Transient creep strain of fly ash concrete at elevated temperatures-Reference-Cited by-同舟云学术

Transient creep strain of fly ash concrete at elevated temperatures

Published:2022-11 Issue:22 Volume:74 Page:1176-1187
ISSN:0024-9831
Container-title:Magazine of Concrete Research
language:en
Short-container-title:Magazine of Concrete Research

Author:

Fan Kunjie¹²,Li Jiabin³,He Zhihai⁴,Liu Qingfeng⁵,Yao Yao⁶⁷

Affiliation:

1. Associate Professor, School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an, China

2. School of Engineering; former PhD student, University of Plymouth, Plymouth, UK

3. Professor, Research Group RecyCon, Department of Civil Engineering, KU Leuven, Bruges, Belgium

4. Associate Professor, School of Civil Engineering, Shaoxing University, Shaoxing, China

5. Associate Professor, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China

6. Professor, School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an, China (corresponding author: )

7. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an, China

Abstract

Accurate modelling of transient creep strain (TRC) is crucial for reliable fire performance assessments of concrete structures, since it is the largest strain component for structural concrete subjected to thermal exposure. Nonetheless, the mechanism underlying TRC is still not fully understood and most of the available models were established based on ordinary Portland cement concrete. As the most widely used supplemental cementitious material, the effect of fly ash on the development of TRC still requires further study. For this paper, steady state tests and transient state tests were carried out on ordinary Portland cement concrete (CEM I 52.5 as per BS EN 197-1, water/cement = 0.5) and fly ash concrete (class F fly ash as per BS EN 450-1, 25% replacement percentage), respectively. It was found that replacing 25% ordinary Portland cement with class F fly ash in concrete can mitigate the development of TRC above 400°C. Based on the experimental results, one assumption of the influence mechanism of class F fly ash on TRC is made and a TRC model for fly ash concrete (class F, 25% replacement percentage) at elevated temperatures is proposed.

Publisher

Thomas Telford Ltd.

Subject

General Materials Science,Building and Construction,Civil and Structural Engineering

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/jmacr.21.00267

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