The Influence of Asphalt Mixture Components on Pavement Skid Resistance and Accident Rate in Urban Un-signalized Intersections

This paper is a review of the chemical and physical properties of coconut fiber in asphalt mixtures. Coconut fibers (CF) are natural fibers and also an agricultural waste, which is abundant after the extraction of juice and coconut fruit. Nowadays, CF has been studied for its potential use in the construction field to increase the strength of materials with its high tensile strength. Additionally, CF can also be one the materials in highway construction as it can improve the skid resistance of asphalt pavements. It was shown that CF treated with NaOH lowered the penetration value and increased the softening point of modified bitumen. Flow of bitumen also can be avoided at high mixing and compaction temperatures by adding 0.7% of CF.

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Investigation of Impact of Aggregate Coating by Bitumen on Change of Micro Texture Values

European Journal of Engineering Science and Technology ◽

10.33422/ejest.v3i1.161 ◽

1970 ◽

Vol 3 (1) ◽

pp. 52-61

Author(s):

Zuzana Florkova ◽

Jana Pastorkova ◽

Matus Farbak ◽

Zuzana Kolkova ◽

Peter Hrabovsky

Keyword(s):

Asphalt Pavement ◽

Asphalt Mixture ◽

Asphalt Mixtures ◽

Point Of View ◽

Skid Resistance ◽

Analysis Method ◽

Texture Change ◽

Bitumen Content ◽

The Individual ◽

The Impact

Asphalt pavement micro texture values primarily depend on aggregate properties used in asphalt pavement mixture and by aggregate surfaces is secured the basic contact medium with vehicle tires. It often happens that new asphalt surfaces have not required skid resistance properties and is needed a certain period of time to eliminate film of bitumen binder which is coating the aggregate grain on the surface of pavement by action of vehicles. In most cases, the investigation of the aggregate micro texture impact on the pavement skid resistance properties is carried out under laboratory conditions and generally relates only to measurements on natural aggregate samples (without bitumen). However, due to coating of aggregate by bitumen binder, valleys between the individual peaks of aggregate are filled. Obviously, it can be supposed that the usage of high amount of bitumen content can leads to decreasing of aggregate micro texture values. From this point of view, it can be expected that change in micro texture values depends on the content of binder in the asphalt mixture. Particular aggregate grains were taken from asphalt mixtures samples (AC 8, AC 11 and SMA 11) produced in the laboratory, in order to determine the impact of aggregate coating by bitumen binder on micro texture change. Each usage asphalt mixture was produced with three different bitumen binder contents. Digital image analysis method was used for subsequent evaluation. Changes in the micro texture values depending on the amount of used bitumen binder and also on the calculated theoretical bitumen film thickness are investigated in the conclusion.

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Effect of Characteristics of Different Types of Bauxite Clinker on Adhesion

Applied Sciences ◽

10.3390/app9224746 ◽

2019 ◽

Vol 9 (22) ◽

pp. 4746 ◽

Cited By ~ 1

Author(s):

Xirong Wu ◽

Nanxiang Zhen ◽

Fansheng Kong

Keyword(s):

Economic Value ◽

Asphalt Mixture ◽

Skid Resistance ◽

Entropy Analysis ◽

Type B ◽

Characteristic Parameters ◽

Adsorption Method ◽

Grey Correlation ◽

Different Types ◽

Selection Of

Based on the fact that bauxite clinker has minor thermal conductivity and better skid resistance and wear-resisting property, it can be used in HFST (high friction surface treatment) or the abrasion layer of asphalt mixture to replace or partly replace the existing aggregate. Bauxite clinker is classified into mainly six types according to different chemical composition contents. The selection of bauxite clinker as aggregate is not only for the economic value, but also for improving the adhesion between aggregate and asphalt, which has a certain blindness This study evaluated the characteristics of different types of bauxite clinker. The adhesion of different types of bauxite clinker with asphalt was evaluated by means of agitating hydrostatic adsorption method and surface free energy theory. The effect of characteristic parameters of bauxite clinker on adhesion was evaluated by grey correlation entropy analysis. The results show that Type B and D bauxite clinker aggregates have the best adhesion to asphalt. The outcome of grey entropy correlation analysis shows that the parameters which characterize the structural indexes of bauxite clinker, such as porosity, water absorption and apparent density, have the greatest effect on the adhesion. The results of study can provide some reference for the selection of bauxite clinker, which is used in different types of highway construction, and a theoretical reference for the applicability research of bauxite clinker in asphalt mixture and the improvement of skid resistance and durability of pavement.

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High Speed Skid Resistance and the Effects of Surface Texture on the Accident Rate

Skid Resistance of Highway Pavements ◽

10.1520/stp38895s ◽

2009 ◽

pp. 91-91-10 ◽

Cited By ~ 1

Author(s):

AB Moore ◽

JB Humphreys

Keyword(s):

Surface Texture ◽

High Speed ◽

Skid Resistance ◽

Accident Rate

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Optimizing Gradation Design for Ultra-Thin Wearing Course Asphalt

Materials ◽

10.3390/ma13010189 ◽

2020 ◽

Vol 13 (1) ◽

pp. 189 ◽

Cited By ~ 1

Author(s):

Wentian Cui ◽

Kuanghuai Wu ◽

Xu Cai ◽

Haizhu Tang ◽

Wenke Huang

Keyword(s):

High Temperature ◽

Asphalt Mixture ◽

Temperature Stability ◽

Wear Test ◽

Asphalt Mixtures ◽

Skid Resistance ◽

High Temperature Stability ◽

Functional Layer ◽

Rutting Resistance ◽

Road Surfaces

In recent years, ultra-thin wearing course asphalt mixture has been widely used in the reconstruction of old road surfaces and the functional layer of new road surfaces due to its good road performance. To improve the rutting resistance of ultra-thin wearing course asphalt mixture, this research presents an Ultra-thin Wearing Course-10 (UTWC-10) asphalt mixture with good high-temperature stability and skid resistance based on the Taylor system standard mesh specifications. The Course Aggregate Void Filling (CAVF) method is used to design the UTWC-10 asphalt mixture, which is compared with two other traditional ultra-thin wearing course asphalt mixtures on the basis of different laboratory performance tests. The high-temperature rutting test data shows that the rutting dynamic stability (DS) index of the UTWC-10 asphalt mixture is much higher than that of traditional wearing course asphalt mixtures, as it has better high-temperature stability. Moreover, anti-sliding performance attenuation tests are conducted by a coarse aggregate polishing machine. The wear test results show that the skid resistance of the UTWC-10 asphalt mixture is promising. The anti-sliding performance attenuation test can effectively reflect the skid resistance attenuation trend of asphalt pavement at the long-term vehicle load. It is verified that the designed UTWC-10 asphalt mixture shows excellent high-temperature rutting resistance and skid resistance, as well as better low temperature crack resistance and water stability than the traditional wearing course asphalt mixtures.

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Research Progress on Skid Resistance of Basic Oxygen Furnace (BOF) Slag Asphalt Mixtures

Materials ◽

10.3390/ma13092169 ◽

2020 ◽

Vol 13 (9) ◽

pp. 2169

Author(s):

Song Li ◽

Rui Xiong ◽

Jiahui Zhai ◽

Kaiyin Zhang ◽

Wenyu Jiang ◽

...

Keyword(s):

Material Properties ◽

Asphalt Pavement ◽

Asphalt Mixture ◽

Basic Oxygen Furnace ◽

Asphalt Mixtures ◽

Environmental Benefits ◽

Research Progress ◽

Skid Resistance ◽

Basic Oxygen ◽

Bof Slag

In order to ensure the safety of traffic, asphalt pavement is commonly required to utilize aggregates with excellent anti-abrasion property. This results in the lack of high-quality aggregates. The incorporation of solid waste in the aggregates is regarded as a high potential alternative for solving this problem. Since its material properties, such as rough surface, high Polished Stone Value (PSV) and the excellent adhesion property of asphalt, Basic Oxygen Furnace (BOF) slag can effectively improve the skid resistance of asphalt mixtures. First, the material properties of BOF slag are reviewed in this study. Then, the skid resistance of asphalt mixtures and aggregates are commendably evaluated by the Polished Stone Value test, Wehner/Schulze Tester, Aachen Polishing Machine, British Pendulum Test and Sand Patch test. The physical and mechanical properties of BOF slag play a key role in asphalt mixtures. This review found that the skid resistance mechanism of the BOF slag asphalt mixture is governed by factors such as BOF slag properties, incorporation methods and gradation types. Finally, the economic and environmental benefits of BOF slag asphalt mixtures were discussed. In addition, the function of gas catalysis and the melting of ice and snow can be added to the BOF slag asphalt mixture for a cleaner development in engineering. Furthermore, the existing problems, research directions and corresponding measures in this field are directed towards more durable and functional asphalt pavement construction.

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