Estimation of service-life reduction of asphalt pavement due to short-term ageing measured by GPC from asphalt mixture

2015 ◽  
Vol 17 (1) ◽  
pp. 153-167 ◽  
Author(s):  
Sungun Kim ◽  
Seong H. Lee ◽  
Ohsun Kwon ◽  
Joong Y. Han ◽  
Young S. Kim ◽  
...  
Keyword(s):  
Service Life ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Short Term

scholarly journals Test of AC - 20 asphalt mixture ratio on the runway of Da Lian Airport

2021 ◽  
Vol 293 ◽  
pp. 02002
Author(s):  
Shuaituan Tian ◽  
Lei Guo ◽  
Jixiang Su ◽  
Kunyang Zhao
Keyword(s):  
Service Life ◽  
Bond Strength ◽  
Raw Materials ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Pavement Performance ◽  
Optimum Ratio ◽  
Mixture Ratio ◽  
Modified Asphalt ◽  
Design Optimum

After years of use, there’s oil loss on the asphalt pavement. the bond strength of aggregate decreases. Loose threshing is serious. In order to improve the pavement performance, Extend the service life of pavement, Improve the safety of aircraft operation. we test the AC-20 modified asphalt mixture on the runway of Da Lian Airport from many factors, including raw materials, admixtures, gradation design, optimum ratio of oil to stone, then we find the best ways to resolve it.

scholarly journals Test of SMA - 16 asphalt mixture ratio on the runway of Da Lian Airport

2021 ◽  
Vol 293 ◽  
pp. 02038
Author(s):  
Shuaituan Tian ◽  
Kunyang Zhao ◽  
Lei Guo ◽  
Hanxun Wang
Keyword(s):  
Service Life ◽  
Bond Strength ◽  
Raw Materials ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Pavement Performance ◽  
Optimum Ratio ◽  
Mixture Ratio ◽  
Modified Asphalt ◽  
Design Optimum

After years of use, there’s oil loss on the asphalt pavement. the bond strength of aggregate decreases. Loose threshing is serious. In order to improve the pavement performance, Extend the service life of pavement , Improve the safety of aircraft operation. we test the SMA-16 modified asphalt mixture on the runway of Da Lian Airport from many factors, including raw materials, admixtures, gradation design, optimum ratio of oil to stone, then we find the best ways to resolve it.

Achieving Asphalt Pavement Density with Minimal Mat Defects

2021 ◽  
pp. 036119812110200
Author(s):  
Adam J. T. Hand ◽  
Timothy Aschenbrener ◽  
Nam Tran ◽  
Fabricio Leiva
Keyword(s):  
Service Life ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Pavement Performance ◽  
Construction Process ◽  
Compaction Processes ◽  
Departments Of Transportation

It is well established that in-place density significantly influences asphalt pavement performance and service life. This paper discusses solutions to challenges that agencies and contractors often face when trying to achieve density requirements, or increase density, while eliminating compaction-related mat defects during the construction process. The basics of the asphalt pavement compaction processes, equipment, operations, and asphalt mixture densification are first presented, followed by information collected on a series of FHWA sponsored departments of transportation (DOTs) density demonstration projects. The authors then summarize the root causes associated with challenges in obtaining the desired density without compaction-related mat defects in a series of categories based on the DOT demonstration projects and experience assisting contractors with obtaining density on hundreds of projects. Examples are described for each category along with potential opportunities for improvements to overcome them. The demonstration projects illustrated that it is possible to make improvements when agencies and contractors embrace the idea of increasing density and reducing mat defects.

scholarly journals 2D-wavelet based micro and macro texture analysis for asphalt pavement under snow or ice condition

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Feng Li ◽  
Gulnigar Ablat ◽  
Siqi Zhou ◽  
Yixin Liu ◽  
Yufeng Bi ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Micro Scale ◽  
Braking System ◽  
Macro Scale ◽  
Texture Characteristics ◽  
The Mean ◽  
Resistance Performance

AbstractIn ice and snow weather, the surface texture characteristics of asphalt pavement change, which will significantly affect the skid resistance performance of asphalt pavement. In this study, five asphalt mixture types of AC-5, AC-13, AC-16, SMA-13, SMA-16 were prepared under three conditions of the original state, ice and snow. In this paper, a 2D-wavelet transform approach is proposed to characterize the micro and macro texture of pavement. The Normalized Energy (NE) is proposed to describe the pavement texture quantitatively. Compared with the mean texture depth (MTD), NE has the advantages of full coverage, full automation and wide analytical scale. The results show that snow increases the micro-scale texture because of its fluffiness, while the formation of the ice sheets on the surface reduces the micro-scale texture. The filling effect of snow and ice reduces the macro-scale texture of the pavement surface. In a follow-up study, the 2D-wavelet transform approach can be applied to improve the intelligent driving braking system, which can provide pavement texture information for the safe braking strategy of driverless vehicles.

scholarly journals Data-Driven Study on the Sustainable Log Movements: Impact of Rail Car Fleet Size on Freight Storage and Car Idling

2020 ◽  
Vol 12 (11) ◽  
pp. 4563
Author(s):  
Sangpil Ko ◽  
Pasi Lautala ◽  
Kuilin Zhang
Keyword(s):  
Service Life ◽  
Seasonal Dynamics ◽  
Lake Superior ◽  
Data Driven ◽  
Short Term ◽  
Fleet Size ◽  
Interesting Observation ◽  
The Us ◽  
Term Storage ◽  
Scale Data

Rail car availability and the challenges associated with the seasonal dynamics of log movements have received growing attentions in the Lake Superior region of the US, as a portion of rail car fleet is close to reaching the end of its service life. This paper proposes a data-driven study on the rail car peaking issue to explore the fleet of rail cars dedicated to being used for log movements in the region, and to evaluate how the number of cars affects both the storage need at the sidings and the time the cars are idled. This study is based on the actual log scale data collected from a group of forest companies in cooperation with the Lake State Shippers Association (LSSA). The results of our analysis revealed that moving the current log volumes in the region would require approximately 400–600 dedicated and shared log cars in ideal conditions, depending on the specific month. While the higher fleet size could move the logs as they arrive to the siding, the lower end would nearly eliminate the idling of rail cars and enable stable volumes throughout the year. However, this would require short-term storage and additional handling of logs at the siding, both elements that increase the costs for shippers. Another interesting observation was the fact that the reduction of a single day in the loading/unloading process (2.5 to 1.5 days) would eliminate almost 100 cars (20%) of the fleet without reduction in throughput.

Key Technique on the Process Control for Construction of Hohhot Circle Expressway Asphalt Pavements

2012 ◽  
Vol 256-259 ◽  
pp. 1748-1753
Author(s):  
Bin Zhao ◽  
Pei Wen Hao
Keyword(s):  
Inner Mongolia ◽  
Raw Materials ◽  
Asphalt Pavement ◽  
Load Capacity ◽  
Asphalt Mixture ◽  
Natural Increase ◽  
Rigid Base ◽  
Construction Technology ◽  
Pavement Structure ◽  
Major Section

As vehicle flow on arterial highway in Inner Mongolia sharply increased, the originally designed natural increase rate of 8% per year has been exceeded on the vehicle flow in some sections. According to statistics, monthly average vehicle flow on major section of G6 expressway has reached a standard flow of 67478 vehicles per day and night, of which in 70-80% are large ones for coal transportation. Therefore, pavement load and road capacity have exceed the designed expressway load capacity. At present, semi-rigid base asphalt pavement structure is still widely used for high-grade highway pavement in Inner Mongolia. With years of construction for such pavement structure, a great deal of valuable experience has been gained on construction technology. However, there are still a few deficiencies in the quality of raw materials, gradation control of asphalt mixture and adjustment of equipment, etc. Hohhot circle expressway connects with the G6 and G7 expressways, suffering from problems such as large vehicle flow and load overweight. This paper introduced a key technique that should be properly controlled during construction of such pavement structure, emphasized technique control and management of the following aspects, i.e. ballast sizes and gradation control, asphalt concrete mixture, adjustment of pavers, validation of mixing proportion in production and reasonable arrangement of process, and summarized corresponding technical measures taken during construction of asphalt pavement in this project.

Mechanical Response Analysis of the Composite Asphalt Pavement

2014 ◽  
Vol 1023 ◽  
pp. 28-31
Author(s):  
Li Min Li
Keyword(s):  
Service Life ◽  
Mechanical Response ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Pavement Design ◽  
Rigid Base ◽  
Response Analysis ◽  
Early Failure ◽  
Short Service Life ◽  
Design Software

With the constant increasing of traffic flow and axle load, the early failure of semi-rigid base asphalt pavement is increasingly serious in China. The bad durability and short service life of pavement have become main obstacles in road construction development. Based on the experience of successful application, the early failure of semi-rigid base asphalt pavement is solved, and the service life of pavement is increased by using of the composite asphalt pavement. To solve the design problem of the composite asphalt pavement , its mechanical properties influence results of are obtained by the factors, such as shear strain, shear stress, compression strain on top of subgrade, etc, by a lot of calculation using Shell pavement design software. These provide theoretical basis for durable asphalt pavement design based on rut-resistance property.

scholarly journals Fabrication and Evaluation of Nano-TiO2 Superhydrophobic Coating on Asphalt Pavement

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 211
Author(s):  
Hongfeng Li ◽  
Xiangwen Lin ◽  
Hongguang Wang
Keyword(s):  
Contact Angle ◽  
Stearic Acid ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Waterborne Polyurethane ◽  
Superhydrophobic Coating ◽  
Nano Tio2 ◽  
Sem Image ◽  
Low Surface Energy ◽  
Water Damage

In order to address water damage of asphalt pavement, reduce the occurrence of water-related potholes, deformation, and other diseases, and improve the performance and service life of the pavement, a nano-TiO2 superhydrophobic coating (PSC) on asphalt pavement was prepared from waterborne polyurethane and nano-TiO2 modified by stearic acid. FT-IR measured stearic acid successfully modified low surface energy substance on the surface of nano-TiO2. The SEM image shows that the PSC has a rough surface structure. The contact angle and rolling angle of the PSC in the contact angle test are 153.5° and 4.7°, respectively. PSC has a super-hydrophobic ability, which can improve the water stability of the asphalt mixture. Although the texture depth and pendulum value have been reduced by 2.5% and 4.4%, respectively, they all comply with the standard requirements. After the abrasion resistance test, the PSC coating still has a certain hydrophobic ability. These results surface PSC coating can effectively reduce water damage on asphalt pavement, and has considerable application value.

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