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asphalt cement content determined from the final residue is compared to asphalt cement content from the initial known masses. The difference in these two asphalt cement contents becomes the correction factor. RAP materials are problematic however, because we usually do not have their original asphalt cement and aggregate as separate constituents.
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II. Do not use the same sample used for moisture determination as used for asphalt content determination. Table 2 Required Weight of Recycled Material Sample Recycled Material Type Required Weight of Sample, g Reclaimed Asphalt Pavement (RAP)1 1,000–4,000 Recycled Asphalt Shingles (RAS)2 500–700 1. Refer to Table 1 for …
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Abstract: This study identified an alternate method of asphalt content determination to replace chlorinated solvent extraction. The production of trichloroethane was outlawed on December 31, 1996 as part of the 1990 Clean Air Act Amendments. Initially, the study focused on evaluating the nuclear asphalt content gauge with Marshall plugs.
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(such as trichloroethylene), to aid in the determination of asphalt cement content and aggregate gradation of bituminous mixtures (1). A new type of equipment has been introduced to physically burn the asphalt cement (AC) from bituminous mixtures, this eliminates the requirement for chlorinated solvents. This new type of
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a method for the rapid determination of asphalt content has been developed in which the weight of a sample before and after removal of the asphalt by burning is utilized. virtually complete combustion of the asphalt is achieved by subjecting the asphaltic paving mixture sample to a very high temperature and an excess of oxygen in a special, but …
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Jun 01, 2007· This method can be used for the determination of bitumen ratio or asphalt content of hot mix asphalt paving mixtures and pavement samples for quality control, specification acceptance, and mixture evaluation. Bitumen ratio is the ratio of the weight of asphalt to the dry weight of aggregate in an asphalt mixture.
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Apr 28, 2021· 3.1 These test methods are useful as a rapid, nondestructive technique for determination of asphalt content of asphalt mixtures. 3.2 These test methods are suitable for quality control and acceptance testing for construction and for research and development applications. The test method is used for determination of asphalt content only as it ...
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an evaluation was made of the application of the troxler nuclear asphalt content gauge, model 2226, to determine the asphalt content of hot bituminous mixes using neutron thermalization. parallel data were acquired, where convenient, by the use of a nuclear-chicago asphalt content gauge, model 9999, previously evaluated. data were first …
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asphalt content gauge, model 2226, was purchased, and ail investigative study was undertaken to evaluate this new gauge. THE TROXLER GAUGE The 16-by 16-by 16-in. Troxler gauge (Fig. 1) consists of a one-piece unit weigh ... interactions are of importance in the determination of asphalt content in bituminous mixes. With scattering, the nucleus ...
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the asphalt binder content of bituminous paving mixtures by removing the asphalt binder via pyrolysis. Bituminous mixture samples are placed in a furnace and heated past the autoignition point of the asphalt binder (typically ranging from 420 to 570°C). The asphalt binder is ignited and burned off leaving the aggregate intact.
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1.1. This method covers the determination of asphalt binder content of hot-mixed paving. mixtures by ignition of the asphalt binder in a furnace. 1.2. Safety Notice: This procedure involves temperatures in the range of 1200°F and. will require the technician to wear appropriate safety protection during the testing.
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1. Compared to the reflux extraction procedure, nuclear asphalt content gauges determine asphalt content of bituminous mixes with much greater accuracy and comparable precision. 2. As a means for determining asphalt content, the nuclear proce dure should be used as an alternate to chemical extractions whenever possible.
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The use of extraction solvents for asphalt content determination in New Hampshire has become a safety, time, and waste disposal issue over the years. ... Centrifugal extraction of hot mix asphalt (HMA) for asphalt cement (AC) content and aggregate gradation currently take 2.5 hours with the use of the terpene-based solvents required by the New ...
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This study identified an alternate method of asphalt content determination to replace chlorinated solvent extraction. The production of trichloroethane was outlawed on December 31, 1996 as part of the 1990 Clean Air Act Amendments. Initially, the study focused on evaluating the nuclear asphalt content gauge with Marshall plugs.
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Asphalt Binder Content Determination Test Procedure 7.3.1. Allow ignition furnace to preheat to 1000 + 18°F. Record the furnace temperature (set point) prior to the initiation …
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Use this device for the rapid determination of the asphalt cement content of bituminous mixtures and make adjustments, if necessary, in the asphalt cement metering system with a limited amount of mix production. This procedure is useful in determining asphalt cement content only and does not provide extracted aggregate for gradation analysis.
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The results show that the optimum asphalt content (OAC) for base asphalt was 5.7% and OAC for ASA polymer modified asphalt mixtures was 5.9 for 3% ASA, 6% for 5% ASA, and 6.2% for 7% ASA, while OAC of Al 2 O 3 nanoparticles modified asphalt mixtures …
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CP 55 Reducing Field Samples of Hot Mix Asphalt to Testing Size . CP 85 Binder and Asphalt Cement Content of Asphalt Mixtures by the Nuclear Method . 3. SUMMARY OF TEST METHODS. 3.1 A specimen of bituminous mixture is heated in a furnace at a high enough temperature to ignite the asphalt binder fraction, which burns away.
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