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vma in hot mix asphalt

VMA as a design parameter in hot-mix asphalt

the basis for selecting the asphalt binder content. VMA is defined as the sum of the volumes of the air voids and the unabsorbed binder in the compacted specimen. VFA is the percentage of VMA containing asphalt binder. It is widely accepted that these vol

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Reviewing asphalt test results | Asphalt magazine

The air void content of an asphalt mixture is an integral component of all other volumetric properties. Historically, properly designed air voids and VMA are excellent indicators of long-term performance. An air void content out of tolerance on the high s

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EVALUATION OF VOIDS IN THE MINERAL AGGREGATE FOR HMA PAVING

The concept of voids in the mineral aggregate (VMA) is considered fundamental in the design of dense-graded hot mix asphalt (HMA) mixtures. The term VMA describes that portion of the space in a compacted HMA pavement or specimen which is not occupied by t

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Effects of Aggregate Gradation and Angularity on VMA and

The Superpave system adopted the voids in mineral aggregate (VMA) criteria developed by McLeod using the 75-blow Marshall compactor for conventional dense-graded hot mix asphalt (HMA) mixtures. This VMA criteria is a function of only the nominal size of a

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SECTION 400 – ASPHALT PAVEMENTS SECTION 401 – QUALITY CONTROL

The HMA shall be transported and placed according to aQuality Control Plan, QCP, prepared and submitted by the Contractor in accordance with ITM 803; Contractor Quality Control Plans for Hot Mix Asphalt Pavements. The QCP shall be submitted to the Enginee

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SECTION 400 – ASPHALT PAVEMENTS SECTION 401 – QUALITY

SECTION 400 – ASPHALT PAVEMENTS SECTION 401 – QUALITY CONTROL/QUALITY ASSURANCE, QC/QA, HOT MIX ASPHALT, HMA, PAVEMENT 401.01 Description This work shall consist of one or more courses of QC/QA HMA base, intermediate, or surface mixtures constructed on pr

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The Effect of Voids in Mineral Aggregate (VMA) on Hot-Mix

Three of the 10 projects had a VMA decrease of 1.9 or more. These three projects also had the highest plant temperatures and fairly long storage times, which makes increased asphalt absorption a likely cause of the VMA decrease. Five projects showed a mod

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How to Increase VMA

Obtaining adequate VMA in a Superpave mixture is an important part of the mix design which must be met. VMA is only one parameter, aggregate skeleton strength is another. The challenge to Superpave mix designers is to select aggregates which will give the

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VOLUMETRIC ANALYSIS OF HMA MIXTURES

Volumetric Analysis of HMA Mixtures 40 • Percent Voids Filled with Asphalt -VFA ( VMA - Va) VMA Where: VMA = percent Voids in Mineral Aggregate Va = percent Voids in Total Mix VMA = 14.8 % Va = 3.8 % = 74 % VFA, % = 100 * ( 14.8 - 3.8 ) 14.8 VFA = 100 *-E

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» VDOT Mixes & Guidelines

VDOT “Standard” Base Mix. As the name implies, the base mix is the base asphalt layer for the pavement structure. Its major function is to provide the principal support of the pavement structure. The base mix uses the largest aggregate particles to provid

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THEORETICAL MAXIMUM SPECIFIC GRAVITY (G ) AND DENSITY OF HOT

ASPHALT WAQTC / IDAHO FOP AASHTO T 209 (12) T209_short_12.docx Asphalt 15-3 Pub. October 2012 7. Add sufficient water at approximately 25 C (77 F) to cover the sample by about 25 mm (1 in.). Note 1: The release of entrapped air may be facilitated by the a

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S-1 (2360) HOT MIXED ASPHALT - POROUS PAVEMENT Combined 2360

The guideline for percent asphalt binder shall be 5.5 to 6.5 percent by weight of mix. (F) Table 2360.3-B2c (VMA Mixture Requirements) shall be deleted (G) Table 2360.3-B3 shall be modified as follows: Compacted briquette air void content for gyratory des

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Hot-Mix Asphalt Mixture IL-9.5FG

This work shall consist of constructing fine graded hot-mix asphalt (HMA) surface course or leveling binder with an IL-9.5FG mixture. Work shall be according to Sections 406, 407 and 1030 of the Standard Specifications, ... 1/ The VMA for IL-9.5FG shall b

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Understanding the differences between hot mix asphalt and

Nov 20, 2014 · Hot mix asphalt or HMA is the designation given to asphalt mixtures that are heated and poured at temperatures between 300 and 350 degrees Fahrenheit. This type of asphalt is the most commonly used asphalt type in the United States for hig

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Superpave Mix Design - Pavement Interactive

Air voids (V a), sometimes expressed as voids in the total mix (VTM) Voids in the mineral aggregate (VMA) Voids filled with asphalt (VFA) Generally, these values must meet local or State criteria. VMA and VFA must meet the values specified in Table 8.

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Standard Test Method for Determining Field VMA based on the

1.1 This test method is intended to be used for a rapid field determination of voids in mineral aggregate (VMA) of hot mix asphalt (HMA). It provides equations for calculating the VMA based on the asphalt content of the mix and its maximum specific gravit

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Construction and Materials Manual Wisconsin Department of

Construction and Materials Manual Wisconsin Department of Transportation Chapter 8 Materials Testing, Sampling, Acceptance Section 36 QMP - HMA Hot Mix Asphalt (HMA) Quality Management Program sampling, testing, materials properties, and documentation as

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A Manual for Design of Hot-Mix Asphalt with Commentary

Because binder content decreases with decreasing VMA, this means that rut resistance should increase 52 A Manual for Design of Hot Mix Asphalt with Commentary 40 50 60 70 80 90 100 5 10 15 20 25 VMA, Volume % VF A , % 3% 5% 4% (a) 40 50 60 70 80 90 0 5 10

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Draft TRH8 DESIGN AND USE OF HOT -MIX ASPHALT IN

Hot-mix asphalt, mix design, design criteria, surfacing, base layer, levelling course, aggregate. INTRODUCTION Background The use of hot-mix asphalt in South Africa dates back to the 1920s when the larger cities felt the need for ... (VMA) values for cont

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Fix your mix | Asphalt magazine

VMA is the space between the rocks that can be filled with asphalt. The space filled with asphalt is known as VFA (Voids Filled with Asphalt). The remaining space is air voids. VMA is critical to a mixture’s durability and crack resistance. When VMA is lo

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PRACTICE FOR SUPERPAVE VOLUMETRIC DESIGN FOR HOT MIX

FOR HOT MIX ASPHALT (HMA) AASHTO R 35 GLOSSARY Air Voids (Va) -- the total volume of the small pockets of air between the coated aggregate particles throughout a compacted paving mixture, expressed as percent of the bulk volume of the compacted paving mix

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Marshall Mix Design - Pavement Interactive

Hot Mix Asphalt Materials, Mixture Design, and Construction. National Asphalt Pavement Association Education Foundation. Lanham, MD. National Asphalt Pavement Association. (1982 [3]). Development of Marshall Procedures for Designing Asphalt Paving Mixture

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HMA Weight-Volume Terms and Relationships - Pavement Interactive

When VMA is too low, there is not enough room in the mixture to add sufficient asphalt binder to adequately coat the individual aggregate particles. Also, mixes with a low VMA are more sensitive to small changes in asphalt binder content. Excessive VMA wi

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HMA Weight-Volume Terms and Relationships - Pavement

Basic HMA weight-volume relationships are important to understand for both mix design and construction purposes. Fundamentally, mix design is meant to determine the volume of asphalt binder and aggregates necessary to produce a mixture with the desired pr

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The Effect of Voids in Mineral Aggregate (VMA) on Hot Mix

Voids in Mineral Aggregate (VMA) VMA is the volume of intergranular void space between the aggregate particles of a compacted paving mixture. It includes the air voids and the volume of the asphalt not absorbed into the aggregate (Roberts, et al 2]).

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