TY - JOUR
T1 - Effect of shrinkage reducing admixture on tensile and flexural behaviors of UHPFRC considering fiber distribution characteristics
AU - Yoo, Doo Yeol
AU - Kang, Su Tea
AU - Lee, Joo Ha
AU - Yoon, Young Soo
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012R1A2A1A05026406 ).
PY - 2013
Y1 - 2013
N2 - This study investigated the effect of shrinkage reducing admixture (SRA) on the properties of ultra high performance fiber reinforced concrete (UHPFRC) including fluidity, compressive, single fiber pullout, tensile and flexural behaviors. In addition, the influence of fiber distribution characteristics such as fiber orientation, fiber dispersion, number of fibers, and packing density on the flexural behavior of UHPFRC was evaluated according to the amount of SRA, using an image processing technique that was developed. Three different SRA to cement weight ratios (0%, 1%, and 2%) were investigated on UHPFRC with 2 vol.% of steel fibers. The specimen without SRA exhibited the best performance in compressive, single fiber pullout, and tensile behaviors including load carrying capacity, strain capacity, and energy absorption capacity and had a highly densified interfacial transition zone between fiber and matrix. In particular, the flexural strength of UHPFRC varied with the fiber distribution characteristics, rather than the amount of SRA.
AB - This study investigated the effect of shrinkage reducing admixture (SRA) on the properties of ultra high performance fiber reinforced concrete (UHPFRC) including fluidity, compressive, single fiber pullout, tensile and flexural behaviors. In addition, the influence of fiber distribution characteristics such as fiber orientation, fiber dispersion, number of fibers, and packing density on the flexural behavior of UHPFRC was evaluated according to the amount of SRA, using an image processing technique that was developed. Three different SRA to cement weight ratios (0%, 1%, and 2%) were investigated on UHPFRC with 2 vol.% of steel fibers. The specimen without SRA exhibited the best performance in compressive, single fiber pullout, and tensile behaviors including load carrying capacity, strain capacity, and energy absorption capacity and had a highly densified interfacial transition zone between fiber and matrix. In particular, the flexural strength of UHPFRC varied with the fiber distribution characteristics, rather than the amount of SRA.
KW - Image analysis (B)
KW - Interfacial transition zone (B)
KW - Mechanical properties (C)
KW - Shrinkage (C)
KW - Ultra high performance fiber reinforced concrete
UR - http://www.scopus.com/inward/record.url?scp=84885393606&partnerID=8YFLogxK
U2 - 10.1016/j.cemconres.2013.09.006
DO - 10.1016/j.cemconres.2013.09.006
M3 - Article
AN - SCOPUS:84885393606
SN - 0008-8846
VL - 54
SP - 180
EP - 190
JO - Cement and Concrete Research
JF - Cement and Concrete Research
ER -