Study on the applicability of asphalt concrete skeleton in the semi-flexible pavement

Zhao, Weitian; Yang, Qun

doi:10.1016/j.conbuildmat.2022.126923

Cited by 28 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the relevant test methods in Section 1.4, the dynamic models of SUP-13, SUP-20, SUP-25, and SFM of pavement structure were tested at different temperatures. Previous works showed that the dynamic modulus changed from 1800MPa to 2000MPa with temperature changing from 60°C to -10°C [ 24 , 25 ]. Based on the previous simulations, the most commonly used Poisson’s ratio of SFM were 0.25 [ 26 , 27 ] and 0.3 [ 28 , 29 ].…”

Section: Fe Model Constructionmentioning

confidence: 99%

Structural layer applicability of semi-flexible material for rutting resistance: A coupled temperature-mechanical approach

Yu,

He,

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

Semi-flexible material (SFM) is produced by pouring cement grouting material into the asphalt concrete skeleton. It exhibits both characteristics of cement and asphalt, increasing structural stiffness and reducing rutting. Extensive studies have shown that the temperature load coupling effect is one of the leading causes of road rutting. However, few researchers focused on the anti-rutting impact and structural layer applicability of SFM under this effect. Thus, a coupled temperature-mechanical approach was developed based on the finite element (FE) method to simulate the rutting of SFM at different pavement layers and times of the day. During simulation, both standard load and overload were applied to the FE model of pavement. Asphalt mixture and SFM specimens were prepared for essential road performance and dynamic modulus testing. The mechanical properties of SFM and asphalt mixtures at different temperatures were obtained based on the measured data. The structural layer applicability of SFM was revealed by simulating the response of the pavement structure under the combined action of temperature and load. An accelerated pavement test (APT) based validation indicated that the simulation results were accurate. The results show that traditional asphalt pavement and pavement with SFM at the surface and bottom layers tend to exhibit dilative heave adjacent to the wheel load. Using SFM at the middle layer shows a compacted rutting mode, and the pavement has a minimum rise of 51% in rutting depth under the double overloading compared with the pavements with SFM in other layers. It implies that using SFM in the middle layer gives optimal resistance to overload. Considering the depth, form, and resistance of rutting, the SFM in the middle layer of pavement can functionally exert its anti-rutting characteristic.

show abstract

Section: Fe Model Constructionmentioning

confidence: 99%

Structural layer applicability of semi-flexible material for rutting resistance: A coupled temperature-mechanical approach

Yu,

He,

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…However, the cost of these whiskers is usually high and the reinforce effect would be discounted once these whiskers were not uniformly mixed. Particle grading strategy with fine particles filling the interspace of coarse particles could maximize the packing density of powder mixture [16] and thus improve the final density and mechanical strength of the bulk counterparts, which has been widely adopted in the fields of cements [17,18] and ceramics [19].…”

Section: Introductionmentioning

confidence: 99%

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

Liang,

Zhang,

et al. 2024

Journal of Advanced Ceramics

View full text Add to dashboard Cite

Porous ceramics usually requires high mechanical strength and maximized porosity simultaneously, while for conventional particle grading strategy it is highly challenging to meet both demands. To this end, a reverse particle grading strategy was developed based on the linear packing J u s t A c c e p t e d 2 model by unusually introducing coarse particles (d50 = 16 μm) into fine particles (d50 = 5 μm) matrix.Followed by the extrusion and sintering process, tubular porous SiC ceramic supports with improved mechanical strength were successfully fabricated. Effects of coarse particles on the rheology properties of the ceramic paste, and macroscopic properties and microstructure of SiC supports were systematically investigated. With the increasing content of coarse SiC particles to 30 wt%, the pressure generated in extrusion decreased from 5.5 ± 0.2 MPa to 1.3 ± 0.1 MPa. Notably, the bending strength of tubular supports increased from 36.6 ± 5.6 MPa to 49.1 ± 4.5 MPa when incorporating 20 wt% of coarse powders. The notable improved mechanical strength was attributed to the distribution of coarse particles that prolonged the route of crack deflection. Also, the optimized tubular supports showed an average pore size of 1.2 ± 0.1 μm and open porosity of 45.1 ± 1.6 % and water permeability of 7163 ± 150 L•m -2 •h -1 •bar -1 and good alkali and acid corrosion resistances. Significantly, the strategy was proved to be feasible in the scale-up fabrication of 19channel SiC tubular porous ceramic supports.

show abstract

“…Ding et al [8] evaluated the performance of semifexible pavements based on the volumetric parameters of the matrix asphalt mixtures and disclosed that the high-temperature stability and low-temperature stability of semifexible pavement materials were superior to those of conventional asphalt pavement materials. Zhao and Yang [9] explored the formation of SFP materials based on asphalt concrete skeletons under fve distinct gradation types and the low-temperature crack resistance performance of these fve skeletons was tested and evaluated. Te results displayed that the low-temperature crack resistance capability of the SFP materials based on the continuously graded asphalt concrete skeletons was better than that of other SFP materials.…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Grouting Material Strength on Semiflexible Pavement Material

Yang

Zou³

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

In this study, cement mortars with different strengths are poured into the large void matrix asphalt macadam material as a semiflexible pavement (SFP) material and the experimental research is carried out. The current research on SFP is mainly focused on the performance of grouting materials and the influence of grouting matrix materials on the overall mechanical properties of SFP and road performance. However, there are some flaws in the study of the influence of grouting material strength on the performance of SFP materials: the difference between the strengths of the selected grouting materials is relatively small, and in some studies, the chosen grouting material strength is low, which leads to insignificant improvements of SFP material performance; besides, the research indicators are also not very comprehensive. In this study, cement grouting asphalt macadam materials are selected as the research object to examine the effect of grouting material strength on the mechanical properties and road performance of SFP materials. Grouting materials with strengths of 19.8 MPa, 30.7 MPa, and 40.2 MPa were poured into the matrix asphalt macadam with a target void ratio of 24% and asphalt content of 2.9% to prepare the corresponding SFP test specimens. The SFP specimens were then subjected to the compressive test, flexural and tensile test, high-temperature stability test, and low-temperature crack resistance test, and the compressive resilient modulus was measured, thereby analyzing the effect of the cement slurry strength on the cement grouting asphalt macadam materials. The results show that when the strength of the cement mortar is 19.8 MPa, 30.7 MPa, and 40.2 MPa, the corresponding SFP material has better mechanical properties. When the strength of the grouting material is 40.2 MPa, the compressive strength of the SFP material is about the same as that of the grouting material. The strength is more than double that of 19.8 MPa and 30.7 MPa, and the flexural tensile strength and elastic modulus also have the above growth laws. The low-temperature crack resistance and high-temperature stability of the SFP material are enhanced with the increase in the strength of the grouting material. When the strength of the grouting material is 40.2 MPa, the mechanical properties and road performance of the SFP material are relatively better. This study provides a reference for strengthening the mechanical properties of SFP materials and boosting the crack resistance of SFP.

show abstract

Study on the applicability of asphalt concrete skeleton in the semi-flexible pavement

Cited by 28 publications

References 18 publications

Structural layer applicability of semi-flexible material for rutting resistance: A coupled temperature-mechanical approach

Structural layer applicability of semi-flexible material for rutting resistance: A coupled temperature-mechanical approach

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

Study of the Effect of Grouting Material Strength on Semiflexible Pavement Material

Contact Info

Product

Resources

About