ASTM C1506-16b
(Test Method)Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters
Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters
SIGNIFICANCE AND USE
4.1 This test method provides a means for determining the ability of mortars and plasters to retain water under suction. Test results may be used to determine compliance with specifications.
4.2 The results obtained using this test method can be used to compare the relative ability of mortars and plasters to retain water under suction.
4.3 The results obtained using this test method for masonry mortars do not necessarily indicate the degree of water retention when used with masonry units, since the amount of water absorbed by the unit depends on the rate of absorption of the masonry unit.
4.4 The results obtained using this test method for plasters (stucco) do not necessarily indicate the degree of water retention when the plaster is applied as a second coat on the surface of a previously applied plaster base coat, since the amount of water absorbed from the second coat of plaster depends on the rate of absorption of the base coat. This is also true when a plaster is applied as a coating on masonry units.
SCOPE
1.1 This test method provides for the determination of water retention of hydraulic cement-based mortars and plasters.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. When this test method refers to combined-unit standards, the selection of the measurement systems is at the user’s discretion.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)2
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Designation: C1506 − 16b
Standard Test Method for
Water Retention of Hydraulic Cement-Based Mortars and
1
Plasters
This standard is issued under the fixed designation C1506; 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* for Test Methods for Construction Materials
C1437 Test Method for Flow of Hydraulic Cement Mortar
1.1 This test method provides for the determination of water
retention of hydraulic cement-based mortars and plasters.
3. Summary of Test Method
1.2 The values stated in SI units are to be regarded as
3.1 After initial mixing is complete, the flow of the mortar
standard. No other units of measurement are included in this
or plaster is determined.The mortar or plaster is then subjected
standard. When this test method refers to combined-unit
to a controlled vacuum suction for 60 s, after which the flow is
standards, the selection of the measurement systems is at the
again determined. The water retention is the final flow divided
user’s discretion.
by the initial flow expressed as a percentage.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 This test method provides a means for determining the
priate safety and health practices and determine the applica-
ability of mortars and plasters to retain water under suction.
bility of regulatory limitations prior to use. (Warning—Fresh
Test results may be used to determine compliance with
hydraulic cementitious mixtures are caustic and may cause
specifications.
2
chemical burns to skin and tissue upon prolonged exposure.)
4.2 The results obtained using this test method can be used
to compare the relative ability of mortars and plasters to retain
2. Referenced Documents
water under suction.
3
2.1 ASTM Standards:
4.3 The results obtained using this test method for masonry
C109/C109M Test Method for Compressive Strength of
mortars do not necessarily indicate the degree of water
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
retention when used with masonry units, since the amount of
Specimens)
water absorbed by the unit depends on the rate of absorption of
C185 Test Method for Air Content of Hydraulic Cement
the masonry unit.
Mortar
C230/C230M Specification for Flow Table for Use in Tests
4.4 The results obtained using this test method for plasters
of Hydraulic Cement
(stucco) do not necessarily indicate the degree of water
C305 Practice for Mechanical Mixing of Hydraulic Cement
retention when the plaster is applied as a second coat on the
Pastes and Mortars of Plastic Consistency
surface of a previously applied plaster base coat, since the
C511 Specification for Mixing Rooms, Moist Cabinets,
amount of water absorbed from the second coat of plaster
Moist Rooms, and Water Storage Tanks Used in the
depends on the rate of absorption of the base coat. This is also
Testing of Hydraulic Cements and Concretes
true when a plaster is applied as a coating on masonry units.
C670 Practice for Preparing Precision and Bias Statements
5. Apparatus
5.1 Tamper, conforming to Test Method C109/C109M.
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement
and is the direct responsibility of Subcommittee C01.22 on Workability. 5.2 Straightedge, conforming to Test Method C185.
Current edition approved Dec. 1, 2016. Published December 2016. Originally
5.3 Flow Table, conforming to Specification C230/C230M.
approved in 2001. Last previous edition approved in 2016 as C1506 – 16a. DOI:
10.1520/C1506-16B.
5.4 Mixing Apparatus, conforming to the requirements pre-
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM
scribed in Practice C305.
Standards, Vol 04.01.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.5 Filtration Assembly, an apparatus essentially as shown
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in Fig. 1 shall be used. This apparatus consists of a perforated
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. dish resting on a funnel, which is connected by a three-way
*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
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C1506 − 16b
NOTE 1—The gasket is to be synthetic rubber. The stopcock and the bore of the tubing shall be at least 4-mm. A check valve or water trap, or both,
...
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: C1506 − 16a C1506 − 16b
Standard Test Method for
Water Retention of Hydraulic Cement-Based Mortars and
1
Plasters
This standard is issued under the fixed designation C1506; 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 provides for the determination of water retention of hydraulic cement-based mortars and plasters.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
When this test method refers to combined-unit standards, the selection of the measurement systems is at the user’s discretion.
1.3 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 and health practices and determine the applicability of regulatory
limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and
2
tissue upon prolonged exposure.)
2. Referenced Documents
3
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
C185 Test Method for Air Content of Hydraulic Cement Mortar
C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C1437 Test Method for Flow of Hydraulic Cement Mortar
3. Summary of Test Method
3.1 After initial mixing is complete, the flow of the mortar or plaster is determined. The mortar or plaster is then subjected to
a controlled vacuum suction for 60 s, after which the flow is again determined. The water retention is the final flow divided by
the initial flow expressed as a percentage.
4. Significance and Use
4.1 This test method provides a means for determining the ability of mortars and plasters to retain water under suction. Test
results may be used to determine compliance with specifications.
4.2 The results obtained using this test method can be used to compare the relative ability of mortars and plasters to retain water
under suction.
4.3 The results obtained using this test method for masonry mortars do not necessarily indicate the degree of water retention
when used with masonry units, since the amount of water absorbed by the unit depends on the rate of absorption of the masonry
unit.
1
This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.22 on Workability.
Current edition approved Feb. 15, 2016Dec. 1, 2016. Published February 2016December 2016. Originally approved in 2001. Last previous edition approved in 2016 as
C1506 – 16.C1506 – 16a. DOI: 10.1520/C1506-16A.10.1520/C1506-16B.
2
Section on Safety, Manual of Cement Testing, Annual Book of ASTM Standards, Vol 04.01.
3
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 ----------------------
C1506 − 16b
4.4 The results obtained using this test method for plasters (stucco) do not necessarily indicate the degree of water retention
when the plaster is applied as a second coat on the surface of a previously applied plaster base coat, since the amount of water
absorbed from the second coat of plaster depends on the rate of absorption of the base coat. This is also true when a plaster is
applied as a coating on masonry units.
5. Apparatus
5.1 Tamper, conforming to Test Method C109/C109M.
5.2 Straightedge, conforming to Test Method C185.
5.3 Flow Table, conforming to Specification C230/C230M.
5.4 Mixing Apparatus, conforming to the requirements prescribed in Pra
...
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