1、Designation:D 3204 93(Reapproved 1998)Standard Specification forPreformed Cellular Plastic Joint Fillers for RelievingPressure1This standard is issued under the fixed designation D 3204;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision
2、,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 specification covers preformed pressure-relief jointfillers of the following two types made from cellula
3、r plasticmaterials having suitable compressibility and nonextrudingcharacteristics.1.1.1 Type I,closed cell polyethylene,and1.1.2 Type II,open cell polyurethane.1.2 These joint fillers are intended for use in concretepavements in full-depth joints measuring approximately 4.0 in.(102 mm)in width to r
4、elieve stress or avoid potential distressin adjacent structures or pavements.1.3 The values stated in inch-pound units are to be regardedas the standard.2.Referenced Documents2.1 ASTM Standards:D 545 Test Methods of Testing Preformed Expansion JointFillers for Concrete Construction(Nonextruding and
5、Re-silient Types)23.Terminology3.1 Definition of Term Specific to This Standard:3.1.1 pressure-relief jointsthose joints formed by theremoval of a full-depth section of existing pavement to relievedistress or avoid potential distress in adjacent structures orpavements.4.Manufacture4.1 Type I,Closed-
6、Cell PolyethyleneThese fillers shall bemade from foamed polyethylene material,and their preformedcross section shall be closed cell and homogeneous withoutlaminations.4.2 Type II,Open-Cell PolyurethaneThese fillers shall bemade from foamed polyurethane material,and their preformedcross section shall
7、 be semi-open cell,homogeneous withoutlaminations.5.Physical Requirements5.1 Compressibility:5.1.1 MinimumLoad required to compress test specimenby 25%(to 75%of original thickness)shall not be less than3 psi(21 kPa).5.1.2 MaximumLoad required to compress test specimenby 85%(to 15%of original thickne
8、ss)shall not be greaterthan 300 psi(2070 kPa).5.2 RecoveryAfter compressing the test specimen to 50%of its thickness before test,the load shall be released;and 10min after release of the load,the specimen shall have recoveredto at least 95%of its thickness before test.5.3 ExtrusionWhen a 1.0-in.(25-
9、mm)thick test specimenis compressed to 50%of its original thickness with three of itsedges restrained,the free edge shall extrude not more than 0.5in.(13 mm).5.4 Structural CharacteristicsPreformed pressure reliefjoint filler units shall have sufficient strength and resiliency towithstand on-the-job
10、 handling without breakage or permanentdeformation.6.Dimensions and Permissible Variations6.1 Preformed Type I pressure-relief joint filler units shallconform to dimensions as specified.6.1.1 Thickness:+10,0%.6.1.2 Depth:+0.8,0 in.(+20,0 mm).6.1.3 Length:+3.0,0 in.(+80,0 mm).6.2 Preformed Type II pr
11、essure-relief joint filler units shallconform to dimensions as specified.6.2.1 Thickness:65%.6.2.2 Depth:60.4 in.(610 mm).6.2.3 Length:+3.0,0 in.(+80,0 mm).7.Shape7.1 The cross-section shape shall be as agreed betweenpurchaser and supplier.8.Sampling8.1 Size of Samples Each sample shall consist of s
12、ufficientmaterial to provide at least ten test specimens measuring 4.5 by4.5 in.(115 by 115 mm),or as required by the user agency.Unless otherwise specified under applicable test method,test1This specification is under the jurisdiction of ASTM Committee D-4 on Roadand Paving Materials and is the dir
13、ect responsibility of Subcommittee D04.34 onPreformed Joint Fillers and Sealers.Current edition approved March 15,1993.Published May 1993.Originallypublished as D 3204 73.Last previous edition D 3204 86.2Annual Book of ASTM Standards,Vol 04.03.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harb
14、or Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTMspecimens shall be the same thickness as the joint filler units tobe installed.8.2 Number of SamplesSelect one representative samplefrom each shipment of material capable of filling 5000 linear ft(1500 m)
15、of pressure relief joint.9.Test Methods9.1 Determine the physical requirements prescribed in thisspecification under 5.2 and 5.3,in accordance with TestMethod D 545.9.2 Compressive Strength(5.1)Determine in accordancewith Method D 545 with the following exception:The com-pressive strength shall be d
16、etermined at deflections of 25 and85%.10.Inspection and Rejection10.1 Inspection of the material and selection of sample orsamples to be tested may be made either at the point ofshipment or at the point of delivery,as agreed upon.10.2 If a selected sample fails to conform to any of therequirements of this specification,select two additionalsamples from the same lot and test.Both retest samples shallmeet the requirements of this specification or the lot will berejected.11.Keywords11.1 cellular pl
