Laboratory wheel tracking devices figure 1 are used to run simulative tests that measure hma qualities by rolling a small loaded wheel device repeatedly across a prepared hma specimen. Wma technology has demonstrated to have beneficial economic value as well as environmental value in other parts of the united states and. Engineering services for the asphalt industry wheel tracking test standardization hamburg aashto t324, hamburg wheeltrack testing of compacted hot mix asphalt hma asphalt pavement analyzer aashto tp63 determining the rutting susceptibility of hot mix asphalt using the asphalt pavement analyzer apa. Caterpillar 246c, 256c, 262c, 272c, 277c, 287c, 297c service learning pdf. The rutting resistance of multilayer asphalt overlay was researched by using laboratory wheel tracking test. Use of georgia loaded wheel tester to evaluate rutting of.
In general, the deeper rut depth is obtained from the weaker mixture, resulting in the lower ds value. The effects of loading level and test temperature on rutting resistance of asphalt overlay structure were evaluated by means of multilayer specimens. The wheel tracker large device crtwtenld supersedes the french pavement rutting tester by using a unique instrumented measurement device, linked to the data acquisition, to measure the development of rutting during testing. The test data is exportable and can be opened in excel or any other text editor. The intent of this bulletin is to provide guidance on how to address these two issues. Review and analysis of hamburg wheel tracking device test data. The implementation of warm mix asphalt wma is becoming more widespread with a growing number of contractors utilizing wma technologies to take advantage of reduced mixing and compaction temperatures, reduced fuel consumption and improved compactability.
May 12, 2011 the tests that are used in the uk to assess deformation resistance of asphalt mixtures by simulation from wheel tracking have changed in recent years with the introduction of european standards. In this study, the influences of binder type, binder content, aggregate grading, temperature and loading are evaluated by means of a wheel tracking test. The device measures the rut depth in the sample continuously during the test. Hamburg wheel tracking test txdot uses specimens molded in the sgc or 6 cores cut from the pavement 10 cores can also be used 50 cycles per minute, wheel tracking test for asphalt pavement structure. Article information, pdf download for more practical wheel tracking test for rutting. Laboratory wheel tracking devices pavement interactive. This section covers asphalt concretesurfaced pavements acp, including acp overlays on either asphalt concrete ac or portland cement concrete pcc pavements. Pdf development of a fulldepth wheel tracking test for asphalt. The hm459 asphalt pavement analyzer apa by pavement technology is a three wheel, multifunction asphalt wheel tracker for accurate evaluation of rutting, fatigue cracking and moisture susceptibility of hot and cold asphalt mixes. The hamburg wheel tracking device hwtd test tex242f and the. There are three basic types of asphalt pavement rutting.
Development of a fulldepth wheel tracking test for asphalt. The wheel tracking test a form of a loaded wheel tester is widely used for evaluating permanent deformation of asphalt mixtures 104. Search and free download all ebooks, handbook, textbook, user guide pdf files on the internet quickly and easily. The hm459 asphalt pavement analyzer apa by pavement technology is a threewheel, multifunction asphalt wheel tracker for accurate evaluation of rutting, fatigue cracking and moisture susceptibility of hot and cold asphalt mixes. The hamburg wheel tracking device hwtd tests rut resistance by tracking a loaded steel wheel back and forth across an asphalt pavement sample. Hot asphalt is the type of asphalt that you mostly see when driving past a construction crew. This european standard describes test methods for determining the susceptibility of bituminous materials to deform under load. Designed for multiple uses ikos type 1 asphalt is an. In 2000, the hamburg wheel test was initially implemented in texas for heavy duty type mixes that were designed to be used on high traffic volume roadways. Both models meet requirements for aashto t 324 hamburg, t 340 apa rut test, and other wheel tracking tests. Pdf evaluation of hamburg wheeltracking device test with. Bituminous mixtures test methods for hot mix asphalt part 22. Determination of valid dynamic stability in wheel tracking test of asphalt concretes.
Sma, sup, aka, modified binder, highviscosi ty modified asphalt, wheel tracking test, circular track test 1. These deformations are usually found in the wheel track on roads carrying heavy, slow moving, channeled traffic, such as in the city and industrial areas at traffic light junctions. Trackers are used for accurate evaluations of rutting, fatigue cracking and moisture susceptibility for hot and cold asphalt mixes. Effect of aggregate gradation on rutting of asphalt concrete by using. The asphalt layer may include a variety of mixtures e. In comparison with multilayer tests, standard specimens of various layers were also conducted to. The alf, french pavement rutting tester, hamburg wheel tracking device, georgia loaded wheel tester, an unconfined repeated load compression test, and six superpave shear tester measurements ranked the five 19. In recent years, rutting damage has appeared in many asphalt surfaces.
The literature search has shown that a number of devices have been used to more directly determine the susceptibility of a given mix to rutting. This results in the load, being carried by the asphalt cement rather than aggregate structure. For most academic and educational uses no royalties will be charged although you are required to obtain a license and comply with the license terms and conditions. Index validation of asphalt binder and mixture tests. Pdf on jan 1, 2006, qing lu and others published evaluation of hamburg. Cat 72h pipelayer operation and maintanence manual. The new european standards for asphalt comprise two families of standards.
Initial hamburg specification values in 2000, the hamburg wheel test was initially implemented in texas for heavy duty type mixes that were designed to be used on high traffic volume roadways. By repeating this for thousands of cycles, it simulates the effect of traffic loading on the pavement over time. Attaches over existing pin in ductilometer without tools or machine. In the first phase of this study, the researchers built several test sections that were constructed using different asphalt mixtures and various compaction methods. Performance tests for rutting pavement interactive. The traffic testing of asphalt pavements in a washington state university test track provided an opportunity to explore the fatigue mode of failure in asphalt pavements.
As illustrated in figure 22, this type of pavement is surfaced with asphalt and is supported by stabilized andor unstabilized base and subbase layers. Asphalt wheel trackers by pavement technology are multifunction loaded wheel testers. Rutting rates increased with the application of higher levels of stress, however, they reduced with. Asphalt testing equipment automatic lengthen wheel track tester with three wheels gd0719c, find complete details about asphalt testing equipment automatic lengthen wheel track tester with three wheels gd0719c, wheel tracking tester,bitumen wheel tracking tester, asphalt wheel rutting tester from testing equipment supplier or manufacturerchongqing gold. Forced determination h2267 h2266 force determination adapter and digital indicator provides precise tensile strength measurement of any material, preparation, procedure or type of test to an accuracy of 0. Pdf evaluation of aashto t 324 hamburgwheel track device test. The development of new technologies and road pavement materials require the evaluation of the asphalt mixture performance. A specification value test vrlat and wessex wheel tracking wtt test 1. We have recently innovated wheel tracker large device and added two new exciting features.
At the napa education lu and isacsson found that although optimum asphalt content was higher for the modified mixtures than the unmodified mixtures, modified mixtures revealed more resistance to permanent deformation in lcpc wheel tracking test. Development of a fulldepth wheel tracking test for. Hamburg wheel tracking test hwtt aashto t 324 overlay tester ot tex248f three asphalt binder contents are used. Typically, 120 psi 827 kpa is used for the hose and 120 lb 534 n is used for the load. Superpave mixes, especially mixes containing reclaimed asphalt pavement. January 2019 standard method of test for hamburg wheel track testing of compacted hot mix asphalt hma. The wheel tracking and loading system applies wheel loading with controlled magnitude and contact pressure on beam or cylindrical samples for rut testing, moisture testing, or hamburg type testing. The bars are nominally 50mm long, 12mm wide, and 10mm thick. Calibration and test set up of the asphalt pavement analyzer 3. Suggestions are made as to the most effective selection of a particular type of asphalt for a specific situation, consideration being given to functions, properties and performance. The moulded specimens are inserted and removed from the wheel tracker using an easyload system. Asphalt 8 vs asphalt xtreme alps track copy test wrx orik. Cat th360b telehandler operator and maintanence manual. Presentation delivered during the calapa fall asphalt pavement conference oct.
Analysis of styrenebutadienestyrene polymer modified. January 2019 standard method of test for hamburg wheeltrack testing of compacted hot mix asphalt hma. Significance test for unm and nmdot hamburg wheel tracking devices. As a result, testing against the new bs en test method will be carried. Stabilize the test chamber at the desired temperature. Advanced asphalt technologies, llc engineering services for the asphalt industry fracture energy standardization diskshaped compact tension astm d73, standard test method for determining fracture energy of asphaltaggregate mixtures using the diskshaped compact tension geometry indirect tension draft, but no aashto or astm. In 1990, members of the federal highway administration participated with other industry and highway agencies in a european asphalt study tour to examine pavement technology. One transversal side of the steel frame holding the specimen is made of transparent glass in order to take. A test program was conducted to evaluate the applicability of the testing procedure and to develop correlations between the rutdepth of asphalt mixes using the beam samples and the gyratory samples.
Distress identification manual for the ltpp fourth revised. This technical brief provides an overview of a fatigue characterization test method that can be conducted using an asphalt mixture performance tester ampt device. Evaluation of rutting resistance of asphalt pavements by. Iko asphalt type 1 is a proven waterproofing material and is suitable for use in selected damp proofing or waterproofing applications. Dynamic stability ds in the wheel tracking wt test is used as a basic index of rutresistance for asphalt mixtures. The rutting performance of asphalt pavement structure relies on the high temperature properties of asphalt mixture as well as the pavement structure and thickness.
Distresses for pavements with asphalt concrete surfaces. Determination of valid dynamic stability in wheel tracking. Investigation of conditions for moisture damage in asphalt. Download a pdf of precision estimates of aashto t 324, hamburg wheel track testing of compacted hot mix asphalt hma by the national. The test procedure and conditions are controlled and data acquired using windows software running on a host computer via a high speed digital interface and signal conditioning system.
May be decreased or waived when shown on the plans. Wheel tracking tests have seen a vast increase in usage among various. The test is conducted using rectangular bars of mix, which are cut from either field cores or gyratorycompacted hma specimens with a diamondtipped saw. Set the hose pressure and load cylinder pressure to the desired levels. Laboratory wheel tracking apparatus for bituminous. Rutting evaluation of dense graded hot mix asphalt mixture. A hotmix asphalt hma mixture performance test has been developed using a constant stress dynamic shear rheometer. Presentation by jack van kir, director of asphalt technology, george reed inc. Introduction with the increase of traffic and heavy vehicl es, bleeding and rutting are the most commonly observed forms of pavement distress on roads. Pdf forms are currently not compatible with mobile or apple ios devices. This includes a description of the test as well as an introduction to how the test has evolved, what. Evaluation of aashto t 324 hamburgwheel track device test article pdf available in construction and building materials 114. A multistress repeated loading test msrlt based on flwt wheel tracking device as according to jtg e202011 standard, was used to simulate the application of an actual wheel load on an asphalt pavement.
Unpacking and installing the asphalt pavement analyzer 2. Do not hold the samples at elevated temperature form more than 24 hours prior to testing. Pdf the rutting performance of asphalt pavement structure relies on the high temperature. Ah70 means the type of asphalt typically used in heavily loaded roads classified by the penetration grade. Two phases of the test were defined to evaluate the rutting resistance of different pavements. Methods and performance evaluation huiwang, 1 zepengfan, 1 andjiupengzhang 2 key laboratory of highway construction and maintenance technology of ministry of transport in loess region. Userfriendly reporting software to generate a hamburg wheeltracking graphs and data at desired user defined interval. It was found that the modified binders have considerable. Available in bulk processed under strict quality control standards in ikos own oxidizing vessels, the product is available in bulk liquid. The test is applicable to mixtures with upper sieve size less than or equal to 32 mm. Multistress loading effect on rutting performance of asphalt. Click here to obtain permission for precision estimates of aashto t 324, hamburg wheeltrack testing of compacted hot mix asphalt hma.
An ebook is one of two file formats that are intended to be used with ereader devices. Regardless of the type of antistrip treatment chosen by the contractor, the hma must meet the requirements of aashto t 283, standard method of test for resistance of compacted hotmix asphalt hma to moistureinduced damage, and aashto t 324, standard method of test for hamburg wheel track testing of compacted hot mix asphalt hma. Load axial test vrlat and wessex wheel tracking wtt test 1. Wheel tracking testing on ac20 limestone asphalt mixtures was carried out to determine the effect of multistress loading on rutting development. In comparison with multilayer tests, standard specimens of various layers were also conducted to evaluate the rutting resistance. Study of the rutting resistance of asphalt surfacing mixtures. This versatile model complies with aashto methods t 234 hamburg test with solid wheels and aashto t 340 apa rut test with.
Wheel tracker large device cooper research technology. Rutting resistance of asphalt overlay with multilayer wheel. Unitracker single wheel tracking apparatus one stop. New wheel tracking test to analyze movements of aggregates in. Upper layer sbsmodi ed negrainedtype asphalt concrete ac. The effectiveness of the hamburg wheel tracking device hwtd test to determine moisture sensitivity of asphalt mixes was evaluated by testing both laboratoryfabricated specimens and field cores. Asphalt testing equipment automatic lengthen wheeltrack. Observations of 8foot wide pavements surviving 247,000 applications of a dual wheel load weighing 10,600 lbs. Autocad 2011 sample files visualization aerial dwg 716kb visualization condominium with skylight dwg 83kb visualization conference room dwg 951kb visualization sun and sky demo dwg 540kb autocad 2010 sample files architectural annotation, scaling and multileaders dwg 185kb architectural example imperial dwg 145kb blocks and tables. This versatile model complies with aashto methods t 234 hamburg test with solid wheels and aashto t 340 apa rut. Autocad sample files autocad 2011 autodesk knowledge. Pdf comparison between flat rubber wheeled loaded wheel. The new standard allows either a small or a large device to be used depending on the maximum axle load being designed for. Rotating steel bed system, tracking speed, 42 passmin.
Matest wheel tracker performs the test as per procedures a and b 6 or 2 tests, clearly specified by the en standard. Practical wheel tracking test for rutting resistance of asphalt. Wheel tracking devicean electrically powered device capable of moving a steel wheel. Its testing results permanent deformation could be. Multistress loading effect on rutting performance of. The hwtd was developed in germany to predict rutting potential of hma. Rutting resistance of asphalt overlay with multilayer. Warmmix asphalt, wma, rediset, accelerated pavement testing, heavy vehicle simulator proposals for implementation. Rutting is one of the main modes of failure of asphalt mixtures. The appendix for this report contains two excel files that are available from.
There are also different varieties of these asphalts for summer and winter use. Some of the en test methods will change, eg wheel tracking, where the method used is dependant on the material being tested and a different format is used for reporting the results of ac and sma. Idot pdf forms can be opened directly when using internet explorer. One of the technologies brought back from this tour was laboratory wheel tracking devices. However, no work has been performed in correlating field performance to test results produced from the hamburg wheel tracking device test. To and our investigation into the nature of pavement rutting, a laboratory wheel tracking apparatus was used to simulate channeled wheel traffic loading under.
Evaluating ruttingstripping potentials of asphalt mixes using. On the other hand, the shallower rut depth is obtained from the stronger mixture, resulting in the higher ds. Asphalt technology ramtech asphalt institute lab testing procedure resistance to rutting permanent deformation. Precision estimates of aashto t 324, hamburg wheeltrack. Laboratory wheel tracking apparatus for bituminous pavement. The wheel tracking test has proven to be feasible alternative in evaluating rutting and test results can be used as predictive measures to analyze the performance of hma mixture in road conditions 2. Txdot also includes a maximum indirect tensile strength. In order to investigate the influence of the structure and thickness, a fulldepth wheel tracking test is developed in this research by improving the conventional wheel tracking test apparatus. Traditional techniques for preparation of asphalt concrete specimens for the purposes of mixture design, quality control, and research activities in the united states have, for the most part, utilized the marshall hammer or the california kneading compactor. Investigation of sustainable pavement technologies evaluating.
The hamburg wheeltracking device hwtd was originally devel. Select test types with most potential to be used to evaluate mixes to estimate performance of hma. Less than optimum binder contents also reduce the moisture resistance of asphalt mixes under repeated loading. To perform the test, a wheel tracking apparatus is used to simulate the effect of traffic and to measure the deformation susceptibility of the bituminous sample. Hamburg wheel trackers loaded wheel tester gilson co.
Distress identification manual for the ltpp fourth revised edition chapter 1. The fulldepth wheel tracking test based rutting performance evaluation of different asphalt. Wheel tracking rutting performance estimation based on. Pdf on jan 1, 2006, qing lu and others published evaluation of hamburg wheeltracking device test with laboratory and field performance data find, read and cite all the research you need on. Testing for fatigue cracking in the asphalt mixture. Dec 15, 2007 asphalt technology ramtech asphalt institute lab testing procedure resistance to rutting permanent deformation. Methods and performance evaluation huiwang, 1 zepengfan, 1 andjiupengzhang 2 key laboratory of highway construction and maintenance technology. Pdf development of feasible dynamic stability in wheel.
This study aimed to conduct a comprehensive evaluation of compaction of asphalt pavements and develop software for monitoring field compaction in real time. Testing for fatigue cracking in the asphalt mixture performance tester. The wheel tracking tests of asphalt mixtures were carried out according to the trrl procedures at a temperature of 60c, a load pressure of 0. Performance of the test specimen is then correlated to actual inservice pavement performance.