—In this study, ultra high performance concrete
(UHPC) was used to investigate the effect of UHPC and its
precast product by the severe freeze-thaw testing. The UHPC to
be used as a precast product material contains a large amount
of cement and cementitious materials, a large amount of
superplasticizer, and a very small amount of water. The UHPC
mixes with eight different volumes of steel fibres were tested
and evaluated to find the optimum quality of precast
production. The results show that the mechanical properties of
UHPC possess high strength, ductility, and bond stress. The
results also indicate that most of UHPC specimens presented a
steady decrease in compressive and flexural strength after
freeze-thaw testing. The 2.5, 3.0 and 3.5% steel fibres by volume
were chosen and used in UHPC precast products, after UHPC
specimens were tested and finished on their performance
evaluations. The results show that the loading capacity of
UHPC precast products increased significantly after 600
free-thaw cycles. As a result of freeze-thaw resistance, the
appropriate mixes of UHPC applied in the precast products
have been obtained; it would provide a reference
manufacturing for the UHPC products.
—UHPC, freeze-thaw, precast product, ultra
high performance concrete.
Ming-Ju Lee is with the Jen-Teh Junior College of Medicine, Miaoli,
Taiwan (email: firstname.lastname@example.org).
Ming-Gin Lee and Yishuo Huang were with University of Florida,
Gainesville, FL 32601 USA. They are now with the Department of
Construction, Chaoyang University of Technology, Taichung 41349, Taiwan
(corresponding author's e-mail: email@example.com, firstname.lastname@example.org).
Kun-Long Lee is with the Department of Construction, Chaoyang
University of Technology, Taichung 41349, Taiwan (e-mail:
Cite:Ming-Ju Lee, Ming-Gin Lee, Yishuo Huang, and Kun-Long Lee, "UHPC Precast Concrete under Severe Freeze-Thaw
Conditions," International Journal of Engineering and Technology vol. 5, no. 4, pp. 452-456, 2013.