Effects of construction cracks on the design of asphalt pavements

1994 ◽  
Vol 21 (3) ◽  
pp. 410-418 ◽  
Author(s):  
A. O. Abd El Halim ◽  
A. G. Razaqpur ◽  
A. H. El Kashef
Keyword(s):  
Finite Element ◽  
Field Tests ◽  
Fatigue Tests ◽  
Asphalt Pavements ◽  
Steel Wheel ◽  
Asphalt Mix ◽  
Pavement Structures ◽  
Stress Fatigue ◽  
Long Term Performance ◽  
Term Performance

Compaction of asphalt mix has been recognized as one of the most important factors that affect the long-term performance of the pavement. Problems experienced in compacting asphalt mixes have generally been ascribed to the mix. Roller "checking," the result of compaction with steel rollers, has been disregarded or considered as irrelevant. Compaction based on a new concept, using a soft plate, avoids roller checking, as demonstrated by a series of side-by-side field tests with steel and pneumatic rollers. The surface cracks initiated by the steel wheel roller may provide an explanation for the often reported phenomenon of early deterioration of asphalt pavements. Finite element analyses of pavement structures with roller-induced cracks have shown significantly higher tensile stresses than the corresponding stresses in otherwise identical uncracked pavements. The analytical findings are supported by indirect tensile and stress fatigue tests results obtained in the laboratory from asphalt samples compacted in the field. The test samples were recovered from pavements compacted either by existing compaction equipment and technique or by the new soft plate method. Key words: asphalt, crack, compaction, fatigue, finite element, tensile strength testing, pavement.

scholarly journals Effect of a dual tire pressure on the design parameters of thick asphalt pavements using finite element freeware

DYNA ◽  
2016 ◽  
Vol 83 (196) ◽  
pp. 194-203
Author(s):  
Myriam Rocío Pallares Muñoz ◽  
Julián Andrés Pulecio-Díaz
Keyword(s):  
Finite Element ◽  
Analytical Methods ◽  
Asphalt Pavement ◽  
Field Tests ◽  
Asphalt Pavements ◽  
Design Parameters ◽  
Future Research ◽  
Tire Pressure ◽  
The Cost ◽  
Cost Of Construction

<p>The effect of a dual tire pressure on the design parameters of thick asphalt pavements using finite element freeware EverStressFE©1.0 is evaluated. This is trying to represent more adjusted the footprint shape and intensity of stress generated by the tires of vehicles. To validate the elastic multilayer EverStress©5.0 software was used. The results of the deformations can be concluded that the asphalt pavement designs made with analytical methods may be slightly oversized and consequently increase the cost of construction of pavements. This study marks a route to analyze the sensitivity of various factors that may affect the design of asphalt pavements. Future research is expected to integrate dynamic conditions by introducing results of field tests to full scale.</p>

Study of Longitudinal-Joint Construction Techniques in Hot-Mix Asphalt Pavements

1996 ◽  
Vol 1543 (1) ◽  
pp. 106-112 ◽  
Author(s):  
Prithvi S. Kandhal ◽  
Rajib B. Mallick
Keyword(s):  
Density Gradient ◽  
Hot Mix Asphalt ◽  
Conventional Technique ◽  
Asphalt Pavements ◽  
Joint Construction ◽  
Construction Techniques ◽  
Longitudinal Joint ◽  
The Face ◽  
Long Term Performance ◽  
Term Performance

There is a need to identify suitable longitudinal-joint construction techniques for multilane, hot-mix asphalt pavements that can minimize or eliminate cracking at the joint and raveling adjacent to the joint. It is believed that the longitudinal cracks result primarily from the density gradient that is usually encountered across the joint. This density gradient can be attributed to low density at the unconfined edge when the first lane is paved and relatively high density at the confined edge when the adjacent lane is paved. Seven different longitudinal-joint construction techniques were used on I-25 in Colorado in 1994, including various rolling procedures to compact the joint, provision of a vertical face with a cutting wheel, and use of rubberized asphalt tack coat on the face of the unconfined edge. Two longitudinal-joint construction techniques were used on I-79 in Pennsylvania in 1994: the conventional technique (control) and the New Jersey–type wedge joint. The latter technique uses a 3:1 taper at the unconfined edge of the first lane. The face of the taper is heated with an infrared heater before the adjacent lane is placed. Pavement cores were taken on the joint and 305 mm (1 ft) away from the joint for density measurements in all experimental test sections. Different techniques for joint construction have been ranked on the basis of statistical analysis of all density data. Various joints were also evaluated visually by teams of at least four engineers in June 1995. The performance, or ranking, of the joints in both Colorado and Pennsylvania projects after one winter seems to have been influenced by the overall density at the joint. The joints with high densities indicate better performance than those with relatively low densities. These rankings may change in the future on the basis of the long-term performance as measured by cracking and raveling.

scholarly journals Long-Term Settlement of High Concrete-Face Rockfill Dam by Field Monitoring and Numerical Simulation

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Xinjie Zhou ◽  
Xinjian Sun ◽  
Junxing Zheng ◽  
Haoyuan Jiang ◽  
Yongye Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Creep Deformation ◽  
Deformation Behavior ◽  
Finite Element Software ◽  
Rockfill Materials ◽  
Stress And Deformation ◽  
Long Term Performance ◽  
Term Performance ◽  
Concrete Face

High concrete-face rockfill dams (CFRDs) with heights of over 100 m have been quickly developed in recent years. The self-weight of rockfill materials causes creep deformation of the dam body. However, the creep analysis method of high CFRDs in finite element software is few, and sometimes, it can also not reflect the long-term performance of high CFRDs well. Therefore, it is necessary to carry out the secondary development in finite element software. This study developed a subroutine that can run in Finite Element Method (FEM) platform ABAQUS to simulate long-term creep deformation behavior of the rockfill materials more accurately. Then, a displacement back-analysis for parameters, based on the Xujixia high CFRD project, is performed by the neural network response surface method (BP-MPGA/MPGA). Remarkable agreements are observed between simulation and field monitoring results. The calibrated FEM model is used to predict stress and deformation behavior of the Xujixia high CFRD after three years of operation period. The result indicates that rockfill creep deformation has a significant impact on stress and deformation of the high CFRD during the operation. This research may predict long-term performance using FEM in the design stage for high CFRDs.

A new test method for evaluating the long-term performance of fiber-reinforced concrete pipes

2019 ◽  
Vol 23 (7) ◽  
pp. 1336-1349 ◽  
Author(s):  
Fouad T Al Rikabi ◽  
Shad M Sargand ◽  
Issam Khoury ◽  
John Kurdziel
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Steel Reinforcement ◽  
Fiber Reinforced Concrete ◽  
Synthetic Fiber ◽  
Concrete Pipes ◽  
Concrete Pipe ◽  
Long Term Performance ◽  
Term Performance

Synthetic fibers have been used recently to minimize the need for steel reinforcement in the concrete pipe to enhance their ductility. However, synthetic fiber has properties that may change over time due to its viscoelastic behavior. The objective of this study is to investigate the long-term performance of fiber-reinforced concrete pipes using a new test frame. A three-dimensional finite element model was created for the long-term testing frame to ensure its compliance with the American Society for Testing and Materials requirement. The finite element results showed that the testing frame successfully transferred the load to the concrete as the pipe cracked at the location where high flexural stresses are expected. Concrete pipe reinforced with synthetic fiber dosage of 9 kg/m3 along the steel reinforcement area of 5.7 cm2/m was tested to evaluate the concrete pipe system performance. The pipe was tested under two load stages for 120 days each. Load stages 1 and 2 included applying 40% and 70% of the ultimate load obtained by the authors in a previous study, respectively. The strain and deflection increased linearly within 5 days of applying the load and then leveled off. The pipe showed a slight increase in the crack width and deflection, indicating that fiber creep did not have a significant impact on the long-term performance of the concrete pipe. Also, it was observed that strain values surpassed those for plain concrete material, suggesting that including synthetic fiber in the concrete pipe mix enhanced the pipe ductility.

Evaluation of the long-term performance and life cycle costs of GTR asphalt pavements

2016 ◽  
Vol 114 ◽  
pp. 261-268 ◽  
Author(s):  
Munir D. Nazzal ◽  
Md. Tanvir Iqbal ◽  
Sang Soo Kim ◽  
Ala R. Abbas ◽  
Moses Akentuna ◽  
...  
Keyword(s):  
Life Cycle ◽  
Asphalt Pavements ◽  
Life Cycle Costs ◽  
Long Term Performance ◽  
Term Performance

Long-term Performance of Fiber Grid Reinforced Asphalt Pavements Overlaid on Old Concrete Pavements

2017 ◽  
Vol 19 (3) ◽  
pp. 31-43
Author(s):  
Ju Myeong Lee ◽  
Seung Beom Baek ◽  
Kang Hoon Lee ◽  
Jo Soon Kim ◽  
Jin Hoon Jeong
Keyword(s):  
Asphalt Pavements ◽  
Concrete Pavements ◽  
Long Term Performance ◽  
Term Performance

Field Tests of a PV-Powered Air Monitoring System

2003 ◽  
Vol 125 (2) ◽  
pp. 203-206 ◽  
Author(s):  
L. Sanidad ◽  
Y. Baghzouz ◽  
R. Boehm ◽  
E. Hodge
Keyword(s):  
Field Tests ◽  
Computer Code ◽  
Test Site ◽  
Weather Data ◽  
Nevada Test Site ◽  
Air Sampler ◽  
Long Term Performance ◽  
Solar Resource ◽  
Term Performance

A compact stand-alone PV power system was recently designed and built to run an air sampler for environmental monitoring at the Nevada Test Site. This paper presents an overview of the system design and analysis of some of the recorded daily cycles of various power flows during the summer period. The system long-term performance during both high and low solar resource periods is simulated with the computer code PVFORM using historical weather data.

scholarly journals Advantages Of Filler And Surfactant Additive To Improve Moisture Sensitivity Of Hot Mix Asphalt Mixtures.

2021 ◽  
Vol 1202 (1) ◽  
pp. 012011
Author(s):  
Asres Simeneh ◽  
Alamrew ◽  
Konrad Mollenhauer
Keyword(s):  
Tensile Strength ◽  
Mineral Composition ◽  
Hydrated Lime ◽  
Moisture Sensitivity ◽  
Bituminous Mixtures ◽  
Asphalt Mix ◽  
Indirect Tensile ◽  
Surfactant Additive ◽  
Long Term Performance ◽  
Term Performance

Abstract This research investigated the effect of mineral composition of aggregate on moisture sensitivity of bituminous mixtures and explored the benefits of hydrated lime filler and Wetfix BE surfactant additive to improve the resistance of the mix against moisture sensitivity. Basalt, quartzite, and limestone aggregates were selected based on their different mineralogy and 70 -100 penetration graded bitumen binders used during the study. Four laboratory tests the rolling bottle, shaking abrasion, pull-off tensile strength and indirect tensile strength tests were applied to study the effects of aggregate minerals and benefits of hydrated lime and Wetfix BE. Statistical analysis using Two-way ANOVA test conducted for each test to check the outcome significance. Results from each test revealed that mineral composition of aggregate have significant effects on the moisture resistance performance of bituminous mixtures and hydrated lime filler and Wetfix BE surfactant additives have advantages to improve the performance of bituminous mixture against moisture sensitivity and improves the long-term performance of asphalt mix.

Pavement Evaluation for ERS Steel Deck Pavement Using Accelerated Loading Test

2017 ◽  
Vol 744 ◽  
pp. 97-104
Author(s):  
Fei Chen ◽  
Ke Zhong ◽  
Xiao Hao Wei
Keyword(s):  
Steel Bridge ◽  
Loading Test ◽  
Pavement Evaluation ◽  
Loading System ◽  
Loading Tests ◽  
Pavement Structures ◽  
Long Term Performance ◽  
Term Performance ◽  
Steel Deck

In order to verify the practical application of ERS steel deck pavement system, based on the project of Jia Shao bridge, the pavement accelerated loading system is used to test the long-term performance of the steel bridge deck pavement. Tests find that the absolute value of the average rut growth depth of ERS and ERN is less than 5mm when the number of axle loads is 2.05 million times. After more than 1.3 million loading tests, the two deck pavement structures are almost impermeable to water and their anti-skid properties also tend to be stable. The results show that ERS and ERN are not cracked under natural conditions and have excellent anti-rutting performance.

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