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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ASTM D Standard
We need your help to maintenance this website. Please help us to share our service with your friends. A number in parentheses indicates the year of last reapproval. This standard adtm been approved for use by agencies of the Department of Defense. Sco Scope pe 1.
The values stated in each system may not be exa exact ct equ equiva ivalen lents; ts; the theref refore ore, each system shall be used independently asm the other. Combining values from the two systems may result in non-conformance with the standard.
Best quantitative results are obtained when the test is made on mixtures and pavements shortly after their preparation. It is difficult to remove all the asphalt when some aggregates are used and somee chl som chlori orides des may rem remain ain wit within hin the min minera erall mat matter ter af affec fectin ting g the measured asphalt content.
Summ Summary ary of Test Test Methods 3. Th Thee bi bitu tume men n co cont nten entt is ex expr press essed ed as ma mass ss percentt of moistu percen moisture-fr re-free ee mixtur mixtures.
Referenc Referenced ed Documents Documents 2.
Ea Each ch me meth thod od pr pres escr crib ibes es th thee solvent or solvents and any other reagents that can be used in 1 These test methods are under the jurisdiction of ASTM Committee D04 on Road and Pavin Paving g Mater Materials ials and are the direct responsibilit responsibilities ies of Subco Aetm mmitteee D Current Curre nt editi edition on appro approved ved Feb.
Originally approved in Last previous edition approved in as D — The last approved version of this historical standard is referenced d21172 www.
Committee of the American Conference of Governmental Industrial Hygienists6 for the current threshold limit values. Split or quarter the material until the mass of material required for test is obtained. Optional small-mouth graduate, mL capacity. Take this test specimen from the remaining sample of the mixture immediately after obtaining the extraction test specimen.
The apparatus should be provided with a container for catching the solvent thrown from the d217 and a drain for removing the solvent. The apparatus preferably shall be provided with explosion-proof features and installed in a hood or an effective surface c2172 system to provide ventilation.
The ash content of the paper shall not exceed 0. Place the bowl containing the test portion and the solvent in the extraction apparatus. Clamp the cover on the bowl tightly and place a beaker under the drain to collect the extract. Allow the machine to stop, add mL of trichloroethylene, normal Propyl Bromide, or methylene chloride and repeat the procedure.
ASTM D2172
Use sufficient mL solvent additions not less than three so that the v2172 is not darker than a light straw color. Collect the extract and the washings in a suitable graduate. Position a container at the appropriate spout to catch the effluent from the centrifuging operation.
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, atm.
If trichloroethylene or normal Propyl Bromide is used as the extraction solvent, the preliminary drying on a steam bath may be omitted. After all the extract has passed through the centrifuge, wash the feed mechanism with centrifuge still running with several increments of clean solvent, allowing each increment to run through the centrifuge until the effluent is essentially colorless.
Clean the outside with fresh solvent. Cool the container and redetermine the mass immediately. Determine the mass of an ignition dish.
Agitate the extract thoroughly and immediately measure approximately mL into the ignition dish. Evaporate to dryness on a steam bath or hot plate, except use a steam bath when the solvent is benzene. Digest at room temperature for 1 h. Calculation of Bitumen Content The lower frame shall have legs of sufficient length to support the frame, including the apex of the metal cone and paper cone liner above the solvent level. When two frames are used, the upper frame shall have legs of sufficient length to support the metal cone and paper cone liner at or above the top rim of the lower frame.
A bail handle may be provided on the inside of the top rim of each frame for convenient handling. The metal used in fabricating the frames shall be essentially inactive to the solvents used in the test method. The material used in fabricating the condenser shall be essentially unreactive to water and to the solvent used and shall be provided with suitable water inlet and outlet. The diameter of the paper shall be such that when folded in accordance with the directions given below, it shall completely line the metal cones in the frames.
In this case, it is not necessary to transfer the extract from the extraction cylinder to a graduated cylinder. The extract may be transferred directly from the extraction cylinder to the centrifuge feed container Preparation of Test Portion Record the mass, identifying each frame by number. If two frames are used, distribute the test portion approximately equally between the two. The top of the test portion must be below the upper edge of the paper liner. Again, record the mass.
Pour the solvent into the glass cylinder and place the bottom frame into it. The solvent level should be below the apex of the one in the lower frame. A standard 25 L aluminum cooking utensil has been found to be suitable. Preparation of Test Portions Circulate a gentle steady stream of cool water through the condenser. 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.
At this point, turn off the hot plate and allow the apparatus to cool with the water running in the condenser. When boiling has ceased and the cylinder is cool enough to handle, turn off the condenser and remove from the cylinder. Fit the extractor lid tightly in place and allow water to circulate freely in the top. Apply heat from either a gas burner or an electric hot plate. Shut down the extractor after 1.
Mix the test portion with a trowel and continue extraction to completion. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. Combine the extract and the washings in a graduated cylinder. Calculate the mass of the test portion. Pour approximately mL of solvent 6. Set the condenser cover in place on the kettle.
Increase the heat and maintain active boiling until solvent dripping from the basket appears light straw color when viewed against a white background.
If a stainless steel kettle is used, lift out the basket and the condenser cover assembly for examination of the solvent. Lift out the basket and condenser assembly.
Transfer the extraction to a mL 2d172. Wash the extractor clean with solvent and add the washings to the extract. In this case, it is not necessary to transfer the extract to the graduated cylinder. The extract may be transferred directly from the extractor to the centrifuge feed container Reagents and Materials When sufficiently cool, pour mL of denatured alcohol over the specimen. Add approximately mL of methylene chloride and stir until the asphalt is visually in solution.
Swirl until the diatomaceous silica is completely in suspension. Start the vacuum pump and let it run until the pad formed by the diatomaceous silica is surface dry and begins to crack slightly. Remove it with tongs and wash with the wash bottle. Stop the vacuum when all solvent has been removed. After the last wash, gently pour the entire sample into the extractor and thoroughly rinse all aggregate particles from the sample container.
Remove the ring and brush the clinging aggregate into the drying pan. Precision and Bias Water absorption capacities were consistently below 1. Therefore the precision statement atsm each test method includes data obtained using any of the following solvents: Treat the test portion in the bowl with three mL additions of trichloroethylene, following the same procedure.
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