Experimental Study on Asphalt Pavement Damage by Application of Acetate-Base Deicer

2011 ◽  
Vol 97-98 ◽  
pp. 251-256
Author(s):  
Qing Yi Xiao ◽  
Hui Jing Wang ◽  
Ning Li Li ◽  
Cai Li Zhang
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Corrosion Mechanism ◽  
Performance Variation ◽  
Asphalt Mix ◽  
Pavement Damage ◽  
Metallic Corrosion ◽  
Shed Light ◽  
Ice Control ◽  
Deicing Agents

Large amounts of deicing agents (abbr. Deicer) were applied on road pavements for snow and ice control each year in the cold region. The traditional deicers used on pavements resulted in metallic corrosion of vehicle and serious adverse environmental impacts. By contrast, acetates and formates were more environmentally friendly and more effective. After application of new deicers, heavy binder bleeding and severe stripping problems were observed occurring together with loss of asphalt pavement stability in northen Europe and northen America. Recently the large quantities of acetate-based deicers applied each year in China, damage by the deicers similar to that observed in those wereas would also occur in China. To shed light on neglected distress by deicer and guide the best practices of deicer application, asphalt mix design and maintenance of asphalt pavement, the paper revealed the asphalt mixture performance variation corroded by deicers and corrosion mechanism using immersion tension test, aqueous solutiion test and immersion penetration test.

scholarly journals Effect of Adding Crushed Glass to Asphalt Mix

2016 ◽  
Vol 62 (2) ◽  
pp. 35-44 ◽  
Author(s):  
Y. Issa
Keyword(s):  
Specific Gravity ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Waste Glass ◽  
Maintenance Cost ◽  
Original Sample ◽  
Air Voids ◽  
The World ◽  
Asphalt Mix

Abstract The need to modify conventional pavement rises due to high maintenance cost of the highway systems. With the continuously increased consumption, a large amount of waste glass materials is generated annually in the world. This paper aims to study the performance of pavement asphalt in which a fractional aggregate is replaced with crushed glass. In this paper, some important properties of asphalt mix, including stability, flow, specific gravity and air voids are investigated. The original sample is prepared without adding glass for different percentages of bitumen. Other samples are prepared by adding crushed glass to the mix with 5%, 10%, and 15% by aggregate weight. The results show that the properties of glass-asphalt mixture are improved in comparison with normal asphalt pavement. It is concluded that the use of waste glass in asphalt pavement is desirable.

Research on Water Damage of Asphalt Pavement and Control Measures

2012 ◽  
Vol 178-181 ◽  
pp. 1560-1563 ◽  
Author(s):  
Yan Liu ◽  
Bo Liu
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
Water Source ◽  
Control Measures ◽  
Water Damage ◽  
Prevention And Control Measures ◽  
Pavement Damage ◽  
And Control

Asphalt pavement of water damage is a major form of our country highway asphalt pavement damage, the paper analyzes pavement structure internal water source, water damage of asphalt pavement of the influence factors, through the determination of the three indexes and asphalt of asphalt mixture splitting tensile strength, water erosion proof of asphalt mixture and its influence, and put forward the corresponding prevention and control measures to improve the pavement performance and extend the service life of road surface has important practical value.

scholarly journals Laboratory and Field Investigation of the Feasibility of Crumb Rubber Waste Application to Improve the Flexibility of Anti-Rutting Performance of Asphalt Pavement

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1738 ◽  
Author(s):  
Hongyin Li ◽  
Hailong Jiang ◽  
Wenwu Zhang ◽  
Peng Liu ◽  
Shanshan Wang ◽  
...  
Keyword(s):  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Field Investigation ◽  
Compression Tests ◽  
Modified Asphalt ◽  
Asphalt Mix ◽  
Low Temperature Cracking ◽  
Indirect Tensile

Resistance of asphalt mix to low-temperature cracking and rutting at high temperature is very important to ensure the service performance of asphalt pavement under seasonal changes in temperature and loading. However, it is challenging to balance the improvement of such resistance by using additives, e.g., anti-rutting agent (ARA). This study focuses on improving the flexibility of anti-rutting asphalt mix by incorporating crumb rubber (CR) and ARA. The properties of the prepared modified asphalt mix were evaluated in the laboratory by performing wheel tracking, three-point bending, indirect tensile, and uniaxial compression tests. The experimental results showed that the dynamic stability of modified asphalt mix was significantly increased due to the addition of ARA and further improved by incorporating CR. The maximum bending strain at −10 °C was increased due to the contribution of CR. The results of indirect tensile strength and resilient modulus further indicated that the CR-modified anti-rutting mixture was more flexible. Moreover, the field observation and evaluation indicated that the CR-modified anti-rutting asphalt pavement met the standard requirements, better than normal asphalt mixture in many parameters. A conclusion can be made that incorporating CR in asphalt mixture prepared with ARA can improve pavement performance at both high and low in-service temperatures.

Early Diseases of Asphalt Pavement Damage of Water Research and Countermeasures

2014 ◽  
Vol 707 ◽  
pp. 532-535
Author(s):  
Zhi Ming Zhang
Keyword(s):  
Prevention And Control ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Great Influence ◽  
Key Factors ◽  
Early Disease ◽  
Road Engineering ◽  
Water Damage ◽  
Pavement Damage ◽  
And Control

The life cycle of a road engineering usually contains multiple stages. It starts from design, through the construction, usage and damaged to discarded. Early disease water damage of asphalt pavement has great influence on the service life of road surface. Through analyzing the mechanism of water damage and summarizing the main forms of water damage, this paper puts forward the reasonable distribution of asphalt mixture and the good rigidity relationship between base and surface, which is the key factors to avoid water damage. We analyze and summarize the advantage of drainage asphalt pavement in the prevention and control of water damage of asphalt pavement in order to apply it in the practice of engineering.

Analysis on the Reliability of Asphalt Pavement

2011 ◽  
Vol 243-249 ◽  
pp. 4147-4151 ◽  
Author(s):  
Qing Guo Yang ◽  
Li Yan Dong ◽  
Jin Cheng Ning
Keyword(s):  
Early Stage ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Early Period ◽  
Asphalt Pavements ◽  
Design Parameters ◽  
Construction Process ◽  
Actual Material ◽  
Pavement Damage

The asphalt pavements which are designed for 15-years usage are often highly damaged in the early period. In order to eliminate this phenomenon, researches have been carried out in many aspects, but the situation of asphalt pavement damage cannot be essentially changed. In the view of reliability, the frequent early stage damage phenomenon of asphalt pavements means that nowadays process of asphalt pavements must have not sufficient reliability, and just it leads the asphalt pavements can not reach the design purpose. Based on the basic engineering reliability theory, the reliability of the asphalt pavement design, from the determination of effect actions to selection of material parameters and the calculative model about pavement, has been analyzed; meanwhile the reliability of construction process has been analyzed too. The analysis on the reliability of asphalt pavement shows that the determination of design parameters makes the actual material is weaker than design; the construction process of the asphalt pavement makes the asphalt mixture greatly different anticipations and makes the layer condition deviated the ideal bonding condition. It is just these various uncertainties in design and construction that causes the asphalt pavement damage in early stage. So in order to change the situation of early damage in asphalt pavement, the effective measures are to focus on the reliability of design and constructions.

scholarly journals Heat Transfer Characteristics of Asphalt Mixtures with Different Thicknesses

2021 ◽  
Vol 21 (4) ◽  
pp. 169-177
Author(s):  
Kwanho Lee ◽  
Seongkyum Kim
Keyword(s):  
Heat Transfer ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Recycled Aggregate ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Surrounding Environment ◽  
Pavement Damage ◽  
Pavement Thickness

Generally, the main causes of asphalt pavement damage are repeated loads and increased temperatures. The surrounding environment and material factors influence the degree of damage. In this study, the heat transfer characteristics with a change in the asphalt pavement thickness were analyzed. The sample types were the conventional dense asphalt mixture (WC-2), dense asphalt mixture containing 30% recycled aggregate (ReWC-2), and drainage asphalt mixture (PA-13). The mixtures were compacted using a rotary compactor. Thermal accumulation tests on samples with thicknesses of 3, 5, and 10 cm were performed. The values for the 10-cm-thick samples were 1.27 for WC-2, 1.28 for ReWC-2, and 0.91 for PA-13. The thermal conductivity tended to decrease as the pavement thickness increased. An experimental study on the heat transfer characteristics with varying thicknesses of asphalt pavement suitable for energy harvesting was conducted.

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.

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.

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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