Bond-slip constitutive relation between BFRP bar and basalt fiber recycled-aggregate concrete

In order to research the interface bond-slip behaviors of recycled aggregate concrete-filled square steel tube (RACFSST), ten specimens using waste concrete were designed for launch test. The three changing parameters were concrete strength grade, embedded length and recycled coarse aggregate replacement rate. The load–slip curves of square steel tubes and recycled aggregate concrete were obtained, and starting bond strength and ultimate bond strength influenced by each changing parameter were analyzed. The results show that the replacement rate had a slight influence on the starting bond strength and ultimate bond strength, while the embedded length had the opposite effect. The shorter embedded length specimens had larger bond strength. The concrete strength had a relatively large influence on them.

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Basic Mechanical Properties of Basalt Fiber Reinforced Recycled Aggregate Concrete

The Open Civil Engineering Journal ◽

10.2174/1874149501711010043 ◽

2017 ◽

Vol 11 (1) ◽

pp. 43-53 ◽

Cited By ~ 4

Author(s):

Huaxin Liu ◽

Jianwei Yang ◽

Xiangqing Kong ◽

Xuxu Xue

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Basalt Fiber ◽

Recycled Concrete ◽

Recycled Aggregate Concrete ◽

Recycled Aggregate ◽

Mixing Ratio ◽

Fiber Reinforced ◽

Aggregate Concrete ◽

Chopped Basalt Fiber

In order to study the basic mechanical properties of basalt fiber reinforced recycled aggregate concrete, the concrete mix ratio, the length and the volume mixing ratio of chopped basalt fiber yarn are designed for changing factors. A total of 324 specimens have been completed for this investigation. The compressive strength, splitting tensile strength, elastic modulus and axial compressive strength of basalt fiber recycled concrete have carried on the experimental study and theoretical analysis as 81 specimens, respectively. In all specimens, coarse aggregate were replaced by recycled aggregate with a replacement rate of 100%. Experimental results show that the failure process and failure pattern of basalt fiber recycled concrete and ordinary concrete are similar; With the improvement of concrete strength grade; When the volume mixing ratio of chopped basalt fiber yarn is 0.2%, the mechanic performance can effectively improve, and the length of chopped basalt fiber has less effect on the mechanical indexes; The conversion relation between common concrete mechanics index is no longer suitable for basalt fiber recycled concrete, new conversion formulas for basalt fiber recycled concrete between the mechanics index were presented through fitting experimental data.

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Bond behavior between BFRP bar and recycled aggregate concrete reinforced with basalt fiber

Construction and Building Materials ◽

10.1016/j.conbuildmat.2016.12.161 ◽

2017 ◽

Vol 135 ◽

pp. 477-483 ◽

Cited By ~ 23

Author(s):

Huaxin Liu ◽

Jianwei Yang ◽

Xuezhi Wang

Keyword(s):

Basalt Fiber ◽

Recycled Aggregate Concrete ◽

Recycled Aggregate ◽

Aggregate Concrete ◽

Bond Behavior

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Experimental Study on Bond-Slip between Steel Bar and Recycled Aggregate Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.1651 ◽

2011 ◽

Vol 250-253 ◽

pp. 1651-1656 ◽

Cited By ~ 4

Author(s):

Qing Feng Huang ◽

Da Fu Wang

Keyword(s):

Concrete Strength ◽

Concrete Cover ◽

Recycled Concrete ◽

Recycled Aggregate Concrete ◽

Recycled Aggregate ◽

Aggregate Concrete ◽

Bond Slip ◽

Pull Out ◽

Steel Bar ◽

Cover Thickness

By a static and repeated pull-out experiment between steel bar and recycled aggregate concrete, and bond-slip curves between recycled concrete with different recycled coarse aggregate(RCA) replacement percentages were recorded. Based on the analysis of the experimental results, replacement percentages of recycled concrete, cover thickness, anchorage length, concrete strength and loading method was investigated. At last, the bond-slip constitutive relation was also discussed.

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