Evaluation of Methods to Correct the Effect of Temperature on Electrical Conductivity of Mortar
المؤلفون المشاركون
Rangelov, Milena
Nassiri, Somayeh
المصدر
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-9، 9ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-12-13
دولة النشر
مصر
عدد الصفحات
9
التخصصات الرئيسية
الملخص EN
Nondestructive methods to obtain the electrical conductivity (σ) or resistivity (ρ) of concrete are gaining popularity for durability evaluation.
However, these methods are susceptible to the effects of curing and conditioning, primarily temperature and degree of saturation.
Before σ of concrete at varied temperatures can be used for durability assessment, appropriate corrections must be made to account for the effect of temperature (T).
In this study, two existing and one new temperature correction methods were evaluated for 12 mortar mixtures varying in water-to-cementitious material ratio (w/cm) and the content and types of supplementary cementitious materials (SCM).
Mortar specimens instrumented with embedded sensors were cured in sealed conditions for 11–13 months.
After this period, the sealed specimens were subjected to stepwise temperature change in 5–50°C range while σ was recorded using the embedded sensors.
Linear, bilinear, and Arrhenius temperature correction (LTC, BLTC, and ATC, respectively) were fitted to the obtained σ-T datasets and were evaluated for fitness.
LTC provided an acceptable fit to the σ-T data (R2 > 0.81) but was found the most suitable in 5–30°C temperature range.
BLTC was defined as a combination of two distinct LTC below and above the reference temperature at 23°C and had a better fit to the data (R2 > 0.96).
Lastly, ATC showed the best fit among the tested methods (R2 > 0.98) and was found applicable for the full tested temperature range.
Comparison of correction coefficients among the mixtures indicated that increase in w/cm results in less sensitivity of σ to temperature.
Mixtures with SCM generally exhibit higher temperature sensitivity compared to the corresponding plain mixture.
Since the variations in correction coefficients were not substantial (less 18% variation among 10 of 12 mixtures), a single value of activation energy of conduction (Ec) at 32 kJ/mol was identified as the general recommendation for all the tested mixtures.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Rangelov, Milena& Nassiri, Somayeh. 2018. Evaluation of Methods to Correct the Effect of Temperature on Electrical Conductivity of Mortar. Advances in Civil Engineering،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1116908
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Rangelov, Milena& Nassiri, Somayeh. Evaluation of Methods to Correct the Effect of Temperature on Electrical Conductivity of Mortar. Advances in Civil Engineering No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1116908
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Rangelov, Milena& Nassiri, Somayeh. Evaluation of Methods to Correct the Effect of Temperature on Electrical Conductivity of Mortar. Advances in Civil Engineering. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1116908
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1116908
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر