1、Designation: C 308 00 (Reapproved 2005)Standard Test Methods forWorking, Initial Setting, and Service Strength Setting Timesof Chemical-Resistant Resin Mortars1This standard is issued under the fixed designation C 308; the number immediately following the designation indicates the year oforiginal ad
2、option or, in the case of revision, 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.1. Scope1.1 These test methods cover the determination of theworking, initial set
3、ting, and service strength setting times ofchemical-resistant resin mortars.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 it
4、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 ASTM Standards:2C 279 Specification for Chemical-Resistant Masonry UnitsC 307 Test Meth
5、od for Tensile Strength of Chemical-Resistant Mortars, Grouts, and Monolithic SurfacingsC 904 Terminology Relating to Chemical-Resistant Non-metallic Materials3. Terminology3.1 DefinitionsFor definitions of terms used in these testmethods, see Terminology C 904.4. Significance and Use4.1 These test
6、methods offer a means of determining theworking time, initial setting time and service strength settingtime of chemical-resistant resin mortars. The results obtainedshould serve as a guide in, but not as the sole basis for,selection of a chemical-resistant mortar for a particular appli-cation.5. App
7、aratus5.1 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.)
8、 in length.5.3 BricksAs per Specification C 279, Type III.5.4 Vicat Apparatus The 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 aremovable
9、 steel needle, D, for initial setting time determina-tion, 1 mm in diameter and 50 mm in length. The rod, B, isreversible, 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. Inaddi
10、tion 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 Scale The graduated scale, when com-pared with a standard scale accurate to wit
11、hin 0.1 mm at allpoints, shall not show a deviation at any point greater than 0.25mm.6. Temperature6.1 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 andinitial setting tim
12、e tests shall be 23 6 2C (73 6 4F). Other1These test methods are under the jurisdiction of Committee C03 on Chemical-Resistant Nonmetallic Materials and are the direct responsibility of SubcommitteeC03.01on Mortars and Carbon Brick.Current edition approved Oct. 1, 2005. Published October 2005. Origi
13、nallyapproved in 1953. Last previous edition approved in 2000 as C 30800.2For 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 A
14、STM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.test temperatures are acceptable upon agreement between themanufacturer and user provided that they are reported with thetest data.7. Preparation of Mortar7.1 Prepare a 1000
15、-g sample of mortar, using proportionateamounts of filler and liquid as recommended by the manufac-turer. If the proportions specified are by volume, weigh thematerials and report the corresponding proportions by weight.Pour an appropriate amount of liquid into the pan, graduallyadd the powder to th
16、e liquid resin, and mix thoroughly with thetrowel until a uniform mixture is obtained (this shall becomplete within 3 min). Continue the mixing operation for 1min after an apparently uniform mixture is obtained. Spreadout the mortar in a layer of uniform thickness covering theentire surface of the m
17、ixing pan.7.2 For a multicomponent resin mortar, the procedure de-scribed in 7.1 may be modified slightly to permit the additionof the catalyst to the mortar within the specified time limit.8. Working Time8.1 Remove approximately 25-g portions of the resin mortarat specific intervals and trowel on t
18、he horizontal surface ofclean, dry freezer paper. In order that sufficient data will beobtained with the minimum quantity of material, it is recom-mended that the testing be done every 5 min until the materialbegins to curl behind the trowel. The sample shall be removedfrom a portion of the mortar l
19、ocated at least 50 mm (2 in.) fromthe side of the pan. The material used for tests shall not bereturned to the mixing pan. The working time shall be recordedas the longest time (in minutes) at which the mortar does notcurl behind the trowel.9. Initial Setting Time9.1 Immediately after mixing is comp
20、lete, remove andbutter a sufficient amount of the mortar on the sides of twoclean, dry bricks to providea6mm(14 in.) joint. The bricksshould be laid on freezer paper and the buttered sides pushedtogether to form a joint approximately 6 mm (14 in.) wide. Careshould be taken to eliminate voids when pu
21、shing the brickstogether. It is advantageous to establish the joint thickness byinserting a dowel rod near each end of the joint. Strike off anyexcess material above the joint by use of the trowel.9.2 Examine the joint qualitatively, at 1-h intervals, with thepoint of the trowel until indentation be
22、comes difficult. Con-tinue the test with the Vicat needle (at 20 to 30-min intervals)until the indentation of the needle during a 10-min period isless than 1 mm. Record the initial setting time as the timeinterval in hours at which the indentation of the Vicat needle isless than 1 mm.10. Service Str
23、ength Setting Time10.1 Make a minimum of three tension test specimens fortesting at each time interval. This normally requires 12 or morespecimens. Prepare tension specimens in accordance with TestMethod C 307. Make the first test 24 h after the initial mixingtime and continue every 48 h until 90 %
24、of the manufacturerspublished value for tensile strength is reached.NOTE 1Ring, G, and plate, H, are not required for this test.FIG. 1 Vicat ApparatusC 308 00 (2005)210.2 Record the service strength setting time as the time indays between initial mixing of the component parts at aspecified temperatu
25、re and the time at which the mortar hasacquired at least 90 % of the manufacturers published valuefor tensile strength.11. Report11.1 The report shall include the following:11.1.1 Identification of mortar tested,11.1.2 Working time,11.1.3 Initial setting time,11.1.4 Service strength setting time,11.
26、1.5 Number of specimens tested, and11.1.6 Any variation from the standard procedure.12. Precision and Bias12.1 A statement of precision and bias will be added at alater date.13. Keywords13.1 chemical-resistant mortars; service strength settingtime; initial setting time; working timeASTM Internationa
27、l takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this 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 o
28、wn 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 should be a
29、ddressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible 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,
30、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).C 308 00 (2005)3
