Analysis of Carbonation Behavior of Cracked Concrete

Guo, Qun; Jiang, Lexin; Wang, Jianmin; Liu, Junzhe

doi:10.3390/ma15134518

Cited by 6 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the carbonation depth perpendicular to the crack surface was smaller than the carbonation depth from the exposed surface. These results are consistent with the results from [ 37 ]. The average carbonation depths of the uncracked specimens and the locations of the cracks are given in Figure 5 .…”

Section: Experimental Studiessupporting

confidence: 94%

“…Many experimental studies report carbonation depths in cracked concrete [ 10 , 12 , 13 , 14 , 15 , 16 , 17 , 19 , 35 , 36 , 37 ]. Studies with missing information regarding crack properties or mix design [ 15 , 17 , 19 , 35 , 36 ] and studies with specialized mix designs such as [ 12 , 16 ] were excluded from the dataset.…”

Section: Experimental Studiesmentioning

confidence: 99%

“…Studies with missing information regarding crack properties or mix design [ 15 , 17 , 19 , 35 , 36 ] and studies with specialized mix designs such as [ 12 , 16 ] were excluded from the dataset. The carbonation depths at the location of the cracks were collected from [ 10 , 13 , 14 , 37 ], which includes studies on both natural cracks and artificial cracks created as notches. A summary of this literature data is given in Table 1 .…”

Section: Experimental Studiesmentioning

confidence: 99%

“…The cracks were created as notches similar to that used in other studies [ 10 , 14 , 37 ]. Thin steel sheets were placed in the fresh mortar and removed after 4 h to create notches.…”

Section: Experimental Studiesmentioning

confidence: 99%

“…Fly ash mixes are indicated with a white face color.

from own experiments and [ 10 , 13 , 14 , 37 ]. Note: Perfect predictions were gained for all

used to calculate

.…”

Section: Figurementioning

confidence: 99%

See 4 more Smart Citations

Comparative Analysis of Engineering Carbonation Model Extensions to Account for Pre-Existing Cracks

Schultheiß,

Patel,

Vogel

et al. 2023

Materials

View full text Add to dashboard Cite

Cracks in reinforced concrete structures can accelerate the local depassivation of reinforcement due to carbonation. Different approaches have been proposed to account for pre-existing cracks within engineering models to predict the carbonation depth. In this study, we provide a detailed comparative analysis of different extensions available for the fib carbonation model to account for cracks, viz., crack influence factor (CIF) approaches, a diffusion-based model and the crack depth adaption. The model extensions are first validated against a dataset of lab data collected from the literature and additional experiments performed as the part of this study. The CIF approaches achieved the highest accuracy for the carbonation depth prediction when compared against lab data. The diffusion-based model was inaccurate for low CO2 concentrations. The crack depth adaption provides overly conservative results. No model was found to be best performing, and large scatter was observed between predicted and experimental values. This emphasizes the need for more detailed multi-physics-based models to achieve accurate predictions. For further comparison, service life predictions were conducted for two structural scales, viz., the whole structure and the cracked area. It is concluded that the choice of model extension and the structural scale of analysis have a large influence on predicted probability of failure.

show abstract

Section: Experimental Studiessupporting

confidence: 94%

Section: Experimental Studiesmentioning

confidence: 99%

Section: Experimental Studiesmentioning

confidence: 99%

“…The cracks were created as notches similar to that used in other studies [ 10 , 14 , 37 ]. Thin steel sheets were placed in the fresh mortar and removed after 4 h to create notches.…”

Section: Experimental Studiesmentioning

confidence: 99%

“…Fly ash mixes are indicated with a white face color.

from own experiments and [ 10 , 13 , 14 , 37 ]. Note: Perfect predictions were gained for all

used to calculate

.…”

Section: Figurementioning

confidence: 99%

See 3 more Smart Citations

Comparative Analysis of Engineering Carbonation Model Extensions to Account for Pre-Existing Cracks

Schultheiß,

Patel,

Vogel

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

Possible Utilization of Used Precast Building Elements Through Consideration of Concrete Carbonation Degree

Radonjanin,

Malešev,

Lukić

et al. 2024

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Significant changes in the strategic goals of the construction sector at the global level have been visible in recent years. By implementing the fundamental principles of sustainable development and circular economy, the modern construction industry tries to contribute to a healthier environment by reducing CO2 emissions, minimizing waste landfills, and preserving non-renewable natural resources. The possibilities of reusing prefabricated concrete elements of existing buildings instead of their traditional recycling on a material level or disposing of them in landfills are analyzed in this paper. Special attention in the research was placed on the carbonation of prefabricated reinforced concrete elements of buildings, as it is one of the most frequent processes that accelerate the deterioration of RC structures. Long-term carbonation processes inevitably result in reinforcement corrosion and accompanying damage to the concrete cover, therefore some constrains for the further use of prefabricated RC building elements must be precisely defined. In this study, the potential use of prefab RC building elements was determined by calculating the depth of carbonation while taking into account the age of buildings and environmental conditions (relative air humidity, position of prefab element). Depending on the thickness of the carbonized concrete and the type and intensity of damage to the reinforcement and concrete, various variants for further use of the dismantled prefabricated RC building elements were proposed (reuse without restrictions, use in the interior of new buildings, use in less demanding facilities, reuse after application of a protective coating, replacement of the protective cover and reuse etc.).

show abstract

Neutralization evolution of concrete under acid rain and carbonation erosion: a review

Guo

et al. 2023

Journal of Materials Research and Technology

View full text Add to dashboard Cite

Analysis of Carbonation Behavior of Cracked Concrete

Cited by 6 publications

References 28 publications

Comparative Analysis of Engineering Carbonation Model Extensions to Account for Pre-Existing Cracks

Comparative Analysis of Engineering Carbonation Model Extensions to Account for Pre-Existing Cracks

Possible Utilization of Used Precast Building Elements Through Consideration of Concrete Carbonation Degree

Neutralization evolution of concrete under acid rain and carbonation erosion: a review

Contact Info

Product

Resources

About