1、Designation: C1073 12C1073 18Standard Test Method forHydraulic Activity of Slag Cement by Reaction with Alkali1This standard is issued under the fixed designation C1073; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This test method covers the rapid determination of hydraulic activity of slag cement. This test method measures
3、theaccelerated strength development of the slag cement by using sodium hydroxide solution as mixing water and curing at elevatedtemperature.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.3 This standard does not purport
4、 to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use. A specific warning st
5、atement is given in Section 6.1.4 The text of this standard references notes and footnotes which provide explanatory information. These notes and footnotes(excluding those in tables) shall not be considered as requirements of this standard.1.5 This international standard was developed in accordance
6、with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standard
7、s:2C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube Specimens)C125 Terminology Relating to Concrete and Concrete AggregatesC219 Terminology Relating to Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of
8、Plastic ConsistencyC670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction MaterialsC778 Specification for Standard SandC989 Specification for Slag Cement for Use in Concrete and Mortars3. Terminology3.1 Definitions:3.1.1 Definitions are given in Terminology C125
9、and C219.3.2 Definitions of Terms Specific to This Standard:3.2.1 slag, ngranulated blast-furnace slag as defined in Terminology C125 and ground to cement fineness.4. Significance and Use4.1 This test method can be used as a quality-control test for slag production from a single source after adequat
10、e correlation withtests stipulated in Specification C989.4.2 This test method may be used as an evaluation technique for slag cement, when an appropriate correlation with variousfinenesses of slag cements from a specific source ground in a specific laboratory mill has been previously developed.4.3 T
11、he hydraulic activity as measured by this test method on slag cement samples can provide guidance to a manufacturer asto fineness level required to maintain a certain level of hydraulic activity.1 This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates an
12、d is the direct responsibility of Subcommittee C09.27 onGround Slag.Current edition approved July 15, 2012March 15, 2018. Published October 2012April 2018. Originally approved in 1985. Last previous edition approved in 20112012as C1073 97a (2011).C1073 12. DOI: 10.1520/C1073-12.10.1520/C1073-18.2 Fo
13、r referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to pro
14、vide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the
15、 standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.4 While this test method is intended primarily
16、 as a quality control test, some studies have shown that the test method is capableof evaluating the hydraulic activity of slag cements from different sources.5. Apparatus5.1 Three-Gang Molds for 2-in. or 50-mm Cubes and Compression Test Machine, as specified in Test Method C109/C109M(Note 1).NOTE 1
17、Silicone grease is recommended for protection of mold surfaces from the caustic solution in this test.5.2 Mixer, as specified in Method C305.5.3 Curing Chamber, capable of maintaining a temperature of air or water bath of 55 6 2C.5.4 Containers, capable of holding one three-cube mold in an essential
18、ly vapor-tight condition. If polyethylene or other plasticbags are used, they shall have a closure of the zip type. If rigid containers are used, they shall have tight sealing covers (Note 2).The acceptability of containers shall be determined by measuring the water loss after curing in air or the g
19、ain after curing in waterbath. Water loss shall be less than 15 mL in air curing or gain less than 5 mL in water-bath curing.NOTE 2Plastic boxes designed for household storage of celery with a bottom grid have given good service.6. Materials6.1 Graded Standard SandThe sand used for making test speci
20、mens shall be natural silica sand conforming to therequirements for graded standard sand in Specification C778.6.2 Reagent Sodium Hydroxide Solution (20 %):6.2.1 Prepare fresh daily using boiled distilled water and reagent grade sodium hydroxide (NaOH).6.2.2 Dissolve 200 g of sodium hydroxide in 1 L
21、 of distilled water and cool to room temperature. Warning All work withthis highly caustic solution should be completed with the use of gloves, apron, and face mask.NOTE 3One litre will provide enough solution for eight three-cube batches. More or less solution in these proportions should be made de
22、pendingon the number of batches to be mixed during the day.7. Procedure7.1 BatchThe quantities of materials to be mixed at one time in the batch of mortar for making three or six specimens shallbe as follows:Number of Specimens3 6Slag Cement, g 250 500Sand, g 687.5 1375NaOH solution, mL 112.5 2257.2
23、 Preparation of SpecimensPrepare specimens in accordance with Test Method C109/C109M, except that the mixing watershall be replaced by the volume of NaOH solution equal to the volume of water which would give a water/slag cement ratio of0.45 by mass.7.3 CuringImmediately upon completion of molding p
24、lace each three-cube mold in a container. Add approximately 50 mLof water into the container at the mold base in order to assure 100 % relative humidity during the curing cycle. In the case whereplastic bags are employed, special care should be exercised to avoid tearing the plastic during handling.
25、 Place the container andmolds in the curing chamber maintained at 55 6 2C. If water curing is used, rigid containers shall be required and the watertemperature shall be controlled to the prescribed temperature and a minimum 5 mL of water shall cover the containers. At the endof 23 6 14 h remove the
26、molds from the curing chamber and examine each container for leaks. If more than 15 mL of water hasescaped or more than 5 mL of water has entered, discard the specimens and retest. Remove the specimens from the mold and storein room air until tested.7.4 Determination of Compressive StrengthTest the
27、specimens for compressive strength at 24 6 12 h in accordance with TestMethod C109/C109M.8. Calculation8.1 Calculate the compressive strength of the specimens in accordance with Test Method C109/C109M.9. Faulty Specimens and Retests9.1 Faulty specimens and the need for retest shall be determined in
28、accordance with Test Method C109/C109M.10. Report10.1 The average strength in MPa rounded to the nearest 0.1 MPa at 24 h shall be reported as the hydraulic activity of thesample. For example, Hydraulic Activity with NaOH: 7.3 MPa.C1073 182NOTE 4For example, hydraulic activity with NaOH: 7.3 MPa.11.
29、Precision and Bias11.1 PrecisionThe following precision statements were developed using data generated from an interlaboratory test program.Nine laboratories participated in the program and tested three slags with varied hydraulic activity. Duplicate tests were performedon different days. Revisions
30、to the precision statements shall be made as more comprehensive data become available.11.1.1 The precision statements are applicable when a test result is the average of compressive strengths of three cubes moldedfrom a single batch of mortar and tested at the same age.11.1.2 The multilaboratory coe
31、fficient of variation has been found to be 8.1 % (Note 45). Therefore, results of properlyconducted tests of single batches by two different laboratories should not differ by more than 22.9 % of their average (Note 45).11.1.3 The single-laboratory coefficient of variation has been found to be 4.6 %
32、(Note 45). Therefore, results of two properlyconducted tests of single batches of mortar made with the same materials either on the same day or within the same week shouldnot differ from each other by more than 13.0 % of their average (Note 45).NOTE 5These numbers represent respectively the (Is) and
33、 (d2s) limits as described in Practice C670.11.2 BiasThe procedure in this test method has no bias since the hydraulic activity is defined only in terms of the test method.12. Keywords12.1 ground slag; hydraulic activity; slag cementSUMMARY OF CHANGESCommittee C09 has identified the location of sele
34、cted changes to this test method since the last issue(C107312) that may impact the use of this test method. (Approved March 15, 2018.)(1) Revised 10.1 to move non-mandatory language to Note 4.ASTM International takes no position respecting the validity of any patent rights asserted in connection wit
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37、n 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 address shown below.This standard is copyrighted by ASTM International, 100 Barr Harb
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