ASTM_D_7949_-_14.pdf

Designation:D794914Standard Test Methods forThermal Integrity Profiling of Concrete Deep Foundations1This standard is issued under the fixed designation D7949;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 test methods provide procedures for measuringthe temperature profile within a deep foundation elementconstructed using cast-in-place concrete,such as bored piles,drilled shafts,augered piles,diaphragm walls,barrettes,anddams,and alike.The thermal profile induced by the curingconcrete can be used to evaluate the homogeneity and integrityof the concrete mass within the deep foundation element.1.2 Two alternative procedures are provided:1.2.1 Method A uses a thermal probe lowered into accessducts installed in the deep foundation element during construc-tion.1.2.2 Method B uses multiple embedded thermal sensorsattached to the reinforcing cage installed in the deep foundationelement during construction.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.3.1 The procedures used to specify how data are collected/recorded and calculated in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that should generally be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of reported data to com-mensurate with these considerations.It is beyond the scope ofthis standard to consider significant digits used in analysismethods for engineering design.1.4 This standard provides minimum requirements for ther-mal profiling of concrete deep foundation elements.Plans,specifications,and/or provisions prepared by a qualifiedengineer,and approved by the agency requiring the test,mayprovide additional requirements and procedures as needed tosatisfy the objectives of a particular test program.1.5 The text of this standard references notes and footnotes,which provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.6 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.NOTE1ASTM International takes no position respecting the validityof any patent rights asserted in connection with any item mentioned in thisstandard.Users of this standard are expressly advised that determinationof the validity of any such patent rights,and the risk of infringement ofsuch rights,are entirely their own responsibility.1.7 LimitationsProper installation of the access ducts orthermal sensors is advised for effective testing and interpreta-tion.If a flaw is detected,then the method does not give theexacttypeofflaw(forexample,inclusion,bulge,honeycombing,lack of cement particles,and alike.)but ratheronly that a flaw exists.The method is limited primarily totesting the concrete during the early curing process.1.8 This standard may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms used in thisstandard,refer to Terminology D653.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.11 on Deep Foundations.Current edition approved Nov.1,2014.Published November 2014.DOI:10.1520/D794914.2For 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 States1 3.2 Definitions of Terms Specific to This Standard:3.2.1 access ducts,npreformed steel pipes or plastic pipes(for example,PVC or equivalent)placed in the concrete toallow thermal probe entry to measure temperature in theconcrete.3.2.2 acce