ASTM C270 PDF

More C Four types of mortar are covered in each of two alternative specifications: 1 proportion specifications and 2 property specifications. The property specification applies to mortar mixed to a specific flow in the laboratory. When neither proportion nor property specifications are specified, the proportion specifications shall govern, unless data are presented to and accepted by the specifier to show that mortar meets the requirements of the property specifications.

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You are on page 1of 14 Search inside document Standard Specification for Mortar for Unit Masonry1 This standard is issued under the fixed designation C; 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 indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the U. Department of Defense. Scope 2. Referenced Documents 1. Hydraulic Cement Mortars Using 2-in. Pastes and Mortars of Plastic Consistency 1. These notes and Moist Rooms, and Water Storage Tanks Used in the footnotes excluding those in tables and figures shall not be Testing of Hydraulic Cements and Concretes considered as requirements of the standard.

Masonry 1. The values given in parentheses are mathematical Units conversions to SI units that are provided for information only C Specification for Pigments for Integrally Colored Con- and are not considered standard. It is the responsibility of the user of this Masonry standard to establish appropriate safety and health practices C Performance Specification for Hydraulic Cement and determine the applicability of regulatory limitations prior C Terminology of Mortar and Grout for Unit Masonry to use.

Published December Last previous edition approved in as C Cement-Based Mortars and Plasters 4. Through Masonry 4. Specification Limitations 4. The property performance record to be not detrimental to the soundness of specification of this standard applies to mortar mixed to a the mortar.

Admixtures shall not add more than 65 ppm of mortar as tested in the laboratory nor that of the mortar in the 0. Materials accordance with Specification C B See Note 6. Mate- 4. For example, laboratory prepared mortars batched to the proportions listed in Table 2 will, in many cases, 5. Requirements considerably exceed the compressive strength requirements of Table 1.

This quantity of water is not sufficient to produce a mortar type of known higher strength shall not be indiscrimi- mortar with a workable consistency suitable for laying masonry units in the field. Mortar for use in the field must be mixed with the maximum nately substituted where a mortar type of anticipated lower amount of water, consistent with workability, in order to provide sufficient strength is specified. The properties of laboratory prepared mortar at a flow of 6 5, as 5.

The properties of field requirements of Section 4 and the proportion specifications prepared mortar mixed with the greater quantity of water, prior to being requirements of Table 2. See Appendix X1 or Appendix X3 for placed in contact with the masonry units, will differ from the property requirements in Table 1. Therefore, the property requirements in Table 1 a guide for selecting masonry mortars.

Test Method C may be used for this purpose. The laboratory prepared mortar shall consist of a mixture of cementitious material, aggregate, and water, all conforming to 6. Test Methods the requirements of Section 4 and the properties of the 6. See Appendix X1 for a guide for selecting masonry this property specification shall contain construction materials mortars.

Not less than M

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You are on page 1of 14 Search inside document Standard Specification for Mortar for Unit Masonry1 This standard is issued under the fixed designation C; 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 indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the U. Department of Defense. Scope 2.

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MORTARS FOR CONCRETE MASONRY

Mortar serves many important functions: it bonds units together into an integral structural assembly, seals joints against penetration by air and moisture, accommodates small movements within a wall, accommodates slight differences between unit sizes, and bonds to joint reinforcement, ties and anchors so that all elements perform as an assembly. In addition, Type N masonry cement can be combined with portland cement or blended hydraulic cement to produce Type S or M mortars. Quicklime must be slaked combined chemically with water prior to use. The resultant lime putty must be stored and allowed to hydrate for at least 24 hours before use. Consequently, quicklime is rarely used in mortar.

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