivity. Hence, a connection could be expected between electrical resistivity of concrete and the deterioration processes such as increase in permeability and corrosion of embedded steel. Through 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 resistivity, 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. This paper also reviews and assesses research concerning the influential parameters such as environmental conditions and presence of steel rebar and cracks on measuring electrical resistivity of concrete. Moreover, concrete resistivity concept, application, and its various measurement techniques are introduced.

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“…Although UCA can be used throughout the entire setting process over several days or weeks, it has several limitations. Hence, there is a need for a simpler method (Backe et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Iron Nanoparticle Modified Smart Cement for Real Time Monitoring of Ultra Deepwater Oil Well Cementing Applications

et al. 2015

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Better controls during well drilling and cementing operation are critical to ensure safety during construction and the entire service life of the wells. For a successful cementing operation determine the setting of cement in place length of cement supporting the casing and performance of the cement after hardening. At present there are no technologies available to monitor the cementing operations without using buried sensors that could weaken the cement sheath.In this study, smart cement with 0.38 water-to-cement ratio was modified with Iron nanoparticles (NanoFe) to have better sensing properties, so that its behavior can be monitored at various stages of construction and during the service life of wells. A series of experiments evaluated the smart cement behavior with and without NanoFe in order to identify the most reliable sensing properties that can also be relatively easily monitored. Tests were performed on the smart cement from the time of mixing to hardened state behavior. During the initial setting the electrical resistivity changed with time based on the amount of NanoFe used to modify smart oil well cement. A new quantification concept has been developed to characterize cement curing based on electrical resistivity changes in the first 24 hours of curing. When cement was modified with 0.1 percent of conductive filer (CF), the piezoresistive behavior of the hardened smart cement was substantially improved without affecting the rheological and setting properties of the cement. For the smart cement the resistivity change at peak stress was about 2000 times higher than the change in the compressive strain after 28 days of curing.The shear thinning behavior of the smart cement slurries with and without NanoFe at two different temperatures (25°C and 85°C) have been quantified using the new hyperbolic model and compared with another constitutive model with three material parameters, Vocadlo model. The results showed that the hyperbolic model predicated the shear thinning relationship between the shear stress and shear strain rate of the NanoFe modified smart cement slurries very well. Also the hyperbolic model has a maximum shear stress limit were as the other model did not have a limit on the maximum shear stress. Based on the hyperbolic model the maximum shear stresses produced by the 0 percent, 0.5 percent, and 1 percent of NanoFe at temperature of 25°C were 175 Pa, 224 Pa, and 298 Pa, respectively. The maximum shear stresses produced by the 0 percent, 0.5 percent, and 1 percent of NanoFe at temperature of 85°C were 349 Pa, 377 Pa and 465 Pa respectively. Additional of 1 percent NanoFe reduced the initial resistivity of the smart cement by 16 percent. In a 24-hour period the maximum change in the electrical resistivity (RI 24 hr) for the smart cement without NanoFe was 333 percent. The RI 24hr for the smart cement with NanoFe increased with the amount of NanoFe. Addition of 1 percent NanoFe increased the compressive strength of the smart cement by 26 percent and 42 percent after 1 day and 28 days of curin...

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Characterizing Curing Cement Slurries by Electrical Conductivity

Cited by 44 publications

References 27 publications

Prediction of interface conductivity of cement slurry during early hydration considering the effect of curing temperature and pressure

Prediction of interface conductivity of cement slurry during early hydration considering the effect of curing temperature and pressure

Electrical Resistivity of Concrete for Durability Evaluation: A Review

Iron Nanoparticle Modified Smart Cement for Real Time Monitoring of Ultra Deepwater Oil Well Cementing Applications

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