Chapter 4: Construction Details, Section 39: Asphalt ...
Section 39 Asphalt Concrete 4-3901 General. Section 39, “Asphalt Concrete,” of the Standard Specifications provides material and construction requirements for hot mix asphalt (HMA) including Type A, rubberized hot mix asphalt-gap graded (RHMA-G), open-graded friction course (OGFC), minor HMA, and hot mix asphalt with warm mix asphalt (WMA) additive technology.
Another way to look at it is this: In a 6000 lb. batch of mix, there are about 5600 lbs. of aggregate and about 400 lbs. of asphalt. Dense-graded aggregate has about 35 sq. ft. of surface area per pound, or 196,000 sq. ft/6000 lb. batch; 400 pounds of asphalt is about 48 gallons.
While weight is used to control the amount of material metered into the mix at the asphalt plant, determining what that weight should be is based on volume. The primary items are air voids and binder volume which combine to become voids in mineral aggregate (VMA). These are all volume proportions of the mix and asphalt binder and aggregate ...
Evaluation system for CO2 emission of hot asphalt mixture ...
Apr 01, 2015 · The weight function directly reflected the relative degree of influence of each stage. From Table 6, the weight of the aggregate heating stage was the largest at 0.4130, followed by the weight of asphalt heating at 0.2335 and then by mixture mixing at 0.1522. The weights of the other stages were small and had a small effect on carbon emissions.
PDF Standard Construction Specifications for Asphalt Surfacing ...
plant, storage yards, and other facilities for producing and processing the material construction. ... (0.5%) by weight of the asphalt. Such additive material shall be of quality and grade acceptable to the Engineer. Article 2.4 Equipment A. General All equipment used on this Work shall be of sufficient size and in such mechanical
The weight of an asphalt pavement depends upon the aggregate type, the asphalt, and the air void content. An average example in the United States is about 112 pounds per square yard, per inch of pavement thickness.
The Asphalt Materials section is AASHTO accredited and can perform all of the standard AASHTO and ASTM tests relating to asphalt mixes and asphalt binders. The section also conducts a variety of specialized tests including gyratory compaction, loaded wheel rut and fatigue, cracking, abson recovery, reflux and moisture damage tests.
In Europe there are more than 4.000 asphalt plants producing around 300 million tons of asphalt pavement material per year? The European asphalt industry employs about 180,000 people. Asphalt pavement material is a precisely engineered product composed of about 95% stone, sand and filler per weight, and about 5% percent of bitumen, a petroleum ...
Asphalt Content, % P 2,3 2.0-4.0 NA 2.5-4.5 NA 7.0-9.5 NA Mixing and Placing Temperature Range P oC 110-150 110-150 120-165 NOTES: 1. All aggregate percentages are based on the total weight of the aggregate. 2. The asphalt content is based on the total weight of the mix. When using slag aggregates in the mix, the asphalt content shall
Asphalt Calculator - How much asphalt do you need?
Many road builders and just people who want a nice driveway to their home are faced with estimating the amount of Hotmix Asphalt (HMA, also bitumen, blacktop, Tarmac) they need to cover a given area with it. Our asphalt calculator is of great utility in such cases, but you should keep in mind that the results will only be as good as the measurements entered into it. Also, we use a standard asphalt density of 145 lbs/ft3 (2322 kg/m3) which may be somewhat different depending on the precise asphal
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Hot mix asphalt (HMA) paving materials are a mixture of size-graded, high quality aggregate (which can include reclaimed asphalt pavement [RAP]), and liquid asphalt cement, which is heated and mixed in measured quantities to produce HMA. Aggregate and RAP (if used) constitute over 92 percent by weight of the total mixture.
Asphalt Fume in Table AC-1 of Cal/OSHA code 5155. This means that a total particulate sample is taken and if it is near the 5 mg/m3 standard the lab would do a solvent extraction of the sample to see how much of the weight was actually due to Asphalt Fume. If that extraction were to weight over the 5 mg/m3 PEL there would be