ASTM D6857 D6857M-2017 red 8750 Standard Test Method for Maximum Specific Gravity and Density of Asphalt Mixtures Using Automatic Vacuum Sealing Method《采用自动真空密封法测定沥青混合料最大比重和密度的标准试验.pdf
《ASTM D6857 D6857M-2017 red 8750 Standard Test Method for Maximum Specific Gravity and Density of Asphalt Mixtures Using Automatic Vacuum Sealing Method《采用自动真空密封法测定沥青混合料最大比重和密度的标准试验.pdf》由会员分享,可在线阅读,更多相关《ASTM D6857 D6857M-2017 red 8750 Standard Test Method for Maximum Specific Gravity and Density of Asphalt Mixtures Using Automatic Vacuum Sealing Method《采用自动真空密封法测定沥青混合料最大比重和密度的标准试验.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D6857/D6857M 11D6857/D6857M 17Standard Test Method forMaximum Specific Gravity and Density of BituminousPaving Asphalt Mixtures Using Automatic Vacuum SealingMethod1This standard is issued under the fixed designation D6857/D6857M; the number immediately following the designation indicat
2、es theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of
3、maximum specific gravity of and density of uncompacted bituminous pavingasphalt mixtures at 25C 77F.25 C 77 F.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem may not be exact equivalent; therefore, each system sh
4、all be used independently of the other. Combining values from thetwo systems may result in non-conformancenonconformance with the standard.1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes(excluding those in tables and figures)
5、 shall not be considered as requirements of the standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicabilit
6、y of regulatorylimitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Tra
7、de Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction MaterialsD979D979/D979M Practice for Sampling Bituminous Paving MixturesD2041D2041/D2041M Test Method for
8、 Theoretical Maximum Specific Gravity and Density of Bituminous Paving MixturesD3666 Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving MaterialsD4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and Const
9、ructionMaterials TestingE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test MethodE1547 Terminology Relating to Industrial and Specialty ChemicalsD3666 Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving Materials3. Termin
10、ology3.1 The terms specific gravityspecific gravity and densitydensity used in this test method are in accordance with theTerminology E1547.3.2 Definitions:3.2.1 density, as determined by this test methodthe mass of a cubic meter of the material at 25C25 C in SI units, or the massof a cubic foot of
11、the material at 77F77 F in inch-pound units.3.2.2 residual pressure, as employed by this test methodthe pressure in a vacuum chamber when vacuum is applied.1 This test method is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee
12、 D04.21 on SpecificGravity and Density of BituminousAsphalt Mixtures.Current edition approved June 1, 2011June 1, 2017. Published July 2011June 2017. Originally approved in 2003. Last previous edition approved in 20092011 asD6857 09.D6857/D6857M 11. DOI: 10.1520/D6857_D6857M-11.10.1520/D6857_D6857M-
13、17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only
14、 to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versio
15、nof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.3 specific gravity, as determined by this test methodthe ratio of a given mass of material at 25C 77F2
16、5 C 77 F tothe mass of an equal volume of water at the same temperature.4. Summary of Test Method4.1 Aweighed sample of oven-dry pavingasphalt mixture in the loose condition at room temperature is placed inside a speciallydesigned channel bag. The bag containing the sample is placed inside another b
17、ag and placed inside a vacuum chamber. Air isevacuated from the sample to an absolute pressure of 6.0 mm Hg 6 Torr and is automatically sealed. The bags containing thesample are removed from the vacuum chamber and placed inside a large water tank equipped with scales for weighing the sampleunder wat
18、er. While completely submerged, the bag is cut open by scissors to allow the water to enter the bag. Since the sampleis under complete vacuum, water will be forced around all the accessible areas of the sample. The difference in weight in air andsuspended weight in water will provide the sample volu
19、me after correcting for the bag influence. The dry weight and the volumecan be used to calculate the maximum specific gravity of the sample. This method is a rapid technique for determination ofmaximum specific gravity that minimizes the exposure of bituminous asphalt mixture samples to water during
20、 testing and reducesthe chance of water absorption.NOTE 1For porous aggregates, if water absorption correction is not performed on the maximum specific gravities obtained using this test method,the results may be higher than the results obtained by Test Method D2041D2041/D2041M. Without aggregate wa
21、ter absorption correction, air voidscalculated based on these results may be higher.5. Significance and Use5.1 The maximum specific gravities and densities of bituminous paving asphalt mixtures are intrinsic properties whose valuesare influenced by the composition of the mixture in terms of types an
22、d amounts of aggregates and bituminousasphalt materials.5.1.1 They are used to calculate values for percent air voids in compacted bituminous paving asphalt mixtures.5.1.2 They provide target values for the compaction of pavingasphalt mixtures.5.1.3 They are essential when calculating the amount of
23、bitumen asphalt binder absorbed by the internal porosity of theindividual aggregate particles in a bituminous paving an asphalt mixture.NOTE 2The personnel and equipment used in performing quality of the results produced by this standard are dependent on the competence of thepersonnel performing the
24、 procedure and the capability, calibration, and maintenance of the equipment used.Agencies that meet the criteria of SpecificationD3666this test can be evaluated in accordance with Practice are generally considered capable of competent and objective testing, sampling, inspection,etc. Users of this s
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