Progress of the Durability of Concrete Structure of the Subway

2011 ◽  
Vol 250-253 ◽  
pp. 1456-1459 ◽  
Author(s):  
Min Qin Wu
Keyword(s):  
Concrete Structure ◽  
Concrete Structures ◽  
Chloride Ion ◽  
Stray Current ◽  
Environmental Characteristics ◽  
Durability Of Concrete ◽  
At Home

More problem about the corrosion of concrete structures in subway engineering at home and abroad has been reported, people have analyzed that many factors have caused the corrosion of its concrete structure according to environmental characteristics and the location, such as the stray current and chloride ion and so on.we have reviewed the current research of the corrosion of concrete structures in subway engineering concerned on stray current and chloride ion, pointing out the direction of the study of corrosion of concrete structures in subway engineering.

Research on Factors Affecting Durability and Improvements for FRP Reinforced Concrete Structures

2011 ◽  
Vol 189-193 ◽  
pp. 847-852 ◽  
Author(s):  
Lei Tan ◽  
Xi Jun Liu ◽  
Ming Qiao Zhu
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Civil Engineering ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Reinforced Concrete Structure ◽  
Factors Affecting ◽  
Related Research ◽  
Durability Of Concrete ◽  
At Home

With wide applications of FRP in civil engineering, it is necessary to study the durability of FRP reinforced concrete structure. Based on the related research both at home and abroad, the factors affecting durability of FRP reinforced concrete structures and the corresponding improvements have been put forward by analyzing the durability of concrete, FRP materials and reinforced structures, respectively.

Durability of Concrete Structure Research and Development Direction

2010 ◽  
Vol 44-47 ◽  
pp. 2346-2353
Author(s):  
Lei Jiang ◽  
Ji Tao Yao ◽  
Ren Xin ◽  
Wei Li
Keyword(s):  
Research And Development ◽  
Concrete Structure ◽  
International Research ◽  
Concrete Structures ◽  
Future Research ◽  
Development Direction ◽  
The World ◽  
Four Levels ◽  
Structure Research ◽  
Durability Of Concrete

Currently, durability of concrete structures is a hot area of civil engineering. This paper reviews the background to the study of concrete and the current international research developments. Recent accomplishments in the world are summarized on four levels—environment, materials, components, structure. Finally, directions of future research are also proposed.

Durability in Cold Area of Prefabricated Concrete Structures

2014 ◽  
Vol 638-640 ◽  
pp. 1317-1321
Author(s):  
Ya Bo Wang ◽  
Lei Qian ◽  
Gao Feng Dou ◽  
Chuan Hao Xi ◽  
Han Ting Liu
Keyword(s):  
Failure Mechanism ◽  
Influencing Factors ◽  
Concrete Structure ◽  
Concrete Structures ◽  
Cold Regions ◽  
Factors Affecting ◽  
Cold Area ◽  
Durability Of Concrete

The factors affecting durability of concrete structures is described in This paper .It is pointed out here that is the concept of durability in prefabricated concrete structure , the influencing factors and failure mechanism in cold regions. It is proposed which are the methods and corresponding measures to enhance the durability of concrete structures.

A study of a real-time online monitoring system for the durability of concrete structures

2016 ◽  
Vol 63 (3) ◽  
pp. 184-189
Author(s):  
Mingming Xiao ◽  
Shilong Zhang ◽  
Yanbing Tang ◽  
Zhongmao Lin ◽  
Jiahong Chen
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Concrete Structures ◽  
Chloride Ion ◽  
Corrosion Current ◽  
Ion Concentration ◽  
Corrosion Monitoring ◽  
Content Type ◽  
System Data ◽  
Durability Of Concrete

Purpose This study aims to explore the effect of corrosion monitoring technology for ensuring concrete structure safety. Design/methodology/approach A new monitoring system scheme with unattended operation to evaluate the durability of concrete structures is presented, which includes four components, namely, a multi-function embedded sensor, a microprocessor data collecting module, a system data analysis and storage module, and a remote server module. Findings The system carries out monitoring of chloride ion concentration and pH in concrete, corrosion current density and of the self-corrosion potential of the reinforcing steel bar. Originality/value This system provides real-time, online, lossless monitoring for concrete structures.

The Durability and Damage Testing of High Performance Concrete

2013 ◽  
Vol 591 ◽  
pp. 325-328
Author(s):  
Wei Hong Li ◽  
Ying Ying Xu
Keyword(s):  
Concrete Structure ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Construction Engineering ◽  
Engineering Structure ◽  
Main Research ◽  
Testing Technology ◽  
Concrete Damage ◽  
Durability Of Concrete

Concrete structures are widely used in engineering structure, but because of the problem of environment and material, the durability of the concrete structure appears. This paper first states the main research content of the durability of concrete structures, then introduces the main ways to improve the durability of concrete structure. Finally it summarizes several kinds of concrete damage testing technology and characteristics, and the construction engineering testing technology is prospected.

Study and Application of Permeability Formwork to Marine Concrete

2013 ◽  
Vol 438-439 ◽  
pp. 333-337
Author(s):  
Qi Feng ◽  
Xiao Guang Wu ◽  
Ben Dong Zhao
Keyword(s):  
Concrete Structure ◽  
Concrete Structures ◽  
Working Life ◽  
Construction Process ◽  
Marine Structures ◽  
Working Mechanism ◽  
Development History ◽  
Research Status ◽  
Marine Concrete ◽  
Durability Of Concrete

During the construction of concrete structure, laying controlled permeability formwork within the traditional formwork can effectively improve the durability of concrete for marine structures and prolong the working life of concrete structures. This paper discusses the working mechanism of controlled permeability formwork, introduces its development history and research status, summarizes the construction process and matters needing attention of controlled permeability formwork, and puts forward the problems remaining to be solved at present.

Research on Corrosion Characteristics of Stainless Steel Bar in Stray Current and Chloride Ion Coexisted Environment

2011 ◽  
Vol 261-263 ◽  
pp. 56-60 ◽  
Author(s):  
Gang Xu ◽  
Hong Fang Fei ◽  
Yi Min Wang ◽  
Qing Wang
Keyword(s):  
Stainless Steel ◽  
Concrete Structure ◽  
Chloride Ion ◽  
Test Results ◽  
Constant Voltage ◽  
Stray Current ◽  
Steel Bar ◽  
The Common ◽  
Short Time ◽  
Corrosion Feature

Based on the method of electricity migration, the characteristics of the stainless steel in concrete structure are researched on in stray current and chlorate coupling environment. Test results show that stray current could make the stainless steel in concrete structure corrosion in a short time; The corrosion feature of stainless steel is different from the common steel obviously on the surface, which shows uniform pitting corrosion mainly; In static current and constant voltage conditions, the corrosion time of concrete sample with stainless steel to crack is shorter than that with common steel; In static current and constant voltage conditions, the theoretical corrosion amount is well related to the actual one, but is higher than the measured value clearly.

scholarly journals Investigation of Corrosion Rate and Rust Expansion Form of Segment Reinforcement for Shield Tunnel by Combined Action of Soil Loading, Chloride Ion and Stray Current

2021 ◽  
Vol 13 (6) ◽  
pp. 3444
Author(s):  
Zheng Li ◽  
Hao Jin ◽  
Shuo Yu
Keyword(s):  
Corrosion Rate ◽  
Steel Corrosion ◽  
Chloride Ion ◽  
Shield Tunnel ◽  
Uniform Corrosion ◽  
Stray Current ◽  
Soil Loading ◽  
Capacity Degradation ◽  
Expansion Form ◽  
Combined Action

Segment reinforcement corrosion can cause bearing-capacity degradation of shield tunnel, which is unsafe for the metro operation. Therefore, a three-dimensional computational model was proposed in this paper to study the corrosion rate and rust expansion form of segment reinforcement by the combined action of soil loading, chloride ion and stray current. The results show that the arch waist segment steel corrosion rate in the middle is larger than the ends. The rust expansion form of segment reinforcement appears be an eccentric circle. The radius size and circular center are related to the non-uniform corrosion coefficient and the maximum corrosion current density.

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