ASTM_C_308_-_18.pdf

Designation:C30818Standard Practice forWorking,Initial Setting,and Service Strength Setting Timesof Chemical-Resistant Resin Mortars1This standard is issued under the fixed designation C308;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.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 These methods are used to estimate the working,initialsetting,and service strength setting times of chemical-resistantresin mortars.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.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 establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C279 Specification for Chemical-Resistant Masonry UnitsC307 Test Method for Tensile Strength of Chemical-Resistant Mortar,Grouts,and Monolithic SurfacingsC904 Terminology Relating to Chemical-Resistant Nonme-tallic Materials3.Terminology3.1 DefinitionsFor definitions of terms used in these testmethods,see Terminology C904.4.Significance and Use4.1 These methods offer a means of estimating the workingtime,initial setting time and service strength setting time ofchemical-resistant resin mortars.The results obtained shouldserve as a guide in,but not as the sole basis for,selection of achemical-resistant mortar for a particular application.5.Apparatus5.1 Weighing EquipmentShall be capable of weighingmaterials or specimens to 60.3%accuracy.5.2 Mixing Equipment:5.2.1 Porcelain Enameled PanMeasuring approximately250 mm long by 400 mm wide by 50 mm deep(10 in.by 16in.by 2 in.).5.2.2 Bricklayers Triangular TrowelApproximately 100mm(4 in.)in length.5.3 BricksAs per Specification C279,Type III.5.4 Vicat ApparatusThe Vicat apparatus shall consist of aframe,A(see Fig.1),bearing a movable rod,B,weighing 300g,one end,C,the plunger end,being 10 mm in diameter for adistance of at least 50 mm and the other end having aremovablesteelneedle,D,forinitialsettingtimedetermination,1 mm in diameter and 50 mm in length.The rod,B,is reversible,and can be held in any desired position by a setscrew,E,and has an adjustable indicator,F,which moves overa scale(graduated in millimetres)attached to the frame,A.Inaddition to the above,the Vicat apparatus shall conform to thefollowing requirements:5.4.1 Weight of Plunger300 6 0.5 g.5.4.2 Diameter of Larger End of Plunger10 6 0.05 mm.5.4.3 Diameter of Needle1 6 0.05 mm.5.4.4 Graduated ScaleThe graduated scale,when com-pared with a standard scale accurate to within 0.1 mm at allpoints,shall not show a deviation at any point greater than 0.25mm.6.Procedure6.1 Temperature:6.1.1 All materials used in this method shall be stored for atleast 16 h prior to use at the standard test temperature of 23 62C(73 6 4F).The standard temperature for the working and1This practice is under the jurisdiction of Committee D01 on Paint and RelatedCoatings,Materials,and Applications and is the direct responsibility of D01.46 onIndustrial Protective Coatings.Current edition approved Sept.1,2018.Published September 2018.Originallyapproved in 1953.Last previous edition approved in 2012 as C308 00(2012)1.DOI:10.1520/C0308-18.2For referenced ASTM 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 initial setting time tests shall be 23 6 2C(73 6 4F).Othertest temperatures are acceptable upon agreement between themanufacturer and user provided that they are reported with thetest data.6.2 Preparation of Mortar:6.2.1 Prepare a 1000-g sample of mortar,using proportion-ate amounts of filler and liquid as recommended by themanufacturer.If the proportions specified are by volume,weigh