Experimental evaluation of early-age thermal behavior of fly ash concrete using semi-adiabatic calorimetry

  • Ngo Duc Chinh

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam

  • Do Anh Tu

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam

  • Hoang Thi Tuyet

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam

  • Do Van Thang

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam

  • Do Trong Nguyen

    PhD student at the Faculty of Civil Engineering, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam

  • Ho Quang Huy

    Student at the Faculty of Civil Engineering, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
DOI: https://doi.org/10.47869/tcsj.77.4.18
Email: doanhtu@utc.edu.vn
Từ khóa: Semi-adiabatic calorimetry, early-age concrete, fly ash concrete, temperature development, hydration heat.

Tóm tắt

Early-age temperature development of concrete is governed by the balance between hydration heat generation and heat dissipation to the surrounding environment. Adiabatic calorimetry is commonly regarded as the most accurate experimental method for determining hydration-related thermal parameters of concrete; however, it requires complex equipment and is relatively costly. In contrast, semi-adiabatic calorimetry offers a simpler and more economical alternative. This study experimentally investigates the semi-adiabatic temperature development of concrete mixtures with different fly ash replacement levels. Four mixtures containing 0%, 10%, 20%, and 30% fly ash by mass of cementitious materials were tested using a laboratory calorimeter operated under semi-adiabatic mode. Concrete and chamber air temperatures were continuously monitored, and key thermal indicators were evaluated. The results show that increasing fly ash replacement reduces both the peak temperature and the overall temperature rise under consistent testing conditions. The temperature rise (ΔT) decreased from 23.9 °C to 17.5 °C as fly ash replacement increased from 0% to 30%. The reduction in temperature rise does not follow a strictly linear trend, and no clear monotonic relationship was observed for the time to peak temperature. Semi-adiabatic calorimetry is shown to provide reliable comparative indicators for preliminary assessment of early-age thermal behavior of concrete mixtures.

Tài liệu tham khảo

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Experimental evaluation of early-age thermal behavior of fly ash concrete using semi-adiabatic calorimetry
Nhận bài
08/01/2026
Nhận bài sửa
21/03/2026
Chấp nhận đăng
26/03/2026
Xuất bản
15/05/2026
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Kiểu trích dẫn
Ngo Duc, C., Do Anh, T., Hoang Thi, T., Do Van, T., Do Trong, N., & Ho Quang, H. (1778778000). Experimental evaluation of early-age thermal behavior of fly ash concrete using semi-adiabatic calorimetry. Tạp Chí Khoa Học Giao Thông Vận Tải, 77(4), 583-593. https://doi.org/10.47869/tcsj.77.4.18

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