1、Designation:D570395(Reapproved 2013)Standard Practice forPreparatory Surface Cleaning for Clay Brick Masonry1This standard is issued under the fixed designation D5703;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last r
2、evision.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 non-abrasive surface cleaning ofclay brick masonry to remove surface contaminants such asdirt,grease,loose m
3、aterial,soot,fly ash,hydrocarbon residues,algae,etc.in preparation for the application of water repellentcoatings without damaging or altering the surface appearanceof the clay brick masonry.1.2 Procedures included in this practice are water cleaning,detergent water cleaning,pressurized water cleani
4、ng,steamcleaning,and acid cleaning.It is not intended for the cleaningof newly constructed brick masonry.Use of procedures de-scribed in this practice may not be appropriate where thesurface is of a historical nature.1.3 The values stated in inch-pound units are to be regardedas the standard.The val
5、ues given in parentheses are forinformation only.1.4 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 regul
6、atory limitations prior to use.For specific hazardinformation see Section 5 and Note 2 and Note 3.2.Referenced Documents2.1 ASTM Standards:2C43 Terminology of Structural Clay Products(Withdrawn2009)33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 slurry,na coating of finely gro
7、und clay,coloringagents,and water applied to the surface of clay brick during themanufacturing process prior to firing of the unit.3.1.1.1 DiscussionSand may also be added to the slurry.3.2 For definitions of other terms found in this practice,refer to Terminology C43.4.Significance and Use4.1 Surfa
8、ce cleaning is necessary to prepare clay brickmasonry surfaces for application of coatings intended for waterrepellent protection.Surface cleaning helps to ensure properadhesion or even penetration of the coating and to preventunintended sealing-in of stains.4.2 This practice addresses surface clean
9、ing only.Otherpreparation or remedial repairs,such as repointing the masonryor replacing of units,may be necessary and must be completedprior to application of the water repellent treatment.5.Hazards5.1 Localized stains(for example efflorescence and metallicstains)and previously applied coatings not
10、 compatible with thewater repellent treatment may require removal by other surfacecleaning methods.Failure to remove localized stains prior toapplication of the treatment may prevent later removal of thestain.NOTE1Methods for removing localized stains,including use ofnon-proprietary chemical compoun
11、ds,can be found in several references,some of which are listed in Appendix X1.5.2 Do not perform water cleaning,detergent watercleaning,pressurized water cleaning,and acid cleaning attemperatures below 40F.5.3 Handle proprietary chemical cleaning products accord-ing to manufacturers recommendations.
12、Conform to estab-lished federal,state,local and project requirements for use anddisposal of materials.Provisions for collecting and removingcleaning effluent may be necessary.5.4 Use the minimum effective pressure if pressure washingequipment is employed for water cleaning or for flushing thesurface
13、 for detergent water cleaning or chemical cleaning.Avoid excessive pressure that could damage the masonrysurface.1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.47 on Concrete,S
14、tone and Masonry Treatments.Current edition approved June 1,2013.Published June 2013.Originallyapproved in 1995.Last previous edition approved in 2007 as D5703 95(2007).DOI:10.1520/D5703-95R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servi
15、ceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428
16、-2959.United States1 6.Procedure6.1 Water,detergent water,pressurized water,or scrubbingare acceptable cleaning methods.Acid cleaning agents may beused to remove surface deposits such as soot,fly ash,andhydrocarbon residues not removed by any of the abovemethods.Precede and follow chemical and detergent cleaningwith a thorough fresh(potable)water rinse.Make provisionsfor the removal of cleaning effluent generated.6.2 If necessary,test cleaned surfaces for moisture contentprior to applying water
