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ASTM-C1357:2005 Edition

ASTM-C1357:2005 Edition

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C1357-05 Standard Test Methods for Evaluating Masonry Bond Strength

Published By Publication Date Number of Pages
ASTM 2005 8
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1.1 These test methods cover the evaluation of flexural bond strength, normal to the bed joints, of masonry built of manufactured masonry units, as determined in accordance with Test Method C 1072. Sampling and testing procedures are referenced, and terms are defined. Two different test methods are specified, each for a different purpose:

1.1.1 The first test 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. Note 1Standard fired clay masonry units are under development but are not now available. When their development is complete, they will be incorporated into these test methods.

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

1.1.4 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 for information only.

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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
2 Terminology
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
Sampling
4 Procedure
Report
Precision and Bias
Keywords
5 A1. STANDARD CONCRETE MASONRY UNITS

A1.1
A2. FABRICATION OF LABORATORY-PREPARED TEST SPECIMENS
A2.1

6 FIG. A2.1
FIG. A2.2
7 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
FIG. A2.3
8 TABLE X1.1

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