Essential articles

Latest subject

  • Conventional Asphalt Mix Design - IIT Bombay

    CONVENTIONAL ASPHALT MIX DESIGN. Asphaltic Concrete Asphaltic concrete is a mixture of Coarse Aggregate Fine aggregate Mineral filler and Bitumen Well graded aggregates and mineral filler resulting in maximum density when mixed with optimum quantity of bitumen results in a mix with very high stability. Stability Enough resistance to deformation .

    Get Price Online
  • Pavement Manual: Hot-Mix Asphalt Pavement Mixtures

    Anchor: #i1013899 Section 6: Hot-Mix Asphalt Pavement Mixtures Anchor: #i1013905 6.1 General. Hot-mix asphalt (HMA) is a generic term that includes many different types of mixtures of aggregate and asphalt cement (binder) produced at elevated temperatures (generally between 300-350ºF) in an asphalt .

    Get Price Online
  • THEORETICAL MAXIMUM SPECIFIC GRAVITY (G ) AND .

    T209_short_12.docx Asphalt 15-1 Pub. October 2012 THEORETICAL MAXIMUM SPECIFIC GRAVITY (Gmm) AND DENSITY OF HOT MIX ASPHALT (HMA) PAVING MIXTURES FOP FOR AASHTO T 209 Scope This procedure covers the determination of the maximum specific gravity (Gmm) of uncompacted hot mix asphalt (HMA) paving mixtures in accordance with AASHTO T 209-12.

    Get Price Online
  • How to Calculate Asphalt Tonnage | Hunker

    The weight of asphalt in tons required for a paving project may be readily calculated using a few simple tools and concepts. The weight of any substance in pounds is related to its weight density or compactness. Weight density is the number of pounds of a material contained in .

    Get Price Online
  • Density of Asphalt Concrete-How Much Is Needed?

    measure bulk density of asphalt mixture are physical measure­ ments of cores and use of the nuclear gauge. The nuclear gauge is fast and nondestructive but is not as accurate as the core method. The amount of voids in the asphalt mixture is probably the factor that most affects performance throughout the life of an asphalt pavement.

    Get Price Online
  • Asphalt Mixtures Calculator - Vulcan Materials Company

    Asphalt Mixtures Calculator. Enter the width, length and thickness, then hit the "Calculate" button to calculate your estimate. You may also revise the default density value of 145 lbs/cubic ft. Actual densities may vary depending on the components of the mix.

    Get Price Online
  • National Asphalt Pavement Association

    For example pounds per cubic foot. The density of asphalt pavement mixtures does vary depending on mix proportions and the type of aggregate. If you do not know the in-place density of mixes, you must ask your supplier. To determine the weight of material multiply the volume by the density of material: Weight = Volume × Density

    Get Price Online
  • Asphalt QMS - 2016 - Connect NCDOT

    Asphalt QMS - 2016 iii Section 10: Roadway Inspection and Testing of Asphalt Pavements Page No. Subsection Change 10-6 10.1.7 Replaced +15 °F to -25 °F with ±±±± 25° F (mix .

    Get Price Online
  • Asphalt Pavement Construction - Asphalt Institute

    Mix temperature is dependent on the grade of asphalt used in the mix: Less viscous asphalt requires lower temperatures, while more viscous asphalt requiers higher temperatures. At the start of a mix design, target temperatures are specified for proper mixing and compaction.

    Get Price Online
  • Accurate Density Determination of Asphalt

    The quality and uniformity of the asphalt mixture determines whether a road will be paved evenly to achieve the highest quality, most resilient surface. The standard test method (ASTM D70-09) for measuring and comparing the density of semi-solid bituminous materials or asphalt, as prescribed by ASTM international, is a pycnometer method [6 .

    Get Price Online
  • Bulk Specific Gravity - Pavement Interactive

    Specific gravity is a measure of a material's density (mass per unit volume) as compared to the density of water at 73.4°F (23°C). Therefore, by definition, water at 73.4°F (23°C) has a specific gravity of 1. Bulk Specific Gravity Use. Superpave mix design is a volumetric process; key properties are expressed in terms of volume.

    Get Price Online
  • Asphalt concrete - Wikipedia

    Cut-back asphalt concrete Is a form of cold mix asphalt produced by dissolving the binder in kerosene or another lighter fraction of petroleum prior to mixing with the aggregate. While in its dissolved state, the asphalt is less viscous and the mix is easy to work and compact.

    Get Price Online
  • THEORETICAL MAXIMUM SPECIFIC GRAVITY (G ) AND .

    T209_short_12.docx Asphalt 15-1 Pub. October 2012 THEORETICAL MAXIMUM SPECIFIC GRAVITY (Gmm) AND DENSITY OF HOT MIX ASPHALT (HMA) PAVING MIXTURES FOP FOR AASHTO T 209 Scope This procedure covers the determination of the maximum specific gravity (Gmm) of uncompacted hot mix asphalt (HMA) paving mixtures in accordance with AASHTO T 209-12.

    Get Price Online
  • How much does density matter? | Asphalt magazine

    The normal target in-place density on a "dense" hot-mix asphalt pavement is 92 to 93 percent of Gmm (or 7 to 8 percent air voids). If a pavement has low density (usually defined as less than 92 percent of Gmm), the air voids are interconnected and premature pavement distresses can result.

    Get Price Online
  • What's the density of bitumen? - Quora

    Feb 02, 2017 · Bitumen(Asphalt) is a mixture of Organic Liquids that are highly Viscous, Black, Sticky, Entirely Soluble in Carbon Disulfide, and composed primarily of highly condensed Polycyclic Aromatic Hydrocarbons. The primary use (70%) of bitumen is in road.

    Get Price Online
  • Georgia DOT Asphalt Pavement Selection Guidelines

    (either asphalt cement or asphalt emulsion) and cover aggregate. The aggregate used in each layer is of uniform size as practical and the maximum size aggregate for each successive layer is approximately one-half that of the previous layer. The two HMA mix types for low-volume pavements specified in Georgia are 4.75 and 9.5-Type I.

    Get Price Online
  • What is Marshall Mix Design for Bituminous Materials?

    The Marshall Mix Design method was originally developed by Bruce Marshall of the Mississippi Highway Department in 1939. The main idea of the Marshall Mix Design method involves the selection of the asphalt binder content with a suitable density which satisfies minimum stability and range of flow values.

    Get Price Online
  • How to Convert Liquid Asphalt Content Tonnage to Gallons .

    When paving with asphalt, you normally purchase liquid asphalt and mix it with an aggregate such as gravel or crushed rock before laying it down. Liquid asphalt is commonly sold in tons or pounds. If you are purchasing large quantities of asphalt, you often will have to convert the tonnage or poundage into gallons to get the correct amount for .

    Get Price Online
  • how do you calculate the density of hot mix (asphalt) just .

    Jul 04, 2007 · the bulk density of the asphalt will increase after it is compacted by heavy rollers.I want to know how to calculate the bulk densty if i know the densities of the aggregate and the density of the bitumin in the mixture.I also want to know how much the density is .

    Get Price Online
  • Asphalt Mix Design | Stonemont Solutions

    Asphalt Mix Design and Quality Control Software Management System. StonemontQC includes powerful asphalt mix design and quality control features for asphalt producers. StonemontQC aggregate and asphalt capabilities are completely integrated thus allowing mix component properties to be easily updated or substituted from aggregate plants.

    Get Price Online
  • Asphalt Pavement Thickness and Mix Design - Asphalt .

    Air voids is a reverse proportion of the density of the compacted mix. By specifying a density requirement, the voids are inversely controlled. Keep in mind that density is a relative term, compared to a target density of either lab compacted mix, a maximum theoretical density, or a control strip density.

    Get Price Online
  • Theoretical Maximum Specific Gravity - Pavement Interactive

    Overview. The theoretical maximum specific gravity (Gmm) of a HMA mixture is the specific gravity excluding air voids. Thus, theoretically, if all the air voids were eliminated from an HMA sample, the combined specific gravity of the remaining aggregate and asphalt binder would be the theoretical maximum specific gravity. Theoretical maximum specific gravity can be multiplied by the density of .

    Get Price Online
  • Hot Mix Asphalts 101 - New Jersey

    Asphalt Rubber Applications • Asphalt rubber is the process of adding recycled, crumb rubber to hot mix asphalt (called dry process) or the asphalt binder (called wet process) to modify the final mixture • Difficult to use in dense-graded mixtures due to residual crumb rubber • Best used in gap-graded type mixtures (SMA and OGFC)

    Get Price Online
  • Three Hot Mix Asphalt Types - thebalancesmb

    Jan 14, 2019 · Widely used for its convenience, hot mix asphalt is the most common used flexible pavement in the US. It is also known as blacktop or bitumen, and sometimes just hot mix. Hot mix pavements are classified mainly as dense-graded mixes, stone matrix mixes, and open-graded hot mix asphalt. There are also other types of asphalt but are limited to .

    Get Price Online
  • Concrete, Asphalt volume to weight conversion - AquaCalc

    Concrete, Asphalt weighs 2.243 gram per cubic centimeter or 2 243 kilogram per cubic meter, i.e. density of concrete, Asphalt is equal to 2 243 kg/m³. In Imperial or US customary measurement system, the density is equal to 140 pound per cubic foot [lb/ft³], or 1.297 ounce per cubic inch [oz/inch³] .

    Get Price Online
  • Asphalt Pavement Thickness and Mix Design - Asphalt .

    Air voids is a reverse proportion of the density of the compacted mix. By specifying a density requirement, the voids are inversely controlled. Keep in mind that density is a relative term, compared to a target density of either lab compacted mix, a maximum theoretical density, or a control strip density.

    Get Price Online
  • What is the density of asphalt pavement - Answers

    density of loose Asphalt is 2.20Ton/CM-2.45Ton/CM Go. . traffic frequency, weather conditions, asphalt mix design, and compaction of the asphalt during construction. As the asphalt binder in the .

    Get Price Online
  • Asphalt Calculator - how much asphalt do you need in tons .

    Also, we use a standard asphalt density of 145 lbs/ft 3 (2322 kg/m 3) which may be somewhat different depending on the precise asphalt mixture you purchase. The calculation process is: Estimate the volume of asphalt needed, using geometrical formulas and plans or measurements. Estimate the density of the hotmix to be used.

    Get Price Online
  • Improving pavement density | Asphalt magazine

    Laboratory testing based on a joint Asphalt Institute and Kentucky Transportation Center study found that increasing the pavement density from 92 to 93 percent of the maximum theoretical density (or 7-8 percent air voids) could improve the pavement fatigue life by 10 percent.

    Get Price Online
  • Asphalt Pavement Density 1 - Generic Reviews .

    Mar 06, 2002 · Hot mix asphalt density was selected as a review topic for our 2002 joint review program. Attaining proper density of hot mix asphalt is critical to assuring the long-term durability of the completed pavement. Our review scope, procedures, and guidelines are attached.

    Get Price Online
  • HMA Pavement Mix Type Selection Guide

    Hot Mix Asphalt (HMA) pavements consti- . borrow material compacted to a specified density. The pavement layers are generally divided into a surface course, intermediate or binder course, and a base course. The surface, binder, and base courses are . 2 HMA PAVEMENT MIX TYPE SELECTION GUIDE.

    Get Price Online
  • Volumetrics in Asphalt Mixtures

    passageways through the mix for the entrance of damaging air and water. A low air-void content, on the other hand, can lead to flushing, a condition in which excess asphalt squeezes out of the mix to the surface. Density and void content are directly related. The higher the density, the lower the percentage of voids in the mix, and vice versa.

    Get Price Online
  • Bulk Specific Gravity - Pavement Interactive

    Specific gravity is a measure of a material's density (mass per unit volume) as compared to the density of water at 73.4°F (23°C). Therefore, by definition, water at 73.4°F (23°C) has a specific gravity of 1. Bulk Specific Gravity Use. Superpave mix design is a volumetric process; key properties are expressed in terms of volume.

    Get Price Online
  • Properties Considered in Mix Design Superpave Mix Design .

    of Hot Mix Asphalt BULK SPECIFIC GRAVITY OR DENSITY The density of the compacted mix is the unit weight of the mixture (the weight of a specific volume of HMA). Density is important because proper density in the finished product is essential for lasting pavement performance. Mix properties are required to be measured in volumetric terms as well as

    Get Price Online
  • Hot Mix Asphalt Testing Technician | cttp | University of .

    Hot Mix Asphalt Testing Technician. U of A cttp; Technicians; Hot Mix Asphalt Testing Technician; The Hot Mix Asphalt Testing Technician course covers the sampling and testing of hot mix asphalt, to include volumetric analysis of compacted specimens, asphalt content, and in-place density.

    Get Price Online
  • VDOT Mixes & Guidelines - vaasphalt

    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 provide resistance to rutting and to .

    Get Price Online
  • How to Calculate Asphalt Tonnage | Hunker

    The weight of asphalt in tons required for a paving project may be readily calculated using a few simple tools and concepts. The weight of any substance in pounds is related to its weight density or compactness. Weight density is the number of pounds of a material contained in .

    Get Price Online
  • SUBJECT: HOT MIX ASPHALT (HMA) MIXTURE DESIGN AND .

    Materials Method 5.16 describes New York State Department of Transportation's (NYSDOT) requirements and policies for the development of Hot Mix Asphalt (HMA) mixture designs, . Gravity (Gmm) and Density of Hot Mix Asphalt (HMA). 21. AASHTO T 228 - Standard Method of Test for Specific Gravity of Semi-Solid Asphalt Materials. 22. AASHTO T 245 .

    Get Price Online
  • Asphalt Pavement Density 1 - Generic Reviews .

    Mar 06, 2002 · Hot mix asphalt density was selected as a review topic for our 2002 joint review program. Attaining proper density of hot mix asphalt is critical to assuring the long-term durability of the completed pavement. Our review scope, procedures, and guidelines are attached.

    Get Price Online
  • What is the density of asphalt cement? - Answers

    Cold Mix Asphalt is a mixture of Aggregate and Asphalt. The Asphalt is usually am emulsion asphalt or a cutback asphalt. An emulsion asphalt is asphalt cement blended with water.

    Get Price Online