1、Designation: D 1075 07American Association StateHighway and Transportation Officials StandardAASHTO No.: T165Standard Test Method forEffect of Water on Compressive Strength of CompactedBituminous Mixtures1This standard is issued under the fixed designation D 1075; the number immediately following th
2、e designation indicates the year oforiginal adoption or, in the case of revision, 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.This standard has been approved for
3、 use by agencies of the Department of Defense.1. Scope1.1 This test method covers measurement of the loss ofcompressive strength resulting from the action of water oncompacted bituminous mixtures containing asphalt cement. Anumerical index of reduced compressive strength is obtainedby comparing the
4、compressive strength of freshly molded andcured specimens with the compressive strength of duplicatespecimens that have been immersed in water under prescribedconditions.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility
5、of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD
6、 1074 Test Method for Compressive Strength of Bitumi-nous MixturesD 2726 Test Method for Bulk Specific Gravity and Densityof Non-Absorptive Compacted Bituminous MixturesD 6752 Test Method for Bulk Specific Gravity and Densityof Compacted Bituminous Mixtures Using AutomaticVacuum Sealing Method3. Sig
7、nificance and Use3.1 This test method is useful as an indicator of thesusceptibility to moisture of compacted bitumen-aggregatemixtures.4. Apparatus4.1 One or more automatically controlled water baths shallbe provided for immersing the specimens. The baths shall be ofsufficient size to permit total
8、immersion of the test specimens.They shall be so designed and equipped as to permit accurateand uniform control of the immersion temperature within61C (1.8F). They shall be constructed of or lined withcopper, stainless steel, or other nonreactive material. The waterused for the wet storage of the sp
9、ecimens shall be eitherdistilled or otherwise treated to eliminate electrolytes and thebath shall be emptied, cleaned, and refilled with fresh water foreach series of tests.4.2 A manually or automatically controlled water bath alsoshall be provided for bringing the immersed specimens to thetemperatu
10、re of 25 6 1C (77 6 1.8F) for the compressiontest. Any convenient pan or tank may be used provided it is ofsufficient size to permit total immersion of the specimens.4.3 A balance and a water bath with suitable accessoryequipment will be required for weighing the test specimens inair and in water in
11、 order to determine their densities, theamount of absorption, and any changes in specimen volumeresulting from the immersion test.4.4 A supply of flat transfer plates of glass or othernon-reactive material will be required. One of these plates shallbe kept under each of the specimens during the imme
12、rsionperiod and during subsequent handling, except when weighingand testing, in order to prevent breakage or distortion of thespecimens.5. Test Specimens5.1 At least six 101.6 by 101.6-mm (4 by 4-in.) cylindricalspecimens shall be made for each test. The procedures de-scribed in Test Method D 1074 s
13、hall be followed in preparingthe loose mixtures and in molding and curing the test speci-mens.NOTE 1This test method was developed to measure the loss ofcompressive strength due to water for specimens designed at approxi-mately 6 % air voids by the compaction procedures of Test MethodD 1074. When us
14、ed with mixtures designed by other test methods, it ispossible that the specimens will be compacted to some other void level1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.22 onEffect of Water and Othe
15、r Elements on Bituminous Coated Aggregates.Current edition approved Feb. 15, 2007. Published March 2007. Originallyapproved in 1949. Last previous edition approved in 2000 as D 1075 96 (2005).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at ser
16、viceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.which may influence the results. Some agencies have es
17、tablished an airvoid or percent density target to which the specimens should be com-pacted. This is accomplished by adjusting the loading in the Molding andCuring Test Specimens Section of Test Method D 1074.6. Determination of Bulk Specific Gravity of TestSpecimens6.1 Allow each set of six test spe
18、cimens to cool for at least2 h after removal from the curing oven described in TestMethod D 1074. Determine the bulk specific gravity of eachspecimen in accordance with the procedure (thoroughly dryspecimens) and calculation (bulk specific gravity) sections ofTest Method D 2726 or Test Method D 6752
19、.NOTE 2The calculation of air voids may be dependent on the testmethod used to determine the bulk specific gravity of the compactedsample.7. Procedure7.1 Sort each set of six test specimens into two groups ofthree specimens each so that the average bulk specific gravityof the specimens in Group 1 is
20、 essentially the same as forGroup 2. Test the specimens in Group 1 as described in 7.1.1.Test the specimens in Group 2 as described in 7.1.2 unless thealternative procedure described in 7.1.3 is specified.7.1.1 Group IBring the test specimens to the test tempera-ture 25 6 1C (77 6 1.8F), by storing
21、them in an air bathmaintained at the test temperature for not less than 4 h anddetermine their compressive strengths in accordance with TestMethod D 1074.7.1.2 Group 2Immerse the test specimens in water for24hat606 1C (140 6 1.8F). Transfer them to the secondwater bath maintained at 25 6 1C (77 6 1.
22、8F) and storethem there for 2 h. Determine the compressive strength of thespecimens in accordance with Test Method D 1074.7.1.3 Group 2, Alternative ProcedureImmerse the testspecimens in water for four days at 49 6 1C (120.2 6 1.8F).Transfer them to the second water bath maintained at 25 6 1C(77 6 1
23、.8F) and store them there for 2 h. Determine thecompressive strength of the specimens in accordance with TestMethod D 1074.8. Calculation8.1 Calculate the numerical index of resistance of bitumi-nous mixtures to the detrimental effect of water as thepercentage of the original strength that is retain
24、ed after theimmersion period as follows:Index of retained strength, % 5 S2/S1! 3 100 (1)where:S1= compressive strength of dry specimens (Group 1),andS2= compressive strength of immersed specimens (Group2).9. Precision and Bias9.1 Single-Operator PrecisionThe single-operator stan-dard deviation has b
25、een found to be 6 % (see Note 3).Therefore, results of two properly conducted tests by the sameoperator on the same material should not differ by more than18 % (see Note 3).NOTE 3These numbers represent, respectively, the (1s) and (d2s)limits as described in ASTM Practice C 670.9.2 Multilaboratory P
26、recisionThe multilaboratory stan-dard deviation has been found to be 18 % (see Note 3).Therefore, results of two properly conducted tests from twodifferent laboratories on identical samples of the same materialshould not differ by more than 50 % (see Note 3).10. Keywords10.1 bituminous paving mixtur
27、es; compression testing;moisture; 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 are expressly advised that determination of the validity of any such patent rights, and the
28、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 revised, either reapproved or withdrawn. Your comments are invited either for revision of
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30、ke 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).D1075072
