Investigation of Voids Characteristics in an Asphalt Mixture Exposed to Salt Erosion Based on CT Images

Xiong, Rui; Jiang, Wenyu; Fa, Yang; Li, Kehong; Guan, Bowen; Zhao, Henan

doi:10.3390/ma12223774

Cited by 36 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The boundary of different components in the CT image is clear and continuous, and there is no component information missing in the CT image of asphalt pavement. The effectiveness of the OTSU algorithm in segmenting the aggregates and voids of the asphalt mixture has also been verified in some of the literature [ 24 , 25 , 26 ]. Obviously, segmenting different components in a CT image of a pavement core sample by the improved OTSU threshold separation method is reliable.…”

Section: Separation Of Mixture Components For Asphalt Pavementmentioning

confidence: 82%

A Novel Evaluation Method of Construction Homogeneity for Asphalt Pavement Based on the Characteristic of Component Distribution

et al. 2022

View full text Add to dashboard Cite

To effectively evaluate the construction homogeneity of asphalt pavement, the tomography image of a core sample of asphalt pavement was obtained via industrial computed tomography (CT) equipment. According to the characteristics of CT images, an improved separation algorithm based on annular partition and Nobuyuki Otsu (OTSU) threshold segmentation was proposed. Based on the distribution of aggregates, voids and asphalt mortar, and the area ratio of each part in the CT images inside the pavement, a novel evaluation method for the distribution homogeneity of asphalt pavement components was put forward, and the validity of the evaluation index was also verified. The results show that the aggregates, voids and asphalt mortar in CT images can be effectively segmented by annular partition combined with the OTSU threshold separation algorithm. By superimposing the segmented image on the original image, the segmentation and identification effects of aggregates, voids and asphalt mortar in the CT image are confirmed. Compared with a non-segregated specimen, the average values of the horizontal heterogeneity coefficients of high, medium, light and fine-aggregate-segregated mixtures increased by 72.0%, 48.3%, 34.7% and 16.1%, respectively, where the change range is in accordance with the segregation degrees of several mixtures. The indirect tensile strength of fine-aggregate-, light-, medium- and high-segregated asphalt mixtures decreased by 8.3%, 16.7%, 25.0% and 45.8%, respectively, when compared with the non-segregated asphalt mixture. The index of the vertical heterogeneity coefficient has good correlation with the indirect tensile strength of segregated asphalt mixtures. The construction quality homogeneity of asphalt pavement in different regions can be reliably evaluated by the horizontal heterogeneity coefficient and vertical heterogeneity coefficient.

show abstract

Section: Separation Of Mixture Components For Asphalt Pavementmentioning

confidence: 82%

A Novel Evaluation Method of Construction Homogeneity for Asphalt Pavement Based on the Characteristic of Component Distribution

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The main working principle of spreading the deicing salt snow melting agent is based on the freezing point reduction theory [ 14 , 15 ]. The so-called freezing point refers to the temperature when a substance reaches the state of solid-liquid coexistence.…”

Section: Introductionmentioning

confidence: 99%

“…They found that there is a linear relationship between the splitting strength of asphalt mixture in the salt erosion condition and its void characteristics. The crystallization pressure caused by salt will accelerate the development of internal pores of asphalt mixture, resulting in a decrease in its mechanical properties [ 14 ]. Wang et al investigated the pavement performances of asphalt mixture containing salt-storage aggregates with the function of snow melting [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Performance Deterioration of Asphalt Mixture under Chloride Salt Erosion

et al. 2021

View full text Add to dashboard Cite

In order to ensure smooth traffic and driving safety, deicing salt or snow melting agents are usually adopted to solve the problem of traffic jams and prevent pavement surfaces from freezing. The objective of this present study is to investigate the performance deterioration evaluation of asphalt mixture under the chloride salt erosion environment. Five chloride salt solution concentrations were designed and the uniaxial static compression creep test, low-temperature IDT test, freeze-thaw splitting test, and freeze-thaw cycle test were carried out for asphalt mixtures (AC-16) soaked in chloride salt solution. Results showed that with the increase in chloride salt solution concentration, the high-temperature stability, low-temperature crack resistance, and water stability of the asphalt mixture decreases. Moreover, the high-temperature stability, low-temperature crack resistance, and water stability of the asphalt mixture show a decreasing trend under different chloride salt solution concentrations following the negative cubic polynomial function. Based on the viscoelastic analysis, chloride salt solution could reduce the ability of the asphalt mixture to resist instantaneous elastic deformation and permanent deformation, and this influence will become more obvious with the increase in chloride salt solution concentration. In addition, the salt freeze-thaw cycle test indicated that in the early stage of freeze-thaw cycles, the splitting tensile strength of the asphalt mixture decreases rapidly, then tends to be flat, and then decreases rapidly. This study explores the performance damage law of asphalt mixture under salt corrosion, and the analysis results of this study could provide some references for the chloride salt dosage in the snow melting project while spreading deicing salt.

show abstract

“…However, asphalt pavement is prone to high temperature rutting, low temperature cracking, water damage and spalling [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. In some special natural environments, especially in coastal areas and northwest saline soil areas, corrosion medium such as sulfate–chloride would lead to the serious damage of asphalt pavement after several years of service, and the service life of the road is greatly reduced [ 11 , 12 , 13 , 14 , 15 ]. In addition, the road surface is easy to freeze in winter.…”

Section: Introductionmentioning

confidence: 99%

“…The method of spreading deicing salt, a snow melting agent with the function of quick deicing and snow melting, could be considered an effective method to solve the problem of traffic jams and prevent the pavement from continuing to freeze [16,20]. The theory principle of spreading deicing salt, a snow melting agent, is generally based on the freezing point reduction theory [13,15]. The so-called freezing point refers to the temperature when Materials 2021, 14, 3089 2 of 14 a substance reaches the state of solid-liquid coexistence and two-phase equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion

et al. 2021

View full text Add to dashboard Cite

This study aims to investigate the performance evolution and mechanism of asphalt under action of chloride salt erosion. Asphalt samples soaked with five different snow melting chloride salt concentrations were taken as the research object. Then, the high-temperature performance, low-temperature performance, temperature sensitivity and asphalt–aggregate adhesion property of asphalt samples were carried out. Additionally, Fourier transform infrared spectroscopy (FTIR) was used to explore the mechanism of chloride salt erosion on asphalt. Test results showed the linear variation relationships of high-temperature performance, low-temperature performance and temperature sensitivity with chloride salt concentrations. The high-temperature performance of asphalt would be improved by chloride snowmelt salt. With the increase in the chloride salt solution concentration, the low-temperature performance of asphalt became worse, and the temperature sensitivity increased. Moreover, after the effect of the chloride salt solution, the asphalt–aggregate adhesion property decreased with the increase in the chloride salt solution concentration. It is necessary to control the amount of chloride snowmelt salt in the actual snow removal projects. Finally, based on Fourier transform infrared spectroscopy, the mechanism of chloride salt erosion on asphalt was preliminarily explored. With the increase in the chloride salt solution concentration, the proportion of light components (saturated fraction, aromatic fraction) in asphalt decreased, and the proportion of heavy components (resin and asphaltene) with good thermal stability increased.

show abstract

Investigation of Voids Characteristics in an Asphalt Mixture Exposed to Salt Erosion Based on CT Images

Cited by 36 publications

References 15 publications

A Novel Evaluation Method of Construction Homogeneity for Asphalt Pavement Based on the Characteristic of Component Distribution

A Novel Evaluation Method of Construction Homogeneity for Asphalt Pavement Based on the Characteristic of Component Distribution

Performance Deterioration of Asphalt Mixture under Chloride Salt Erosion

Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion

Contact Info

Product

Resources

About