ASTM C1403-05
(Test Method)Standard Test Method for Rate of Water Absorption of Masonry Mortars
Standard Test Method for Rate of Water Absorption of Masonry Mortars
SCOPE
1.1 This test method covers a standardized laboratory procedure for determining the relative water absorption by capillary uptake (wicking) characteristics of masonry mortars. This test method is not applicable for determining the effectiveness of water repellent coatings.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
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.
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Designation: C 1403 – 05
Standard Test Method for
1
Rate of Water Absorption of Masonry Mortars
This standard is issued under the fixed designation C 1403; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* account the effect of the masonry substrate or field mixing
procedures, this method is not intended for field use. Data
1.1 This test method covers a standardized laboratory pro-
generated from this test method may be useful for determining
cedure for determining the relative water absorption by capil-
the relative effectiveness of water repellent admixtures or the
lary uptake (wicking) characteristics of masonry mortars. This
effect of other admixtures or mortar components on the water
test method is not applicable for determining the effectiveness
repellencyofamortar.However,usecautionininterpretingthe
of water repellent coatings.
results. While the resistance of masonry to water penetration
1.2 The values stated in SI units are to be regarded as the
may be related to the water absorption of the mortar, it also
standard. The inch-pound units given in parentheses are for
depends on other factors, such as the workmanship, extent of
information only.
bond, and the properties of the masonry units and mortar.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Apparatus
responsibility of the user of this standard to establish appro-
4.1 Balance—A balance sensitive to 0.1 g.
priate safety and health practices and determine the applica-
4.2 Uptake Container—Awatertight container with a mini-
bility of regulatory limitations prior to use.
mum cross sectional area that is at least 50 % greater than the
2. Referenced Documents total area of the specimens’ test surface(s) and a minimum
2
depth of 75 mm (3 in.). Provide a cover for the container to
2.1 ASTM Standards:
minimize evaporation.
C 109/C 109M Test Method for Compressive Strength of
4.2.1 Usespecimensupportsthatallowaminimumof3mm
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
(0.12 in.) clearance from the bottom of the container and that
Specimens)
cover a maximum of 10 % of the area of the specimen’s test
C 270 Specification for Mortar for Unit Masonry
surface. Use supports made of a material that does not float in
C 305 PracticeforMechanicalMixingofHydraulicCement
water and that does not rust, expand, or contract as a result of
Pastes and Mortars of Plastic Consistency
water exposure.
C511 Specification for Moist Cabinets, Moist Rooms and
4.2.2 The container shall be flat so that when a specimen is
Water Storage Tanks Used in the Testing of Hydraulic
set on the supports the water level as specified in 6.4 shall not
Cements and Concretes
vary by more than 1 mm (0.04 in.) from one end of the
C 778 Specification for Standard Sand
specimen to the opposite end.
C 1437 Test Method for Flow of Hydraulic Cement Mortar
4.3 Specimen Molds—Metal 50-mm or 2-in. cube specimen
3. Significance and Use moldswithremovableplasticwatertightdisposableliners.The
plastic liners shall be rigid enough to retain their shape when
3.1 This test method provides a laboratory procedure for
free standing and filled with mortar.
determining the relative water absorption properties over time
4.4 Spoon—Ametal spoon approximately 230 mm (9 in.) in
of mortars used for masonry construction. Because the speci-
lengthandwithabowlapproximately100mm(4in.)inlength.
mensaremadeunderlaboratoryconditionsanddonottakeinto
4.5 Straightedge—A steel straightedge not less than 150
1 1
mm (6 in.) long and approximately 1.5-3.0 mm ( ⁄16 to ⁄8 in.)
1
This test method is under the jurisdiction ofASTM Committee C12 on Mortars
thick.
and Grouts for Unit Masonry and is the direct responsibility of Subcommittee
4.6 Tamper—A tamper made of a nonabsorptive, nonabra-
C12.02 on Research and Methods of Test.
sive, nonbrittle material such as a rubber compound having a
Current edition approved May 15, 2005. Published July 2005. Originally
ShoreAdurometer hardness of 80 6 10, or seasoned oak wood
approved in 1999. Last previous edition approved in 2000 as C 1403–00.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
rendered nonabsorptive by immersion for 15 minutes in
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
paraffin at approximately 200°C (392°F), and having a cross
Standards volume information, refer to the standard’s Document Summary page on
sectionof13by25mm(0.5by1.0in.)andaconvenientlength
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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