Mixtures – ASTM D/DM APPARATUS. 1. Ovens / Clause Maintains the temperature at ± °C ( ± °F) ____. 2. Balance. STANDARD. • IRC: SP 11 – (Appendix – 5), ASTM D OBJECTIVE. • To determine the binder content in the asphalt mix by cold solvent extraction. Centrifuge Extractors are used to determine bitumen content in paving mixtures. They comply with ASTM D (Method A) and AASHTO T
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Best quantitative results are obtained when the test is made on mixtures and pavements shortly after their preparation. Allow the machine to stop, add mL of trichloroethylene, normal Propyl Bromide, or methylene chloride and repeat the procedure. Circulate a gentle steady stream of cool water through the condenser.
The material used in fabricating the condenser shall be essentially unreactive to water and to the solvent used and shall be provided with d21722 water inlet and outlet. Permission rights to photocopy the standard may also be secured from the ASTM website www. Set the condenser cover in place on the kettle. Once this is accomplished the remaining aggregates are weighed and graded.
Aggregate extracted from a paving mixture may be used for sieve analysis using Test Method D When recovering the asphalt binder for property testing, all mineral matter should be removed from the effluent. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM-D – Free Download PDF
Swirl until the diatomaceous silica is completely in suspension. A bail handle may be provided on the inside of the top rim of each frame for convenient handling. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. If necessary, adjust the temperature of the hot plate to maintain the solvent stream at a rate necessary to keep the test portions in the cone s completely covered with condensed solvent.
The extract may be transferred directly from the extraction cylinder to the centrifuge feed container A number in parentheses indicates the year of last reapproval.
Best quantitative results are obtained when the dd2172 is made on mixtures and pavements shortly after their preparation.
If trichloroethylene or normal Propyl Bromide is used as the extraction solvent, the preliminary drying on a steam bath may be omitted. Precision and Bias Transfer all of the extract from Test Methods A, B, C, D, or E as appropriate to an appropriate feed container suitably equipped with a feed control valve or clamp, etc.
At this point, turn off the hot plate and allow the apparatus to cool axtm the water running in the condenser. Increase the heat and c2172 active boiling until solvent dripping from the basket appears light straw color when viewed against a white background.
XX Asphalt Centrifuge Extractor Explosion Proof Available in g and g capacities, these extractors conform to the explosion-proof standards for the safety of operating personnel. The apparatus should be provided with a container for catching the solvent thrown from the bowl and a drain for removing the solvent. Aggregate obtained by these methods may be used for sieve analysis using Test Method D The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Centrifuge Extractors, continued These units require a relatively short processing time, which includes weighing the asphalt sample, heating the sample slightly until it starts crumbling, cooling the sample, placing it in the centrifuge extractor’s rotor bowl and then adding solvent. Stop the vacuum when all solvent has been removed.
Weight before and after extraction determines constituent proportions. It is difficult to remove aastm the asphalt when some aggregates are used and some chlorides may remain within the mineral matter affecting the measured asphalt content. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior axtm use.
We need your help! Lift out the basket and condenser assembly.
Centrifuge Extractors, ASTM D
Digest at room temperature for 1 h. The apparatus preferably shall be provided with explosion-proof features and installed in a hood or an effective surface exhaust system to provide ventilation.
A standard 25 L aluminum cooking utensil has been found to be suitable. Fit the extractor lid tightly in place and allow water to circulate freely in the top. Again, record the mass.
Determine the mass of an ignition dish. The diameter of the paper shall be such that when folded in accordance with the directions given below, it shall completely line the qstm cones in the frames.
Remove the ring and brush the clinging aggregate into the drying pan. This test is not appropriate for testing asphalt mixtures containing coal tar.