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Solution Temperature Compensation Factor for the Measured pH Value of Cement‐Based Materials
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Solution Temperature Compensation Factor for the Measured pH Value of Cement‐Based Materials
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Journal Article
Solution Temperature Compensation Factor for the Measured pH Value of Cement‐Based Materials
2025
Overview
Most of the conventional pH measurements were carried out in acidic to slightly alkaline solutions. In this pH range, the effect of temperature during the measurement is negligible and can be ignored. However, the pH value for highly alkaline solutions is considerably sensitive to their temperature change. A slight difference in temperature can affect the accuracy of the pH test result. Cement‐based materials (CBMs) are highly alkaline. The influence of temperature shall be minimised to compare the pH values of different CBMs precisely. In the literature related to pH measurement for CBMs, the solution temperature during the pH measurement was not recorded, whilst the room temperature recorded was in the range of 20°C–30°C. Therefore, solution temperature compensation (STC) shall be introduced into the pH measurement for CBMs to convert the measured pH into the pH value at a reference temperature of 25°C. To this end, firstly, the pH–temperature profile of the solutions was generated to identify the STC factor (
f
STC
, also known as solution temperature coefficient). Then, the solution temperature‐compensated pH (pH
STC
) was calculated using
f
STC
to present the pH value in the reference temperature of 25°C. However, no standardised method exists for the generation of this pH–temperature profile. In this study, a simple method for generating pH–temperature profile and calculating pH
STC
for CBMs was introduced.
Publisher
John Wiley & Sons, Inc,Wiley
