scholarly journals Probabilistic Analysis of Reinforced Concrete Carbonation Depth

2013 ◽  
Vol 04 (03) ◽  
pp. 205-215
Author(s):  
Azhar Badaoui ◽  
M’hammed Badaoui ◽  
Fattoum Kharchi
Keyword(s):  
Reinforced Concrete ◽  
Probabilistic Analysis ◽  
Carbonation Depth ◽  
Concrete Carbonation

Steel Fiber Reinforced Concrete Carbonation Simulation Research

2011 ◽  
Vol 243-249 ◽  
pp. 108-111 ◽  
Author(s):  
Yuan Yao Miao ◽  
Di Tao Niu ◽  
Yan Wang
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Reinforced Concrete Structure ◽  
Steel Fiber Reinforced Concrete ◽  
Carbonation Depth ◽  
Simulation Research ◽  
Concrete Carbonation

Durability of concrete structure due to carbonation problem has attracted worldwide attention. By studying on the performance of steel fiber reinforced concrete carbonation, simulations CO2corrosion environment was simulated. The impacts of the change law of carbonation depth of steel fiber reinforced concrete with water cement ratio (0.35,0.45,0.55), as well as steel fiber content (0%, 0.5%, 1.0%, 1.5% , 2.0%), pouring surface and age, on concrete carbonation depth were studied. Steel fiber reinforced concrete carbonation performance improvement role was analyzed. Thus, providing a experimental basis that can be used in the design and analysis of the durability of steel fiber reinforced concrete structure.

scholarly journals Estimation of Concrete Carbonation Depth Considering Multiple Influencing Factors on the Deterioration of Durability for Reinforced Concrete Structures

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
Hae-Chang Cho ◽  
Hyunjin Ju ◽  
Jae-Yuel Oh ◽  
Kyung Jin Lee ◽  
Kyung Won Hahm ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Concrete Member ◽  
Carbonation Depth ◽  
Inference System ◽  
Concrete Carbonation ◽  
Reinforced Concrete Member ◽  
Inspection Data ◽  
Adaptive Neurofuzzy Inference System

While the durability of concrete structures is greatly influenced by many factors, previous studies typically considered only a single durability deterioration factor. In addition, these studies mostly conducted their experiments inside the laboratory, and it is extremely hard to find any case in which data were obtained from field inspection. Accordingly, this study proposed an Adaptive Neurofuzzy Inference System (ANFIS) algorithm that can estimate the carbonation depth of a reinforced concrete member, in which combined deterioration has been reflected based on the data obtained from field inspections of 9 buildings. The proposed ANFIS algorithm closely estimated the carbonation depths, and it is considered that, with further inspection data, a higher accuracy would be achieved. Thus, it is expected to be used very effectively for durability estimation of a building of which the inspection is performed periodically.

Effect of the Randomness of the Relative Humidity on the Phenomenon of Carbonation of the Reinforced Concrete

2011 ◽  
Vol 340 ◽  
pp. 181-183 ◽  
Author(s):  
A. Badaoui ◽  
M. Badaoui ◽  
F. Kharchi
Keyword(s):  
Monte Carlo ◽  
Reinforced Concrete ◽  
Relative Humidity ◽  
Probability Distribution ◽  
Monte Carlo Simulations ◽  
Probabilistic Analysis ◽  
Random Variables ◽  
Carbonation Depth ◽  
Lognormal Probability

This paper deals with shows the randomness effect of the relative humidity on the carbonation phenomenon of the reinforced concrete. This analysis concentrates on the evaluation of carbonation depth (Xc) of the reinforced concrete from a probabilistic analysis. Monte Carlo simulations are realized under the assumption that the relative humidity at the surface of the concrete is random variables with a lognormal probability distribution.

Probabilistic Analysis of Fiber-Reinforced Concrete

1974 ◽  
Vol 100 (2) ◽  
pp. 397-413
Author(s):  
Antoine E. Naaman ◽  
Fred Moavenzadeh ◽  
Frederick J. McGarry
Keyword(s):  
Reinforced Concrete ◽  
Probabilistic Analysis ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced

scholarly journals Effects of Environmental Factors on Concrete Carbonation Depth and Compressive Strength

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2167 ◽  
Author(s):  
Ying Chen ◽  
Peng Liu ◽  
Zhiwu Yu
Keyword(s):  
Compressive Strength ◽  
Phase Composition ◽  
Relative Humidity ◽  
Co2 Concentration ◽  
Crystal Structure Analysis ◽  
Hydration Products ◽  
Carbonation Depth ◽  
Concrete Carbonation ◽  
Before And After ◽  
Compressive Strength Of Concrete

The influence of temperature, CO2 concentration and relative humidity on the carbonation depth and compressive strength of concrete was investigated. Meanwhile, phase composition, types of hydration products and microstructure characteristics of samples before and after the carbonation were analyzed by XRD and ESEM. Research results demonstrate that temperature, CO2 concentration and relative humidity influence the carbonation depth and compressive strength of concrete significantly. There is a linear relationship between temperature and carbonation depth, as well as the compressive strength of concrete. CO2 concentration and relative humidity present a power function and a polynomial function with carbonation depth of concrete, respectively. The concrete carbonation depth increases with the increase of relative humidity and reaches the maximum value when the relative humidity is 70%. Significant differences of phase composition, hydration products and microstructure are observed before and after the carbonation. Carbonization products of samples are different with changes of temperatures (10 °C, 20 °C and 30 °C). The result of crystal structure analysis indicates that the carbonation products are mainly polyhedral spherical vaterite and aragonite.

Study on the Influence of Freeze-Thaw on the Carbonation Property of Fly Ash Concrete

2013 ◽  
Vol 357-360 ◽  
pp. 939-943 ◽  
Author(s):  
Jian Gang Niu ◽  
Liang Yan ◽  
Hai Tao Zhai
Keyword(s):  
Fly Ash ◽  
Laboratory Simulation ◽  
Influence Coefficient ◽  
Carbonation Depth ◽  
Freeze Thaw ◽  
Fly Ash Concrete ◽  
Concrete Carbonation ◽  
Thaw Cycle ◽  
Freeze Thaw Cycle

Based on the coupling testing program of freeze-thaw and carbonation, the laboratory simulation test is carried out. The laws of carbonation depth of the fly ash concrete suffered the freeze-thaw cycle in different test modes and the influence of fly ash dosage on concrete carbonation depth after the freeze-thaw cycle are studied. Defining the influence coefficient of the freeze-thaw cycles on carbonation depth of concrete, the mechanism of coupling of freeze-thaw and carbonation is analyzed,and the role of freeze-thaw and carbonation in the coupling process are obtained.

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