ASTM D6926 PDF
Preparation of Bituminous Specimens Using Marshall Apparatus. ASTM D – Download as PDF File .pdf), Text File .txt) or read online. Designation: D – 10Standard Practice for Preparation of Bituminous.
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ASTM International takes no position respecting the validity of any patent rights asserted in connection with dd6926 item mentioned in this standard. The holders shall hold the compaction mold, collar, and base plate securely in position during compaction of the specimen.
Subscription pricing is determined by: Specimens should be accepted or rejected for further testing based on requirements of the criteria being applied. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. It is up to the user to establish the specific required number of blows to be used for compaction of the specimen in relation to the field. We need your help to maintenance this website. The reheating process will have only minor influence on binder hardening.
ASTM D – 04 Standard Practice for Preparation of Bituminous Specimens Using Marshall Apparatus
Allow the specimen to cool sufficiently to prevent damage and extract the specimen from the mold. Please copy and paste this embed script to where you want to embed Embed Script. Temperature of the mixture immediately prior to compaction shall be within the limits of the compaction temperature established in 5.
Place the mixture in the mold, spade the mixture vigorously with a heated spatula or trowel 15 times around the perimeter and 10 times over the interior. We need your help! However, care should be exercised to prevent mix loss.
Stability of reheated and recompacted mixtures from existing pavements is likely to be higher than the original mixture due to in service hardening of the binder. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. NOTE 7—Hammer shaft should be clean and lightly oiled. This method must be used as a referee method.
Size px x x x x We have no amendments or corrections for this standard. It is recommended that the standardization of dial thermometers be conducted more frequently by a comparison to a reference thermometric device of equal or greater readability at a temperature within the range of intended use. Hand mix to ensure uniformity and quarter into appropriate sample size to conform to specimen height requirements. Charge the mixing container with the heated aggregate and dry mix thoroughly approximately 5 s with scoop or spoon.
Please fill this form, we will try to respond as soon as possible. Mechanical hammers are available that operate at 1 nominal 55 blows per minute and 2 equal to or greater than 75 blows per minute. Your comments wstm invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
We are a non-profit group that run this website to share documents. For asphalt cements and tar mixtures, put the samples into metal containers and cover. For mixes prepared with cutback asphalt, introduce the mixing blade in the mixing bowl asrm determine the total weight of the mix components plus bowl and blade before proceeding with mixing. Apply the same number of compaction blows to the face of the reversed specimen.
Current edition approved June 15, The following types of hammer arrangements are included in this practice: Density and voids analysis are also conducted on specimens for mixture design and evaluation of field compaction. Any suitable extraction device such as a hydraulic jack apparatus or a lever arm device may be used, provided the specimens are not deformed during the extraction process. This practice is intended for use with laboratory and plant produced bituminous mixtures with aggregate up to 25 mm 1 in.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. For Marshall stability, and flow determination according to Practice D, use only those replicate specimens which have bulk specific gravities within If the document is revised or amended, you will be notified by email.
Cooling specimens in the mold can be facilitated by immersion in cold water. Users of this practice are cautioned that aatm with Specification D alone does not completely ensure reliable results. NOTE 2—Manual compaction hammers should be equipped with a finger safety guard. The steel cap shall be firmly fastened to the post.
Suitable shields, baffle plates, or sand baths shall be used on the surfaces of asrm hot plates to minimize localized overheating. Permission rights to photocopy the standard may also be secured from the ASTM website www. Place another piece of nonabsorbent paper cut to fit on top of the mix. At this point, the mixture temperature shall be within the limits of the mixing temperature established in 5.
Multiple hammer operation will affect specimen density and is not recommended. Any cut aggregate can be removed. Need more than one copy?
Best comparative results will be obtained by compacting all specimens with the same hammer and with no other hammers operating. Already Subscribed to this document. Add to Alert PDF. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.