Influence of axial loading and carbonation age on the carbonation resistance of recycled aggregate concrete

Tang, Jinzhi; Wu, Jin; Zou, Zhenghao; Anyi, Yue; Mueller, Andrea

doi:10.1016/j.conbuildmat.2018.03.269

Cited by 33 publications

(18 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several studies [24,25,31,38] found that the Figure 7 presents the carbonation depth of architectural concrete at different exposure times. It can be seen that carbonation depth increases with the carbonation time, which has also been found by numerous studies [29][30][31]. After carbonation for 56 days, the carbonation depth of C40, C50, and C55 are 4.36 mm, 3.83 mm, 2.97 mm, separately, which means that, on the one hand, the carbonation degree decreases with the increase of strength grade, since pore structure of C55 is denser than that of C40 and C50 (see Figure 5).…”

Section: Basic Propertiessupporting

confidence: 83%

“…The accelerated carbonation method has been widely used in many studies [24][25][26][27][28] in view of its efficiency. Besides, this method is also quite feasible as has been demonstrated by reported investigations [24,25,[29][30][31]. Moreover, the accelerated carbonation method has been written in a test standard [23] in China, which also illustrates the feasibility of this method.…”

Section: Carbonationmentioning

confidence: 82%

See 1 more Smart Citation

Durability and Aesthetics of Architectural Concrete under Chloride Attack or Carbonation

et al. 2020

View full text Add to dashboard Cite

Architectural concrete has been wildly used nowadays, and those served in an offshore environment often suffer from chloride penetration and carbonation. To assess the protection and decoration performances of architectural concrete, this study exposed architectural concrete to actual marine environments and accelerated carbonation conditions. The chloride and carbonation resistance of architectural concrete was determined to evaluate the protection performance, and the corresponding surface-color-consistency was adopted to characterize its decoration performance. The results show that the total and free chloride of concrete in the marine atmosphere zone and the tidal zone generally decreases with depth; chloride content arguments significantly with exposure time, with a chloride maximum peak near the surface. Moreover, the chloride diffusion coefficient is small throughout the measurements, indicating the superior chloride resistance of architectural concrete. Furthermore, architectural concrete also possesses excellent carbonation resistance based on the carbonation depth data obtained from the carbonation experiment. Therefore, architecture concrete served as protection covers can withstand both the chloride attack and carbonation tested in this paper. In addition, carbonation was found to have a profound influence on the aesthetics of architectural concrete. Therefore, carbonation should be carefully handled for better maintaining the aesthetic appearance of architectural concrete in long-term service.

show abstract

Section: Basic Propertiessupporting

confidence: 83%

Section: Carbonationmentioning

confidence: 82%

Durability and Aesthetics of Architectural Concrete under Chloride Attack or Carbonation

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, some researchers also reported a threshold for carbonation under sustained compressive load at a stress level of around 0.2–0.3 [ 50 , 51 , 52 , 53 ], which is similar to the results for permeability. Interestingly, the size of the specimens in their study was much smaller than the size in the previously described research (usually 100 × 100 × 400 mm 3 ).…”

Section: Carbonation Of Concrete Under Sustained Loadsupporting

confidence: 79%

Effect of the Mechanical Load on the Carbonation of Concrete: A Review of the Underlying Mechanisms, Test Methods, and Results

2021

View full text Add to dashboard Cite

As one of the major causes of concrete deterioration, the carbonation of concrete has been widely investigated over recent decades. In recent years, the effect of mechanical load on carbonation has started to attract more attention. The load-induced variations in crack pattern and pore structure have a significant influence on CO2 transport which determines the carbonation rate. With different types of load, the number, orientation, and position of the induced cracks can be different, which will lead to different carbonation patterns. In this review paper, the carbonation in cracked and stress-damaged concrete is discussed first. Then, literature about the effect of sustained load during carbonation is compared in terms of load type and load level. Finally, the advantages and disadvantages of possible test methods for investigating the effect of sustained load on carbonation are discussed with respect to loading devices, load compensation, and specimen size.

show abstract

“…Carbonation and freeze-thaw damage of concrete are important reasons for durability deterioration of concrete [8][9][10][11][12]; the research on carbonation and freeze-thaw of iron tailings powder concrete is the necessary premise to ensure its extensive application. At present, domestic and foreign scholars have some research on the use of iron tailing powder as concrete admixture, mainly focusing on the mechanical properties of concrete [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Research on Carbonation Characteristics and Frost Resistance of Iron Tailings Powder Concrete under Low-Cement Clinker System

Liu

Zhang

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The accelerated carbonation, natural carbonation, fast freeze-thaw test, and pore structure analysis of C30 and C50 concrete with different proportions of iron tailings powder and slag powder were tested, respectively. The results show that the accelerated carbonation depth and natural carbonation depth of concrete increase with the increase of iron tailings powder content. The prediction model of carbonation depth of iron tailings powder concrete is established by introducing the iron tailings content coefficient and strength influence coefficient. The error between the calculated value of the model and the test value of 28 d curing concrete natural carbonation depth is small, which proves that the model is completely feasible. When iron tailings powder accounts for 50% of mineral admixture, it is helpful to improve the frost resistance of concrete. According to the pore structure analysis, the introduction of iron tailings powder can optimize the pore structure, improve the porosity of harmless and less harmful pores, and thus improve the frost resistance.

show abstract

Influence of axial loading and carbonation age on the carbonation resistance of recycled aggregate concrete

Cited by 33 publications

References 15 publications

Durability and Aesthetics of Architectural Concrete under Chloride Attack or Carbonation

Durability and Aesthetics of Architectural Concrete under Chloride Attack or Carbonation

Effect of the Mechanical Load on the Carbonation of Concrete: A Review of the Underlying Mechanisms, Test Methods, and Results

Research on Carbonation Characteristics and Frost Resistance of Iron Tailings Powder Concrete under Low-Cement Clinker System

Contact Info

Product

Resources

About