Recent research led by Payam Shafigh from the Department of Civil Engineering has unveiled a significant advancement in the measurement of pH values for cement-based materials (CBMs), a critical aspect of construction and civil engineering. As the industry increasingly relies on precise chemical measurements to ensure the durability and safety of structures, this study highlights the importance of temperature in pH testing, particularly in highly alkaline environments.
Traditionally, pH measurements have been conducted in acidic to slightly alkaline solutions, where temperature variations have minimal impact. However, CBMs, which are inherently alkaline, can exhibit a notable sensitivity to temperature changes. Shafigh notes, “A slight difference in temperature can affect the accuracy of the pH test result, which is crucial for ensuring the integrity of construction materials.” This revelation underscores the necessity for a refined approach to testing in the construction sector.
The research introduces a solution temperature compensation (STC) factor, which allows for the adjustment of measured pH values to a standard reference temperature of 25°C. This innovation is particularly vital for comparing the pH values of different CBMs accurately, a process that has been hindered by the lack of standardized methods in the past. Shafigh’s team developed a simple method for generating a pH-temperature profile, which is instrumental in calculating the solution temperature-compensated pH (pHSTC).
The implications of this research extend beyond academic interest; they resonate deeply within the construction industry. Accurate pH measurements can influence material selection, mix designs, and ultimately, the longevity of structures. As Shafigh emphasizes, “By minimizing the influence of temperature on pH measurements, we can enhance the reliability of our materials, leading to safer and more durable constructions.”
This study not only fills a critical gap in existing literature but also sets the stage for future developments in construction practices. With the construction sector increasingly focused on sustainability and longevity, the ability to accurately assess the properties of CBMs could lead to innovations in material science and engineering techniques.
The findings of this research are published in the ‘Journal of Engineering’, which serves as a vital resource for professionals seeking to stay informed on the latest advancements in the field. For more information about Payam Shafigh and his work, you can visit the Department of Civil Engineering.
