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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Permission rights to photocopy the standard may also be secured from the ASTM website www. Aggregate obtained by these methods may be used for sieve analysis using Test Method D Take this test specimen from the remaining sample of the mixture immediately after obtaining the extraction test specimen. The values stated in each system may not be exa exact ct equ equiva ivalen lents; ts; the theref refore d212, each system shall be used independently of the other.
Remove it with tongs and wash with the wash bottle. The results obtained by these test methods may be affected by the age of the material tested, with older samples tending to yield slightly lower asphalt binder content.
Historical Version s – view previous versions of standard. Apply heat from either a gas burner or an electric hot plate. XX Centrifuge Extractor, Filterless Use in the extraction of mineral fines from bitumen-laden solvents obtained from standard asphalt extraction tests.
We need your help! We need your help to maintenance this website. The extractor’s centrifugal action forces liquid through a filter paper ring at bowl’s periphery, and the process is repeated until the expelled solvent is a clear color. Note 1—The results obtained by these test methods may be affected by the age of the material tested, with older samples tending to yield slightly lower bitumen content.
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. Remove the ring and brush the clinging aggregate into the drying pan. The extract may be transferred directly from the extraction cylinder to the centrifuge feed container Link to Active This link will always route to the current Active version of the standard. Please fill this form, we will try to respond as soon as possible.
We are a non-profit group that run this website to share documents. At this point, turn off the hot plate and allow the apparatus to cool with the water running in the condenser. Split or quarter the material until the mass of material required for test is obtained. Link to Active This link will always route to the current Active version of the standard. Combining values from the two systems may result in non-conformance with the standard.
Transfer the extraction to a mL graduate. Specific hazards are given in Section 7. It is difficult to remove all the asphalt when some aggregates are used and some chlorides may remain within the mineral matter affecting the measured asphalt content. Originally approved in Shut down the extractor after 1. Please copy and paste this embed script to where you want to embed Embed Script. If trichloroethylene or normal Propyl Bromide is used as the extraction solvent, the preliminary drying on a steam bath may be omitted.
The apparatus should be provided with a container for catching the solvent thrown from the bowl and a drain for removing the solvent. 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. Position a container at the appropriate spout to catch the effluent from the centrifuging operation. Increase the heat and maintain active boiling until solvent dripping from the basket appears light straw color when viewed against a white background.
Active view current version of standard. Use sufficient mL solvent additions not less than three so that the extract is not darker than a light straw color. Start the vacuum pump and let it run until the pad formed by the diatomaceous silica is surface dry and begins to crack slightly.
ASTM D Standard
The top of the test portion must be below the upper edge of the paper d21722. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend.
The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Digest at room temperature for 1 h.
Add approximately mL of methylene chloride and stir until the asphalt is visually atsm solution. Mix the test portion with a trowel and continue extraction to completion. Set the condenser cover in place on the kettle.