ASTM C1645-2006 Standard Test Method for Freeze-thaw and De-icing Salt Durability of Solid Concrete Interlocking Paving Units《铺路用实心混凝土内嵌单元的防水盐耐久性和解冻的标准试验方法》.pdf
《ASTM C1645-2006 Standard Test Method for Freeze-thaw and De-icing Salt Durability of Solid Concrete Interlocking Paving Units《铺路用实心混凝土内嵌单元的防水盐耐久性和解冻的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C1645-2006 Standard Test Method for Freeze-thaw and De-icing Salt Durability of Solid Concrete Interlocking Paving Units《铺路用实心混凝土内嵌单元的防水盐耐久性和解冻的标准试验方法》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 1645 06Standard Test Method forFreeze-thaw and De-icing Salt Durability of Solid ConcreteInterlocking Paving Units1This standard is issued under the fixed designation C 1645; the number immediately following the designation indicates the year oforiginal adoption or, in the case of rev
2、ision, 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 test method covers the resistance to freezing andthawing of solid interlocking concrete pavin
3、g units conformingto the dimensional requirements of Specification C 936. Unitsare tested in a test solution that is either water or 3 % salinesolution, depending on the intended use of the units in actualservice.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard d
4、oes not purport to address all of thesafety concerns, in any, associated with its use. It is theresponsibility of the use of this standard to establish appropri-ate safety and health practices and determine the applicabilityof regulatory limitation prior to use.2. Referenced Documents2.1 ASTM Standa
5、rds:2C 936 Specification for Solid Concrete Interlocking PavingUnits3. Significance and Use3.1 This test method is intended to determine the effects offreezing and thawing on units conforming to the dimensionalrequirements of Specification C 936 while immersed in a testsolution. Other types of segme
6、ntal concrete paving units thatdo not conform to the dimensional requirements of Specifica-tion C 936 may be tested using this method.3.2 The results from this test method are not intended toprovide a quantitative measure of the length of service frompaving units conforming to the dimensional requir
7、ements ofSpecification C 936.4. Apparatus4.1 Freezing-and-Thawing ApparatusThe freezing appa-ratus shall consist of suitable cabinet or cold room withcontrols to reach and maintain an air temperature of 5 6 3C(23 6 5F) within1hofintroduction of specimens. Thethawing chamber shall maintain a controll
8、ed air temperature.This temperature shall never be greater than + 30C (86F).4.2 BalanceA balance capable of weighing 500 g with anaccuracy of 6 0.1 g shall be used for measuring the mass of thefine spalled material.4.3 OvenThe oven shall be vented and capable of beingmaintained at 60 6 2C (140 6 4F)
9、.4.4 Specimen ContainerThe specimen container shall bemade of non-corroding flexible material and have dimensionsthat allow complete submersion of the specimen in the testsolution. The size of the container shall be less than or equal tothree times the volume of the unit that is being tested. Thecon
10、tainer shall prevent evaporation of the test solution.5. Sampling5.1 Selection of Test SpecimensSelect whole units repre-sentative of the lot from which they are selected. The unitsshall be free from visible cracks, chipped edges, and structuraldefects.5.2 Number of Test SpecimensSample according to
11、 therequirements of Specification C 936.5.3 IdentificationMark each test specimen so that it isidentifiable at any time.6. Preparation of Test Specimens6.1 Curing and ConditioningTest specimens shall consistof full size units, a minimum of 28 days old.After sampling, alltest specimens shall be cured
12、 for 14 days in a moist chamber(cabinet or room) at an air temperature of 23 6 2C (73 6 4F)and a relative humidity of at least 90 %. Moist curing shall befollowed by air curing for a minimum of 14 days at 23 6 5C(73 6 9F) at a minimum 40 % relative humidity.6.1.1 After air curing, specimens then sha
13、ll be oven condi-tioned for 48 h 6 2hat606 2C (140 6 4F).1This specification is under the jurisdiction ofASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.20 onArchitectural and Structural Products.Current edition approved on June 1, 2006. Published
14、June 2006.2For 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 onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Driv
15、e, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.2 Before testing begins, the specimens shall be brushedclean with a stiff bristled brush and all loose burrs and edgeshards shall be removed with a carborundum stone.7. Procedure7.1 Freezing and Thawing CyclesOne freeze-thaw cyclesh
16、all be completed every 24 h. The cycle shall consist of 16 61 h of freezing followed by 8 6 1 h of thawing. The specimensshall be subjected to continuous cycles. If for reasons beyondthe operators control, a freezing period cannot commence atthe specified time, the specimens shall remain in a thawed
17、condition until conditions are suitable for resumption of thetest. The specimen temperature shall conform to 5 6 3C (236 5F) for the last2hofthefreezing cycle and a minimum of+5 C (40F) for the last 1 h of the thawing cycle. Thetemperature shall be recorded at least every 15 min with atemperature pr
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