1、Designation:D362596 (Reapproved 2005) Designation: D3625 12Standard Practice forEffect of Water on Bituminous-Coated Aggregate UsingBoiling Water1This standard is issued under the fixed designation D3625; the number immediately following the designation indicates the year oforiginal adoption or, in
2、the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers a rapid procedure for visually observing the loss of adhesion i
3、n uncompacted bituminous-coatedaggregate mixtures due to the action of boiling water.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard. The values statedin each system may not be exact equivalents; therefore, each system shall be used indepen
4、dently of the other. Combining valuesfrom the two systems may result in non-conformance with the standard.1.3 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 an
5、d health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E1 Specification for ASTM Liquid-in-Glass ThermometersD979 Practice for Sampling Bituminous Paving Mixtures3. Summary of Practice3.1 Abituminous-coated aggregate mixtur
6、e sample is placed in a container of boiling distilled water and boiled for 10 min.Aftercooling the boiled mixture, visual observation is made of retained bitumen coating on the aggregate.4. Significance and Use4.1 This practice is useful as an indicator of the relative susceptibility of bituminous-
7、coated aggregate to water, but should notbe used as a measure of field performance because such correlation has not been established. If loss of adhesion due to water isindicated, testing by other procedures should be conducted to further evaluate the mixture.4.2 This practice should not be used for
8、 acceptance/rejection by owner agencies.5. Apparatus5.1 Scoop, shovel or other implement capable of removing a representative sample from a larger mass of bituminous-coatedaggregate mixture.5.2 Glass Beakers, heat-resistant, 10002000 mL capacity or suitable metal containers of similar dimensions and
9、 capacity.5.3 Source of Distilled Water (at least 500 mL (12 qt) for each test) (Note 1).NOTE 1Water that is not distilled has been shown to significantly affect results of the procedure and should not be used.5.4 Device for Heating Watergas burner with wire gauze supported on tripod or ring, hot pl
10、ate, camp stove or other suitabledevice which will distribute heat evenly.5.5 ThermometersASTM low-distillation thermometers graduated either in Celsius or Fahrenheit as specified, having a rangefrom2 to+300C from 2 to + 300C or 30 to 580F580F respectively, and conforming to the requirements for the
11、rmometer 7C or7F as prescribed in Specification E1. . Thermometric devices such as RTDs, thermistors or thermocouples with equal or betteraccuracy within the temperature range of thermometer 7C or 7F may be used1This practice is under the jurisdiction ofASTM Committee D04 on Road and Paving Material
12、s and is the direct responsibility of Subcommittee D04.22 on Effect of Waterand Other Elements on Bituminous- Coated Aggregates.Current edition approved Dec.June 1, 2005.2012. Published December 2005.July 2012. Originally approved in 1977. Last previous edition approved in 20012005 asD3625 96 (20015
13、). DOI: 10.1520/D3625-96R05.10.1520/D3625-12.2For 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.1This document is
14、 not an ASTM standard and is intended only 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 appropr
15、iate. In all cases only the current versionof 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 States.6. Sample Preparation6.1 Prepare an uncompacted bituminous-coate
16、d aggregate mixture following established laboratory procedures or obtain asample of plant-produced mixture in accordance with Practice D979. The temperature of hot mixtures shall be below the boilingtemperature of water, but not less than 85C (180F), before placing in boiling water. The temperature
17、 of mixtures that are coldmixed shall be at or above room temperature before placing in boiling water.7. Procedure7.1 For each sample tested pour distilled water into a clean container (as described in 5.2) such that the container isapproximately half full and heat to boiling.7.2 With an appropriate
18、 implement (as described in 5.1) place approximately 250 g (12 lb) of the bituminous-coated aggregatemixture in the boiling water while the container is exposed to the heat source. Bring the water back to boiling and maintain boilingfor 10 min 6 15 s. Avoid excessive manipulation of the bituminous-c
19、oated aggregate mixture.7.3 At the end of 10 min, remove the container from the heat source. Skim off any free bitumen from the surface of the waterto prevent recoating. Cool to room temperature, decant the water, and empty the wet mix onto a white paper towel.NOTE 2For comparison, a similar amount
20、of fresh bituminous-coated aggregate mixture should be placed into a second container, covered withunheated distilled water for 10 min, the water decanted and the mixture emptied onto a white paper towel.7.4 Visually observe the aggregate (coarse and fine) for retained bitumen coating. Any thin, bro
21、wnish, translucent areas are tobe considered fully coated. Visual observations shall be made immediately after the sample is placed on the white paper towel(Note 3). Examination of the sample under a light and with low magnification may aid in the visual observation of retained coating.NOTE 3Additio
22、nal information can be obtained by repeating the visual observation 24 h after boiling when the sample has dried and the effects ofmoisture on the coating appearance of the sample have been eliminated.8. Hazards8.1 WarningMercury has been designated by EPA and many state agencies as a hazardous mate
23、rial that can causecentral nervous system, kidney and liver damage. Mercury, or its vapor, may be hazardous to health and corrosivetomaterials. Caution should be taken when handling mercury and mercury containing products. See the applicable productMaterial Safety Data Sheet (MSDS) for details and E
24、PAs website (www.epa.gov/mercury/faq.htm) for additionalinformationUsers should be aware that selling mercury or mercury containing products (or both) into your state may be prohibitedby state law.9. Keywords89.1 bituminous paving mixtures; coating/stripping; loss of adhesion; waterASTM Internationa
25、l takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their o
26、wn responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be a
27、ddressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,
28、at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D3625 122
