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ASTM C1403-15

Historical Revision

Standard Test Method for Rate of Water Absorption of Masonry Mortars

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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 standard. No other units of measurement are included in this standard.

1.2.1 Inch-pound units are given in parentheses for temperature specification and 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.


4.1 This test method provides a laboratory procedure for determining the relative water absorption properties over time of mortars used for masonry construction. Because the specimens are made under laboratory conditions and do not take into account the effect of the masonry substrate or field mixing procedures, this method is not intended for field use. Data generated from this test method may be useful for determining the relative effectiveness of water repellent admixtures or the effect of other admixtures or mortar components on the water repellency of a mortar. However, use caution in interpreting the results. While the resistance of masonry to water penetration may be related to the water absorption of the mortar, it also depends on other factors, such as the workmanship, extent of bond, and the properties of the masonry units and mortar.

Note 1: This test method is specified in Specification C1384 for demonstrating compliance of mortar admixtures classified as Water Repellent. In this compliance testing, the admixed mortar is compared to a reference mortar made with the same mortar materials except that it does not include the admixture. For quality control testing of water repellent preblended dry mortar mixes, the reference mortar is not typically available since the water repellent additive is added during the manufacturing process prior to bagging the final product. In these cases, the procedure in Annex A1 can be used to determine the relative resistance of the mortar to absorption by capillary uptake.

SDO ASTM: ASTM International
Document Number C1403
Publication Date July 1, 2015
Language en - English
Page Count 5
Revision Level 15
Supercedes
Committee C12.02
Publish Date Document Id Type View
Dec. 1, 2022 C1403-22A Revision
Aug. 1, 2022 C1403-22 Revision
July 1, 2015 C1403-15 Revision
Dec. 15, 2014 C1403-14 Revision
July 15, 2013 C1403-13 Revision
Dec. 15, 2012 C1403-12 Revision
Dec. 15, 2006 C1403-06 Revision
May 15, 2005 C1403-05 Revision
Nov. 10, 2000 C1403-00 Revision