ASTM D1635/D1635M-19
(Test Method)Standard Test Method for Flexural Strength of Soil-Cement Using Simple Beam with Third-Point Loading
Standard Test Method for Flexural Strength of Soil-Cement Using Simple Beam with Third-Point Loading 
SIGNIFICANCE AND USE
5.1 This test method is used to determine the flexural strength of soil-cement. Flexural strength is significant in pavement design and can be used to determine the thickness of pavement layers.
Note 2: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.
SCOPE
1.1 This test method covers the determination of the flexural strength of soil-cement by the use of a simple beam with third-point loading.
Note 1: For methods of molding soil-cement specimens, see Practice D1632.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. The SI units are presented in brackets.
1.2.1 The gravitational system of inch-pound units is used when dealing with inchpound units. In this system, the pound (lbf) represents a unit of force (weight), while the unit for mass is 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 the guidelines for significant digits and rounding established in Practice D6026.
1.3.1 The procedures used to specify how data are collected/recorded or calculated in the standard are regarded as industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D1635/D1635M − 19
Standard Test Method for
Flexural Strength of Soil-Cement Using Simple Beam with
1
Third-Point Loading
This standard is issued under the fixed designation D1635/D1635M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 Thistestmethodcoversthedeterminationoftheflexural
1.5 This international standard was developed in accor-
strength of soil-cement by the use of a simple beam with
third-point loading. dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
NOTE 1—For methods of molding soil-cement specimens, see Practice
Development of International Standards, Guides and Recom-
D1632.
mendations issued by the World Trade Organization Technical
1.2 Units—The values stated in either SI units or inch-
Barriers to Trade (TBT) Committee.
pound units are to be regarded separately as standard. The
values stated in each system are not necessarily exact equiva-
2. Referenced Documents
lents; therefore, to ensure conformance with the standard, each
2
system shall be used independently of the other, and values
2.1 ASTM Standards:
from the two systems shall not be combined. The SI units are
D653 Terminology Relating to Soil, Rock, and Contained
presented in brackets.
Fluids
1.2.1 The gravitational system of inch-pound units is used
D1632 Practice for Making and Curing Soil-Cement Com-
when dealing with inchpound units. In this system, the pound
pression and Flexure Test Specimens in the Laboratory
(lbf) represents a unit of force (weight), while the unit for mass
D2216 Test Methods for Laboratory Determination of Water
is slugs.The rationalized slug unit is not given, unless dynamic
(Moisture) Content of Soil and Rock by Mass
(F = ma) calculations are involved.
D3740 Practice for Minimum Requirements for Agencies
1.3 All observed and calculated values shall conform to the
Engaged in Testing and/or Inspection of Soil and Rock as
guidelines for significant digits and rounding established in
Used in Engineering Design and Construction
Practice D6026.
D6026 Practice for Using Significant Digits in Geotechnical
1.3.1 Theproceduresusedtospecifyhowdataarecollected/
Data
recorded or calculated in the standard are regarded as industry
E4 Practices for Force Verification of Testing Machines
standard. In addition, they are representative of the significant
digits that generally should be retained. The procedures used
3. Terminology
do not consider material variation, purpose for obtaining the
3.1 For definitions of common technical terms used in this
data, special purpose studies, or any considerations for the
standard, refer to Terminology D653.
user’s objectives; and it is common practice to increase or
reduce significant digits of reported data to be commensurate
3.2 Definitions of Terms Specific to This Standard:
with these considerations. It is beyond the scope of this
3.2.1 flexural strength, n—maximum resistance of a speci-
standard to consider significant digits used in analysis methods
men subjected to bending.
for engineering design.
3.2.2 modulus of rupture, n—calculated stress, assuming
1.4 This standard does not purport to address all of the
linear-elastic behavior, in the tensile face of a beam specimen
safety concerns, if any, associated with its use. It is the
at the maximum bending moment during a standard test
responsibility of the user of this standard to establish appro-
method.
1
This test method is under the jurisdiction ofASTM Committee D18 on Soil and
Rock and is the direct responsibility of Subcommittee D18.15 on Stabilization With
2
Admixtures. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2019. Published December 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1959. Last previous edition approved in 2012 as D1635 – 12. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D1635_D1635M-19. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D1635/D1635M − 19
4. Summary of
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it 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 version
of the standard as published by ASTM is to be considered the official document.
Designation: D1635/D1635M − 12 D1635/D1635M − 19
Standard Test Method for
Flexural Strength of Soil-Cement Using Simple Beam with
1
Third-Point Loading
This standard is issued under the fixed designation D1635/D1635M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. 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 flexural strength of soil-cement by the use of a simple beam with third-point
loading.
NOTE 1—For methods of molding soil-cement specimens, see Practice D1632.
1.2 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D6026 unless superseded by this standard.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated
in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined. The SI units are presented in brackets.
1.2.1 The gravitational system of inch-pound units is used when dealing with inchpound units. In this system, the pound (lbf)
represents a unit of force (weight), while the unit for mass is 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 the guidelines for significant digits and rounding established in Practice
D6026.
1.3.1 The procedures used to specify how data are collected/recorded or calculated in the standard are regarded as industry
standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not
consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives;
and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations.
It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D1632 Practice for Making and Curing Soil-Cement Compression and Flexure Test Specimens in the Laboratory
D2216 Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in
Engineering Design and Construction
D6026 Practice for Using Significant Digits in Geotechnical Data
E4 Practices for Force Verification of Testing Machines
1
This test method is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.15 on Stabilization With
Admixtures.
Current edition approved May 1, 2012Nov. 1, 2019. Published June 2012December 2019. Originally approved in 1959. Last previous edition approved in 20002012 as
D1635 – 00D1635 – 12.(2006). DOI: 10.1520/D1635_D1635M-12.10.1520/D1635_D1635M-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D1635/D1635M − 19
3. Terminology
3.1 For common definitions of co
...
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