Corrosion Resistance of Steel in Cracked Reinforced Concrete after Electro-depositon Treatment

2019 ◽  
Vol 34 (5) ◽  
pp. 1127-1135
Author(s):  
Hongqiang Chu ◽  
Congling Pan ◽  
Chuansheng Xiong ◽  
Sujing Zhao ◽  
Ming Jin ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete

scholarly journals Effect of Plastering Layer on Corrosion Resistances of Reinforced Concrete Beams

2019 ◽  
Vol 9 (1) ◽  
pp. 1390-1393
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Point Load ◽  
Reinforced Concrete Beams ◽  
Experimental Program ◽  
Structural Elements ◽  
Accelerated Corrosion ◽  
Total Mass Loss ◽  
Load Arrangement

Reinforced concrete structures are subjected to deterioration due to many factors such as corrosion of reinforcing steel. Ultimate strengths of structural elements can be greatly affected by these deteriorating factors. There are numerous methods and techniques used to protect these structural elements. The mortar layer (Plastering) is considered the first defense line against all the deteriorating factors. The main goal of this research is to investigate to what extent the plastering layer can protect reinforced concrete beams against corrosion. The aim of the experimental program is to study the effect of plastering layer on corrosion resistance of reinforced concrete beams. Four reinforced concrete beams (1002001100 mms) and four Lollypop specimens (cylinders 100200 mms) were tested and described as follows: • A beam and a lollypop specimen without any plastering layer (control). • A beam and a lollypop specimen with traditional plastering layer (cement + sand + water). • A beam and a lollypop specimen with modified plastering (traditional plastering + waterproof admixtures). • A beam and a lollypop specimen with painted and modified plastering layer (traditional plastering + waterproof admixtures + external waterproof paint). These eight specimens were subjected to corrosion using accelerated corrosion technique, after that the four beams were tested in flexure under three point load arrangement while the four lollypops were used to calculate the total mass loss due to accelerated corrosion. The test results were used to figure out the effect of plastering layer on corrosion resistance of RC beams.

scholarly journals Improving Sustainability through Corrosion Resistance of Reinforced Concrete by Using a Manufactured Blended Cement and Fly Ash

2018 ◽  
Vol 10 (6) ◽  
pp. 2004 ◽  
Author(s):  
Hector Campos Silva ◽  
Pedro Garces Terradillos ◽  
Emilio Zornoza ◽  
Jose Mendoza-Rangel ◽  
Pedro Castro-Borges ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete ◽  
Fly Ash ◽  
Blended Cement

Chemical Deposition of Thin Layers on Reinforcing Steel

2015 ◽  
Vol 660 ◽  
pp. 213-218 ◽  
Author(s):  
Petru Lazăr ◽  
Costică Bejinariu ◽  
Andrei Victor Sandu ◽  
Alin Marian Cazac ◽  
Ioan Gabriel Sandu
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete ◽  
Experimental Research ◽  
Immersion Time ◽  
Chemical Deposition ◽  
Thin Layers ◽  
Phosphate Solution ◽  
Reinforcing Steel ◽  
Good Surface

This paper presents the results of experimental research on the influence of using microcrystalline phosphating process on the OB37 steel used in construction. For this purpose, the samples were immersed in phosphate solution and the structures were characterized using SEM microscope. The results show that the obtained structures, are influenced by pH and immersion time and show a good surface compactity and roughness, which means that the obtained layer on the OB37 reinforcement improves corrosion resistance and adhesion of these reinforcements in the reinforced concrete.

scholarly journals Corrosion Resistance of Concrete Reinforced by Zinc Phosphate Pretreated Steel Fiber in the Presence of Chloride Ions

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3636
Author(s):  
Xingke Zhao ◽  
Runqing Liu ◽  
Wenhan Qi ◽  
Yuanquan Yang
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete ◽  
Zinc Phosphate ◽  
Steel Fiber ◽  
Chloride Ion ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Interfacial Bond Strength ◽  
Before And After

This paper aims to provide new insight into a method to improve the chloride ion corrosion resistance of steel fiber reinforced concrete. The steel fiber was pretreated by zinc phosphate before the preparation of the fiber reinforced concrete. Interfacial bond strength, micro-hardness and micro-morphology properties were respectively analyzed in the steel fiber reinforced concrete before and after the chloride corrosion cycle test. The results show that the chloride ion corrosion resistance of the steel fiber was enhanced by zinc phosphate treatment. Compared to plain steel fiber reinforced concrete under chloride ion corrosion, the interfacial bond strength of the concrete prepared by steel fiber with phosphating treatment increased by 15.4%. The thickness of the interface layer between the pretreated steel fiber and cement matrix was reduced by 50%. The micro-hardness of the weakest point in the interface area increased by 54.2%. The micro-morphology of the interface area was almost unchanged before and after the corrosion. The steel fiber reinforced concrete modified by zinc phosphate can not only maintain the stability of the microstructure when corroded by chloride ion but also presents good bearing capacity.

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