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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These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard. Permission rights to photocopy the standard may also be secured from the ASTM website www. For mixes prepared with cutback asphalt, introduce the mixing blade in the mixing bowl and determine r6926 total weight of the mix components plus bowl and blade before proceeding with mixing.
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The following types of hammer arrangements are included in this practice:. Significance and Use 3. In preparation for heating to compaction temperature the material should be warmed and worked until a loose mixture condition is obtained. Armored-glass or dial-type thermometers with metal stems are recommended. An example of a viscosity temperature chart is given in Fig.
After cooling, separate the aggregates by dry-sieving into the desired size fractions. We need your help! If you atsm that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Hand mix to ensure uniformity and quarter into appropriate sample size to conform to asgm height requirements.
The reheating process will have only minor influence on binder hardening. The steel disk is used for extracting compacted specimens from molds with the use of the mold collar.
The steel cap shall be firmly fastened to the post. Please copy and paste this embed script to where you want to embed Embed Script. Apply the same number of compaction blows asmt the face of the reversed specimen. The compaction temperature for a cutback asphalt mixture is selected using a compositional chart of viscosity versus percent solvent for that cutback asphalt.
If the document is revised or amended, you will be notified by email. There may or may not be a constant surcharge on top of the hammer handle. You can download and open this file to your own computer but DRM prevents opening ashm file on another computer, including a networked server. In this original Marshall procedure, no mechanical device of any kind shall be used to restrict the handle of the hammer in the vertical position during compaction.
Place a piece of nonabsorbent paper, cut to size, in the bottom of the mold astmm the mixture is introduced. Standards Subsctiption may be the perfect solution. Remove the base plate and collar and reverse and reassemble the mold.
Reliable results depend on many factors; asfm the suggestions of Specification D or some similar acceptable guideline provides a means of evaluating and controlling some 6d926 those factors. Mechanical hammers are available that operate at 1 nominal 55 blows per minute and 2 equal to or greater than 75 blows per minute. D696 to Alert PDF. Form a crater in the dry blended aggregate and weigh the required amount of bituminous material at mixing temperature into the mixture.
To facilitate extraction, the mold and specimen can be briefly immersed in a hot water bath to heat the metal mold and reduce specimen distortion. Dial thermometer may exhibit inaccuracies due to frequently use or mishandling. Users of this practice are cautioned that compliance with Specification D alone does not completely ensure reliable results.
ASTM D – 10 Standard Practice for Preparation of Bituminous Specimens Using Marshall Apparatus
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. The compaction temperature is determined from the viscosity temperature chart as that to which the cutback asphalt must be heated to produce a viscosity of 6 30 cP 0.
Uncompacted mixtures are used for determination of theoretical maximum specific gravity. Any cut aggregate can be removed.