Effectiveness of Double-Layer HDPE Geocell System to Reinforce Reclaimed Asphalt Pavement (RAP)-Base Layer
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Keywords:
Asphalt pavement
Resilience
Infill
Asphalt concrete
Fatigue cracking
Geogrid-reinforced asphalt pavement is a pavement type applicable to overlay for repair in addition to new construction. The geosynthetic materials are placed between the asphalt layers to stop or delay propagation of the cracking existing at lower layers and to reduce the rutting. In this study, the cracking, rutting, IRI, and deflection were investigated to compare the performance between geogrid-reinforced asphalt pavement and ordinary or polymer modified asphalt pavement. Based on field conditions, the 11 sections were classified into 3 groups; sections proper to compare, sections with restrictions to compare, sections with difficulties in comparing, and the data was statistically analyzed. Larger resistance to rutting and increased IRI were measured at the geogrid-reinforced asphalt pavement sections comparing to the ordinary or polymer modified asphalt pavement sections. However, the deflections of the pavements were similar and the resistance to the cracking could not be compared because of short pavement lives.
Geogrid
Asphalt pavement
Fatigue cracking
Asphalt concrete
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In analytical pavement design the two main criteria of pavement failure are fatigue cracking and permanent deformation. For permanent deformation the vertical strain at the bottom of the sub-base is held responsible whereas the horizontal strain between the bituminous and granular layers govern fatigue cracking. This paper investigates the generation of horizontal strain between the granular and bituminous layer of samples subjected to wheel-tracking tests. It examines the performance of traditional hot rolled asphalt in comparison to stone mastic asphalt. The process of measuring horizontal longitudinal strain in bituminous mixtures is outlined and results include graphs of strain measurement and rut depths. The improved rutting behaviour of SMA compared to HRA can be confirmed as well as a correlation of peak strain and rut depth development established. For the covering abstract see ITRD E107185.
Fatigue cracking
Asphalt pavement
Strain (injury)
Asphalt concrete
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ABSTRACT Longitudinal cracking has become increasingly common in asphalt concrete pavements worldwide since the introduction of modified bituminous binder to reduce rutting. This study extracted sample cores from two road sections (A and B, using a diamond cutter) from a motorway pavement which had been in service for five years and was showing no cracks (A) or longitudinal cracking on the surface (B). Further, cores for each layer of new and damaged sections were analyzed for the types of cracks using a newly developed micro-focus CT scanner (CT) and a three-dimensional (3D) crack analysis program and the study obtained failure limits (new concept) for each layer. The study found that the results can be applied to the pavement of both sections (A and B) in service, and that it is effective for a direct evaluation of pavement damage and can be applied to diagnose the degree of 3D damage in asphalt pavements.
Service life
Asphalt pavement
Asphalt concrete
Fatigue cracking
Water damage
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A result of the Strategic Highway Research Program's asphalt research is the development of performance-based specifications for asphalt binders and mixtures to control 3 distress modes: rutting; fatigue cracking; and thermal cracking. The SHRP A-005 project developed detailed pavement performance models to support these binder and mixture specifications and performance-based mixture designs. This report documents the findings of this extensive research effort and provides supporting data for the performance-based specifications and mixture design procedure called SUPERPAVE. The A-005 contract developed and used a sophisticated, mechanistic-based pavement performance model to define the relationships between asphalt binder and mixture properties and pavement distress. A comprehensive pavement performance model was developed that predicts the amount of fatigue cracking, thermal cracking and rutting in asphalt concrete pavements with time, using results from the accelerated laboratory tests. The pavement performance models for each distress were also used to confirm the relevant binder and mixture properties established by other SHRP contractors. The model has 3 parts: a mixture evaluation model; a pavement response model; and a pavement distress model.
Fatigue cracking
Asphalt pavement
Asphalt concrete
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The cold cracking of asphalt pavement has became a serious problem all over the world,reasons of asphalt pavement cold cracking are described in this paper,mainly including properties of asphalt and asphalt mix,thickness of asphalt surface,base conditions and climate changes etc..Technical ways for preventing asphalt pavement from cracking are also given.
Asphalt pavement
Fatigue cracking
Asphalt concrete
Road surface
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This paper conducts a thorough review of the literature on the feasibility and current state-of-the-art incorporation of basalt fiber (BF) into asphalt pavement materials, focusing on fiber characteristics, dosage, incorporation methods, mixture properties, and surface modification techniques. The optimum basalt fiber dosage should be determined based on engineering performance parameters such as asphalt type, fatigue cracking, thermal cracking, rutting, and moisture resistance of asphalt mixtures. Basalt fibers are added to asphalt mixes by dry method or mixed method to achieve better dispersion. Adding BF to asphalt mixtures increased performance characteristics like cracking resistance, rutting resistance, and fatigue resistance. Overall, incorporating BF into asphalt mixtures would lower costs while increasing pavement service life. More research is needed to fully understand the effects of different sizes of BF on pavement performance and the possible environmental and economic repercussions of fiber surface alteration.
Basalt fiber
Fatigue cracking
Asphalt pavement
Service life
Asphalt concrete
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Increasing the number of vehicles on the road quickly in which generates a large amount of waste tyres; it is a major concern of asphalt pavement distresses which causes permanent deformation this is results of the rapid development of economic and industrial nowadays. In order to solve this problem waste of tyres has been tried to use as utilization of bitumen modification to improve the performance of the asphalt pavement as well as for providing an environmentally friendly which is a green technology. The main aim of this literature is to evaluate the effect of polymer Modifier from previous researchers’ point of view on the performance of asphalt pavement in order to demonstrate the performance of Hot Mix Asphalt in terms of improving the significant flexible pavement deteriorations such as permanent deformation (rutting), fatigue cracking, and low temperature cracking (thermal cracking).
Asphalt pavement
Fatigue cracking
Environmentally Friendly
Asphalt concrete
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The effect of asphalt film thickness on low temperature cracking and rutting was investigated in a laboratory research program which considered: one aggregate, one asphalt cement type, one modifier, one stabilizer, two film thickness and two 85 degree C oven aging levels. Thermal stress restrained specimen tests (TSRST) and the French rutting tester were used to evaluate the low temperature cracking and rutting resistance of the asphalt concrete specimens. Minimum and maximum film thicknesses were chosen as 9 and 13 um, respectively, based on the Iowa Department of Transportation (IDOT) specification. At 13 um asphalt film thickness, excessive rutting occurred on unmodified mixtures and fracture temperature increased slightly with aging. The test results indicate asphalt film thickness is an important parameter to consider when designing mixes to resist low temperature cracking and rutting. Rutting is related with asphalt film thickness and minimized with a minimum asphalt film thickness. Asphalt film thickness does not have a significant effect on low temperature cracking when there is no aging. For the covering abstract see ITRD E117423.
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Several flexible pavement rehabilitation strategies incorporating asphalt-rubber were used experimentally on a project in northeastern California in the fall of 1983. Included were rubberized dense-graded asphalt concrete (AC) overlays containing a binder then being marketed by the Arizona Refining Company, PlusRide dense-graded AC overlays, and four thicknesses of conventional dense-graded AC overlay for comparative evaluations. Some of the rubberized dense-graded AC overlays were placed on a stress-absorbing membrane (SAM) interlayer. In addition, two sections of double SAM and one section of conventional (single) SAM were placed. Distress began to develop in the conventional dense-graded AC within one year in the form of raveling, rutting, and cracking. This distress has become more extensive and more severe during subsequent years. Distress has also developed in the other overlays and surface treatments. To date, however, all the asphalt-rubber combinations are performing equal to or better than equivalent or greater thicknesses of conventional dense-graded asphalt concrete.
Asphalt concrete
Fatigue cracking
Asphalt pavement
Wearing course
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Geogrid-reinforced asphalt pavement is a pavement type applicable to overlay for repair in addition to new construction. The geosynthetic materials are placed between the asphalt layers to stop or delay propagation of the cracking existing at lower layers and to reduce the rutting. In this study, the cracking, rutting, IRI, and deflection were investigated to compare the performance between geogrid-reinforced asphalt pavement and ordinary or polymer modified asphalt pavement. Based on field conditions, the 11 sections were classified into 3 groups; sections proper to compare, sections with restrictions to compare, sections with difficulties in comparing, and the data was statistically analyzed. Larger resistance to rutting and increased IRI were measured at the geogrid-reinforced asphalt pavement sections comparing to the ordinary or polymer modified asphalt pavement sections. However, the deflections of the pavements were similar and the resistance to the cracking could not be compared because of short pavement lives.
Geogrid
Asphalt pavement
Fatigue cracking
Asphalt concrete
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