Of gyratory compaction 1939 to 2001 by thomas harman, john bukowski, francis moutier, gerald huber, and robert mcgennis abstract history is a dynamic tapestry of facts and perceptions, dates and personalities. Compaction is achieved by the simultaneous action of static compression and the shearing action resulting from the mould being gyrated through an angle about its longitudinal axis. The troxler manual outlines the procedures for calibrating the ram pressure, angle of. The method achieves this by the application of a vertical. History is a dynamic tapestry of facts and perceptions, dates and personalities. Performances tests on bitumen and bituminous mixes. Apparatus superpave gyratory compactor sgc meeting the requirements of aashto t 312. Pine g2 superpave gyratory compactor for asphalt testing. Three models of gyratory compactor troxler 4141, pine 125x, and pine g2 were used to compact specimens. Twenty years ago, it all started in tom brovolds garage with an idea for a portable gyratory compactor. It is especially important to understand the safety warnings on page 12. The hm685s superpave gyratory compactor wshear measurement is an identical model, factoryequipped to measure and graph gyratory shear, the force required to gyrate the specimen. Superpave gyratory compactor is a high quality machine with which the user can easily and safely obtain accurate, repeatable results day after day. The afg2 is our next generation gyratory compactor.
Notwithstanding the advances that have been made in the art of gyratory compactors, there is a need for smaller and less costly designs. Citichic pxz gyratory crushers series ii citichic pxz series ii primary gyratory crushers offer a range of crusher sizes to suit the most demanding of applications in some of the worlds largest mining projects. Operation is much like the afg1 and the afg2 uses the same molds. Compress pdf files for publishing on web pages, sharing in social networks or sending by email. Tubular frame construction maintains angle of gyration. The servopac is a fully automated, servocontrolled gyratory compactor designed to compact asphalt mixes by means of the gyratory compaction technique. Gyratory compactor note before using the model 5850 gyratory compactor, carefully read this manual. Such compaction is achieved in a fully automatic way, by combining the rotary action and the. The compactor shall employ a means of continuously measuring and. Compaction is achieved by the application of a vertical stress normally 600kpa 87psi via end platens to a known mass of asphaltic mixture within a. The afg2 gyratory compactor models listed above conform to the directives and standards referenced above.
Ideal for onsite testing and mobile labs, this sgc can handle design and qcqa work with equal ease. Continuous positive feedback to maintain gyration angle precision throughout compaction. The internal diameter of the molds for each compactor were measured starting the bottom, and in 1. Model 4141 gyratory compactor note before using the model 4141 gyratory compactor, carefully read this manual. The right gyratory compactor for field qcqa and mix design lab work. The method achieves this by the application of a vertical stress, typically 600 kpa via platens to a mass of asphaltic mixture inside a 100 or 150mm diameter mould. Ldsy3 asphalt gyratory compactor this product simulates roller compaction of road surface by onsite vehicle loads for gyratory compaction of. The afgb is a completely selfcontained sgc that weighs only 304 pounds. The shrp superpave program uses specimen height from each gyration during the consolidation cycle as the basis for asphalt mix design. This gyratory compactor, entirely developed and manufactured by matest, is used to simulate and reproduce the real compaction conditions under actual road paving operations, hence determining the compaction properties of the asphalt. Gyratory compaction is considered to be one of the best methods of laboratory compaction for the assessment of compactibility and the manufacture of test specimens. The first, described in sections 3 and 4, was the development of a compaction procedure and the second, described in sections 5 and 6, was an evaluation of the compactors capa bility utilizing the procedure to fabricate nearly identical. Gyratory compactors shall provide the specified number of gyrations without additional compaction that may occur from squaring of the specimen or other compaction.
The most distinctive feature of the type r crusher is the builtin, oil filled hydraulic jack used for fast, positive change of crusher setting while crusher is operating. The strategic highway research program expended great effort in developing the superpave gyratory compactor sgc as a modern, technologically advanced tool for the design of hotmix asphalt hma paving mixtures and for preparation of realistic test specimens for laboratory evaluation. In this update of the dependable afg1 compactor, we have incorporated features that todays mix design laboratories need in a gyratory compactor while retaining the reliable performance of the afg1. Compacting specimens using the texas gyratory compactor. Gyratory compactor specifications the science of testing made easy the research specification servopac is a fully automated, servocontrolled gyratory compactor designed to compact asphalt mixes.
The afgb is a completely selfcontained gyratory compactor. Customers love the gb1 compactor for its portability and ruggedness. Gyratory compaction of asphalt bitimen mixture and concrete. Essentially, the gyratory crusher consists of a heavy castiron, or steel, frame which includes in its lower part an actuating mechanism eccentric and driving gears, and in its upper part a coneshaped crushing chamber, lined with wearresisting plates concaves. Ideal for onsite testing and mobile labs, this sgc can handle design and qcqa work. Compacting bituminous specimens using the superpave gyratory. Keep this manual in a safe place that is always easily accessible during the use of the. New requirements for superpave gyratory compactor molds. The hm687 brovold gyratory features integrated data logging functionality designed by pine to save or export data to a portable usb flash drive, or output directly to an optional pcl laser printer. The allischalmers type r small gyratory reduction crusher is designed for large capacity, fine crushing and incorporates many improvements over other gyratory type crushers previously manufactured by this company. Gyratory compactor, superpave, afg2, asphalt compactor. Select pdf files from your computer or drag them to the drop area. Pdf a gyratory crusher model and impact parameters related. The gb1 brovold gyratory compactor pine test equipment, inc.
Servo controlled superpave gyratory compactor grc20. The history and future challenges of gyratory compaction. S1 2360 hot mixed asphalt porous pavement combined 2360. Superpave gyratory compactor james cox and sons, inc. G5 labeled gyratory densification tables and curves, generated from the gyratory compactor, for all points used in the mixture submittal. Weighing 304 pounds, the gb1 brovold is completely selfcontained and. The model 4140b gyratory compactor is built to shrp specifications. Wsdot errata to fop for aashto t 312 asphalt mixture specimens by means of the superpave gyratory compactor waqtc fop for aashto t 312 has been adopted by wsdot with the following changes.
The model 4141 gyratory compactor shown in figure 11 and figure 12 provides safe, reliable gyratory compaction of asphalt specimens at a compaction pressure of 600 kpa, and a 1. Servo controlled superpave gyratory compactor grc20 selfheating molds for 4 and 6 diameter hot mix asphalt hma specimens. Grove city, pa 16127 724 458 6391 pine afg c125x pine afg1a rainhart co. After considerable research and effort, shrp researchers selected to use a gyratory compactor with operating protocols very similar to the french lcpc gyratory compactor. Pine gb1 superpave gyratory compactor for asphalt mix. Compacting specimens using the texas gyratory compactor tgc txdot designation. Request pdf discrete element modeling for the superpave gyratory compactor test of asphalt mixture. Servopac gyratory compactor 0002 2500 pine instrument company 101 industrial dr. When you right click on a group of selected image files and select print from the popup menu to access the print pictures dialog box as discussed in the. Up to ten completed tests are stored in the compactors internal memory, and data is also output to the two usb ports for flash drive and printer. Jun 22, 2015 ldsy3 asphalt gyratory compactor this product simulates roller compaction of road surface by onsite vehicle loads for gyratory compaction of asphalt mixtures in the test molds, in order to.
In addition the newdesign system introduced aggregate and binder requirements andmixture compactive effort tied to traffic. Pdf a gyratory crusher model and impact parameters. Gyratory compactor troxler electronic laboratories, inc. The selfcontained unit is lightweight and easily transported to remote sites or mobile labs. This reliable model is built by pine instruments and is ideal for both mix design and qcqa applications. Compaction is achieved by the application of a vertical stress normally 600kpa 87psi via end platens to a known mass of asphaltic mixture within a 150 and 100mm internal o mold.
Combined with high speed 600rpm and a range of eccentric. Refer to aashto t 312 and troxler model 4140 gyratory compactor instruction manual. Currentlythe superpave mixture design system is the predominately usedsystem in the us. This wasnt toms first rodeo he had spent many years developing and selling. Unlike other services this tool doesnt change the dpi, thus keeping your documents printable and zoomable. Nchrp report 478 relationship of superpave gyratory. Relationship of superpave gyratory compaction properties to hma rutting behavior national cooperative highway research nchrp program report 478 r r22 0. Compaction is achieved by the application of a vertical stress normally 600kpa via end platens to a known mass of asphaltic mixture within a 100 or 150mm internal o mould. Keep this manual in a safe place that is always easily accessible during the use of the model 4141. This compactor, forney la2123 controls ict 77b0252, was compared with the pine model afgc125x. One of the best methods of laboratory compaction is considered to be gyratory for not only the materials assessment of compactibility, but also the production of test samples. May 01, 2007 this study on the angle of gyration for superpave compactors was done to determine if there is a difference in the bulk specific gravity gmb and ultimately the volumetric properties when calibrating the compactors angle of gyration internally and externally. Superpave gyratory compactor was selected for use in mix design and quality control work in the superpave system. It consists essentially of a gyrating crushing head 521 working inside a crushing bowl 522 which is fixed to the frame 501.
The model 4141 provides significant improvements over other gyratory compactors in operator safety, machine durability. The rugged and proven brovold gyratory compactor is an industryleader for portability and ease of use when compacting hotmix asphalt specimens to superpave mix design requirements. Performing organization name and address texas transportation institute. The history of gyratory compaction purdue university. At that time, tom saw the growing adoption of superpave mix design, and the need for a gyratory that would meet the demands of both contractor and test lab. Analysis of contact model parameters this study established the ballbased and the clump.
Gyratory crusher traylor tph primary gyratory crushing plant. The gyratory compactor described therein includes a ram applying compressive force from one end of a cylindrical mold and gyrating the other end of the mold by rotating a base supporting the other end of the mold. Compacting specimens using the texas gyratory compactor tgc. Compaction is achieved by the simultaneous action of static compression and the shearing action resulting from the. Design of txdot asphalt mixtures using the superpave. Comparison between two models of superpave gyratory compactor for asphalt.
The g2 compacts material at a constant consolidation pressure, a constant angle of gyration, and a. In addition, gyratory compactor supply companies and manufacturers may be able to provide recommendations. The compactor shall tilt specimen molds at an angle of 1. A gyratory crusher model and impact parameters related to energy consumption article pdf available in minerals and metallurgical processing 243. This procedure covers preparing specimens, using samples of plant produced asphalt mixtures, for determining the mechanical and volumetric properties of asphalt mixtures in accordance with aashto t 31219. This method is not intended to specify a standard compactive effort in rcc mixture design, but rather to provide a. Superpave gyratory compactor internal angle of gyration study.
G6 percent and manufacturers data for type of stabilizer used. The compactor shall be designed to permit the specimen mold to revolve freely on its tilted axis during gyration. Superpave mix design and gyratory compaction levels. This project includes the evaluation of forneycontrols gyratory compactor. The results indicate that the bulk specific gravity g mb values from the candidate compactor are, on the average, comparable with those from the pine compactor. Spanning the crushing chamber across its top is a steadyrest spider, containing a machined journal which fixes the position of. The primary rock breaker most commonly used in large plants is the gyratory crusher, of which a typical section is shown in fig. With feed sizes up to 1200mm and capacities of 8000tph. The shrp superpave program uses specimen height from each gyration during. The compactor shall be verified at least once per year in accordance with aashto t 344. This work attempts to capture the events and rational of those who contributed significantly to the use of gyratory compaction. The data can be depicted as gyratory shear force vs. Pine gb1 superpave gyratory compactor for asphalt mix testing.
It produces asphalt specimens that best predict longterm pavement performance. Closedloop servo control of ram pressure and tilt angle. The sgc was created in the early 1990s to accurately represent inplace asphalt densities. The compactor evaluation was divided into two distinct phases. Discrete element modeling for the superpave gyratory. Just roll it into the bed of a pickup or into a minivan and take it anywhere. Research superpave gyratory compactor internal angle of.
The history and future challenges of gyratory compaction 1939. The procedure for creating a pdf file from multiple image files is the same in windows 7 and 8 as it is in windows 10 with one exception. Gyratory compactor to en 1269731, 10, astm d6925, shrp m002, aashto t312, inc. A study on volumetric versus surface properties of wearing courses. Berti vice president of engineering pine electronics, llc date of issue.
Gyratory compactors simultaneously use static compression and a shearingkneading action to compact asphalt mixtures. Transitioning from texas gyratory compactor to superpave gyratory compactor. The history and future challenges of gyratory compaction 1939 to 2001. The g2 is a customer favorite because it is userfriendly, reliable, durable, and well supported. Keep this manual in a safe place that is always easily accessible during the use of the model 5850.
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