Axial Compressive Behavior of Recycled Aggregate Concrete Columns Externally Confined By Square Steel Tube

2017 ◽  
Vol 10 (01) ◽  
pp. 01-04 ◽  
Author(s):  
ZHONGJUN HU ◽  
XUEJIAO SONG
Keyword(s):  
Concrete Columns ◽  
Steel Tube ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Compressive Behavior ◽  
Aggregate Concrete ◽  
Square Steel Tube

scholarly journals Bond Properties of RAC-Filled Square Steel Tubes after High Temperature

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Wanjie Zou ◽  
Jiongfeng Liang ◽  
Guangwu Zhang ◽  
Haifeng Yang
Keyword(s):  
Coarse Aggregate ◽  
Concrete Strength ◽  
Steel Tube ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Bond Properties ◽  
Steel Tubes ◽  
Aggregate Concrete ◽  
Recycled Coarse Aggregate ◽  
Square Steel Tube

This paper presents the results of an experimental study to investigate the influence of high temperatures on the bond properties between the recycled coarse aggregate (RCA) concrete and square steel tubes. A total of 27 pushout recycled aggregate concrete- (RAC-) filled square steel tube specimens are cast and heated under five different temperatures (20°C, 200°C, 400°C, 600°C, and 800°C) for testing. The main parameters considered in the test are temperature, exposure time of heating, RCA replacement ratio, interface length-to-width ratio, and concrete strength. The experimental results indicate that the bond strength for recycled coarse aggregate concrete and square steel tube increases with increasing temperatures.

Eccentric compressive behavior of recycled aggregate concrete columns after freezing and thawing cycles

2018 ◽  
Vol 21 (15) ◽  
pp. 2299-2310 ◽  
Author(s):  
Jiachuan Yan ◽  
Kaihua Liu ◽  
Chaoying Zou ◽  
Jian Wang
Keyword(s):  
Coarse Aggregate ◽  
Concrete Columns ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Compressive Behavior ◽  
Freezing And Thawing ◽  
Replacement Ratio ◽  
Aggregate Concrete ◽  
Recycled Coarse Aggregate ◽  
Freezing And Thawing Cycles

The eccentric compressive behavior of 18 recycled aggregate concrete columns after freezing and thawing cycles were investigated. The effect of the number of freezing and thawing cycles, the replacement ratio of recycled coarse aggregate, and the eccentricity of axial loading on the eccentric compressive behavior of columns was analyzed. The results show that the strain distribution along the depth of cross section of columns was plane during the eccentric compression test after freezing and thawing cycles. With the increase in the freezing and thawing cycles and the replacement ratio of recycled coarse aggregate, the failure modes of partial specimens turned from ductile tension failure to brittle compression failure. Two existing design methods for calculating the bearing capacity of conventional concrete columns subjected to eccentric compressive loading were verified to be effective for evaluating that of recycled aggregate concrete columns after limited freezing and thawing cycles.

A critical assessment of the compressive behavior of reinforced recycled aggregate concrete columns

2018 ◽  
Vol 161 ◽  
pp. 161-175 ◽  
Author(s):  
Jin-Jun Xu ◽  
Zong-Ping Chen ◽  
Togay Ozbakkaloglu ◽  
Xin-Yu Zhao ◽  
Cristoforo Demartino
Keyword(s):  
Concrete Columns ◽  
Critical Assessment ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Compressive Behavior ◽  
Aggregate Concrete
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