Experimental Research on Dynamic Stability of Asphalt Mixture Based on Time-Temperature Equivalence Principle

2018 ◽  
Vol 928 ◽  
pp. 287-293 ◽  
Author(s):  
Jiang Li ◽  
Fei Chen ◽  
Sheng Jun Yu
Keyword(s):  
Dynamic Stability ◽  
Experimental Research ◽  
Equivalence Principle ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Wheel Speed ◽  
Equivalence Relations ◽  
Practical Consideration ◽  
Viscoelastic Characteristic ◽  
Different Temperatures

Asphalt mixture is a kind of a viscoelastic material with viscoelastic characteristic of time-temperature equivalence. This paper, from the engineering practical consideration, and the perspective of time-temperature equivalence principle, based on the Rutting Test of Asphalt Mixture,has obtained equivalence relations of the effect of wheel speed and temperature on asphalt mixture rut index by different wheel speed and different temperatures rutting test, so as to provide the data support for the research of anti-rutting mechanism of asphalt pavement.

scholarly journals Evaluation of High-Temperature Performance of Asphalt Mixtures Based on Climatic Conditions

Coatings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 535
Author(s):  
Yan Mu ◽  
Zhen Fu ◽  
Jian Liu ◽  
Chen Li ◽  
Wenhao Dong ◽  
...  
Keyword(s):  
High Temperature ◽  
Dynamic Stability ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Climatic Conditions ◽  
Asphalt Mixtures ◽  
High Temperature Stability ◽  
Long Duration ◽  
Different Temperatures ◽  
Modified Formula

The dynamic stability of a rutting test does not optimally reflect the high-temperature stability of asphalt mixtures. In this study, a rutting test was performed over a long duration (4 h) at different temperatures (40, 50, 60, 70 °C) for three asphalt mixtures, namely, matrix AC-16, SMA-16, and modified AC-16 asphalt mixtures. Subsequently, the temperature rutting rate was obtained after considering the annual temperature conditions of Guangdong and Beijing in China. Because the conditions of the rutting test were different from that of the actual pavement, the rut depth was calculated using a modified temperature rutting rate. This modification considered four factors: wheel trace distribution, temperature, pavement thickness, and loading rate. The calculation of the temperature rutting rate considered the climatic conditions and utilized the rutting deformation data from hour 1–4 of the rutting tests, during which the asphalt mixture was in a stable creep period. Thus, the high-temperature stability of the asphalt mixture was reflected more scientifically by the temperature rutting rate than the dynamic stability. The high-temperature rut-resistance of the asphalt mixture was found to improve significantly after the introduction of two additives (anti-rutting agent and lignin fiber). The modified formula for rut depth can realistically predict the annual rutting depth for three asphalt mixtures in a one-way driving pavement.

AC-25 Asphalt Mixture Dynamic Stability Criteria

2013 ◽  
Vol 718-720 ◽  
pp. 1855-1860
Author(s):  
Chuang Min Li ◽  
An Liu ◽  
Yun Chen
Keyword(s):  
Dynamic Stability ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Structure Design ◽  
Specimen Thickness ◽  
Stability Criteria ◽  
High Temperature Stability ◽  
Highway Engineering ◽  
Technical Specifications ◽  
Pavement Structure

With the publication of Standard test methods of bitumen and bituminous mixtures for highway engineering " in 2011, the common asphalt mixture rutting test can be carried out in accordance with the T0719-2011 in China. But in our country, the current " Technical specifications for construction of highway engineering asphalt pavement " published in 2004 describes that the nominal maximum size of more than 19mm dense-graded asphalt concrete or asphalt treated permeable base is not suitable for carrying out specimens rutting test in accordance with the size of 300mm× 300mm ×50mm, so there is no corresponding dynamic stability requirements to the commonly used AC-25 type asphalt mixture in pavement layer in China. Combined with the Dao-He expressway pavement structure design and used the T0719-2011 method of AC-25 type different thickness rutting test, the relationship between the rutting specimen thickness and the dynamic stability is established. With reference to the requirements of asphalt pavement construction specifications and pavement structure layer on high temperature stability, the 8cm thick AC-25 common asphalt mixture dynamic stability criteria is put forward. Analyzing on AC-25 with No. 50 pure asphalt mixture dynamic stability test data, the dynamic stability requirements is put forward as validation for AC-25 asphalt mixture dynamic stability criteria in Dao-He expressway.

Study on High Temperature Stability Index of Asphalt Mixture

2014 ◽  
Vol 513-517 ◽  
pp. 336-339
Author(s):  
Fu Ming Liu
Keyword(s):  
High Temperature ◽  
Dynamic Stability ◽  
Asphalt Pavement ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Stability Index ◽  
High Temperature Stability

High temperature stability of asphalt mixture is one of asphalt pavement major performance which concerns the permanent deformation of the pavement. Four different gradations were used to detect the mixture high temperature stability, dynamic stability or short for rut distortion for regress time was obtained from regression for the data of rutting test, and the test indicates that either of these two indexes can better characterize high temperature stability of asphalt mixture.

Experimental Study on the Rutting Deformation Mechanism of Asphalt Pavement

2013 ◽  
Vol 790 ◽  
pp. 169-172
Author(s):  
Yong Ye ◽  
Hong Kai Chen
Keyword(s):  
Failure Modes ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
High Grade ◽  
Load Duration ◽  
Pavement Materials ◽  
Influence Mechanism ◽  
Different Temperatures ◽  
The Common ◽  
Main Factors

Asphalt mixture is the common pavement materials in high-grade highway. The rutting is one of the main failure modes. Temperature and loading are the two main factors cause rutting of pavement.The rutting experiment were carried under same loading in different temperatures and in same temperature under different loading, the relation curves between rutting deformation and load duration were obtained. Comparing the rutting deformation and dynamic stability, the influence mechanism of temperature and loading to rutting is studied by the experimental method. The research results have theoretical guidance meaning in controling the rutting deformation of pavement materials and prolonging the service life of asphalt pavement.

scholarly journals Experimental Research on Crack Resistance of Fiber Asphalt Mixture in Cold Area

2021 ◽  
Vol 791 (1) ◽  
pp. 012072
Author(s):  
Bo Peng ◽  
Shuai Liu ◽  
Wenying Li ◽  
Jingwen Peng ◽  
Yilang Li ◽  
...  
Keyword(s):  
Crack Resistance ◽  
Experimental Research ◽  
Asphalt Mixture ◽  
Cold Area

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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