Journal Published Online: 12 September 2018
Volume 47, Issue 3

Effect of Aging and Temperature on the Viscosity of the Adhesive Used for Retard-Bonded Prestressed Systems

CODEN: JTEVAB

Abstract

The viscosity of Retard-Hardening Adhesive (RHA) varies with the hardening of resin-based materials and greatly affects the workability and prestress loss of retard-bonded prestressed systems. So far, the effect of aging time on the viscosity of the RHA has not been revealed, which hampers the further application of Retard-Bonded Prestressed Reinforcements. In the current article, therefore, an experimental study is developed to evaluate the effect of aging time on the viscosity of RHA. Different exposure temperatures and hardening periods of RHA are considered in the rheological test. Test results show that when the aging time and exposure temperature remain the same, and as the shear rate increases, the viscosity of the RHA firstly decreases rapidly and then remains basically constant. The peak viscosity increases with the aging time, exposure temperature, or both. The effects of temperature on the peak viscosity are different at different stages of aging. The effect of the hardening period on the peak viscosity can be eliminated by introducing the relative aging time. Finally, an empirical model is suggested to predict the peak viscosity of the RHA at different aging times, and the results show that the proposed model agrees well with the experimental results.

Author Information

Zhang, Xue
State Key Laboratory of Coastal and Offshore Engineering, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Ganjingzi District, Dalian, China
Fan, Xinglang
School of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, China
Jiang, Fangxin
China Building Technique Group Co., Ltd, Beijing, China
Liu, Fan
State Key Laboratory of Coastal and Offshore Engineering, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Ganjingzi District, Dalian, China
Yin, Yuan
State Key Laboratory of Coastal and Offshore Engineering, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Ganjingzi District, Dalian, China
Jin, Hongyi
State Key Laboratory of Coastal and Offshore Engineering, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Ganjingzi District, Dalian, China
Pages: 16
Price: $25.00
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Stock #: JTE20180066
ISSN: 0090-3973
DOI: 10.1520/JTE20180066