Loh, Poh-Yee and Shafigh, Payam and Ibrahim, Zainah (2024) The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio. Construction and Building Materials, 411. ISSN 0950-0618, DOI https://doi.org/10.1016/j.conbuildmat.2023.134525.
Full text not available from this repository.Abstract
Corrosion of steel is an electrochemical process that is affected by pH and potential difference. The pH of con-crete may change due to physical, chemical, and biological influence over time. Therefore, it is important to measure and monitor the pH of reinforced concrete as a structural health monitoring parameter related to durability. Ex-situ leaching (ESL) method is commonly applied to produce the equilibrated aqueous solutions for the pH measurement of cement-based materials. However, there are limited studies about the effect of leaching time, leaching technique and water-to-solid (w/s) ratio when applying this method. This may lead to underes-timation of pH and unnecessary prolonged leaching time. The solution temperature compensated pH value was used during analysis of the data. By testing on the OPC mortar with cement-to-sand ratio of 1:3 and water-to -cement ratio of 0.55, the optimum w/s ratio and minimum leaching time are 2 and 5 min, respectively. The minimum quantity for solid per sample shall not be less than 5.0 g. The findings of this research will contribute to a more accurate pH measurement and may play a part in regulating a standard for cement-based materials.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Ex-situ leaching; ESL; Alkaline; pH; Equilibrium; Corrosion |
| Subjects: | N Fine Arts > NA Architecture T Technology > TH Building construction |
| Divisions: | Faculty of Engineering > Department of Civil Engineering Faculty of the Built Environment Faculty of the Built Environment > Department of Architecture |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 14 Jun 2024 04:13 |
| Last Modified: | 14 Jun 2024 04:13 |
| URI: | http://eprints.um.edu.my/id/eprint/44171 |
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