The Use of Falling Weight Deflectometer in Asphalt Pavement Construction Quality Control

2009 ◽  
pp. 66-66-16
Author(s):  
SM Zaghloul ◽  
NA Saeed
Keyword(s):  
Quality Control ◽  
Asphalt Pavement ◽  
Falling Weight Deflectometer ◽  
Construction Quality ◽  
Pavement Construction ◽  
Falling Weight

scholarly journals Development of an Automated Remote Asphalt Paving Quality Control System

2018 ◽  
Vol 2672 (26) ◽  
pp. 28-39 ◽  
Author(s):  
Sicong Zhu ◽  
Xiangdi Li ◽  
Haoyang Wang ◽  
Dongxiao Yu
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Monitoring System ◽  
Asphalt Pavement ◽  
Implementation Process ◽  
Plant Production ◽  
Construction Quality ◽  
Aggregate Gradation ◽  
Automatic Data ◽  
Pavement Construction

The asphalt pavement construction monitoring system presented in this paper covers two main asphalt pavement construction processes: hot mix asphalt (HMA) plant production and the laydown and compaction operation. The main architecture of the monitoring system, the development of the required hardware and the software structure, and the implementation process are presented in this paper. The system is able to perform automatic data collection and data transmission, and can automatically provide feedback to the construction site for real-time asphalt pavement construction quality control. The entire process works automatically without much human intervention and covers the entire project throughout the entire construction period in real time. The monitoring system was successfully implemented in the ZhaoMa Highway construction project in China, where it proved to be effective and reliable. The key asphalt plant production parameters, including asphalt content and aggregate gradation, were improved to a statistically significant level as shown by comparing before and after the monitoring system’s deployment. Statistical analysis between asphalt core density and laydown and compaction monitoring data, collected at 20 locations, indicated that rolling passes were highly correlated with density, whereas finishing rolling temperature and HMA laydown temperature were moderately correlated with density. These results imply that implementation of the monitoring system proposed by this paper could improve asphalt construction procedure quality control and asphalt pavement construction quality.

scholarly journals Key Points of Construction Quality Control of SMA Asphalt Pavement

2017 ◽  
Vol 6 (3) ◽  
Author(s):  
Jun Wu
Keyword(s):  
Quality Control ◽  
High Temperature ◽  
Low Temperature ◽  
Asphalt Pavement ◽  
Excellent Performance ◽  
Construction Quality ◽  
Temperature Resistance ◽  
Key Points ◽  
Pavement Construction ◽  
Temperature Crack

<p>Compared with ordinary pavement, SMA pavement structure not only has a good high temperature resistance to rutting and low temperature crack resistance, but also has excellent performance, such as seepage resistance, anti-skid, fatigue and durability, so it is widely used for SMA asphalt pavement and the supervision of the work also gradually standardized. In this paper, through the example of SMA asphalt pavement construction quality supervision of Sui-Yue-Zhong Expressway, the main points of SMA asphalt pavement construction quality control are introduced.</p>

Study on the Design and Construction Quality Control of AC-13 Rubber Asphalt Pavement

2017 ◽  
Vol 753 ◽  
pp. 310-314
Author(s):  
Xiao Hu Wu ◽  
Jin Yan ◽  
Miao Miao Tian ◽  
Dai Song Luo
Keyword(s):  
Quality Control ◽  
Material Selection ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Control Measures ◽  
Raw Material ◽  
Construction Quality ◽  
Mix Proportion ◽  
Exploratory Stage ◽  
Pavement Construction

In recent years, as a new type of asphalt mixture, rubber asphalt mixture has a lot of excellent road performance, and is being widely used, but the rubber asphalt quality control measures are still in the exploratory stage. How to control the quality of rubber asphalt pavement, and provide technical support for more and more rubber asphalt pavement construction is particularly important. This article mainly analyzes and summarizes from raw material selection of rubber asphalt mixture, mix proportion design of rubber asphalt mixture and measures of construction quality control, forming a set of construction quality control technology of rubber asphalt pavement

Development and Application of Asphalt Pavement Construction Quality Control System

2011 ◽  
Vol 135-136 ◽  
pp. 428-435
Author(s):  
Tao Jing ◽  
Hai Feng Yan ◽  
She Peng Ji
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Control System ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Field Application ◽  
Construction Quality ◽  
Pavement Testing ◽  
Pavement Construction ◽  
Non Destructive

As an important part of the asphalt pavement construction, quality control is directly related to the life of road. In view of the non-uniformity issues in asphalt mixture production and construction processes, depending on the segregation standards in asphalt pavement testing, the universal volumetric chart is used to control the asphalt mixture’s volume indexes in this paper. And a PQI (pavement quality indicator) is used to make a non-destructive inspection of the pavement density. Finally, the controlling and monitoring system from asphalt mixture production to asphalt pavement construction and applying software with asphalt pavement construction quality control and quality assurance in the platform of MATLAB are developed in this paper. According to the field application, the system and software developed in this paper could be well used in the asphalt pavement construction quality control.

Effectiveness of static and dynamic backcalculation approaches for asphalt pavement

2020 ◽  
Vol 47 (7) ◽  
pp. 846-855
Author(s):  
Dandan Cao ◽  
Changjun Zhou ◽  
Yanqing Zhao ◽  
Guozhi Fu ◽  
Wanqiu Liu
Keyword(s):  
Asphalt Concrete ◽  
Elastic Moduli ◽  
Complex Modulus ◽  
Asphalt Pavement ◽  
Falling Weight Deflectometer ◽  
Fixed Frequency ◽  
Dynamic Approach ◽  
Layer Effect ◽  
Static Approach ◽  
Falling Weight

In this study, the field falling weight deflectometer (FWD) data for asphalt pavement with various base types were backcalculated through dynamic and static backcalculation approaches, and the effectiveness of backcalculation approaches was studied. Asphalt concrete (AC) was treated as a viscoelastic material and the complex modulus was obtained using the dynamic approach. The dynamic modulus at a fixed frequency was computed for comparison purposes. The coefficient of variance and the compensating layer effect were assumed as two characteristics for the effectiveness of backcalculation approaches. The results show that the layer property from the dynamic backcalculation approach for different stations were more consistent and showed smaller coefficient of variance, which were more appropriate for the characterization pavement behavior. The elastic moduli from the static approach were more variable and exhibited a compensating layer effect in which a portion of the modulus of one layer was backcalculated into other layers. The dynamic approach is more effective than static approaches in backcalculation of layer properties.

Interpretation of Transverse Profiles to Determine the Source of Rutting within an Asphalt Pavement System

2005 ◽  
Vol 1905 (1) ◽  
pp. 73-81 ◽  
Author(s):  
Claude Villiers ◽  
Reynaldo Roque ◽  
Bruce Dietrich
Keyword(s):  
Surface Layer ◽  
Literature Review ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Falling Weight Deflectometer ◽  
Relative Contribution ◽  
Transverse Profile ◽  
Falling Weight ◽  
Different Sources

The transverse profilograph has been recognized as one of the most accurate devices for the measurement of rut depth. However, interpretation of surface transverse profile measurements poses a major challenge in determining the contributions of the different layers to rutting. A literature review has shown that the actual rutting mechanism can be estimated from a surface transverse profile for determination of the relative contribution of the layers to rutting. Unfortunately, much of the research yielded no verification or data. In addition, some techniques presented cannot be used if the rut depth is not well pronounced. Other techniques may be costly and time-consuming. The present research developed an approach that integrates ( a) falling weight deflectometer and core data along with 3.6-m transverse profile measurements to assess the contributions of different pavement layers to rutting and ( b) identifies the presence (or absence) of instability within the asphalt surface layer. This approach can be used regardless of the magnitude of the rut depth. On the basis of the analysis conducted, absolute rut depth should not be used to interpret the performance of the asphalt mixture. In addition, continued instability may not result in an increase in rut depth because the rutted basin broadens as traffic wander compacts or moves the dilated portion of the mixture. The approach developed appears to provide a reasonable way to distinguish between different sources of rutting. The conclusions drawn from analysis of the approach agreed well with observations from the trench cuts taken from four sections.

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