ASTM C1385C1385M-10(2017) Standard Practice for Sampling Materials for Shotcrete.pdf

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1、Designation: C1385/C1385M 10 (Reapproved 2017)Standard Practice forSampling Materials for Shotcrete1This standard is issued under the fixed designation C1385/C1385M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of last

2、revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers procedures for obtaining represen-tative samples of materials to be shotcreted. The practicecovers sam

3、pling from stationary and truck mixers, volumetricand continuous mixing equipment, and bag and bulk delivery.1.2 The values stated in either inch-pound or SI units are tobe regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system are notex

4、act equivalents; therefore, each system shall be used inde-pendently of the other. Combining values from the two systemsmay result in nonconformance with this practice.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of

5、 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 establi

6、shed 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:2C125 Terminology Relating to Concrete and Concrete Ag-gregates3.

7、Terminology3.1 For definitions of terms used in this standard, refer toTerminology C125.4. Significance and Use4.1 This practice is used to obtain representative samples ofmaterials delivered to the shotcrete machine. These samplesare used to perform tests to determine compliance with thespecificati

8、ons under which the material is furnished.5. Procedure5.1 Composite samples are required by this practice, unlessspecifically made exempt by procedures governing the tests tobe performed, such as tests to determine uniformity of consis-tency and mixer efficiency. Procedures used to select thespecifi

9、c test batches are not described in this practice, but it isrecommended that random sampling be used to determineoverall specification compliance.5.2 The size of an individual sample shall be a minimum of12 kg 25 lb, the size of the composite sample shall be aminimum of 35 kg 75 lb. The composite sa

10、mple shall be largeenough to perform the required tests.5.3 Sampling shall be performed as the shotcrete material isdelivered to the shotcrete machine. The procedures used insampling shall include the use of every precaution that willassist in obtaining samples that are truly representative of thena

11、ture and condition of the material sampled as follows:5.3.1 Sampling Dry Process Shotcrete MaterialsSamplethe material by collecting two or more portions taken atregularly spaced intervals during discharge of the middle of thebatch or two or more random portions from the discharge ofcontinuous mixer

12、s. Combine the portions into one sample fortesting purposes. Do not obtain portions of the compositesample from the first 15 % or the last 15 % of the discharge.5.3.2 Sampling Wet Process Shotcrete MaterialSample asdescribed in 5.3.1 within the following limits.5.3.2.1 The elapsed time between obtai

13、ning the first and lastportions of the composite sample shall be as short as possiblebut in no instance shall exceed 15 min.5.3.2.2 Start test for slump or air content, or both, within 5min after obtaining last portion of the composite.5.3.3 Alternative Procedure for Truck and StationaryMixersThe mi

14、xer shall be stopped and material portionsremoved by any suitable means at approximately equal dis-tances from the front and back of the drum. Composite theportions into one sample for testing. Do not obtain portions1This practice is under the jurisdiction of ASTM Committee C09 on Concreteand Concre

15、te Aggregatesand is the direct responsibility of Subcommittee C09.46 onShotcrete.Current edition approved Dec. 1, 2017. Published January 2018. Originallyapproved in 1998. Last previous edition approved in 2010 as C1385/C1385M10.DOI: 10.1520/C1385_C1385M-10R17.2For referenced ASTM standards, visit t

16、he 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.

17、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 Barr

18、iers to Trade (TBT) Committee.1from the very front and back of the drum. Sample wet processshotcrete material within the time limits described in 5.3.2.1and 5.3.2.2.5.3.4 Sampling Bagged Prepackaged MaterialRandomlyselect a single package, or more if required to perform thespecified tests, from a lo

19、t. A lot is the quantity normally placedon a pallet. In general, this quantity will weigh from 2000 to4000 lbs 900 to 1300 kg.5.3.5 Sampling Bulk Prepackaged MaterialSample thematerial at the point of delivery to the shotcrete machine bycollecting three or more portions at regular intervals duringdi

20、scharge of the container or transportation unit. Obtain por-tions from the first, middle, and last third of the unit. Do notsample the first 15 % or last 15 % of the discharge. Combineportions for testing.6. Keywords6.1 dry process; sampling; shotcrete; wet processASTM International takes no positio

21、n 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 responsibility.

22、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 to ASTM I

23、nternational 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 address sho

24、wn 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 10 (2017)2