1、Designation:C22198(Reapproved 2014)Standard Specification forCorrugated Asbestos-Cement Sheets1This standard is issued under the fixed designation C221;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numbe
2、r in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers corrugated asbestos-cementsheet products and lists accessories used in conjunction withapplication.Corrugated asbestos
3、-cement sheets are designedfor the following purposes:1.1.1 To provide weather-resistant surfaces of roofs,walls,and other elements of buildings and structures,and1.1.2 For decorative as well as functional uses in any areawhere a corrugated sheet may be advantageous.1.2 The values stated in SI units
4、 are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 WarningBreathing of asbestos dust is hazardous.Asbestos and asbestos products present demonstrated healthrisks for users and for those with whom they come into contact.In addition to other precautions,when
5、 working with asbestos-cement products,minimize the dust that results.For informa-tion on the safe use of chrysotile asbestos,refer to“Safe Use ofChrysotile:A Manual on Preventive and Control Measures.”21.4 This standard does not purport to address all of thesafety concerns,if any,associated with it
6、s 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.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material procurement form a part
7、 of this specification to theextent referenced herein:2.2 ASTM Standards:3C150 Specification for Portland CementC595 Specification for Blended Hydraulic CementsD2946 Terminology for Asbestos and AsbestosCementProducts2.3 Federal Standard:4Fed.Std.No.123 Marking for Domestic Shipment(CivilianAgencies
8、)2.4 Military Standard:4MIL-STD-129 Marking for Shipment and Storage3.Terminology3.1 Definitions:3.1.1 densitymass per unit volume,expressed in g/cm3(orlb/ft3).3.1.2 flexural strengththe average breaking load in new-tons per metre of width(or lbf/ft of width)of dried specimensloaded as simple beams
9、on a 762 mm(30 in.)span with theload applied equally and simultaneously at both one-thirdpoints of the span.3.1.2.1 DiscussionThe flexural performance is defined asthe moment capacity in N.m/m(or ft.lbf/ft)of width obtainedfrom the product of flexural strength and span divided by 6.3.1.3 pitchthe di
10、stance from center point to center point ofadjacent crests of an asbestos-cement product of corrugated orgrooved cross-section.3.1.4 For additional definitions refer to Terminology D2946.3.2 Definitions of Terms Specific to This Standard:3.2.1 waterabsorptionforthepurposeofthisspecification,the incr
11、ease in mass of the test specimen isexpressed as a percentage of its dry mass after immersion inwater for 24 h.4.Classification4.1 The asbestos-cement corrugated sheets furnished underthis specification shall be manufactured to meet a minimumbending moment determined by loading equally and simulta-n
12、eously at both one-third points of the test span.The types ofasbestos-cement corrugated sheets manufactured are given inTable 1.1This specification is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of SubcommitteeC17.03 on Asbestos-Ce
13、ment Sheet Products and Accessories.Current edition approved Dec.1,2014.Published December 2014.Originallyapproved in 1949.Last previous edition approved in 2008 as C221 98(2008).DOI:10.1520/C0221-98R14.2Available from The Asbestos Institute,http:/ referenced ASTM standards,visit the ASTM website,ww
14、w.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.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:
15、/dodssp.daps.dla.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Materials and Manufacture5.1 Corrugated asbestos-cement sheets,and accessoryshapes except for filler strips,shall be composed of a mixtureof asbestos fiber and hydraul
16、ic cement,as specified in Speci-fications C150 and C595,with not more than 1 weight%oforganic fiber.The product may contain inert mineral pigments,mineral fillers,curing agents,and coatings,and shall be formedunder pressure and cured.6.Physical Requirements6.1 All measurements and tests necessary for determiningthe conformity of the asbestos-cement sheets with this speci-fication shall be made in accordance with the test methodscovered in Sections 10 to 14.6.2 Flexural StrengthFlexural strength