Loh, Poh-Yee and Shafigh, Payam and Katman, Herda Yati and Ibrahim, Zainah (2024) Effect of filtering method on the pH measurement of cement mortar in ex-situ leaching. Heliyon, 10 (4). e25859. ISSN 2405-8440, DOI https://doi.org/10.1016/j.heliyon.2024.e25859.
Full text not available from this repository.Abstract
The high alkaline condition of concrete naturally protects embedded steel bars from corrosion by forming a passive protective film. The pH of concrete is generally high, but concrete with different mix compositions may have various pH values. The pH of concrete may decrease over time due to long-term mechanical, chemical, biological and physical factors. Therefore, monitoring the pH value of concrete is crucial to checking if its alkalinity is within an acceptable range and ensuring that the concrete structure is in good health condition. However, the pH measurement for cementbased materials is not standardised. Ex-situ leaching, one of the recommended methods for pH measurement, is simple and practical. In this method, the sample will be crushed, leached and tested using a pH electrode probe. The lifespan of the pH electrode probe may decrease due to the existing suspended particles in the solution. Therefore, one recommendation is to filter the solution before using the probe. In this study, the effect of different filtering setups on the pH value of a cement mortar with a cement-to-sand ratio of 1:3 was evaluated. pH test results showed that filtering can produce similar outcomes to those without filtering, regardless of the type of filter paper and its pore size. However, filtering is strongly recommended for electrode protection of the pH meter. As an innovative filtering setup for cement-based materials, syringe filtering was introduced in this study because it is more economical and its operation is simpler compared to the other methods.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaya research grant (MG002-2021), PKN Building Solutions Sdn, Bhd. through Universiti Malaya (PV023-2021) |
| Uncontrolled Keywords: | pH value; pH measurement; Ex -situ leaching; Filtering setup; Cement mortar; Syringe filtering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction |
| Divisions: | Faculty of Engineering > Department of Civil Engineering Faculty of the Built Environment |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 06 Nov 2024 02:58 |
| Last Modified: | 06 Nov 2024 02:58 |
| URI: | http://eprints.um.edu.my/id/eprint/45606 |
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