ASTM C1403-00
(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 ae 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 – 00
Standard Test Method for
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 * generated from this test method may be useful for determining
the relative effectiveness of water repellent admixtures or the
1.1 This test method covers a standardized laboratory pro-
effect of other admixtures or mortar components on the water
cedure for determining the relative water absorption by capil-
repellencyofamortar.However,usecautionininterpretingthe
lary uptake (wicking) characteristics of masonry mortars. This
results. While the resistance of masonry to water penetration
test method is not applicable for determining the effectiveness
may be related to the water absorption of the mortar, it also
of water repellent coatings.
depends on other factors, such as the workmanship, extent of
1.2 The values stated in SI units are to be regarded as the
bond, and the properties of the masonry units and mortar.
standard. The inch-pound units given in parentheses are for
information only.
4. Apparatus
1.3 This standard does not purport to address all of the
4.1 Balance—A balance sensitive to 0.1 g.
safety concerns, if any, associated with its use. It is the
4.2 Immersion Tank—A watertight container with a mini-
responsibility of the user of this standard to establish appro-
mum cross section of 300 by 300 mm (12 by 12 in.) and a
priate safety and health practices and determine the applica-
minimum depth of 75 mm (3 in.) and with a suitable cover to
bility of regulatory limitations prior to use.
minimize evaporation. Provide specimen supports that allow a
2. Referenced Documents minimum of 3 mm (0.12 in.) clearance from the bottom of the
container and that cover a maximum of 10 % of the specimen
2.1 ASTM Standards:
surface area. Provide a flat tank so that when a specimen is set
C 109/C 109M Test Method for Compressive Strength of
on the supports the water level as specified in 6.4 shall not vary
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
by more than 1 mm (0.04 in.) from one end of the specimen to
Specimens)
the opposite end.
C 270 Specification for Mortar for Unit Masonry
4.3 Specimen Molds—Metal 50-mm or 2-in. cube specimen
C 305 PracticeforMechanicalMixingofHydraulicCement
moldswithremovableplasticwatertightdisposableliners.The
Pastes and Mortars of Plastic Consistency
plastic liners shall be rigid enough to retain their shape when
C 511 Specification for Moist Cabinets, Moist Rooms and
free standing and filled with mortar.
Water Storage Tanks Used in the Testing of Hydraulic
2 4.4 Spoon—Ametal spoon approximately 230 mm (9 in.) in
Cements and Concretes
lengthandwithabowlapproximately100mm(4in.)inlength.
C 778 Specification for Standard Sand
2 4.5 Straightedge—A steel straightedge not less than 150
C 1437 Test Method for Flow of Hydraulic Cement Mortar
1 1
mm (6 in.) long and approximately 1.5-3.0 mm ( ⁄16 to ⁄8 in.)
3. Significance and Use thick.
4.6 Tamper—A tamper made of a nonabsorptive, nonabra-
3.1 This test method provides a laboratory procedure for
sive, nonbrittle material such as a rubber compound having a
determining the relative water absorption properties over time
ShoreAdurometer hardness of 80 6 10, or seasoned oak wood
of mortars used for masonry construction. Because the samples
rendered nonabsorptive by immersion for 15 minutes in
are made under laboratory conditions and do not take into
paraffin at approximately 200°C (392°F), and having a cross
account the effect of the masonry substrate or field mixing
sectionof13by25mm(0.5by1.0in.)andaconvenientlength
procedures, this method is not intended for field use. Data
of 127 to 152 mm (5 to 6 in.). The tamping face of the tamper
shall be flat and at right angles to the length of the tamper.
This test method is under the jurisdiction ofASTM Committee C12 on Mortars
4.7 Trowel, having a steel blade 100 to 150 mm (4 to 6 in.)
and Grouts for Unit Masonry and is the direct responsibility of Subcommittee
in length, with straight edges.
C12.02 on Research and Methods of Test.
4.8 Tapping Stick—A hardwood rod, having a diameter of
Current edition approved Nov. 10, 2000. Published December 2000. Originally
16 mm ( ⁄8 in.) and a length of 150 mm (6 in.).
published as C 1403–99. Last previous edition C 1403-99a.
Annual Book of ASTM Standards, Vol 04.01.
Annual Book of ASTM Standards, Vol 04.05.
*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.
C 1403
4.9 Timing Device—A suitable timing device capable of width of the cube test surface to the nearest 0.5 mm at three
indicating elapsed time up to 24 h to the nearest 1 min. locations along its height and record as L the average width in
4.10 Calipers—Suitablecaliperswithparalleljawsformea- millimetres to the nearest 0.5 mm.
suring the dimensions of the hardened specimens to the nearest 6.2 Record as W the initial weight in grams to the nearest
0.5 mm.
0.1 g of each individual specimen immediately prior to testing.
6.3 Place the immersion tank on a flat level surface. Place
5. Specimen Preparation
all specimens in the immersion tank(s) with their top faces, as
5.1 Prepare mortar according to Practice C 305, adjusting
cast, in contact with the specimen supports as illustrated in Fig.
the water as necessary to obtain a flow of 110 6 5as
1.
determined by Test Method C 1437. Record the flow. If a
6.4 Add water to the immersion tank(s) so that the speci-
modifier is being added to the mortar, the dosage rate, time of
mens are partially immersed in 3.0 6 0.5 mm (0.12 6 0.02 in.)
addition, and mixing sequence shall follow the manufacturer’s
of water. Cover the immersion tank(s) to minimize evapora-
recommendation. If there is no manufacturer’s recommenda-
tion.
tion, add a liquid modifier with the water and add a dry
6.5 At 0.25, 1, 4, and 24 h, measure the weight in grams to
modifier w
...
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