1、Designation: D 1985 03Standard Practice forPreparing Concrete Blocks for Testing Sealants, for Jointsand Cracks1This standard is issued under the fixed designation D 1985; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、 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 the preparation of concrete blocksused for testing of joint and crack sealants for portland cem
3、entconcrete 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 specif
4、ic test.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 applica-bility of regulatory limitations prior to use.1.3 The
5、 values stated in SI units are to be regarded as thestandard. The values given in parentheses are provided forinformation purposes only.2. Referenced Documents2.1 ASTM Standards:C 33 Specification for Concrete Aggregates2C 150 Specification for Portland Cement3C 192/C 192M Practice For Making and Cu
6、ring ConcreteTest Specimens in the Laboratory2E 171 Specification for Standard Atmospheres for Condi-tioning and Testing Flexible Barrier Materials43. Significance and Use3.1 It is intended that this practice may be used by manu-facturers, users, and testing agencies. The use of this practiceestabli
7、shes a uniform procedure for preparing concrete blocksfor the testing of sealants. It is not intended to establish testprocedures or conditions of test which are associated with eachof the joint sealants.4. Standard Conditions4.1 The laboratory atmospheric conditions, hereinafter re-ferred to as sta
8、ndard conditions, shall be in accordance withSpecification E 171, (23 6 2C (73.4 6 3.6F) and 50 % 65 % relative humidity).5. Concrete Block Preparation55.1 MaterialsThe aggregate shall conform to Specifica-tion C 33, except as specified herein. The aggregate gradingshall be as shown in Table 1. The
9、coarse aggregate shall consistof crushed limestone (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.6The portlandcement shall conform to ASTM Specificatio
10、n C 150, Type II.The concrete shall have a water-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
11、 5.0 6 0.5 % and shallbe obtained by the addition to the batch of an air-entrainingagent such as a neutralized thermoplastic resin.7Prepare theconcrete in accordance with the procedure described in TestMethod C 192/C 192M.5.1.1 Alternate Block MaterialsAs an alternate to thematerials specified in 5.
12、1, the blocks may be prepared using aconcrete mixture which meets local requirements for concretepavements. 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,made from metal or plastic
13、and provided with a metal or plasticbase plate. Provide means for securing the base plate to themold. Make the assembled mold and base plate water-tight andoil with mineral oil before use. Fill the mold with concrete,prepared in accordance with 5.1 or 5.1.1, to overflowing and1This practice is under
14、 the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.33 onFormed-in-Place Sealants for Joints and Cracks in Pavements.Current edition approved July 10, 2003. Published September 2003. Originallyapproved in 1991. Last previous editio
15、n approved in 1997 as D 1985 91 (1997).2Annual Book of ASTM Standards, Vol 04.02.3Annual Book of ASTM Standards, Vol 04.01.4Annual Book of ASTM Standards, Vol 15.09.5Blocks made to this specification are available from USAE Laboratory,Missouri River Division, 429 S18th Street, Omaha, NE 68101.6Aggre
16、gate meeting this specification is available from Pete Lien or through the ASTM website(www.astm.org).TABLE 1 Aggregate GradingType Sieve Size % PassingCoarse aggregate 19.0 mm (34 in.) 97 to 10012.5 mm (12 in.) 63 to 699.5 mm (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)D1985032
