1、Designation: D 4263 83 (Reapproved 2005)Standard Test Method forIndicating Moisture in Concrete by the Plastic SheetMethod1This standard is issued under the fixed designation D 4263; 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method is used
3、 to indicate the presence ofcapillary moisture in concrete.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It
4、 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. For specific cautionstatements, see Section 4.2. Significance and Use2.1 Capillary moisture in the concrete may be detrime
5、ntal tothe performance of certain coating systems that cannot toleratemoisture on or within the surface boundary.2.2 This test method is used prior to the application ofcoatings on concrete.3. Materials3.1 Transparent Polyethylene Sheet, commercially avail-able, approximately 4 mils (0.1 mm) thick.3
6、.2 Adhesive Tape that will adhere to the substrate. (Ducttape 2 in. (50 mm) wide is suggested.)4. Cautions4.1 This test method shall be conducted when the surfacetemperature and ambient conditions are within the establishedparameters for application of the coating system.4.2 Avoid direct sunlight, d
7、irect heat, or damage to theplastic sheet, as such treatment affects the reliability of theresults.5. Procedure5.1 Tape a segment of plastic sheet, approximately 18 by 18in. (457 by 457 mm), tightly to the concrete surface makingsure that all edges are sealed.5.2 Allow the plastic sheet to remain in
8、 place a minimum of16 h.5.3 After the allowed time has elapsed, remove the plasticsheet and visually inspect the underside of the sheet and theconcrete surface of the patch for the presence of moisture.5.4 Sampling:5.4.1 FloorsOne test area per 500 ft2(46 m2) or portionthereof, of surface areas unle
9、ss otherwise specified.5.4.2 Walls and CeilingsOne test area per 500 ft2(46 m2)or portion thereof, of surface area unless otherwise specified.5.4.3 The recommended practice is a minimum of one testfor each 10 ft (3 m) of vertical rise in all elevation startingwithin 12 in. (300 mm) of the floor.6. R
10、eport6.1 Report the presence or absence of moisture.7. Precision and Bias7.1 This test method indicates the presence of capillarymoisture. This method is purely qualitative. No precision orbias has been established for this test method.8. Keywords8.1 concrete; moisture1This test method is under the
11、jurisdiction of ASTM Committee D33 onProtective Coating and Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.05 on Application and Surface Preparation.Current edition approved Sept. 1, 2005. Published September 2005. Originallyapproved in 1983. Last pre
12、vious edition approved in 1999 as D 4263 83 (1999).1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin thi
13、s standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be
14、 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 should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresp
15、onsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, We
16、st 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).D 4263 83 (2005)2
