دورية أكاديمية
A Mathematical Model for the Electrical Resistivity of Cement Paste at Early Ages Considering the Partially Saturated State
| العنوان: | A Mathematical Model for the Electrical Resistivity of Cement Paste at Early Ages Considering the Partially Saturated State |
|---|---|
| المؤلفون: | Ye Tian, Xin Xu, Haodong Ji, Zushi Tian, Xianyu Jin, Nanguo Jin, Dongming Yan, Shengwen Tang |
| المصدر: | Materials, Vol 13, Iss 15, p 3306 (2020) |
| بيانات النشر: | MDPI AG, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Technology LCC:Electrical engineering. Electronics. Nuclear engineering LCC:Engineering (General). Civil engineering (General) LCC:Microscopy LCC:Descriptive and experimental mechanics |
| مصطلحات موضوعية: | cement paste, hydration degree, electrical resistivity, temperature, partially saturated, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85 |
| الوصف: | For cementitious materials, electrical resistivity is often used in the study of the cement hydration process at early age, as one of the few indicators that can be continuously and non-destructively monitored. Variation characteristics of resistivity are widely reported to interact with the early-age performance of cement paste, such as hydration kinetics parameters and setting time. However, there is no reasonable mathematical model to predict the resistivity at early ages, especially within the first 24 h, due to significant changes in the porosity and degree of saturation. In this work, a mathematical model was developed by considering the partially saturated state and density change of C-S-H (calcium silicate hydrate). To verify the model, two experimental methods were chosen, including the non-contact electrical resistivity test and isothermal calorimetry test. The hydration heat and resistivity of cement paste with a water–cement ratio of 0.35 and 0.45 were continuously monitored for 3 days. In the resistivity test, embedded temperature sensors were used to monitor the internal temperature and temperature correction was treated carefully in order to obtain accurate data. The test results prove that the mathematical model can accurately predict electrical resistivity and describe the saturation state of early-age cement pastes under sealed curing. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1996-1944 |
| Relation: | https://www.mdpi.com/1996-1944/13/15/3306; https://doaj.org/toc/1996-1944 |
| DOI: | 10.3390/ma13153306 |
| URL الوصول: | https://doaj.org/article/182c9794e19b499b9b520a4f5e9edd15 |
| رقم الأكسشن: | edsdoj.182c9794e19b499b9b520a4f5e9edd15 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19961944 |
|---|---|
| DOI: | 10.3390/ma13153306 |