Adoption of reinforcement bar rolling on merchant mill 250

Metallurgist ◽  
1977 ◽  
Vol 21 (8) ◽  
pp. 528-529
Author(s):  
V. K. Grigor'ev ◽  
V. F. Antipov ◽  
B. S. Rezvov ◽  
Yu. M. Kuznetsov ◽  
V. A. Borovinskii ◽  
...  
Keyword(s):  
Bar Rolling ◽  
Reinforcement Bar ◽  
Merchant Mill

Using of FEM to Analyse of the Reinforcement Bar Rolling Process

2007 ◽  
Vol 539-543 ◽  
pp. 2536-2541
Author(s):  
Piotr Szota ◽  
Henryk Dyja
Keyword(s):  
Computer Simulation ◽  
Reinforced Concrete ◽  
Metal Flow ◽  
Rolling Process ◽  
Building Industry ◽  
Bar Rolling ◽  
Reinforcement Bar ◽  
Bridge Building ◽  
Roll Gap

Reinforcement bars are chiefly used in the building industry at production of reinforced concrete constructions and as working elements in bridge building. An important factor for strength joining bar and concrete are dimensions and positioning of ribs at the bar’s surface. In this paper the computer simulation of the rolling of the round reinforcement bar is presented. It has been performed in order to define the specific features of the mode of metal flow in the roll gap and to determine the effect of the shape and dimensions of the roll on the pitch of the ribs of the finished bar.

Development of Combined Machining Modes, Investigation of Mechanical Properties and Structure of Deformed Semi-Finished Products from Alloy 01417

2020 ◽  
Vol 992 ◽  
pp. 498-503
Author(s):  
S. Sidelnikov ◽  
D. Voroshilov ◽  
M. Motkov ◽  
M. Voroshilova ◽  
V. Bespalov
Keyword(s):  
Mechanical Properties ◽  
Rare Earth Metals ◽  
Electrophysical Properties ◽  
Intermediate Annealing ◽  
Plastic Properties ◽  
Bar Rolling ◽  
Annealing Temperatures ◽  
Continuous Ingot ◽  
The Wire ◽  
Deformation Modes

The article presents the results of studies on the production of wire with a diameter of 0.5 mm from aluminum alloy 01417 with a content of rare-earth metals (REM) in the amount of 7-9% for aircraft construction needs. The deformation modes, the experimental technique and equipment for the implementation of the proposed technology described. The wire was obtained by drawing and bar rolling with subsequent drawing from a rod with a diameter of 5 mm, obtained previously using the process of combined rolling-extruding (CRE) from a continuous ingot with a diameter of 12 mm, cast in an electromagnetic mold (EMM). The wire obtained by the presented technology was subjected to 4 different heat treatment modes with annealing temperatures from 350 to 500 °C and holding time of 1 h in the furnace to achieve mechanical and electrophysical properties corresponding to TS 1-809-1038-2018. The level of strength and plastic properties obtained in the course of research required only one intermediate annealing. The microstructure of the wire was investigated and the modes were revealed that made it possible to obtain the required level of mechanical properties and electrical resistivity, satisfying TS 1-809-1038-2018.

scholarly journals Experimental Assessment of Rebar Corrosion in Concrete Slab Using Ground Penetrating Radar (GPR)

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Ahmad Zaki ◽  
Megat Azmi Megat Johari ◽  
Wan Muhd Aminuddin Wan Hussin ◽  
Yessi Jusman
Keyword(s):  
Ground Penetrating Radar ◽  
Structural Damage ◽  
Concrete Slab ◽  
Steel Corrosion ◽  
Steel Reinforcement ◽  
Reinforcement Corrosion ◽  
Dc Power ◽  
Reinforcement Bar ◽  
Ground Penetrating ◽  
Corrosion Of Steel

Corrosion of steel reinforcement is a major cause of structural damage that requires repair or replacement. Early detection of steel corrosion can limit the extent of necessary repairs or replacements and costs associated with the rehabilitation works. The ground penetrating radar (GPR) method has been found to be a useful method for evaluating reinforcement corrosion in existing concrete structures. In this paper, GPR was utilized to assess corrosion of steel reinforcement in a concrete slab. A technique for accelerating reinforcement bar corrosion using direct current (DC) power supply with 5% sodium chloride (NaCl) solution was used to induce corrosion to embedded reinforcement bars (rebars) in this concrete slab. A 2 GHz GPR was used to assess the corrosion of the rebars. The analysis of the results of the GPR data obtained shows that corrosion of the rebars could be effectively localized and assessed.

The Influence of the Interstand Tension of the Band on Roll Wear during the Continuous Groove-Rolling Process

2015 ◽  
Vol 220-221 ◽  
pp. 898-904 ◽  
Author(s):  
Piotr Szota ◽  
Sebastian Mróz ◽  
Andrzej Stefanik ◽  
Henryk Dyja
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Quantitative Evaluation ◽  
Theoretical Study ◽  
Rolling Process ◽  
Wear Model ◽  
Bar Rolling ◽  
Groove Rolling ◽  
Roll Wear ◽  
Round Bar

Numerical modelling of the round bar rolling process, while considering the wear of passes depending on their shape, was carried out within the present work. The analysis of the rolling process was conducted thus analysing the influence of interstand tension on roll wear. For the theoretical study of the rolling process, Forge2011® was employed, which is finite element method-relying software that enables the thermo-mechanical simulation of rolling processes in a triaxial state of strain. The wear model implemented in Forge2011® permits no quantitative evaluation, but only a comparative analysis of the wear of rolls. In order to use the results of simulation employing the simplified Archard model for the quantitative evaluation of roll wear, it is necessary to define the factor of wear and the hardness of the tool as a function of temperature.

scholarly journals Groove Design and Microstructure Research of Ultra-Fine Grain Bar Rolling

2012 ◽  
Vol 02 (04) ◽  
pp. 67-75 ◽  
Author(s):  
Xuetong Li ◽  
Lei Cao ◽  
Minting Wang ◽  
Fengshan Du
Keyword(s):  
Bar Rolling ◽  
Groove Design ◽  
Fine Grain

Comparative Evaluation of Crack Width for Reinforced Concrete Bridge Deck

2021 ◽  
Vol 9 (10) ◽  
pp. 59-67
Author(s):  
Shivank Tamrakar
Keyword(s):  
Reinforced Concrete ◽  
Crack Width ◽  
Bridge Deck ◽  
Constant Width ◽  
Bridge Decks ◽  
Concrete Bridge ◽  
Live Load ◽  
Reinforced Concrete Bridge ◽  
Concrete Bridge Decks ◽  
Reinforcement Bar

Abstract: Cracking in reinforced concrete bridge decks is a massively concern in the India. Many concrete bridge decks, inobservant to the age of construction, have shown different levels and patterns of cracking. Not only does cracking of bridge decks weaken the bridge infrastructure, but also allows the inflow of corrosive agents into the reinforcement. In this study, the crack width evaluation of RC bridge deck of span of 5 m. and 9 m. is based on equations given by IRS Concrete Bridge Code 1997 for different cases like- the effect of depth variation, reinforcement diameter, clear cover, variation in live load moment, spacing of tension reinforcement and different no. of tension reinforcement bar to constant width for the same crosssection. This study concluded that crack width increases with increase in clear cover, variation in live load moment and spacing of tension reinforcement while it decreases with increase in reinforcement diameter, depth of the bridge deck and number of reinforced bars and percentage change evaluation of different parameter of 5m and 9m span bridge deck. Keyword: Crack Width, Cracking, Bridge Deck Slab, Crack Spacing.

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