Two-Lift Paving - Pavement Equipment Suppliers
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1 Two-Lift Concrete Paving Equipment Perspective Two-Lift Paving Workshop University of Texas 23 May 2013
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A Two-Lift concrete Paving (2LCP) workshop was organized as a part of the Texas Department of Transportation (TxDOT) project 0-6749: Feasibility Study of Two-Lift Concrete Paving (2LCP). This workshop was conducted at the J. J. Pickle Research Campus (PRC), The University of Texas at Austin, Austin, TX on May 23rd, 2013. Dr. Jiong Hu, Texas State University, Research Supervisor, and Dr. David Fowler, The University of Texas at Austin, Co-Research Supervisor, co-chaired the workshop. The workshop offered the option of attending in person or remotely through webinar. Fifty-one attendees were present remotely or in person; 28 in person and 23 persons remotely.
Transcript of Two-Lift Paving - Pavement Equipment Suppliers
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Two-Lift Concrete PavingEquipment Perspective
Two-Lift Paving WorkshopUniversity of Texas
23 May 2013
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Two-Lift Concrete Paving Two-Lift Paving idea has been around for decades. GOMACO did tests to insert dowels into two layer
concrete in early 1990 through about 1996 while working on development of paver to produce two-lift pavement with single machine.
In late 1993 two-lift demonstration for European style pavement in Detroit using a two paver process.
European opportunities for single machine two-lift pavers. Two-Lift paving using “Smog Eating Concrete” in 2011 Next up is the Illinois Toll Way project.
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Two-Lift Concrete Paving Founder of GOMACO filed the
first patent in January 1976 Abstract: “A machine for
concurrently laying a dual-layered cementitious composition on a base surface with the layers having different compositions.”
“EconoCrete” was the anticipated market.
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Two-Lift Concrete PavingMachine design included two paving chambers for the two different layers of material
planned for the “EconoCrete” pavement design
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Two-Lift Concrete Paving
Cross section of machine patented at the time
At that time, cost of producing two mix designs for a single project outweighs savings to be gained by using a lesser quality concrete on the bottom layer
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Two-Lift Concrete Paving With eye on European
market, GOMACO began testing dowel insertion through two layers of concrete placed by single machine in early 1990s.
Developed vibration techniques for IDBI, bottom course structure as well as top course.
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving 1993 two-lift project in Detroit Two paver process, and two side delivery
placers because of doweled and jointed construction
Surface was complete with high quality exposed aggregate. Referred to as European two-lift
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving
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Two-Lift Concrete PavingEuropean 2-Lift paving spread
Conveys top lift concrete over the bottom layer paver
Inserts load transfer dowels into bottom layer
Places and vibrates top course after placing dowels
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving 1997, GOMACO had opportunity to
produce machine for two-lift paving on a project near Newport, Wales in the U.K.
CRCP pavement with “Whisper” surface top course
Single lane construction, 4-lane highway Machine had ability to insert dowels in the
pavement but never used on this project.
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving Contractor used continuous wet batch plant
to produce both mix designs Job site logistics (including public traffic)
proved to be important consideration on the project
Two different types of trucks delivering materials for top and bottom course helps prevents mixing loads into the wrong layer
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving In 2004 Skanska purchases a 12 meter paver for
producing two-lift pavements in Czech Republic (First project was paved at just over 10 Meters wide)
Paver was equipped with IDBI as well as two layer paving kit.
First paver ever working in Czech Republic on full 3D machine control
Contractor used two separate batch plants to produce material for two courses
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Two-Lift Concrete Paving Trucks delivered material
in three lanes
Two outside truck lanes were for delivering bottom course material
Middle lane trucks were delivering the top course material
No stringlines present to hinder truck traffic
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving2-lift paving w/ “Smog Eating” ConcreteMissouri DOTOctober 2011
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Two-Lift Concrete Paving
Research Project involving MoDOT, CPTech Center, FHWA, & EPA
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Two-Lift Concrete Paving
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Two-Lift Concrete Paving Next up will be the Two-lift paving project
being done by the Illinois Toll Way authority.
Open House on August 20th and 21st
sponsored by the Illinois Toll Way and National Concrete Pavement Technology Center.
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THANK YOU
THE WORLD WIDE LEADER IN CONCRETE PAVING TECHNOLOGY
Kevin L. KleinV.P. ENGINEERING / RESEARCH & DEVELOPMENT
GOMACO CORPORATION121 E. HWY 175, P.O. BOX 151
IDA GROVE, IOWA [email protected] 1-800-831-2320
