IMPROVING REINFORCED CONCRETE DURABILITY IN THE MIDDLE EAST DURING THE PERIOD 1960-1985: AN ANALYTICAL REVIEW.

1989 ◽  
Vol 86 (2) ◽  
pp. 333-358 ◽  
Author(s):  
JD SIMM ◽  
PG FOOKES
Keyword(s):  
Reinforced Concrete ◽  
Middle East ◽  
Concrete Durability ◽  
Analytical Review

The Reinforced Concrete Durability and Rebar Erosion Monitoring

2012 ◽  
Vol 446-449 ◽  
pp. 3252-3258
Author(s):  
Jin Yang Zhang ◽  
De Mi Cui ◽  
Lie Min Lv ◽  
Zhi Yang
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Protective Layer ◽  
Concrete Surface ◽  
Monitor System ◽  
Concrete Durability ◽  
Information Feedback ◽  
Starting Time ◽  
Cast Concrete

On the basis of the advantages of low construction cost, remarkable dynamics property, easy cast moulding and more controllable construction, the reinforced concrete construct are widely applied in buildings and main structures of constructions in China. However, the reinforced concrete is found more or less aging after many years’ utilization and erosion from the environment, which will lead to a hidden risk to affect its functions. After technical development for decades, the concrete can assure its durability under normal situation, yet the function would be deteriorated due to the erosion from the complex and harsh environment to make it hardly reach its designed service life. With the assist of CorroWatch erosion monitor system, the concrete structures’ erosion can kept watched on to obtain the depassivation development and information feedback of some key data dynamically and in long term so as to foresee precisely the erosion starting time. The newly cast concrete depassivation frontline is located on concrete surface and will tend to go through the protective layer and penetrate towards rebar as time goes on. Its structure service life can be enhanced with the re-designed durability in terms of the mentioned characters and do well the erosion proof measures.

Reinforced Concrete Durability in Marine Environments DURACON Project: Long-Term Exposure

CORROSION ◽  
10.5006/1893 ◽  
2016 ◽  
Vol 72 (6) ◽  
pp. 824-833 ◽  
Author(s):  
O. Troconis de Rincón ◽  
J.C. Montenegro ◽  
R. Vera ◽  
A.M. Carvajal ◽  
R.M. de Gutiérrez ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Durability ◽  
Marine Environments

Prediction of durability of structural concrete in aggressive exposures

2018 ◽  
Author(s):  
Сергей Леонович ◽  
Sergey Leonovich ◽  
Валентин Доркин ◽  
Valentin Dorkin ◽  
Оксана Чернякевич ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Service Life ◽  
Building Materials ◽  
Limit State ◽  
Concrete Structures ◽  
Life Cycles ◽  
Reinforced Concrete Structures ◽  
Concrete Durability ◽  
Concrete Carbonation ◽  
Corrosion Of Steel

The monograph is devoted to the prediction of the longevity of reinforced concrete structures, the destruction of which is associated with corrosion of steel reinforcement caused by chloride aggression or concrete carbonation. On the basis of a comprehensive analysis of models for calculating the service life of structures and experimental data, preference is given to the mathematical model Dura Crete. Life cycles for the main degradation processes in concrete and reinforcement, periods of initiation and propagation of corrosion are considered. Particular attention is paid to the influence of environmental factors and the quality of concrete on the kinetics of chloride penetration and movement of the carbonization front. Formulated limit state design reinforced concrete durability in chloride attacks and carbonation. The basic provisions of the method of calculating the durability of reinforced concrete structures, based on the use of the reliability coefficient for the service life. The practical assessment of service life of reinforced concrete elements taking into account stochastic processes in concrete and reinforcement is made. Verification of the model reliability is performed. For all those interested in the issues of building materials and processes occurring in them.

Toward a probabilistic design of reinforced concrete durability: application to a marine environment

2008 ◽  
Vol 42 (10) ◽  
pp. 1379-1391 ◽  
Author(s):  
Fabrice Deby ◽  
Myriam Carcasses ◽  
Alain Sellier
Keyword(s):  
Reinforced Concrete ◽  
Marine Environment ◽  
Concrete Durability ◽  
Probabilistic Design

The Study of Fuzzy Reliability of Concrete Durability after Corrosion of Steel-Bars

2011 ◽  
Vol 291-294 ◽  
pp. 2159-2163
Author(s):  
Yang Hang Shi ◽  
Lu Zhang ◽  
De Hai Yu
Keyword(s):  
Reinforced Concrete ◽  
Influencing Factors ◽  
Mathematic Model ◽  
Engineering Practice ◽  
Concrete Durability ◽  
Actual Situation ◽  
Fuzzy Probability ◽  
Fuzzy Reliability ◽  
Steel Bars ◽  
Corrosion Of Steel

Based on the mechanism, influencing factors and their fuzziness of reinforced concrete (RC) cracking caused by corrosion of steel bars, fuzzy reliability of RC durability failure due to corrosion expansion of steel bars is analyzed adopting the mathematic model of fuzzy probability. The method having the advantages of explicit concept, convenient calculation and stable results which is proved by the examples accords with the actual situation and can be applied to the engineering practice.

Corrosion Initiation Projection for Reinforced Concrete Exposed to Chlorides: Part 1—Black Bars

CORROSION ◽  
2011 ◽  
Vol 67 (8) ◽  
pp. 086002-1-086002-10 ◽  
Author(s):  
W.H. Hartt
Keyword(s):  
Reinforced Concrete ◽  
Effective Diffusion ◽  
Concrete Cover ◽  
Distribution Functions ◽  
Cumulative Distribution ◽  
Concrete Durability ◽  
Discrete Parameter ◽  
Ct Data ◽  
Concentration Threshold ◽  
Active Corrosion

Abstract A protocol is described whereby time-to-corrosion, Ti, of reinforcing steel in concrete exposed to chlorides is calculated as a distributed, rather than a discrete, parameter. The method consists of inputting distribution functions for surface Cl− concentration (Cs), the effective diffusion coefficient (D), concrete cover over the reinforcement (x), and the critical Cl− concentration threshold to initiate active corrosion (CT) into a governing, first-principles equation from which the fraction of identically exposed, electrochemically independent elements that has initiated corrosion is calculated at a specific time. By doing this for multiple times, a cumulative distribution function (CDF) plot of Ti is developed. Example analyses were performed based upon either literature or assumed distributed Cs, D, x, and CT data. The results indicate that reinforced concrete durability should be characterized not simply in terms of the time at which reinforcement corrosion occurs initially, as is normally the case, but also by the rate at which active corrosion subsequently commences for the remaining passive elements. Further, an important but often overlooked aspect of how Cs is determined or chosen for diffusion analyses in concrete is emphasized. Advantageous attributes of this methodology in which influential variables are distributed are discussed and comparisons made to the more traditional discrete parameter approach.

Effect of the marine environment on reinforced concrete durability in Iberoamerican countries: DURACON project/CYTED

2007 ◽  
Vol 49 (7) ◽  
pp. 2832-2843 ◽  
Author(s):  
O. Trocónis de Rincón ◽  
M. Sánchez ◽  
V. Millano ◽  
R. Fernández ◽  
E.A. de Partidas ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Marine Environment ◽  
Concrete Durability
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