1、Designation: D 5361 06Standard Practice forSampling Compacted Bituminous Mixtures for LaboratoryTesting1This standard is issued under the fixed designation D 5361; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last re
2、vision. 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 describes a procedure for removal of asample of compacted bituminous mixture from a pavement forlaboratory tes
3、ting.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.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 standard to establis
4、h appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 979 Practice for Sampling Bituminous Paving MixturesD 3665 Practice for Random Sampling of ConstructionMaterials3. Significance and Use3.1 S
5、amples obtained in accordance with the proceduregiven in this practice may be used to measure pavementthickness, density, resilient or dynamic modulus, tensilestrength, Marshall or Hveem stability, or for extraction testing,to determine asphalt content, asphalt properties and mixgradation.4. Apparat
6、us4.1 To minimize distortion of the compacted bituminouscourse(s), power equipment shall be used to secure the sample.The equipment may be either a core drill or power saw.4.2 The cutting edge of the core drill bit shall be of hardenedsteel or other suitable material with diamond chips embeddedin th
7、e metal cutting edge.4.3 Saw blades used in a power saw shall be either ahardened metal blade with diamond chips embedded or anabrasive blade such as carborundum or similar material.4.4 A source of cooling water, dry ice, liquid nitrogen, orother cooling material is normally required but in some cas
8、esmay be omitted when only a single sample is to be secured. Atany time there is evidence of damage to the edge of the sampledue to the generation of heat caused by friction, a coolingmaterial shall be applied to the cutting tool or to the pavementsurface to minimize sample distortion or other damag
9、e.4.5 A device (core debonder) for separating core samplesfrom underlying layers is not required to be used. If suchdevice is employed, it shall be a metal semicircle with an insideradius equal to the outside radius of the core and shall have arigidly attached handle. A split core barrel of the requ
10、iredradius cut in half vertically and welded to a strap iron handleis suitable for this purpose. (See Fig. 1.)NOTE 1Differences in manufacturers tolerances of core barrelsdiameters and thicknesses may result in a particular barrel not fitting intothe kerf. In such cases, other means may have to be u
11、sed for debonding.4.6 A lifting device (core lifter) for removing core samplesfrom holes will preserve the integrity of the core. The deviceshall be a steel rod of suitable length and with a diameter thatwill fit into the space between the core and the pavementmaterial. There shall be a 90 bend at t
12、he top to form a handleand a 90 bend at the bottom, approximately 50 mm (2 in.)long, to form the lifter.5. Sampling5.1 Take samples in accordance with the provisions ofPractice D 979. Random sampling procedures as outlined inPractice D 3665 shall be followed when samples obtained willbe used in cond
13、ucting quality control/quality assurance tests.5.2 The sampling plan must include a clear definition as towhether samples shall be taken adjacent to the pavement edgeor construction joints where density may be slightly lower thanin the main portion of the paving lane.1This practice is under the juri
14、sdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.30 onMethods of Sampling.Current edition approved Aug. 1, 2006. Published August 2006. Originallyapproved in 1993. Last previous edition approved in 2005 as D 5361 05.2For referenced ASTM
15、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 Drive, PO Box C700, West Conshohock
16、en, PA 19428-2959, United States.NOTE 2Variations in the pavement condition that can be detected byvisual inspection may dictate that samples be taken from areas soidentified, apart from the random sampling plan. However, non-randomsamples violate the principles behind statistically based quality co
17、ntrol/quality assurance testing programs. Samples obtained using non-randomprocedures must be used for informational purposes only and not includedin statistically based quality control/quality assurance programs.5.3 The number of samples to be secured will be inaccordance with governing specificati
18、ons for the lot sizeinvolved. When no specific guidelines are available, take asufficient number of samples to achieve the desired statisticalconfidence level.6. Sampling Compacted Bituminous Pavement6.1 Samples taken from the compacted pavement by coredrill shall have a minimum nominal diameter of
19、100 mm (4-in.)and extend the full depth of the lift(s) being sampled. If testresults appear to be erratic or biased in a way attributable tosample size, take larger samples. In order to minimize damage,use a lifting device as described in 4.5 and 4.6 to remove thecore from the hole.6.1.1 When cored
20、samples are to be used for resilient ordynamic modulus tests, the sample must form a right cylinderwith the top and bottom perpendicular to the axis. The sampleshall comply with the requirements of the particular testmethod involved.6.1.2 To separate the sample from the underlying layer,insert the d
21、evice described in 4.5 into the kerf and exert agentle pressure toward the sample. Do not attempt to pryupward on the sample. If the bond is not broken between thepavement courses, it will be necessary to secure a sample forthe entire pavement depth.6.1.3 To remove the sample from the hole, insert t
22、he devicedescribed in 4.6 into the kerf, turn the device approximately90, and lift gently until the sample can be grasped by hand.6.2 Samples taken from the compacted pavement by sawingshall have a minimum surface area of 10 000 mm2(16 in.2) andbe cut in such a manner as not to disturb the sample de
23、nsity.Cutting and removing a 50 mm (2-in.) wide section surround-ing the sample will aid in removal of the portion(s) to be tested.Screwdrivers, chisels, and other sharpened tools used to breakthe bond between a compacted course and the underlyingpavement may cause distortion that will result in an
24、erroneousdensity determination. If test results appear to be erratic orbiased in a way attributable to sample size, take larger samples.6.3 Transport samples obtained using procedures describedin 6.1 or 6.2 on a smooth board, top side down, to retain theshape of the original surface. Careless handli
25、ng may nullifyany test results obtained.NOTE 3When the weather is very hot, an ice chest or similar devicemay be considered for use while transporting the sample to the laboratory.6.4 When the only purpose of sampling is to measurepavement thickness, samples of smaller dimensions than pre-scribed in
26、 6.1 and 6.2 are not prohibited from being used.7. Separation of Pavement Courses7.1 Separation of two pavement courses may sometimes beachieved by striking a swift heavy blow on a chisel at the pointof bonding between the two courses. Separation by thisprocedure is more effectively achieved if the
27、sample is cooledbelow 0C (32F).7.2 As an alternative, the two pavement courses shall beseparated by freezing the sample and then cutting apart with asaw blade.As an alternative to freezing, spray cooling water onthe saw blade to minimize the generation of excessive heat.8. Report8.1 The test report(
28、s) shall include a statement as to themethod employed for removal of the sample from the com-pacted pavement.9. Keywords9.1 bituminous; compacted; coring bituminous pavement;equipment for sampling bituminous pavement; pavement sam-pling; sawing bituminous pavementFIG. 1 Core DebonderD5361062ASTM Int
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30、y 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 this standard or for additional standardsand sh
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32、andards, 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).D5361063
