1、Designation:D1635/D1635M19Standard Test Method forFlexural Strength of Soil-Cement Using Simple Beam withThird-Point Loading1This standard is issued under the fixed designation D1635/D1635M;the number immediately following the designation indicates theyear of original adoption or,in the case of revi
2、sion,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of the flexuralstrength of soil-cement by the use of a simple b
3、eam withthird-point loading.NOTE1For methods of molding soil-cement specimens,see PracticeD1632.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system are not necessarily exact equiva-lents;therefore,to ensure confo
4、rmance with the standard,eachsystem shall be used independently of the other,and valuesfrom the two systems shall not be combined.The SI units arepresented in brackets.1.2.1 The gravitational system of inch-pound units is usedwhen dealing with inchpound units.In this system,the pound(lbf)represents
5、a unit of force(weight),while the unit for massis slugs.The rationalized slug unit is not given,unless dynamic(F=ma)calculations are involved.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.3.1 The procedures us
6、ed to specify how data are collected/recorded or calculated in the standard are regarded as industrystandard.In addition,they are representative of the significantdigits that generally should be retained.The procedures useddo not consider material variation,purpose for obtaining thedata,special purp
7、ose studies,or any considerations for theusers objectives;and it is common practice to increase orreduce significant digits of reported data to be commensuratewith these considerations.It is beyond the scope of thisstandard to consider significant digits used in analysis methodsfor engineering desig
8、n.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of 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.
9、5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Tr
10、ade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD1632 Practice for Making and Curing Soil-Cement Com-pression and Flexure Test Specimens in the LaboratoryD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of
11、 Soil and Rock by MassD3740 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 GeotechnicalDataE4 Practices for Force Verification of Testing Machines3.Termino
12、logy3.1 For definitions of common technical terms used in thisstandard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 flexural strength,nmaximum resistance of a speci-men subjected to bending.3.2.2 modulus of rupture,ncalculated stress,assuminglinear-elastic behav
13、ior,in the tensile face of a beam specimenat the maximum bending moment during a standard testmethod.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.15 on Stabilization WithAdmixtures.Current edition approved Nov.1
14、,2019.Published December 2019.Originallyapproved in 1959.Last previous edition approved in 2012 as D1635 12.DOI:10.1520/D1635_D1635M-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume inform
15、ation,refer to the standards Document Summary page onthe ASTM website.*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 StatesThis international standard was developed in accordance w
16、ith 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 Barriers to Trade(TBT)Committee.1 4.Summary of Test Method4.1 A beam,typically 3 by 3 by 1114in.76 by 76 by 290mm,is placed in a third-point loading apparatus and loadeduntil failure.4.2 The maximum applied load,specimen dimensions,andspan length are used to calculate the mo
