1、Designation: D 3625 96 (Reapproved 2005)Standard Practice forEffect of Water on Bituminous-Coated Aggregate UsingBoiling Water1This standard is issued under the fixed designation D 3625; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers a rapid procedure for visuallyobserving the loss of adhesion in uncompacted bitu
3、minous-coated aggregate mixtures due to the action of boiling water.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the a
4、pplica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E1 Specification for ASTM ThermometersD 979 Practice for Sampling Bituminous Paving Mixtures3. Summary of Practice3.1 A bituminous-coated aggregate mixture sample isplaced in a container of boiling distil
5、led water and boiled for 10min. After cooling the boiled mixture, visual observation ismade of retained bitumen coating on the aggregate.4. Significance and Use4.1 This practice is useful as an indicator of the relativesusceptibility of bituminous-coated aggregate to water, butshould not be used as
6、a measure of field performance becausesuch correlation has not been established. If loss of adhesiondue to water is indicated, testing by other procedures should beconducted to further evaluate the mixture.4.2 This practice should not be used for acceptance/rejection by owner agencies.5. Apparatus5.
7、1 Scoop, shovel or other implement capable of removinga representative sample from a larger mass of bituminous-coated aggregate mixture.5.2 Glass Beakers, heat-resistant, 10002000 mL capacityor suitable metal containers of similar dimensions and capacity.5.3 Source of Distilled Water (at least 500 m
8、L (12 qt) foreach test) (Note 1).NOTE 1Water that is not distilled has been shown to significantlyaffect results of the procedure and should not be used.5.4 Device for Heating Watergas burner with wire gauzesupported on tripod or ring, hot plate, camp stove or othersuitable device which will distrib
9、ute heat evenly.5.5 Thermometers ASTM low-distillation thermometersgraduated either in Celsius or Fahrenheit as specified, having arange from 2 to + 300C or 30 to 580F respectively, andconforming to the requirements for thermometer 7C or 7F asprescribed in Specification E1.6. Sample Preparation6.1 P
10、repare an uncompacted bituminous-coated aggregatemixture following established laboratory procedures or obtaina sample of plant-produced mixture in accordance with Prac-tice D 979. The temperature of hot mixtures shall be below theboiling temperature of water, but not less than 85C (180F),before pla
11、cing in boiling water. The temperature of mixturesthat are cold mixed shall be at or above room temperaturebefore placing in boiling water.7. Procedure7.1 For each sample tested pour distilled water into a cleancontainer (as described in 5.2) such that the container isapproximately half full and hea
12、t to boiling.1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.22 on Effectof Water and Other Elements on Bituminous-Coated Aggregates.Current edition approved Dec. 1, 2005. Published December 2005. Origina
13、llyapproved in 1977. Last previous edition approved in 2001 as D 3625 96 (2001).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page
14、onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 With an appropriate implement (as described in 5.1)place approximately 250 g (12 lb) of the bituminous-coatedaggregate mixture in the boiling water while the cont
15、ainer isexposed to the heat source. Bring the water back to boiling andmaintain boiling for 10 min 6 15 s. Avoid excessive manipu-lation of the bituminous-coated aggregate mixture.7.3 At the end of 10 min, remove the container from the heatsource. Skim off any free bitumen from the surface of the wa
16、terto prevent recoating. Cool to room temperature, decant thewater, and empty the wet mix onto a white paper towel.NOTE 2For comparison, a similar amount of fresh bituminous-coatedaggregate mixture should be placed into a second container, covered withunheated distilled water for 10 min, the water d
17、ecanted and the mixtureemptied onto a white paper towel.7.4 Visually observe the aggregate (coarse and fine) forretained bitumen coating.Any thin, brownish, translucent areasare to be considered fully coated. Visual observations shall bemade immediately after the sample is placed on the white papert
18、owel (Note 3). Examination of the sample under a light andwith low magnification may aid in the visual observation ofretained coating.NOTE 3Additional information can be obtained by repeating thevisual observation 24 h after boiling when the sample has dried and theeffects of moisture on the coating
19、 appearance of the sample have beeneliminated.8. Keywords8.1 bituminous paving mixtures; coating/stripping; loss ofadhesion; waterASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard a
20、re expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not
21、 revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which y
22、ou 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, 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).D 3625 96 (2005)2
