ASTM D-4125 Standard Test Method for Asphalt Content of Bituminous Mixtures by Page 2 Standard Construction Specifications Division 40
Using RAP in Asphalt Mixtures R Michael (Mike) Anderson Asphalt Institute , •Asphalt Content of RAP •Aggregate Gradation of RAP •RAP Specific Gravity •Consensus Aggregate Properties , %RAP = percentage of RAP expressed as a decimal (ie, 030 for 30%).
Percent Voids Filled with Asphalt (VFA) The VFA is the percentage of voids in the compacted aggregate mass that are filled with asphalt cement It is synonymous with the asphalt-void ratio The VFA , of asphalt content: total asphalt content and effective asphalt content.
Volumetric Analysis of HMA Mixtures 2 Volumetrics , total asphalt content minus the percent lost to absorption? P be = P b-P ba 100 P s Volumetric Analysis of HMA Mixtures 27 Dust /Asphalt Ratio F % passing No 200 = A % P be Volumetric Analysis of HMA Mixtures 28 Factors That Influence.
Fuel, Asphalt, & Steel Price Adjustments: NYSDOT Average Posted Prices for Fuel The following is a listing of Average Posted Prices for Fuel, which are to be used in computation of progress and final payments for the Fuel Price Adjustment (Item 69802 and 69805).
The asphalt content is expressed as percent by mass of moisture free mixtur TR 323 DRAFT: Determining the Asphalt Content of Asphaltic Mixture by the Ignition Method This method of test determines the asphalt content of asphalt paving mixtures and pavement samples by removing the asphalt cement by ignition in a furnace.
Note paragraph 31 from the standard reads: 31 Samples obtained in accordance with the procedure given in this practice may be used to measure pavement thickness, density, resilient or dynamic modulus, tensile strength, Marshall or Hveem stability, or for extraction testing, to determine asphalt content, asphalt properties and mix gradation.
Total asphalt content by volume is calculated as the percentage of binder by total mix mass: where Pb = Total asphalt binder content, % by mix mass = Mass of binder in specimen Ms = Mass of aggregate in specimen Total asphalt binder content by volume can be calculated as a percentage of total mix volume using the following formula: where VB.
These procedures use various types of solvent to separate asphalt binder from an uncompacted HMA sample Once the asphalt and solvent are separated from the aggregate, the aggregate is weighed and compared to the initial sample weight, and the asphalt content is calculated as the percentage.
Also, maximum binder content effectively seals off a greater percentage of interconnected air voids in the pavement, making it difficult for water and air to penetrate Of course, a certain percentage of air voids must be left open in the pavement to allow for expansion of the binder in hot weather.
Thus the moisture content of the plant produced mix, as presently measured in the laboratory, is almost always less than 01 percent In reality, the actual moisture content of that mix could be much, much higher--up to 07 percent, or more.
percent of asphalt which should be added to the sand asphalt mixture Also the effects or tiller on the properties or the sand-asphalt mixture were evaluated 'Ihe variables in this study were mineral tiller, asphalt cement, am asphalt content The sand used in this stud;y was sub-rounded, and unitormly' graded The asphalt was asphalt cement.
The durability of an asphalt pavement is a function of the air void content Too high an air void content provides passageways through the HMA for the entrance of damaging air and water Too low an air void content, on the other hand, may lead to flushing, a condition where excess binder squeezes out of the HMA to the surface.
asphalt in Indiana, the ignition oven cannot be used with some mixes or in some parts of the state where they are prevalent Research was needed to establish a modified ignition oven test procedure that would allow for the accurate binder content determination for HMA containing dolomite, a common type of aggregate in Indiana.
Fuel, Asphalt, & Steel Price Adjustments: NYSDOT Average Posted Prices for Fuel The following is a listing of Average Posted Prices for Fuel, which are to be used in computation of progress and final payments for the Fuel Price Adjustment (Item 69802 and 69805).
an asphalt content equal to or slightly higher than the sum of the effective and (estimated) absorbed asphalt content Run the AASHTO T 209 test on the sample and use the equations in ALDOT-384 to calculate the percent of binder that is actually absorbed (Pba) The total.
Volumetric Analysis of HMA Mixtures 2 Volumetrics , total asphalt content minus the percent lost to absorption? P be = P b-P ba 100 P s Volumetric Analysis of HMA Mixtures 27 Dust /Asphalt Ratio F % passing No 200 = A % P be Volumetric Analysis of HMA Mixtures 28 Factors That Influence.
Asphalt pavement material is a precisely engineered product composed of about 95 percent stone, sand, and gravel by weight, and about 5 percent asphalt cement, a petroleum product Asphalt cement acts as the glue to hold the pavement together This uncommon common material gets us from our homes to our workplaces and schools.
Dec 28, 2000· With time, the asphalt-cement binder in an asphalt-concrete mix will oxidize and become more brittle This oxidation or aging process causes the asphalt cement to decrease in penetration and increase in viscosity The rate of oxidation is directly related to the air-void content of the mix The lower.
Dec 28, 2000· With time, the asphalt-cement binder in an asphalt-concrete mix will oxidize and become more brittle This oxidation or aging process causes the asphalt cement to decrease in penetration and increase in viscosity The rate of oxidation is directly related to the air-void content of the mix The lower.
The asphalt content is expressed as percent by mass of moisture free mixtur TR 323 DRAFT: Determining the Asphalt Content of Asphaltic Mixture by the Ignition Method This method of test determines the asphalt content of asphalt paving mixtures and pavement samples by removing the asphalt cement by ignition in a furnace.
Percent Voids Filled with Asphalt (VFA) The VFA is the percentage of voids in the compacted aggregate mass that are filled with asphalt cement It is synonymous with the asphalt-void ratio The VFA , of asphalt content: total asphalt content and effective asphalt content.
Content: A Practical Guide, Publication QIP-124 • How to Increase RAP Usage and Ensure Pavement Performance, NAPA Publication PS 34 • Uses of Waste Shingles in HMA: State-of-the-Practice, Special Report 179 • Guidelines for the Use of Reclaimed Asphalt Shingles in Asphalt.
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