### Estimation of Concrete Carbonation Depth

Hae-Chang Cho, Hyunjin Ju, Jae-Yuel Oh, Kyung Jin Lee, Kyung Won Hahm, Kang Su Kim, " Estimation of Concrete Carbonation Depth Considering Multiple Influencing Factors on the Deterioration of Durability for Reinforced Concrete Structures ", Advances in Materials Science and Engineering, vol. 2016, Article ID 4814609, 18 pages, 2016. https://doi/10.1155/2016/4814609

Get price### Research Article Estimation of Concrete Carbonation

2019-7-30 Estimation of Concrete Carbonation Depth Considering Multiple Influencing Factors on the Deterioration of Durability for Reinforced Concrete Structures Hae-ChangCho, 1 HyunjinJu, 1 Jae-YuelOh, 1 KyungJinLee, 2 KyungWonHahm, 2 andKangSuKim 1 Department of Architectural Engineering, University of Seoul,Seoulsiripdaero, Dongdaemun-gu, Seoul, Republic of Korea

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Estimation of Concrete Carbonation Depth Considering Multiple Influencing Factors on the Deterioration of Durability for Reinforced Concrete Structures Table 7 Field investigation data (Building 5, construction completion year: 1983).

Get price### Estimation of Depth of Concrete Carbonation

1997-7-1 An analytical expression for estimation of the depth of concrete carbonation is derived by considering that carbonation is controlled by dif-fusion of CO2 in concrete. The depth of concrete carbonation with time is given simply iii terms of the diffusion coefficient of CO2 iii concrete: con-centrat ion of ambient CO2, a n d concent rat ion of carbonat able CaO in the hydration products of cement iii concrete.

Get price### Estimation of Carbonation Depth Based on ... - Concrete

2011-3-1 Based on these two components, the formulation of which is presented in the paper, the results of hygrothermal calculations are used for the estimation of carbonation depth in concrete components. The accuracy of the results derived from this method is verified through their comparison with experimentally derived carbonation depth values; the latter are cited in the references.

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2020-8-31 Carbonation is a common type of concrete deterioration, which can cause various physicochemical changes that adversely affect the performance of reinforced concrete structures. The reinforced concrete structures can be considerably damaged by the reinforcement corrosion caused by the neutralization of concrete under carbonation.

Get price### An empirical model design for evaluation and

2018-8-1 To measure the carbonation depth in concrete, prism specimens were cut (about 50 mm) into slice and the phenolphthalein solution was sprayed on freshly cut surface. Measurement of carbonation depth was then made by taking the average of 5 readings taken on each face of slice.

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2018-1-1 The ratio of carbonation depth at the corner of the concrete members to the other positions is about 1.35. The carbonation depth is increased about 1.9

Get price### A new meta-model to calculate carbonation front

2016-12-30 The carbonation of cementitious materials is caused by carbon dioxide (CO2) in the air within a range of 350 up to 380 ppm (parts per million), corresponding to a volume concentration ranging between 0.00057 kg/m 3 and 0.00062 kg/m 3 [3]. CO 2 dissolves in the aqueous pore solution and produces carbonic acid (H2 CO 3).

Get price### Estimation of Carbonation Depth Based on ... - Concrete

2011-3-1 Keywords: carbonation; hygrothermal analysis; modeling. Date: 3/1/2011. Abstract: In this paper, a method for the estimation of concrete carbonation depth is presented. The basis of this method’s calculations is on the results of hygrothermal performance analysis of concrete components.

Get price### Numerical approach for concrete carbonation

2020-8-31 Carbonation is a common type of concrete deterioration, which can cause various physicochemical changes that adversely affect the performance of reinforced concrete structures. The reinforced concrete structures can be considerably damaged by the reinforcement corrosion caused by the neutralization of concrete under carbonation. This study introduces a numerical analysis approach

Get price### An empirical model design for evaluation and

Problem of studying effect of concrete compositions on carbonation depth is undertaken. • An empirical model was designed using ANS approach for evaluation of depth. • Experiments were used to validate the models and good accuracy was obtained. • Parametric analysis was performed to measure effect of inputs on carbonation depth.

Get price### A new meta-model to calculate carbonation front

2016-12-30 The reliability of the meta-model, carbonation depth predictions is validated using results measured on actual concrete structure found in the literature . Carbonation depth results of the models proposed by Papadakis et al. , , and Yang et al. , are also plotted in the same figure. Papadakis’ model tends to underestimate the carbonation ...

Get price### A model predicting carbonation depth of concrete ...

2008-7-31 Silica fume (SF) has been used since long as a mineral admixture to improve durability and produce high strength and high performance concrete. Due to the pozzolanic reaction between calcium hydroxide and silica fume, compared with ordinary Portland cement, the carbonation of concrete containing silica fume is much more complex. In this paper, based on a multi-component concept, a

Get price### Numerical Simulation on Carbonation Depth of

An experimental-numerical correlation has been performed. The ratio of carbonation depth at the corner of the concrete members to the other positions is about 1.35. The carbonation depth is increased about 1.9 times when the temperature changes from 20°C to 40°C

Get price### Numerical Simulation on Carbonation Depth of

2018-1-1 An experimental-numerical correlation has been performed. The ratio of carbonation depth at the corner of the concrete members to the other positions is about 1.35. The carbonation depth is increased about 1.9 times when the temperature changes from 20°C to 40°C. Published in Advances in Materials Science and Engineering ISSN 1687-8434 (Print)

Get price### Statistical analysis of the carbonation coefficient in ...

2012-4-1 The evolution of carbonation depth with time is shown in Fig. 9 and the corresponding reinforcement cover values are presented in Table 4. As for current strength concrete, there is also an excellent agreement between carbonation depth predictions from both models for higher strength concrete. Download : Download full-size image; Fig. 9.

Get price### Experimental verification of carbonation models used for ...

2020-10-30 to estimate the carbonation depth depending on one param-eter, e.g. concrete strength class [25], as well as considering many additional factors (w/c ratio, humidity, type of cement, curing time, exposure conditions) affecting the carbonation process [2, 25]. 2.2. Self-terminating carbonation model. Since concrete is

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Numerical Simulation on Carbonation Depth of Concrete Structures considering Time- and Temperature-Dependent Carbonation Process Jianxin Peng,1 Huang Tang,2 Jianren Zhang,3 and Steve C. S. Cai4 1School of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China 2School of Civil Engineering, Hunan City ...

Get price### Numerical approach for concrete carbonation

2020-8-31 Carbonation is a common type of concrete deterioration, which can cause various physicochemical changes that adversely affect the performance of reinforced concrete structures. The reinforced concrete structures can be considerably damaged by the reinforcement corrosion caused by the neutralization of concrete under carbonation. This study introduces a numerical analysis approach

Get price### An empirical model design for evaluation and

Carbonation is one of the major factors that reduce the durability performances of reinforced concrete (RC) structures. Carbonation contributes in lowering the pH (less than 12) of concrete which is susceptible for the steel in concrete. Lower pH value may break the protective film also known as passive film of steel and accelerate the corrosion process.

Get price### A model predicting carbonation depth of concrete ...

2008-7-31 Silica fume (SF) has been used since long as a mineral admixture to improve durability and produce high strength and high performance concrete. Due to the pozzolanic reaction between calcium hydroxide and silica fume, compared with ordinary Portland cement, the carbonation of concrete containing silica fume is much more complex. In this paper, based on a multi-component concept, a

Get price### Statistical analysis of the carbonation coefficient in ...

2012-4-1 The evolution of carbonation depth with time is shown in Fig. 9 and the corresponding reinforcement cover values are presented in Table 4. As for current strength concrete, there is also an excellent agreement between carbonation depth predictions from both models for higher strength concrete. Download : Download full-size image; Fig. 9.

Get price### Performance Based Evaluation of Carbonation

2017-12-7 Concrete Carbonation Depth and Rate Modulus. Tables 6 and 7 tabulate carbonation depth and rate modulus for wind speed (0, 2, 4, and 6 m/s) and sunlight exposure time (2, 4, 6, and 8 h), respectively. The tables showed that maximum and minimum carbonation depth of 8.9 mm and 5.2 mm, respectively, occurred under the wind speed and sunlight ...

Get price### Experimental verification of carbonation models used for ...

2020-10-30 to estimate the carbonation depth depending on one param-eter, e.g. concrete strength class [25], as well as considering many additional factors (w/c ratio, humidity, type of cement, curing time, exposure conditions) affecting the carbonation process [2, 25]. 2.2. Self-terminating carbonation model. Since concrete is

Get price### Influence of carbonation on fatigue of concrete with

2015-4-16 The effect of carbonation on fatigue performance of ground granulated blast-furnace slag concrete was investigated. Based on the static compression tests of carbonated GGBS-concrete, the correlation between carbonation depth and compressive strength was analyzed and an equation between carbonation depth and compressive strength was put forward. Meanwhile, fatigue S-N curves of

Get price### Investigation of the parameters influencing progress of ...

considering different concrete-related parameters individually and predicting the extent (i.e. the depth) of carbonation in concrete that could be exposed to varying environmental conditions within a specified exposure period is required. Such a model would provide extended understanding of carbonation

Get price### Probability

Appl. Sci. 2020, 10, 4330 2 of 14 needs to be developed. Recently, several researchers have employed field inspection data to effectively predict concrete carbonation. Han et al. have studied the carbonation progress with respect to concrete strength and concrete cover depth [11]. They analyzed 436 data sets from 80 harbor facilities and compared them with existing prediction models.

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