Bond behaviors between copper slag concrete and corroded steel bar after exposure to high temperature

2021 ◽  
Vol 44 ◽  
pp. 103312
Author(s):  
Wei Gong ◽  
Qi Chen ◽  
Jijun Miao
Keyword(s):  
High Temperature ◽  
Copper Slag ◽  
Steel Bar

Arsenic removal from copper slag matrix by high temperature sulfide-reduction-volatilization

2021 ◽  
Vol 415 ◽  
pp. 125642
Author(s):  
Zongwen Zhao ◽  
Zhongbing Wang ◽  
Wenbin Xu ◽  
Weining Qin ◽  
Jie Lei ◽  
...  
Keyword(s):  
High Temperature ◽  
Arsenic Removal ◽  
Copper Slag

Experimental Study on Horizontal Shear Crack Control of Prestressed Corrugated Composite Beams

2015 ◽  
Vol 784 ◽  
pp. 391-396
Author(s):  
Seung Un Chae ◽  
Bum Yean Cho ◽  
Oh Sang Kweon ◽  
Heung Youl Kim
Keyword(s):  
High Temperature ◽  
Brittle Failure ◽  
Composite Beam ◽  
Shear Crack ◽  
Reverse Direction ◽  
Horizontal Shear ◽  
Lateral Shear ◽  
Crack Control ◽  
Fire Resistance Test ◽  
Steel Bar

In case the structure is exposed to the high temperature, the lateral shear crack is the major cause exposing the steel bar to the high temperature and also the major cause of the collapse of buildings. In the study, in order to control the lateral shear crack, the presterssing using strands in a reverse direction of the lateral shear crack has applied and the fire resistance test of the PS corrugated web composite beam has been carried out, produced in a corrugated type of the steel to increase the efficiency of the prestressing. As a result of the test, the lateral shear crack introducing the PS has been reduced but it has been concluded that in case the strands are failed, the brittle failure can be taking place.

Pyrolysis of rubber seed oil over high-temperature copper slag: Gas and mechanism of coke formation

2021 ◽  
Author(s):  
Jinlong Du ◽  
Fengxia Zhang ◽  
Jianhang Hu ◽  
Shiliang Yang ◽  
Huili Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Seed Oil ◽  
Coke Formation ◽  
Copper Slag ◽  
Rubber Seed Oil ◽  
Rubber Seed

scholarly journals High Temperature Performance of a prefabricated concrete sandwich panel

2021 ◽  
Vol 233 ◽  
pp. 03028
Author(s):  
Shouqian Liu ◽  
Zhan Song
Keyword(s):  
High Temperature ◽  
Sandwich Panel ◽  
Precast Concrete ◽  
Wire Mesh ◽  
Steel Bar ◽  
Concrete Layer ◽  
Core Column ◽  
Sandwich Wall ◽  
Strength And Stiffness ◽  
Sandwich Wall Panel

The innovative sandwich wall panel studied in this paper can be used as the load-bearing member of the structure. In addition to the traditional sandwich panel structure, the new panel system also has the characteristics of spiral stirrups along the section of the core column, 650mm column spacing, foam concrete for insulation layer and self-compacting concrete for outer layer. In addition, in order to improve the overall strength and stiffness of the panel, a unique wire system consisting of two vertical wire mesh connected by a short horizontal steel bar is adopted in the concrete layer. In order to study the mechanical properties of the new panel system at high temperature, ABAQUS simulation was carried out. The simulation results show that the new precast concrete sandwich wall system has good resistance to high temperature and still has good bearing capacity after high temperature.

Research on Bearing Capacity of Prestressed Concrete T-Beam at High Temperature in Fire

2010 ◽  
Vol 160-162 ◽  
pp. 1716-1723
Author(s):  
Hui Ai ◽  
Chuan Qing Zhang ◽  
Li Zhang ◽  
Ju Tian
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Concrete Structure ◽  
Concrete Cover ◽  
Steel Bar ◽  
Specific Position ◽  
In Fire ◽  
T Beam

The bearing capacity of bridge structure would decrease under high temperature in fire, and there is a risk of structural collapse when the bearing capacity decreased to a certain degree. The estimate of bearing capacity of concrete structure at high temperature in fire will directly influence the scheme of disaster relief. Recently, there are a few researches on evaluating the bearing capacity of concrete structure at high temperature in fire, even fewer on bearing capacity of prestressed structure. Surface temperature and temperature of internal specific position of prestressed concrete T-beam are put forward in this paper by making use of ISO 834 international standard heating curve and distribution rules of temperature field of ASCE. The degradation of mechanical properties of concrete, steel bar, steel strand and other materials at high temperature are worked out according to relationships between material mechanical properties and high temperature, and on this basis, the bearing capacity of 3 prestressed concrete T-beams are calculated and evaluated at high temperature in fire. The results show that after being under 3-hour's high temperature in fire, the bearing capacity in high temperature of prestressed concrete T-beam would decreased to it’s 25% in normal; the stronger the concrete is or the thinner the concrete cover is, the greater decrease of bearing capacity of prestressed concrete T-beam would be. Based on calculations and evaluations, a statistics regression equation of bearing capacity of prestressed concrete T-beam at high temperature in fire is obtained.

Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

1973 ◽  
Vol 31 ◽  
pp. 184-185
Author(s):  
M.S. Grewal ◽  
S.A. Sastri ◽  
N.J. Grant
Keyword(s):  
High Temperature ◽  
Nickel Alloys ◽  
Thermomechanical Processing ◽  
Cold Work ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Mechanical Processing ◽  
Uniform Dispersion ◽  
Oxide Particles ◽  
Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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