Analysis on the Main Influencing Factors and Guarantee Measures of Asphalt Concrete Surface Durability in V4 Area

The objective of this paper is to provide information from multiple perspectives on the current state of the practice with regard to using recycled materials and recycling agents (RAs) in asphalt concrete mixtures. This information was collected through a survey of U.S. transportation agencies and RA suppliers combined with a search of RA-related specifications and pilot projects previously constructed. Moreover, a case study describing the Virginia Department of Transportation’s experience with RAs provides a tangible example of how at least one agency is approaching the potential implementation of these technologies. This practice review was achieved by documenting the experience, lessons learned, and best practices of multiple asphalt experienced contractors and asphalt binder suppliers in the Virginia area. This paper follows a similar survey conducted in 2014 as part of NCHRP 09-58 and provides a second look at the use of RAs across North America. Not all state departments of transportation have experience with using RAs. Factors preventing the use of RAs included specification limitations, lack of expertise in processing recycled materials, supporting data, and negative prior experiences. Developing a performance-based testing framework is mandatory for the successful use of RAs. In general, good and frequent communication with the RA supplier is critical and necessary during the planning stages, the production of mixtures, and the continuous quality control by the supplier to resolve issues when they arise. Finally, a strong quality control and quality assurance-testing program should be implemented to ensure that materials meet the properties needed to produce a good-performing mixture.

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Full-Scale Evaluation of Relatively Thin Airfield Pavements

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198120939099 ◽

2020 ◽

Vol 2674 (10) ◽

pp. 658-669

Author(s):

W. Jeremy Robinson ◽

Jeb S. Tingle ◽

Carlos R. Gonzalez

Keyword(s):

Asphalt Concrete ◽

Test Section ◽

Concrete Surface ◽

Full Scale ◽

Test Items ◽

Pavement Structures ◽

Base Course ◽

And Performance ◽

Rutting Behavior ◽

Aggregate Base

A full-scale airfield pavement test section was constructed and trafficked by the U.S. Army Engineer Research and Development Center (ERDC) to evaluate the performance of relatively thin airfield pavement structures. The test section consisted of four test items that included three asphalt pavement thicknesses and two different aggregate base courses. The test items were subjected to simulated aircraft traffic to evaluate their response and performance to realistic aircraft loads. Rutting behavior, instrumentation response, and falling weight deflectometer response were monitored at selected traffic intervals. It was found that the performance of the airfield pavement sections were most sensitive to aggregate base course properties, where a 50% reduction in base course strength resulted in a 99% reduction in allowable passes. The data suggested that when sufficient asphalt thickness is not provided, the failure mechanism shifted from subgrade failure to base course failure, particularly at higher subgrade CBR values. In addition, the number of aircraft passes sustained was less than that predicted by current Department of Defense (DOD) methods that include assumptions of a high-quality aggregate base and a minimum asphalt concrete thickness. The results of this study were used to extend existing DOD pavement design and evaluation techniques to include the evaluation of airfield pavement sections that do not meet the current criteria for aggregate base quality and minimum asphalt concrete surface thickness. These performance data were used to develop a new base failure design curve using existing stress-based design criteria.

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Evaluation of pavement temperature on skid frictional of asphalt concrete surface

International Journal of Pavement Engineering ◽

10.1080/10298436.2010.501864 ◽

2011 ◽

Vol 12 (1) ◽

pp. 47-58 ◽

Cited By ~ 5

Author(s):

Saeed Ghaffarpour Jahromi ◽

S. Mohammad Reza Mortazavi ◽

Shahram Voussough ◽

Luo Yingjian

Keyword(s):

Asphalt Concrete ◽

Concrete Surface ◽

Pavement Temperature

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Design and Study of Multi-Function Asphalt Mixture Shear Apparatus

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.2397 ◽

2010 ◽

Vol 97-101 ◽

pp. 2397-2402

Author(s):

Tao Zhang ◽

Yang Liang ◽

Nan Yao

Keyword(s):

Asphalt Concrete ◽

Shear Force ◽

Bridge Deck ◽

Asphalt Mixture ◽

Data Acquisition System ◽

Concrete Surface ◽

Uniform Loading ◽

Experimental Parameters ◽

Asphalt Concrete Pavement ◽

Bridge Deck Pavement

The shear force created by non-uniform loading on the asphalt and concrete surface is the main reason why bridge deck pavement is damaged extensively. Multi-function asphalt mixture shear apparatus is designed for dealing with this problem. After studying the composition of mechanical system and data acquisition system, design and develop the program of the system. During the study, the actual prototype is produced, and used in the asphalt mixture shear experiment. The experimental parameters can help the design of asphalt mixture and the prevention of the damage of asphalt concrete pavement.

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IMPROVING THE METHODS OF MILLING GAUGE ON HIGHWAYS

NEWS of National Academy of Sciences of the Republic of Kazakhstan ◽

10.32014/2021.2518-170x.67 ◽

2021 ◽

Vol 447 (3) ◽

pp. 87-93

Author(s):

R.A. Kozbagarov ◽

N.C. Kamzanov ◽

Sh.D. Akhmetova ◽

K.A. Zhusupov ◽

Zh.Kh. Dainova

Keyword(s):

Asphalt Concrete ◽

Coating Layer ◽

Asphalt Pavement ◽

Concrete Surface ◽

Road Transport ◽

Layer By Layer ◽

Auxiliary Equipment ◽

Crushed Material ◽

The Road ◽

The Republic

Machines for milling asphalt concrete surfaces appeared on the highways of the Republic of Kazakhstan about ten years ago. Before that, the replacement of the old asphalt pavement took place under the deafening crack of jackhammers. Road cutters made it possible to replace this outdated technology with profiling of asphalt concrete surface. This type of work consists in removing the asphalt coating layer by cold milling. Typical characteristics of the road milling cutter: working speed of 5-7 m /min, sufficient power, traction and stability to ensure accurate maintenance of the working depth from 3.5 mm to 5 cm; automatic leveling system using a leveling beam or string; automatic control of the milling depth using guide slides; the ability to maintain a given transverse slope; auxiliary equipment for the selection of crushed material (asphalt granulate) at a given processing speed; the width of the working area of the milling strip is 2-4 m. Profiling of old asphalt pavement is an automatically controlled process of cold milling it to restore a given transverse and longitudinal profile, remove bumps, potholes, wear zones, as well as other coating defects, and as a result, obtain a surface that allows for the immediate start of movement or the laying of a fresh coating. Modern road cutters allow you to plan the old coating, texture its surface, giving it the lost coupling and noise protection properties, remove the old coating layer by layer (with an accuracy of up to mm) or immediately to the full depth, carefully open the places of laying underground pipelines and communication lines, release the old coating manholes and even level concrete floors in industrial premises. In this paper, this problem is supposed to be solved by presenting the road cutter as an automated road transport and technological manipulator operating in generalized technological coordinates for the repair of road surfaces with variable track age and due to the transition from elastic (power) to rigid (coordinate) closure of the technological scheme for milling track gauges.

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ROAD SURFACE OF THE PAVEMENT COATING BRIDGE

Bulletin of Belgorod State Technological University named after V G Shukhov ◽

10.34031/2071-7318-2021-6-4-21-35 ◽

2021 ◽

Vol 6 (4) ◽

pp. 21-35

Author(s):

M. Vysotskaya ◽

A. Kurlykina ◽

D. Kuznecov ◽

A. Tkacheva

Keyword(s):

Asphalt Concrete ◽

Concrete Surface ◽

Operational Reliability ◽

Road Surface ◽

Structural Defects ◽

Self Healing ◽

Concrete Mixtures ◽

Bridge Structures ◽

The Rich ◽

Materials Used

The current topic of the reliability of bridge structures in modern conditions and the role of the structural layers of the roadway (road surface) in increasing and maintaining their operational reliability and durability are considered. The existing standard designs of road surface clothing and the materials used for their arrangement are considered. The analysis and systematization of information from Russian and foreign sources on the construction of the clothing of the driving road indicates the prospects and technical and operational advantages of using cast asphalt concrete mixtures in the upper layers of the bridge pavement. It is noted that an effective road surface made of this material is capable of resisting existing loads, taking into account the specifics of the operation of the asphalt concrete surface during the established service life, additionally performing the protective waterproofing function of the metal structures of the bridge structure. The analysis of the literature demonstrates that active scientific research on the development and creation of effective cast asphalt concrete mixtures is primarily associated with the production and modification of its bituminous part, as a medium capable of initiating "self-healing" of the composite, independently eliminating structural defects. The rich experience of various methods of modifying bituminous binders, accumulated over the past few decades, allows to predict the prospects for using cast asphalt concrete in the construction of the roadway of bridge structures, based on improved binders, in order to create new high-quality materials that can improve the quality of the bridge network in the country.

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The Correlation Between the Statistical Pass-By Index Values and the Total Number of Vehicle Passes

Civil and Environmental Engineering ◽

10.2478/cee-2021-0057 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Martin Decký ◽

Eva Remišová ◽

Matej Brna ◽

Marek Drličiak ◽

Matúš Kováč

Keyword(s):

Asphalt Concrete ◽

Sound Pressure ◽

Traffic Noise ◽

Concrete Surface ◽

Sound Level ◽

Asphalt Pavements ◽

Degradation Model ◽

Mastic Asphalt ◽

Sound Levels ◽

Vehicle Velocity

Abstract In this study, the traffic noise degradation in asphalt pavements was analysed using the ‘Statistical Pass-By method’. The sound levels of two surfaces were monitored during 9 and 12 years of service, respectively. By comparing the dependencies of the maximum A-weighted sound pressure level on logarithm of vehicle velocity, an increase in the sound level was found at all recorded speeds. Following an analysis of sound levels, as combined with the statistical pass-by index (SPBI) calculated versus age (expressed in vehicles), it was determined that the noise is an increasing power function of SPBI values on vehicle passes, based on an approximation of noise level adjustment to a reference temperature of 20 °C (using a coefficient of 0.06 for asphalt concrete surface AC11 and - 0.03 for mastic asphalt SMA11). The adjusted traffic noise degradation model showed that the SMA11 surface has a higher resistance to acoustic degradation than AC11 surface.

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Efficiency Evaluation of Concrete Surface Treatment

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.272.9 ◽

2018 ◽

Vol 272 ◽

pp. 9-14

Author(s):

Jakub Řepka ◽

Tomáš Vlach ◽

Lenka Laiblová ◽

Tereza Pavlů ◽

Michal Ženíšek ◽

...

Keyword(s):

Evaluation Method ◽

Weather Conditions ◽

Concrete Surface ◽

Efficiency Evaluation ◽

Technical Standards ◽

Surface Protection ◽

Testing Procedures ◽

Original Surface ◽

Surface Durability ◽

Concrete Elements

This paper presents the simplified method of efficiency evaluation of surface protection products for concrete elements. This evaluation method was designed to consist of as few testing procedures as possible and to use as few specimens as well. Several testing processes most of which were based on the European technical standards were used to compare five commercially available products. Those comparisons served to assess whether the chosen method has sufficient informative value and does not require a disproportionate amount of time and money. The main examined properties were impact on color and reflectivity of the original surface, durability of the coating in extreme weather conditions, wettability of the surface and amount of labor needed for its maintenance. All of these experiments were optimized so that they could be performed on one type of specimen.

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Lincoln Avenue Reclaimed Asphalt Pavement Base Project

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198196154700113 ◽

1996 ◽

Vol 1547 (1) ◽

pp. 89-95 ◽

Cited By ~ 15

Author(s):

Navneet Garg ◽

Marshall R. Thompson

Keyword(s):

Asphalt Concrete ◽

Laboratory Testing ◽

Asphalt Pavement ◽

Base Material ◽

Field Performance ◽

Concrete Surface ◽

Performance Data ◽

Reclaimed Asphalt ◽

Concrete Production ◽

Pavement Base

Pavement rehabilitation and reconstruction operations have generated large supplies of reclaimed asphalt concrete (RAC). In Illinois crushed RAC generally called recycled asphalt pavement (RAP) supplies are not 100 percent recycled into hot-mix asphalt concrete production. RAP acceptance as a pavement base material has been limited because of the lack of laboratory testing information, information on structural behavior, and field performance data. Limited preliminary laboratory testing and isolated commercial and local road agency paving experience in Illinois indicate that RAP has significant potential as a pavement base. RAP base potential was evaluated by constructing the Lincoln Avenue (Urbana, Illinois) demonstration project during late September and early October 1993. The pavement section is a 305-mm (12-in.) lime-modified, fine-grained subgrade, a 203-mm (8-in.) compacted RAP base, and a 76-mm (3-in.) dense-graded asphalt concrete surface course. The construction, structural response, and performance of the Lincoln Avenue RAP base project were monitored as part of a cooperative study (Illinois Department of Transportation, City of Urbana, and University of Illinois). The accumulated construction, field testing and evaluation, and laboratory testing data and information are summarized. The field construction experience, field control test data, laboratory testing results, falling weight deflectometer results, and Lincoln Avenue performance data indicate that RAP can successfully be used as a conventional flexible pavement base material. The performance of the Lincoln Avenue RAP base pavement (to date) is comparable with that of a crushed stone base.

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Microwave Deicing Efficiency: Study on the Difference between Microwave Frequencies and Road Structure Materials

Applied Sciences ◽

10.3390/app8122360 ◽

2018 ◽

Vol 8 (12) ◽

pp. 2360 ◽

Cited By ~ 5

Author(s):

Longting Ding ◽

Xuancang Wang ◽

Wengang Zhang ◽

Shuai Wang ◽

Jing Zhao ◽

...

Keyword(s):

Finite Element ◽

Simulation Model ◽

Microwave Heating ◽

Asphalt Concrete ◽

Great Influence ◽

Microwave Frequency ◽

Concrete Surface ◽

Cement Concrete ◽

Microwave Frequencies ◽

The Difference

A method of deicing using microwave heating is proposed to make scientific and economical road deicing in a cold area, and to make up for deficiencies in the existing methods for melting snow and ice. This paper proposes to define microwave deicing efficiency as the heating rate of a concrete surface when heated to 0 °C (the efficiency of deicing is equal to the difference divided by heating time, which is between 0 °C and the initial temperature at the junction of ice and concrete). Based on the mechanism of microwave heating and deicing, a method combining the finite element simulation model with indoor experiments was proposed to study the deicing efficiency of microwaves, and the effects of different microwave frequencies and different road structure materials on microwave deicing efficiency were analyzed. The results show that the microwave frequency and road structure materials have a great influence on microwave deicing. For asphalt concrete, the ice melting efficiency of 5.8 GHz is 4.31 times that of 2.45 GHz, but the heating depth is less than that of 2.45 GHz. At 2.45 GHz, the melting efficiency of cement concrete is 3.89 times that of asphalt concrete. At 5.8 GHz, the melting efficiency of cement concrete is 5.23 times that of asphalt concrete. Through the consistency of the simulation and experimental results, the validity of the simulation model based on the finite element theory is verified. The results provide theoretical guidance and a practical basis for future applications of microwave deicing.

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