Mix Design Method and Uniaxial Tensile Characteristics of Ultra-High Performance Concrete
This paper proposed a new mix design method of ultra-high performance concrete (UHPC) based on the maximum particle packing density, and the modified Andreasen & Andersen particle packing model was used to calculate the quartz sand grading. Density test and single variable trial-mixing test were employed to design the remain parameters of the concrete mixture, and one group of mix proportion with better strength and fluidity was selected based on the test results. Then, the compressive and uniaxial tensile tests were performed to study the compressive strength and the influence of fiber volume content on the tensile characteristic of UHPC. The test results show that: the compressive strength of UHPC is between 116.64 MPa and 134.85 MPa, tensile strength is between 4.761 MPa and 8.504 MPa, and the tensile strength and toughness increase greatly with the increase of fiber volume content. Additionally, the brittleness failure mode transfers into ductile failure. The results of this paper provide a reference for the application of this kind of materials.
Keywords: Ultra High Performance Concrete(UHPC), mix design, compressive strength, tensile strength, toughness
BACHE H H. The new strong cements:their use in structures[J]. Physics in Technology. 1988.19(2):43-50.
CRC* Technology. Compact reinforced composite[EB/OL], [2017-01-17]. www. crc-tech. dk.
AARUP B. JENSEN L R. Compact reinforced concrete CRC: Applications of fiber-reinforced high-performanceconcrete[ J]. Concrete Plant and Precast Technology, 2008,74( 10): 18 26.
BACHE A. CRC-a special fiber reinforced high performance concrete~C~//lnternaiional Symposium on Advances in Concrete through Science and Engineering. Bagneux. France; RILEM Publications.2004.
KAPTUN N. BLOM J. A new CRC (Compact Reinforced Composite) bridge deck[C]//The 18th B1BM International-Congress. Amsterdam, Netherlands,2005:1 -7.
ZHENG W Z,L1 L. Preparation and mix proportion calculation of reactive powder concrete [J]. Journal of Hunan University (Natural Sciences) ,2009,36 (2):13 - 17. (In Chinese)
HE F, HUANG Z Y. Study on the effect of materials on RPC strength [J]. Journal of Hunan University (Natural Sciences), 2001,28 (2) :89-94. (In Chinese)
FANG Z. XIANG Y. KUANG Z. et al. Fatigue properties of reactive powder concrete with different steel fiber ratio [J]. Journal of Hunan University (Natural Sciences) .2011.38 (6): 6--12. (In Chinese)
YAN G J. Experimental study on 200 MPa reactive powder concrete[j]. Journal of the China Railway Society. 2004. 26 (2): 116-119. (In Chinese)
SHAN Â. Experimental research on mechanical properties of RPC [D]. Changsha: School of Civil Engineering. I lunan University. 2002:13. (In Chinese)
TAN B. Research on stress-strain curves of reactive powder concrete under uniaxial compression [D]. Changsha; School of Civil Engineering, Hunan University,2007:24. (In Chinese)
YANG Z H. Studyon tension mechanical performance of reactive powder concrete in different steel fiber volume fractions [D]. Beijing: School of Civil Engineering, Beijing Jiaotong University.
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