Mechanical Properties and Volume Deformation of Steel Fiber Reinforced Micro-Expansive Concrete Filled Steel Tube

Abstract:

Abstract: Steel fiber reinforced micro-expansive concrete (SREC) with excellent fluidity, high resistance to segregation and good self-compacting ability was prepared. Compressive test, splitting tensile test and flexural test were performed. Self-developed confined expansion test instrument of concrete filled steel tube (CFST) was used to evaluate the deformation behaviors of SREC confined in the steel tube. The structure behavior of steel fiber reinforced micro-expansive concrete filled steel tube (SECFST) was investigated through 12 short column specimens. Expansion agent invariant and steel fiber contents were the dominant variables. The results showed that when compared to common micro-expansive concrete, the splitting tensile and flexural strength of SREC were increased by 78.0% and 64.7%, respectively. When the expansion agent amount was 40kg and volume fraction of steel fiber was less than 1%, SECFST exhibited stable expansive deformation. The use of steel fiber combined with expansion agent moderately improved the yield load and ultimate load of CFST.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 4083-4087
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.4083
• Online since: October 2012
• Authors: Xiao Jun Zhou, Ting Min Mou, Bi Kun Fan, Qing Jun Ding
• Keywords: Bearing Capacity, Concrete-Filled Steel Tube (CFST), Confined Expansion Rate, Mechanical Property, Steel Fiber (SF), Volume Deformation

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