scholarly journals Fire Resistance Performance of High Strength Concrete with Fiber Types

2014 ◽  
Vol 14 (3) ◽  
pp. 223-229 ◽  
Author(s):  
Jeong-Jin Kim
Keyword(s):  
Fire Resistance ◽  
High Strength Concrete ◽  
High Strength ◽  
Fiber Types ◽  
Strength Concrete ◽  
Resistance Performance

Fire Resistance Performance of High-Strength Concrete Columns Reinforced with Pre-Stressed Wire Ropes

2013 ◽  
Vol 470 ◽  
pp. 880-883 ◽  
Author(s):  
Heung Youl Kim ◽  
Hyung Jun Kim ◽  
Kyung Hoon Park ◽  
Bum Youn Cho ◽  
Jae Sung Lee
Keyword(s):  
Fire Resistance ◽  
High Strength Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Concrete Column ◽  
Wire Ropes ◽  
Strength Concrete ◽  
Design Load ◽  
Resistance Performance ◽  
High Strength Concrete Columns

In this study, the fire resistance performance of high-strength concrete columns was evaluated to see the influence of lateral confinement reinforcement with wire ropes for improving ductility, fire resistance reinforcement with fiber cocktail and load ratio. For this, loaded fire test was conducted under ISO834 standard fire condition. The axial ductility of the 60MPa high-strength concrete column reinforced with pre-stressed wire ropes was improved and its fire resistance performance was also improved by 23% compared with its counterpart without wire ropes. The appropriate load for the 60MPa concrete column reinforced with wire ropes was found to be 70% of design load. The fire resistance performance of the 100MPa high-strength concrete column reinforced with pre-stressed wire ropes and fiber-cocktail was improved as much as 4 times compared with that reinforced with tie bars only. The appropriate load for the 100MPa columns was found to be less than 70% of design load in order for the columns to secure required fire resistance performance.

An Experimental Study on the Fire Resistance Performance and Spalling of 100MPa HSC Column Mixed with Fiber-Cocktail

2012 ◽  
Vol 472-475 ◽  
pp. 1370-1379 ◽  
Author(s):  
In Hwan Yeo ◽  
Heung Youl Kim ◽  
Hyung Jun Kim ◽  
Kyung Ok Kim ◽  
Chung Sup Oh
Keyword(s):  
Fire Resistance ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
High Strength ◽  
Cross Sectional ◽  
Strength Concrete ◽  
Steel Bar ◽  
Section Size ◽  
Resistance Performance

As the fire-resistance performance of high-strength concrete has emerged as a social issue and Korean Ministry of Land, Transport & Maritime Affairs has announced the standard for the fire-resistance performance of the concrete, studies to improve its fire-resistance have been conducted actively. In this paper, the study to develop high-strength concrete mixed with fiber-cocktail, a hybrid of polypropylene fiber and steel fiber was conducted. The fire-resistance test of 100MPa high-strength concrete and the analysis of steel bar temperatures for finding the optimal cross-sectional condition showed that the larger the section size is, the lower the temperature of steel bars is. It was also shown that the concrete columns with section sizes of 600mm x 600mm and 800mm x 800mm secure fire-resistance performance and the former is the optimal section size in terms of economic efficiency. The analysis of steel bar temperatures of the column having section size of 600mm x 600mm showed that the polypropylene fiber to steel fiber ratio of 1.5 to 40 (㎏/㎥) is the optimal for the fiber cocktail.

A Study on the Collapse Mechanism of High Strength Concrete Columns Apply to Fiber-Cocktail

2015 ◽  
Vol 784 ◽  
pp. 385-390
Author(s):  
Ki Seok Kwon ◽  
Heung Youl Kim ◽  
Seung Un Chae ◽  
Bum Yean Cho
Keyword(s):  
Fire Resistance ◽  
High Strength Concrete ◽  
Performance Testing ◽  
High Strength ◽  
Collapse Mechanism ◽  
Hybrid Fiber ◽  
Strength Concrete ◽  
High Rise ◽  
Resistance Performance ◽  
Economic Considerations

More high-rise structures are currently being constructed and correspondingly, the compressive strength of concrete has been increased. However, compared to conventional strength concrete the high strength concrete (HSC) exhibits coarse inner pore structure which blocks escape routes of vapour generated in the event of fire. This results in spalling and subsequently, are responsible for fire vulnerability of the structure. In addition, spalling phenomena is also affected by the section dimensions of HSC which is also another crucial factor from socio-economic considerations. Thus, this study was carried out to evaluate the fire resistance performance of hybrid fiber (i.e. steel-polypropylene-fibre)-reinforced HSC columns with different cross-section dimensions. The result of the fire resistance performance testing using 100MPa concrete showed that delay to failure was observed by approximately 76 per cent.

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