High-Temperature Properties of Concrete for Fire Resistance Modeling of Structures

2008 ◽  
Vol 105 (5) ◽  
Keyword(s):  
High Temperature ◽  
Fire Resistance ◽  
High Temperature Properties ◽  
Resistance Modeling

Studies on Effect of Refractory Chemicals on Cement Mortar

2011 ◽  
Vol 82 ◽  
pp. 184-189
Author(s):  
Narayana Suresh ◽  
Ramaswamy Jeyalakshmi ◽  
Uma Suresh
Keyword(s):  
High Temperature ◽  
Calcium Hydroxide ◽  
Fire Resistance ◽  
Cement Mortar ◽  
Concrete Structures ◽  
Previous Experience ◽  
Hydration Products ◽  
High Temperature Properties ◽  
Concrete Admixtures ◽  
Physical Changes

Concrete has remarkable fire resistance properties. In the case of fire, it is found that the concrete affected by fire depends to a great extent on the intensity and duration of fire. Previous experience has shown that concrete structures are likely to have a good fire rating than structures made of other materials. Nevertheless, concrete undergoes important chemical and physical changes, starting at 400°C - 500°C. As calcium hydroxide and other hydration products start to decompose, concrete tends to lose its strength, typically around 600°C - 700°C. In order to improve the high temperature properties of concrete, admixtures can be used in concrete. In the following, a study on the effects of different admixtures on the properties of concrete at high temperature is presented.

CENTRALLOY G4879 MICRO

Alloy Digest ◽  
2013 ◽  
Vol 62 (5) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
High Temperature Properties ◽  
Uniform Dispersion ◽  
Dislocation Movement

Abstract Centralloy G4879 Micro is a cast nickel alloy with very good high-temperature properties. The alloy has carbides in a uniform dispersion that impede dislocation movement. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on casting, machining, and joining. Filing Code: Ni-708. Producer or source: Schmidt & Clemens Inc..

High-temperature properties of liquid-phase-sintered α-SiC

2000 ◽  
Vol 282 (1-2) ◽  
pp. 109-114 ◽  
Author(s):  
Robert P. Jensen ◽  
William E. Luecke ◽  
Nitin P. Padture ◽  
Sheldon M. Wiederhorn
Keyword(s):  
High Temperature ◽  
Liquid Phase ◽  
High Temperature Properties

scholarly journals Evaluation on the Bond Capacity of the Fire-Protected FRP Bonded to Concrete Under High Temperature

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Soo-yeon Seo ◽  
Jong-wook Lim ◽  
Su-hyun Jeong
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
Temperature Variation ◽  
Fire Resistance ◽  
Fire Protection ◽  
Element Analysis ◽  
External Temperature ◽  
Near Surface ◽  
Board Type ◽  
The Face

AbstractTo figure out the change in the reinforcing effect of FRP system used for the retrofit of RC beam when it is exposed to high temperature, it is required to evaluate not only the behavior of the entire beam, but also the bond performance at anchorage zone through a bond test according to the increase of external temperature. Moreover, the study to find various fire-protection methods is necessary to prevent the epoxy from reaching the critical temperature during an exposure to high temperature. In this manner, the fire-resistance performances of externally bonded (EB) FRP and near-surface-mounted (NSM) FRP to concrete block were evaluated by high-temperature exposure tests after performing a fire-protection on the surface in this paper. Board-type insulation with mortar was considered for the fire-protection of FRP system. After the fire-protection of the FRPs bonded to concrete blocks, an increasing exposure temperature was applied to the specimens with keeping a constant shear bond stress between concrete and the FRP. Based on the result, the temperature when the bond strength of the FRP disappears was evaluated. In addition, a finite element analysis was performed to find a proper method for predicting the temperature variation of the epoxy which is fire-protected with board-type insulation during the increase of external temperature. As a result of the test, despite the same fire-protection, NSM specimens were able to resist 1.54–2.08 times higher temperature than EB specimens. In the design of fire-protection of FRP system with the board-type insulation, it is necessary to consider the transfer from sides as well as the face with FRP. If there is no insulation of FP boards on the sides, the epoxy easily reaches its critical temperature by the heat penetrated to the sides, and increasing the thickness of the FP board alone for the face with FRP does not increase the fire-resistance capacity. As a result of the FE analysis, the temperature variation at epoxy can be predicted using the analytical approach with the proper thermal properties of FP mortar and board.

Study on Properties of the Blends with Direct Coal Liquefaction Residue and Asphalt

2014 ◽  
Vol 488-489 ◽  
pp. 316-321 ◽  
Author(s):  
Jie Ji ◽  
Yong Shang Zhao ◽  
Shi Fa Xu
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Processing Method ◽  
Coal Liquefaction ◽  
Direct Influence ◽  
Processing Methods ◽  
High Temperature Properties ◽  
Additive Content ◽  
Direct Coal Liquefaction ◽  
Coal Liquefaction Residue

This paper studies the properties of the blends composed of DCLR (direct coal liquefaction residue) and asphalt using two different processing methods, compares the regulation that the DCLR additive content and processing method take influence on the high-temperature properties, low-temperature properties and durability of the blends. It is found that the DCLR can improve the high-temperature properties of asphalt but degrade its low-temperature properties. The properties of blends composed of DCLR, asphalt and furfural extract oil are tested and analyzed by adding a certain amount of furfural extract oil into it, which shows that adding DCLR can improve the high-temperature properties of asphalt and reduce its low-temperature properties but can hardly cause any impact on the properties of the blends. In addition, the processing method has a direct influence on the properties of blends.

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