Summary of the New Rutting Tests of China

2012 ◽  
Vol 193-194 ◽  
pp. 905-909
Author(s):  
Hao Liu ◽  
Hong Xin Guan ◽  
Zeng Jie Luo
Keyword(s):  
Working Condition ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Test Methods ◽  
Test Method ◽  
Asphalt Pavements ◽  
Simulation Test ◽  
Engineering Applications ◽  
Basic Principles ◽  
Development Direction

The asphalt pavement is the mainstream pavement structure of the expressway in our country. But it is investigated that rutting disease appeared even though the asphalt mixture was test qualified. With this instruction, the standard rutting test method has difficult in satisfying the complex working condition of asphalt pavement. In order to solve these, some new rutting test methods which are in accordance with privileged conditions have been proposed from theory and simulation test by many scholars’ deeper research, including lots of feasible methods. By summarized the new anti-rutting methods of asphalt pavements and described all kinds of basic principles and engineering applications, the deficiency of the new rutting test methods was pointed out and the development direction was proposed.

scholarly journals Long-Term Performance of Pavement Structures with Cold In-Place Recycled Base Course

2021 ◽  
Vol 16 (2) ◽  
pp. 48-65
Author(s):  
Audrius Vaitkus ◽  
Judita Gražulytė ◽  
Andrius Baltrušaitis ◽  
Jurgita Židanavičiūtė ◽  
Donatas Čygas
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Pavements ◽  
Recycled Asphalt ◽  
Binding Agents ◽  
Pavement Structure ◽  
Pavement Structures ◽  
Base Course ◽  
Surface Distress ◽  
Foamed Bitumen

Properly designed and maintained asphalt pavements operate for ten to twenty-five years and have to be rehabilitated after that period. Cold in-place recycling has priority over all other rehabilitation methods since it is done without preheating and transportation of reclaimed asphalt pavement. Multiple researches on the performance of cold recycled mixtures have been done; however, it is unclear how the entire pavement structure (cold recycled asphalt pavement overlaid with asphalt mixture) performs depending on binding agents. The main objective of this research was to evaluate the performance of cold in-place recycled asphalt pavements considering binding agents (foamed bitumen in combination with cement or only cement) and figure out which binder leads to the best pavement performance. Three road sections rehabilitated in 2000, 2003, and 2005 were analysed. The performance of the entire pavement structure was evaluated in terms of the International Roughness Index, rut depth, and pavement surface distress in 2013 and 2017.

scholarly journals Development of a Full-Depth Wheel Tracking Test for Asphalt Pavement Structure: Methods and Performance Evaluation

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Hui Wang ◽  
Zepeng Fan ◽  
Jiupeng Zhang
Keyword(s):  
Performance Evaluation ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Single Layer ◽  
Test Method ◽  
Shanxi Province ◽  
Wheel Tracking Test ◽  
Pavement Structure ◽  
Pavement Structures ◽  
Wheel Tracking

The rutting performance of asphalt pavement structure relies on the high temperature properties of asphalt mixture as well as the pavement structure and thickness. In order to investigate the influence of the structure and thickness, a full-depth wheel tracking test is developed in this research by improving the conventional wheel tracking test apparatus. The newly proposed test method is capable of varying its load speed and load size, controlling its specimen temperature gradient, and simulating the support conditions of actual asphalt pavement. The full-depth wheel tracking test based rutting performance evaluation of different asphalt pavement structures indicates that it is not reasonable to explain the rutting performance of asphalt pavement structure from the point of view of single-layer asphalt mixture rutting performance. The developed full-depth wheel tracking test can be used to distinguish rutting performance of different asphalt pavement structures, and two of five typical asphalt pavement structures commonly used in Shanxi Province were suggested for use in practical engineering.

New and Simpler Cracking Test Method for Asphalt Mix Designs

2017 ◽  
Vol 2631 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Soohyok Im ◽  
Fujie Zhou
Keyword(s):  
Field Performance ◽  
Cost Effective ◽  
Test Methods ◽  
Environmental Conservation ◽  
Test Method ◽  
Asphalt Pavements ◽  
Cracking Resistance ◽  
Cracking Behavior ◽  
Asphalt Mixes ◽  
Asphalt Mix

Because of environmental conservation and sustainability concerns, reclaimed asphalt pavements and recycled asphalt shingles are increasingly used in the asphalt paving industry to replace virgin asphalt and aggregate materials. However, these recycled materials are often highly aged and can cause cracking issues for asphalt pavements. Additionally, other factors such as binder additives, modifiers, and multiple warm-mix asphalt technologies can alter the performance of the mixtures both positively and negatively. The volumetric mix design alone is not sufficient for evaluating the potential cracking behavior of asphalt mixes. Although many cracking test methods are available, there is no widely accepted performance-related cracking test method that is practical enough for routine use in asphalt mix designs. This paper presents a newly developed, simple, and practical cracking test method for asphalt mix designs. The new cracking test method is repeatable, time- and cost-effective, easily implemented, sensitive to mix compositions, and well correlated to field performance. The new cracking test is performed at an intermediate temperature of 25°C and a loading rate of 50 mm/min. Furthermore, a unitless index is proposed as the cracking resistance indicator for evaluation of the cracking resistance of asphalt mixes. Additionally, the effectiveness of the new cracking test was validated with the test results from FHWA’s accelerated loading facility.

Laboratory Study on Cold-Mixtures for Asphalt Pavement

2012 ◽  
Vol 178-181 ◽  
pp. 1361-1364
Author(s):  
Shi Bin Ma ◽  
Li Jie Wang ◽  
Guo Qiang Zhang
Keyword(s):  
Laboratory Study ◽  
Asphalt Concrete ◽  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Test Methods ◽  
Recycled Asphalt ◽  
Concrete Mixtures ◽  
Mechanistic Analysis ◽  
Cleavage Strength

The main purpose of recycling is to reuse existing pavement material. First this paper reviews the necessary, feasibility and mechanistic analysis of recycled asphalt mixture, then summarizes the findings of a laboratory study to characterize and design recycled asphalt concrete mixtures using different tests. The laboratory tests carried out on the material were conventional test methods including unconfined compressive strength, cleavage strength, resilient modulus and shrinkage properties tests. The results of the laboratory can be taken as reference in design, engineering and further research．

scholarly journals Fundamental Approaches to Predict Moisture Damage in Asphalt Mixtures: State-of-the-Art Review

2020 ◽  
Vol 5 (2) ◽  
pp. 20 ◽  
Author(s):  
Hilde Soenen ◽  
Stefan Vansteenkiste ◽  
Patricia Kara De Maeijer
Keyword(s):  
State Of The Art ◽  
Asphalt Pavement ◽  
Flexible Pavements ◽  
Asphalt Mixture ◽  
Moisture Damage ◽  
Test Methods ◽  
Asphalt Mixtures ◽  
Moisture Susceptibility ◽  
The Individual

Moisture susceptibility is still one of the primary causes of distress in flexible pavements, reducing the pavements’ durability. A very large number of tests are available to evaluate the susceptibility of a binder aggregate combination. Tests can be conducted on the asphalt mixture, either in a loose or compacted form, or on the individual components of an asphalt pavement. Apart from various mechanisms and models, fundamental concepts have been proposed to calculate the thermodynamic tendency of a binder aggregate combination to adhere and/or debond under wet conditions. The aim of this review is to summarize literature findings and conclusions, regarding these concepts as carried out in the CEDR project FunDBits. The applied test methods, the obtained results, and the validation or predictability of these fundamental approaches are discussed.

Diaphragm Vulcanized Adhesion Test Method

1965 ◽  
Vol 38 (4) ◽  
pp. 791-801 ◽  
Author(s):  
C. E. Taylor
Keyword(s):  
Chemical Bonding ◽  
Test Methods ◽  
Test Method ◽  
Adhesion Test ◽  
Basic Principles ◽  
Mechanical Adhesion ◽  
Manufacturing Methods ◽  
Rubber Product ◽  
Laboratory Time ◽  
Equal Effectiveness

Abstract By using a rubber diaphragm as pressure transmitting medium, a cured adhesion test method has been developed which permits controllable curing pressures to be employed. The quest for a new adhesion test method was occasioned by lack of confidence in existing test methods with respect to reproducibility and correlation between testing sites. The diaphragm cures “hi place” with a minimum of rubber movement as compared to excessive press pressures which induce flow. Controllable vulcanizing pressures and temperatures permit accurate adhesion evaluation of individual components in the laboratory under conditions which closely approximate manufacturing methods. A prime goal has been evaluation of true chemical bonding and elimination of all possible mechanical adhesion contributions inherent in most rubber-product fabrications. The diaphragm pressure adhesion test can be used by Quality Control, Development, or Research Department as an accurate tool to evaluate the chemical adhesion potential of rubber and common reinforcing components. Since adhesion values are machine recorded, all laboratory time and error in tabulations and calculations are eliminated. Basic principles of the technique permit evaluation of chemical bonding of rubber to yarns, fibers, and cords with equal effectiveness.

scholarly journals The Influence of Aeolian Sand on the Anti-Skid Characteristics of Asphalt Pavement

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5523
Author(s):  
Jingsheng Pan ◽  
Hua Zhao ◽  
Yong Wang ◽  
Gang Liu
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Test Results ◽  
Aeolian Sand ◽  
The Road ◽  
Gray Correlation ◽  
Positive Linear Correlation ◽  
Sand Accumulation

The influence of sand accumulation on the skid resistance of asphalt pavement was studied. Many scholars have researched the anti-skid performance of conventional asphalt pavements. However, there is a lack of research on the anti-skid performance of desert roads under the condition of sand accumulation. In this study, AC-13 and AC-16 asphalt mixtures were used. The British Pendulum Number (BPN) under different sand accumulations was measured with a pendulum friction coefficient meter, and the Ames engineering texture scanner was used to obtain different sand accumulations. The texture index of asphalt mixture was used to study the macro and micro texture of asphalt pavement under different amounts of sand accumulation, and the degree of influence of different particle sizes on BPN was obtained through gray correlation analysis. The test results show that the presence of aeolian sand has a significant impact on the macro and micro texture of the asphalt pavement and will cause the anti-skid performance to decrease. Moreover, there is an apparent positive linear correlation between the road surface texture index and BPN. The research results may provide reference and reference for the design and maintenance of desert highways.

scholarly journals A Study on the Design Method for the Material Composition of Small Particle-Size Asphalt Mixture for Controlling Cracks in Asphalt Pavement

2019 ◽  
Vol 9 (10) ◽  
pp. 1988 ◽  
Author(s):  
Jiyu Xin ◽  
Jianzhong Pei ◽  
Mitsuyoshi Akiyama ◽  
Rui Li ◽  
Jiupeng Zhang ◽  
...  
Keyword(s):  
Particle Size ◽  
Crack Resistance ◽  
Small Particle ◽  
Performance Test ◽  
Design Method ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Material Composition ◽  
Asphalt Pavements ◽  
Small Particle Size

Generally, various kinds of cracks are the main type of distresses during the service period of asphalt pavements. To save maintenance costs and improve the crack resistance of asphalt pavements effectively, this paper presents a unique design method for the material composition of small particle-size (SPS) asphalt mixture for controlling cracks in asphalt pavement. First, Stone Mastic Asphalt (SMA)-II was designed as a basic gradation according to the A.N. Talbot curve and SMA-II-1, SMA-II-2 and SMA-II-3 were designed according to the Superpave mix design method, the Bailey method and the Particle interference theory, respectively. Second, based on Marshall test results, the optimal fiber content and optimal asphalt content of three gradations were determined. Then, the influence of the passing rate of 1.18-mm sieve and 0.075-mm sieve on the air voids of SMA-II and the influence of the filler-asphalt ratio on the performance of SMA-II were investigated, and an appropriate range of filler-asphalt ratio was obtained. Finally, a high-temperature performance test, a water stability test, and a skid resistance test demonstrate that the overall performance of SMA-II can satisfy the specifications. A low-temperature bend test and analysis of bending strain energy density show that SMA-II with a crumb rubber modifier and a polymer fiber has better crack resistance performance than SMA-I (SBS-modified mixture). Life-cycle cost analysis shows the economic advantage of SPS asphalt thin overlays over traditional AC-13 thin overlays.

A New Method to Measure the Gross Volume Density of the Asphalt Mixture Specimen - Brush Wax Method

2014 ◽  
Vol 505-506 ◽  
pp. 154-162
Author(s):  
Long Shi Peng ◽  
Min Gong ◽  
Lan Qiao
Keyword(s):  
Quality Control ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Volume Density ◽  
Test Method ◽  
The Other ◽  
New Method ◽  
Practical Significance ◽  
Technical Requirements

The gross volume density of mix asphalt material compacted specimen is a crucial indicator in the design of asphalt mixture and quality control of asphalt pavement, and it directly determines the asphalt aggregate ratio and the degree of compaction. It has a great practical significance to distinguish and choose the test method of gross volume density correctly. The specific aspects of the methods to determine gross volume density have been controversial. A new method named brush wax method is put forward for these issues. The density, priority, VMA and compactness of asphalt mixture were measured by different methods in the tests. By comparison of the new method and the other methods, the main technical indexes of asphalt mixture obtained by the brush wax method are the only one which greatly satisfies the technical requirements.

scholarly journals Application of Linear Viscoelastic Properties in Semianalytical Finite Element Method with Recursive Time Integration to Analyze Asphalt Pavement Structure

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Pengfei Liu ◽  
Qinyan Xing ◽  
Dawei Wang ◽  
Markus Oeser
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Asphalt Pavement ◽  
Time Integration ◽  
Asphalt Mixture ◽  
Small Strain ◽  
Asphalt Pavements ◽  
Computational Time ◽  
Fe Method ◽  
Element Method

Traditionally, asphalt pavements are considered as linear elastic materials in finite element (FE) method to save computational time for engineering design. However, asphalt mixture exhibits linear viscoelasticity at small strain and low temperature. Therefore, the results derived from the elastic analysis will inevitably lead to discrepancies from reality. Currently, several FE programs have already adopted viscoelasticity, but the high hardware demands and long execution times render them suitable primarily for research purposes. Semianalytical finite element method (SAFEM) was proposed to solve the abovementioned problem. The SAFEM is a three-dimensional FE algorithm that only requires a two-dimensional mesh by incorporating the Fourier series in the third dimension, which can significantly reduce the computational time. This paper describes the development of SAFEM to capture the viscoelastic property of asphalt pavements by using a recursive formulation. The formulation is verified by comparison with the commercial FE software ABAQUS. An application example is presented for simulations of creep deformation of the asphalt pavement. The investigation shows that the SAFEM is an efficient tool for pavement engineers to fast and reliably predict asphalt pavement responses; furthermore, the SAFEM provides a flexible, robust platform for the future development in the numerical simulation of asphalt pavements.

Sign in / Sign up

Export Citation Format

Share Document