scholarly journals Behaviour of Reactive Powder Concrete Columns without Steel Ties

2008 ◽  
Vol 6 (2) ◽  
pp. 377-386 ◽  
Author(s):  
Adnan R. Malik ◽  
Stephen J. Foster
Keyword(s):  
Concrete Columns ◽  
Reactive Powder Concrete ◽  
Reactive Powder

Study on the compression performance of steel reactive powder concrete columns

2020 ◽  
Vol 23 (10) ◽  
pp. 2018-2029
Author(s):  
Hongbing Li ◽  
Fangbo Wu ◽  
Liangtao Bu ◽  
Yong Liu ◽  
Jiang Yao
Keyword(s):  
Failure Mode ◽  
Axial Compression ◽  
Ductile Failure ◽  
Concrete Columns ◽  
Compression Testing ◽  
Reactive Powder Concrete ◽  
Sudden Increase ◽  
Eccentric Load ◽  
Eccentric Compression ◽  
Reactive Powder

In this study, the mechanical properties and failure characteristics of steel reactive powder concrete columns with different strength grades were investigated through compression testing. Six steel reactive powder concrete columns were tested; three columns underwent axial compression testing and three columns underwent eccentric compression testing. The results of the axial compression testing showed that steel and reactive powder concrete could work cooperatively at the initial stage, and the final column failure mode was primarily splitting failure at the end of the column, with the formation of a main crack in the longitudinal direction extending to the middle of the column. The results of the eccentric compression testing showed that the eccentrically loaded steel reactive powder concrete columns had comparatively strong deformability. The columns presented ductile failure mode under the eccentric load with 0.2 eccentricity. The final failure of the column involved a sudden increase in the horizontal crack width on the tension side, the steel flange on the tension side reached the yield state, the reactive powder concrete in the middle of the compressive side was crushed, and the reactive powder concrete surface layer burst open and partially spalled off. According to the test results and with reference to the relevant standards, equations for calculating the approximate ultimate bearing capacities of axially and eccentrically compressed reactive powder concrete columns were proposed.

Strengthening of Modified Reactive Powder Concrete Columns with CFRP

2016 ◽  
Vol 10 (1) ◽  
pp. 107-123
Author(s):  
Mutaz Kadhim Medhlom ◽  
◽  
Mohammed Hashim Mohammed ◽  
Keyword(s):  
Concrete Columns ◽  
Reactive Powder Concrete ◽  
Reactive Powder

scholarly journals Experimental Investigation of Short Square Normal and Hybrid Fiber Reactive Powder Concrete Columns Subjected to Chloride Solution Attack

2018 ◽  
Vol 24 (7) ◽  
pp. 75
Author(s):  
Mohammed Mosleh Salman ◽  
Husain Khalaf Jarallah ◽  
Raed Satar Al-Behadili
Keyword(s):  
Tap Water ◽  
Load Capacity ◽  
Concrete Columns ◽  
Experimental Program ◽  
Reactive Powder Concrete ◽  
Normal Concrete ◽  
Ultimate Load Capacity ◽  
Eccentric Load ◽  
Chloride Water ◽  
Reactive Powder

In this research, the structural behavior of reinforced concrete columns made of normal and hybrid reactive powder concrete (hybrid by steel and polypropylene fibers) subjected to chloride salts with concentration was 8341.6 mg/l. The study consists of two parts, the first one is experimental study and the second one is theoretical analysis.  Three main variables were adopted in the experimental program; concrete type, curing type and loading arrangement. Twenty (120x120x1200) mm columns were cast and tested depending on these variables. The samples were reinforced using two different bars; Ø8 for ties and Ø12 with minimum longitudinal reinforcement (0.01Ag). The specimens were divided into two main groups based on curing type: The first group consists of casting and testing of ten columns that cured in tap water for 28 days with two types of concrete (normal and hybrid), five columns for each type. While the second group consists of ten columns that direct cured and fully immersed in chloride water (8341.6 mg/l) 6 months with two types of concrete (normal and hybrid), five columns for each type. The specimens were tested under three types of loading, the first one is axial load, the second one is eccentric load with three different eccentricities (50,100 and 150) mm and where (e/h) are (0.42, 0.83 and 1.25) respectively from the center of column while the third type of loading is tested the specimens as beam. The experimental results showed an increase in ultimate load capacity and higher chlorides resisting for hybrid reactive powder concrete in comparison with normal concrete in both types of curing (tap and chloride water) through studying strain profile. Interaction diagram charts were obtained from different types of loading for each specimen. These charts showed high values for hybrid reactive powder concrete in comparison with normal concrete.  

scholarly journals Fire Resistance Performance of Reactive Powder Concrete Columns

2018 ◽  
Vol 22 (4) ◽  
pp. 67-82 ◽  
Author(s):  
Rungrawee Wattanapornprom ◽  
Daniel Nichol Reyes Valerio ◽  
Withit Pansuk ◽  
Thuc Nhu Nguyen ◽  
Phoonsak Pheinsusom
Keyword(s):  
Fire Resistance ◽  
Concrete Columns ◽  
Reactive Powder Concrete ◽  
Reactive Powder ◽  
Resistance Performance

Behavior of Reactive Powder Concrete Columns Under Eccentric Compression Loading

2014 ◽  
Vol 7 (3) ◽  
pp. 45-64
Author(s):  
Yaarub G. Abtan
Keyword(s):  
Failure Modes ◽  
Lateral Displacement ◽  
Concrete Columns ◽  
High Ratio ◽  
Concrete Cover ◽  
Steel Fibers ◽  
Reactive Powder Concrete ◽  
Substantial Variation ◽  
Concrete Type ◽  
Reactive Powder

The strength of concrete columns is controlled by the strength of the material and the geometry of the cross section. The use of Reactive Powder Concrete RPC technology has proven most popular with superior strength, stiffness and durability being the major advantages. An experimental investigation was carried into the behavior of RPC columns subjected to axial load with initial eccentricity. Twelve columns were prepared with 120mm square section at the midsection and were hunched at the ends to apply eccentric loading. The specimens were tested up to failure to evaluate the effects of the variation of the concrete type (normal or RPC), presence of steel fibers and longitudinal steel ratio. Experimental data on strength, lateral displacement and failure mode was obtained for each test. The comparative analysis of the experimental results showed that the use of RPC caused substantial variation in the ultimate strength and failure modes. Also, inclusion of steel fibers in RPC was an effective way to prevent spalling of the concrete cover and increase the ductility, as well as, high ratio of longitudinal reinforcement delays the buckling of the columns and increases strength.

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