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400-401 - dot.state.oh.us
The compaction of asphalt concrete mixes is currently governed by one of two types of specifications. A method specification is used for some asphalt concrete (301, 302, and 448 by 2005 specification and older), while most mix types (446 and 448 by 2008 specification and newer) are governed by a density requirement ( 446.05 and 448.03 ).
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Compaction of Hot Mix Asphalt Concrete
Compaction is the process by which the asphalt and aggregate are compressed into a reduced volume. For HMAC this process is achieved by rolling the upper surface of each layer of the asphalt concrete with various types of rollers during construction, or by pneumatic tired vehicles (traffic) after construction.
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Factors affecting asphalt compaction | Asphalt magazine
The goal in compacting an asphalt mix is to produce a smooth, stable and durable asphalt pavement. Understanding the factors affecting compaction is an important step in achieving this goal. Jim Scherocman is a consulting engineer specializing in asphalt pavement design and construction. He can be reached at (513) 489-3338.
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CB7 Asphalt Compactor | |
The ® CB7 asphalt compactor offers enhancements that simplify operation, provide versatility, and deliver excellent fuel economy. Rotary dials, oscillatory vibration, and 360º seating make this compactor a perfect match for urban streets, highways, and other intermediate-type applications.
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Compaction and Measuring Pavement Density – Pavement ...
In asphalt pavement construction, it's "compaction, compaction, compaction." In this edition of the RoadReady newsletter, we will focus on measuring the density of a pavement and therefore how well it was compacted, as well as examining the challenges around to obtaining proper compaction.
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Asphalt Pavement Construction - Asphalt Institute
While there are an infinite number of questions that can be asked, we compiled a list of those questions that have been directed to us the most. These FAQs are categorized into subject areas listed in the contents drop-down box below. We tried to keep both the questions and answers concise. Additional information is referenced … Continue reading Asphalt Pavement Construction
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Road Standards and Paving Standards
Road Standards and Paving Standards. ASTM's road and paving standards provide the specifications and test methods pertinent to the material, physical, mechanical, performance, and application requirements of road surfaces and pavements. These geotechnical surfaces are laid down on specified areas intended to sustain either or both foot and ...
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Compacting Hot Mix Asphalt Pavements: Part I | Roads & Bridges
The compaction process causes the asphalt-concrete mix to be compressed and its volume reduced. As the density of the hot-mix asphalt material increases, the air-void content of the mix decreases (they are inversely proportional to each other). Properly designed, a HMA mix should have an air-void content in the range of 3% to 5%. ...
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F 21 CMM - 461 Compaction and Density of Asphalt Pavement
461 Compaction and Density of Asphalt Pavement 461.1 General Compaction of the asphaltic pavement or surface is geared to achieving the required density and ride qualities. The contractor is responsible for mixture design, quality control of the production of the mix, and attainment of required pavement density.
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Improving pavement density | Asphalt magazine
Mike Anderson, Director of Research for the Asphalt Institute, estimates "on a typical six-lane interstate with a ten-year rehabilitation cycle, compaction specification changes can yield a 3 to 5 percent decrease in the life-cycle cost of pavement rehabilitation." Here is an illustration from an Asphalt Institute lab compaction study:
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SECTION 02513 ASPHALT CONCRETE PAVING
F. "Relative compaction" is the ratio, expressed as a percentage, of the inplace dry density to the laboratory maximum dry density. G. Compaction shall be deemed to comply with the Specifications when no more than one test of any three consecutive tests falls below the specified relative compaction…
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Soil Compaction Handbook - Multiquip Inc
Types of compaction There are four types of compaction effort on soil or asphalt: Vibration Impact Kneading Pressure Soil Compaction Soil compaction is defined as the method of mechanically increasing the density of soil. In construction, this is a significant part of the building process. If …
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» Tennis Courts
Compaction in the construction operation is most important to the performance of the completed asphalt pavement, regardless of the thickness of the course being placed. Compaction should be accomplished by rolling with an eight to ten (8-10) ton powered steel wheel roller or other equipment capable of producing equivalent density.
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HOT MIX ASPHALT PAVEMENT DESIGN GUIDE
4 Chart 1: Recommended Mixes for Normal HMA Applications (Proposed compaction levels based on NCHRP 9-9 levels @ 4% Per Voids) Low Volume Design Level Recommended Aggregate Size Binder Type Compaction Level Compacted Thickness Surface 9.5mm PG64-22 50 gyrations 1.5" Base 12.5mm PG64-22 50 gyrations 2" 19mm PG64-22 50 gyrations 3"
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MATERIALS PROCEDURE COMPACTION TESTING OF HOT …
2.1 This procedure is applicable for all items of hot-mix asphalt pavements requiring compaction testing. 3.0 DEFINITIONS 3.1 Quality ControlTesting – Testing conducted by the Contractor to monitor and control the production of their product. 3.2 Verification Testing – Testing conducted by the Division to determine specification compliance.
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STANDARD CONSTRUCTION SPECIFICATIONS FOR ASPHALT …
Construction Specifications for Asphalt Concrete, by The Asphalt Institute. Mix Design Methods for Asphalt Concrete, by The Asphalt Institute. ... Division 40 – Asphalt Surfacing Revised 11/08 The number of blows of the Compaction hammer used in the Marshall Mix Design will be fifty (50) blows per side of specimen.
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1 ASPHALT CONCRETE COMPACTION 1-1 GENERAL
1 ASPHALT CONCRETE COMPACTION . 1-1 GENERAL . The following are recommendations that can be used to supplement, amend, or replace the local government agency's specifications for asphalt concrete compaction. This is not formattedas a standard special provision, amending either Caltrans specifications or the Greenbook, but is
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SECTION 402 HOT MIX ASPHALT (HMA) PAVEMENTS TABLE …
12. Discuss compaction patterns and equipment to be used to determine patterns. Who will be in control of compaction, paving foreman or density gauge operator? Compaction should always progress from the low side to the high side. A discussion of the tender …
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Pavement 101: Compaction | Engineering Technical Consultants
Compaction is the process of reducing the volume of material by compression. In asphalt paving, this is achieved by. the types of rollers, number of rollers, the rolling patterns, and the material placement temperatures. Properly compacting hot-mix asphalt will result in approximately 25% (1/4-inch per I-inch) reduction in the material thickness.
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Fill/Backfill Compaction Requirements for Sub Base, Base ...
2. Under area paving – one test every 2000 ft² (180 m²) of each lift. 3. Road base and sub-base – one test every 2000 ft² (180 m²) of base or sub-base. 4. Backfill of trenches – one test for every 50 linear ft (15 m) of each lift. 5. General fill – one test every 5000 ft² (460 m²) of each lift. As a minimum, at least one in-place ...
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Asphalt - FDOT
State Construction Pavement Engineer - Rich Hewitt (386) 943-5305. Research Topics. Developmental Specifications (link to Program Management) ; Resources. Specification Information. Asphalt Quick Reference (For Contracts Let after Jan. 2011) (*.pdf, 395kb); LS/DB Asphalt Pay Adjustment System (*.pptx, 68kb) Updated 2/22/17; QCRR - Calculating Engineer Approved Changes …
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GUIDE FOR SPECIFYING ASPHALT PAVEMENTS FOR LOCAL ...
agency wishes to purchase asphalt mixture from a producer, but the mix is placed by the agency or others. Part B references the sections applicable to placement and compaction of asphalt mixes as a finished in-place product. The 2012 version of the INDOT Specifications, Recurring Special Provisions, and Supplemental
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Specifications and Details for Public Works Construction
Asphalt Concrete • Section 719: Polymer Modified Asphalt Concrete Specifications rewritten, or with major updates: • Section 106: Control of Materials • Section 309: Lime Stabilization or Modification of Subgrade • Section 340: Concrete Curb, Gutter, Sidewalk, Curb Ramps, Driveway and Alley Entrance • Section 710: Asphalt Concrete
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STANDARD SPECIFICATIONS
standard specifications (us customary units) volume 2 of 4 sections 200 - 599 construction and materials may 1, 2019 50 wolf road albany, new york 12232
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Georgia DOT Asphalt Pavement Selection Guidelines
PG 76-22 is a polymer modified asphalt cement and is normally used for high traffic areas. The list of qualified bituminous materials is QPL-7. The type of asphalt binder for each mix will be included on the approved GDOT Job Mix Formula for each type of mix. Specifications for asphalt cement are located in Section 820 of the GDOT Specifications.
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SPECIFICATIONS FOR ASPHALT PAVING, MATERIALS, …
SPECIFICATIONS FOR ASPHALT PAVING, MATERIALS, SAMPLING, AND TESTING Public Works Department Page 1 1.0 GENERAL This specification covers asphalt to be used for the construction of roads, laneways, parking lots, and bikepaths. Unless otherwise specified in the contract documents, or
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ASPHALT COMPACTION
The hot asphalt layer is laid 60 mm (2.4"). After compaction, the hot asphalt layer will match the height of the cold mat, assuming that the crew has correctly calculated the compaction rate. Remember, the compaction rate, as a general rule, is about 6 mm (1/4") per 25 mm (1")
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Pavement Manual: Compaction
the compaction specification for the asphalt concrete. Right now we build pavements that have shorter lives than they should." (AAPT 1997) Importance of Compaction Importance of Compaction "Compaction is the single most important factor that affects pavement performance in terms of durability, fatigue life, resistance to deformation ...
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Chapter 4: Construction Details, Section 39: Asphalt ...
Asphalt rubber is specified to include 18 percent to 22 percent crumb rubber modifier (CRM) by total mass of the asphalt rubber blend. The CRM must also include 25 percent, plus or minus 2 percent, high natural rubber content scrap rubber by mass of the CRM …
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Specifying the Right Roller for the Job | CASE News
Considerations for matching machine specs and advanced intelligent compaction features to jobsite requirements. There are many variables that determine the right roller for each compaction job. The first is whether you're compacting soil or asphalt. Other factors are the width of the area to be compacted, the final density required, the grade ...
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