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The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio

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 monit...

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Main Authors: Loh, Poh-Yee, Shafigh, Payam, Ibrahim, Zainah
Format: Article
Published: Elsevier 2024
Subjects:
NA Architecture
TH Building construction
Online Access:http://eprints.um.edu.my/44171/
https://doi.org/10.1016/j.conbuildmat.2023.134525
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spelling my.um.eprints.441712024-06-14T04:13:30Z http://eprints.um.edu.my/44171/ The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio Loh, Poh-Yee Shafigh, Payam Ibrahim, Zainah NA Architecture TH Building construction 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. Elsevier 2024-01-12 Article PeerReviewed 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 <https://doi.org/10.1016/j.conbuildmat.2023.134525>. https://doi.org/10.1016/j.conbuildmat.2023.134525 10.1016/j.conbuildmat.2023.134525
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic NA Architecture
TH Building construction
spellingShingle NA Architecture
TH Building construction
Loh, Poh-Yee
Shafigh, Payam
Ibrahim, Zainah
The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio
description 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.
format Article
author Loh, Poh-Yee
Shafigh, Payam
Ibrahim, Zainah
author_facet Loh, Poh-Yee
Shafigh, Payam
Ibrahim, Zainah
author_sort Loh, Poh-Yee
title The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio
title_short The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio
title_full The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio
title_fullStr The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio
title_full_unstemmed The pH measurement of cement-based materials: Effect of leaching time, leaching technique and water-to-solid ratio
title_sort ph measurement of cement-based materials: effect of leaching time, leaching technique and water-to-solid ratio
publisher Elsevier
publishDate 2024
url http://eprints.um.edu.my/44171/
https://doi.org/10.1016/j.conbuildmat.2023.134525
_version_ 1805881129672114176
score 13.211869

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