Types of asphalt grades
[PDF File]SECTION 5 SELECTING THE RIGHT TYPE AND GRADE
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Division, Asphalt Laboratory (CST-AL), for additional assistance with PG grade selection. ... There are different types of polymers that can be added, such as styrene butadiene styrene block copolymer (SBS), styrene butadiene rubber (SBR, also called latex), ... grades of material are polymer modified. What is the mixing and compaction ...
[PDF File]Hot Mix Asphalts 101
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Each grade of asphalt emulsion is designed for specific uses. They are described in general terms here. Table 5-1 General Uses of Asphalt Emulsion shows the general uses of standard asphalt emulsion types and grades. 5.1.1 Rapid-Setting Emulsions The rapid-setting grades are designed to react quickly wit h aggregate and revert from
[PDF File]Asphalt Binder Basics
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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)
[PDF File]What is PG? How do I select the PG grade? When do I need ...
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paper as the subject assigned covers only the liquid types. ASPHALT CEMENTS Asphalt cement is a black, sticky, semi-solid substance composed of hydrogen and carbon combinations some of which are in the form of asphaltenes, others in the form of resins, and still others in the form of ... grades of liquid asphalt contain the higher percentages ...
When to Use What Grade of Asphalt and Why
The HMA Pavement Mix Type Selection Guide pro-vides designers with methods for selecting appropriate mix types while considering factors such as traffic, en-vironment, subsurface pavement structure, existing pavement condition and preparation, and economics. The pavement mix types targeted are OGFC, SMA, and fine-and coarse-graded dense mixes.
[PDF File]HMA Pavement Mix Type Selection Guide
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History of Asphalt Grading Systems 4 • 1918 Bureau of Public Roads (now FHWA) developed penetration grades and recommended uses for northern and southern states • 1931 AASHTO published specifications • 1955 Thin film oven (TFO) test added • Current: Five penetration grades specified 40 - …
[PDF File]HISTORY OF ASPHALT GRADING SYSTEMS
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Sr. Regional Engineer - Asphalt Institute Harrisburg, SD Asphalt Binder Basics Specifications, History and Future. Asphalt Binder “A dark brown to black cementatious material in which the predominating constituents are bitumens which occur in ... Binder grades are at 6-degree increments
Choosing the Right Types of Asphalt
we wish to discuss. More specifically, what asphalt should we use for certain applications and why is it best adapted for such use. As implied in the last paragraph, paving asphalt is not a single material but rather a large family of types and grades, manufactured 218
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