Significance and Use
3.1 These procedures are useful for research into bond strength of masonry. They are not intended to predict the bond strength of commercial masonry construction. The bond strength in commercially built structures is determined by many factors beyond the characteristics of mortar, masonry units, and the procedures of this test method.
—The crossed-brick couplets method measures a direct tensile strength of the bond between the mortar and masonry unit. It does not determine the flexural strength of the unit mortar assembly. Other test methods may be more appropriate for determining the flexural bond strength between mortar and masonry units. These include Test Methods C1072 and Test Methods E518.
1.1 This test method provides two procedures for measuring bond strength of mortar to masonry units: a crossed brick couplet tensile test for evaluating mortar-brick bond strength and a stacked-bond, flexural test for evaluating mortar-concrete block bond strength.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C67 Test Methods for Sampling and Testing Brick and Structural Clay Tile
C90 Specification for Loadbearing Concrete Masonry Units
C129 Specification for Nonloadbearing Concrete Masonry Units
C140 Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C270 Specification for Mortar for Unit Masonry
C780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C1072 Test Methods for Measurement of Masonry Flexural Bond Strength
C1437 Test Method for Flow of Hydraulic Cement Mortar
E518 Test Methods for Flexural Bond Strength of Masonry
bond; concrete masonry unit; crossed brick couplet; mortar; masonry;
ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)
ASTM International is a member of CrossRef.
Citing ASTM Standards
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