1、Designation: C 414 03 (Reapproved 2008)Standard Test Method forWorking, Setting, and Service Strength Setting Times ofChemically Setting Chemical-Resistant Silicate and SilicaMortars1This standard is issued under the fixed designation C 414; the number immediately following the designation indicates
2、 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.This standard has been approved for use by agencies of the
3、Department of Defense.1. Scope1.1 This test method offers a means of determining theworking time, setting time, and service strength setting time ofchemically setting, chemical-resistant silicate and silica mor-tars.NOTE 1For chemical-resistant resin mortars refer to Test MethodsC 308.1.2 The values
4、 stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with it
5、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 308 Test Methods for Working, Initial Setting, and Ser-vice Strength
6、Setting Times of Chemical-Resistant ResinMortarsC 579 Test Methods for Compressive Strength of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, andPolymer ConcretesC 904 Terminology Relating to Chemical-Resistant Non-metallic Materials3. Terminology3.1 DefinitionsFor definitions of terms u
7、sed in these testmethods, see Terminology C 904.4. Significance and Use4.1 This test method offers a means of determining theworking time, initial setting time and service strength settingtime of chemically setting chemical-resistant silicate and silicamortars.5. Apparatus5.1 Equipment, capable of w
8、eighing materials or specimensto 60.3 % accuracy.5.2 Mixing PanA metal or porcelain enameled pan mea-suring approximately 8 by 8 by 2 in. (200 by 200 by 50 mm)deep.5.3 TrowelA bricklayers triangular trowel approximately4 in. (100 mm) in length.5.4 Aluminum Foil DishA flat-bottomed container 214 in.(
9、60 mm) in diameter by58 in. (16 mm) high. An aluminum foildish for milk analysis is suitable.5.5 Gillmore NeedleThe Gillmore needle shall conform tothe following requirements:Initial NeedleWeight 113.4 6 0.5 gDiameter 0.083 6 0.002 in.Final NeedleWeight 453.6 6 0.5 gDiameter 0.042 6 0.002 in.1This t
10、est method is under the jurisdiction of ASTM Committee C03 onChemical-Resistant Nonmetallic Materials and are the direct responsibility ofSubcommittee C03.01 on Mortars and Carbon Brick.Current edition approved June 1, 2008. Published July 2008. Originally approvedin 1958. Last previous edition appr
11、oved in 2003 as C 414 03.2For 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.1Copyright ASTM International, 100 B
12、arr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.5.1 The needle tips shall be cylindrical for a distance ofabout316 in. (4.8 mm). The needle ends shall be plane and atright angles to the axis of the rod and shall be maintained in aclean condition. The Gillmore needles
13、 should preferably bemounted as shown in Fig. 1.6. Temperature Conditions6.1 All material used in this test method shall be stored forat least 16 h prior to use at the standard test temperature of 736 4F (23 6 2C). The standard temperature for the working,initial setting, and service strength settin
14、g times shall be 73 64F.6.2 The relative humidity of the surrounding air shall bekept below 80 % during mixing of the mortar and conditioningof the specimens.6.3 Other test temperatures are acceptable upon agreementbetween the manufacturer and user, provided that they arereported with the test data.
15、7. Preparation of Mortar7.1 Prepare a 4.4 lb (2000 g) sample of mortar using theproportionate amounts of powder filler and liquid recom-mended by the manufacturer. If the proportions are specified byvolumes, weigh the volumes and report the correspondingweights. Pour the liquid into the mixing pan a
16、nd gradually addthe powder filler to the liquid while mixing with the trowel.Note and record the time mixing begins. Thoroughly mix themass until a uniform mixture is secured. The total mixing timeshall be in accordance with the manufacturers recommenda-tion.7.2 Fill an aluminum dish and strike off
17、the surface evenlywith a straight-edge spatula. Spread out the remainder of themortar in the mixing pan to a uniform thickness.7.3 Prepare test specimens in accordance with C 579 ifservice strength setting time is to be determined.8. Procedure8.1 Working TimeRemove approximately 0.5 oz (15 g)portion
18、s of the silicate or silica mortar at 5-min (maximum)intervals and trowel onto a smooth, clean and dry horizontalsurface. Before taking the 0.5 oz portions, work the trowelthrough the mix to work in any skin that may have formed onthe surface. Consider the mortar workable if it stays in theapplied p
19、osition without following the trowel or withoutcurling behind the trowel while spreading. Record the workingtime as the time in minutes from the start of mixing the fillerand binder until the mortar ceases to be workable and fails tostay in the applied position while spreading. Do not return themate
20、rial used for tests to the mixing pan.8.2 Initial Setting TimeTest the specimen in the aluminumdish (see 7.2) for penetration by the Gillmore needle. Recordthe initial setting time as the time in hours from the start ofmixing the filler and binder until the 1 lb (454 g) GillmoreNeedle, having a tip
21、diameter of124 in. (1.06 mm) penetratesthe sample316 in. (5 mm), the length of the needle tip, in 1 min.NOTE 2In order that sufficient data will be obtained with the sample,it is suggested that tests be made at maximum time intervals of 30 minuntil the needle takes 15 to 30 s for penetration; then t
22、he tests can berepeated at more frequent intervals, as the time for penetration nears 60 s.8.3 Service Strength Setting Time, CompressiveIn accor-dance with Test Method C 579, make a minimum of three testspecimens for testing at each time interval; this normallyrequires a minimum of twelve specimens
23、. Test three specimenson the seventh day after preparation in accordance with TestMethod C 579 and continue testing every 48 h until the averagecompressive strength of the three test specimens at the respec-tive time interval reaches 90 % of manufacturers publishedcompressive strengths when tested a
24、t 73 6 4F. Other testtemperatures are acceptable as agreed upon by the user andmanufacturer. They shall agree on an acceptable time, tempera-ture, and compressive strength percentage criterion for servicestrength setting time as applies to their specific application.9. Report9.1 Report the following
25、 information:9.1.1 Manufacturers name of mortar and generic type,9.1.2 Mixing ratio and component weights,9.1.3 Test conditions (temperature and humidity),9.1.4 Working time (minutes),9.1.5 Initial setting time (hours),9.1.6 Manufacturers published compressive strength,9.1.7 Service compressive stre
26、ngth setting time (days).9.1.8 Report the compressive strengths determined at therespective time intervals.9.2 If test temperatures or other test criteria are differentthan so stated by the test method, then same shall be reported.10. Precision and Bias10.1 Precision and bias for this test method ha
27、ve not beenestablished.FIG. 1 Gilmore ApparatusC 414 03 (2008)210.2 To obtain sufficient results to make a statement ofprecision and bias, repeat Sections 6, 7, and 8 at least threemore times.10.3 Test results that are manifestly faulty or that givevalues differing by more than 15 % from the average
28、 value ofall respective results obtained when using the same mortarcomponents and tested at the same temperatures shall not beconsidered in determining the average working time, initialsetting time, or the service compressive strength setting time.If, after discarding values, there are less than thr
29、ee remainingfor determination of the working time, initial setting time, andthe service compressive strength time, a retest shall be made.11. Keywords11.1 chemical-resistant; mortars; service strength settingtime; setting time; silica mortars; silicate mortars; workingtimeASTM International takes no
30、 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 own respons
31、ibility.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 addressed t
32、o 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, at the add
33、ress 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 414 03 (2008)3
