ASTM-C1072:2010 Edition

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C1072-10 Standard Test Method for Measurement of Masonry Flexural Bond Strength

Published By	Publication Date	Number of Pages
ASTM	2010	18

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Categories: 91.060.10 - Walls. Partitions. Façades, ASTM

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Description

ASTM C1072-10

Historical Standard: Standard Test Method for Measurement of Masonry Flexural Bond Strength

ASTM C1072

Scope

1.1 These test methods evaluate the flexural bond strength, normal to the bed joints, of masonry built of manufactured masonry units. Sampling and testing procedures are referenced, and terms are defined. Three different specimen fabrication methods are specified, each for a different purpose:

1.1.1 The first method is the “Test Method for Laboratory-Prepared Specimens.” Its purpose is to compare the bond strengths (under the given conditions) of masonry mortars. It could be used, for example, to check the quality of mortar products after production, or to indicate the bond strength (under the given conditions) of a mortar product without requiring the product to be tested in combination with many different units. It is not intended to represent field conditions. It uses standard concrete masonry units. Mortars are batched by weight equivalents of volume proportions and are mixed to a prescribed flow. Prisms are constructed using a jig and are bag-cured.

1.1.2 The second method is the “Test Method for Field-Prepared Specimens.” Its purpose is to evaluate the bond strength (under the given conditions) of a particular unit-mortar combination, either for preconstruction evaluation of materials or for quality control purposes during construction. Mortars are batched conventionally, and the flow is not prescribed. Prisms are constructed conventionally (no jig) and are bag-cured.

1.1.3 The third method is the “Test Method for Prisms Removed from Existing Masonry.” Its purpose is to evaluate the bond strength of unit-mortar combinations of prisms cut from existing walls.

1.1.4 The three methods are not consistent, nor are they intended to be. They are intended to be used for three different purposes. To make this clear, the three methods are presented separately.

1.1.5 Appendix X1 suggests two possible criteria for assessing the bond strength values obtained using these test methods. These possible evaluation criteria are given for illustration only and are not mandatory.

1.2 The values stated in inch-pound units are to be regarded as the 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 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.

Keywords

assemblies; bond; flexural tensile stress; flexure; masonry; Bond strength–masonry/mortar; Cement mortars; Flexural bond strength; Flexural testing–masonry units; Loading tests–concrete; Masonry assemblages; Mortar (bond strength); Prisms; Water retention

ICS Code

ICS Number Code 91.060.10 (Walls. Partitions. Facades)

DOI: 10.1520/C1072-10

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Apparatus Materials Temperature and Humidity Procedure
3	Report Precision and Bias Summary of Test Method Significance and Use Apparatus
4	Sampling Procedure Report
5	Precision and Bias Summary of Test Method Significance and Use Apparatus Test Specimen
6	Procedure Report Precision and Bias Keywords A1. STANDARD CONCRETE MASONRY UNITS A1.1
7	A2. FABRICATION OF LABORATORY-PREPARED TEST SPECIMENS A2.1 FIG. A2.1
8	A3. BOND STRENGTH TESTING APPARATUS AND PROCEDURES A3.1 Apparatus FIG. A2.2 FIG. A2.3
9	A3.2 Test Procedures A3.3 Calculations FIG. A3.1
10	FIG. A3.2
11	FIG. A3.3
12	FIG. A3.4
13	FIG. A3.4
14	FIG. A3.4
15	FIG. A3.5 FIG. A3.6
16	X1. POSSIBLE CRITERIA FOR EVALUATING TEST RESULTS X1.1 Introduction X1.2 Possible Acceptance Criterion Using a Lower Characteristic Value X1.3 Possible Acceptance Criterion Using One-Sided Tolerance Limits
17	X2. DETERMINATION OF WEIGHT AND CENTROID OF UPPER CLAMPING BRACKET X2.1 TABLE X1.1
18	FIG. X2.1

Additional information

Standard Title	C1072-10 Standard Test Method for Measurement of Masonry Flexural Bond Strength
Published Code	ASTM
Publication Date	2010
Pages Count	18
ICS Codes	91.060.10 - Walls. Partitions. Façades