1、Designation: D1985 13Standard Practice forPreparing Concrete Blocks for Testing Sealants, for Jointsand Cracks1This standard is issued under the fixed designation D1985; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast 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 the preparation of concrete blocksused for testing of joint and crack sealants for portland cement
3、concrete and asphaltic concrete pavements. There are numer-ous standard material specifications that use concrete blocksprepared according to this practice. Refer to the specificstandard material specification of interest to determine whichtests apply and refer to the test methods for each specific
4、test.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are provided forinformation purposes only.1.3 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 st
5、andard 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:2C33 Specification for Concrete AggregatesC150 Specification for Portland CementC192/C192M Practice for Making and Curing Con
6、crete TestSpecimens in the LaboratoryE171 Practice for Conditioning and Testing Flexible BarrierPackaging3. Significance and Use3.1 It is intended that this practice may be used bymanufacturers, users, and testing agencies. The use of thispractice establishes a uniform procedure for preparing concre
7、teblocks for the testing of sealants. It is not intended to establishtest procedures or conditions of test which are associated witheach of the joint sealants.4. Standard Conditions4.1 The laboratory atmospheric conditions, hereinafter re-ferred to as standard conditions, shall be in accordance with
8、Specification E171, (23 6 2C (73.4 6 3.6F) and 50 % 6 5%relative humidity).5. Concrete Block Preparation35.1 MaterialsThe aggregate shall conform to Specifica-tion C33, except as specified herein. The aggregate gradingshall be as shown in Table 1. The coarse aggregate shall consistof crushed limesto
9、ne (plus 95 % CaCO3) having a waterabsorption of not more than 1.5 %. The fine aggregate shallconsist of crushed limestone and shall be manufactured fromthe same parent rock as the coarse aggregate.4The portlandcement shall conform to ASTM Specification C150, Type II.The concrete shall have a water-
10、cement ratio of 0.49, a cementfactor of 335 6 30 kg/m3(6.0 6 0.5 bags of cement per cubicyard), and a slump of 63 6 13 mm (212 612 in.). The ratio offine aggregate to total aggregate shall be approximately 40 %by solid volume. The air content shall be 5.0 6 0.5 % and shallbe obtained by the addition
11、 to the batch of an air-entrainingagent. Prepare the concrete in accordance with the proceduredescribed in Test Method C192/C192M.5.1.1 Alternate Block MaterialsAs an alternate to thematerials specified in 5.1, the blocks may be prepared using aconcrete mixture which meets local requirements for con
12、cretepavements. Use the materials specified in 5.1 for all refereetesting.5.2 Block PreparationUse a minimum 100 mm by 300mm by 75 mm (4 in. wide by 12 in. long by 3 in. deep) mold,1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibi
13、lity of Subcommittee D04.33 onFormed In-Place Sealants for Joints and Cracks in Pavements.Current edition approved July 1, 2013. Published August 2013. Originallyapproved in 1991. Last previous edition approved in 2008 as D1985 03 (2008).DOI: 10.1520/D1985-13.2For referenced ASTM standards, visit th
14、e 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.3The sole source of supply of blocks made to this specification are availablefrom USAE Laboratory, Mi
15、ssouri River Division, 429 S18th Street, Omaha, NE68101. If you are aware of alternative suppliers, please provide this information toASTM International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1which you may attend.4The sole
16、 source of supply of aggregate meeting this specification is availablefrom Pete Lien 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/).TABLE 1 Aggregate GradingType Sieve Size % PassingCoarse agg
17、regate 19.0 mm (34 in.) 97 to 10012.5mm(12 in.) 63 to 699.5mm(38 in.) 30 to 364.75 mm (No. 4) 0 to 3Fine aggregate 4.75 mm (No. 4) 1002.36 mm (No. 8) 82 to 881.18 mm (No. 16) 60 to 70600 mm (No. 30) 40 to 50300 mm (No. 50) 16 to 26150 mm (No. 100) 5 to 9FIG. 1 Concrete Block Slab (after removal from mold)D1985 132
