ASTM C1142-95(2001)
(Specification)Standard Specification for Extended Life Mortar for Unit Masonry
Standard Specification for Extended Life Mortar for Unit Masonry
SCOPE
1.1 This specification covers extended life mortar as delivered for use in construction of non-reinforced or reinforced unit masonry.
1.2 This specification is a property standard.
1.3 Four types of mortar are covered: RM, RS, RN, and RO. These types of mortar can be manufactured by using one of the four mortar formulations with masonry aggregate: portland cement, portland cement-lime, masonry cement, or masonry cement with portland cements. The materials are listed in Section 5.
1.4 Appendix X1 provides a rationale statement and commentary.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C 1142 – 95 (Reapproved 2001)
Standard Specification for
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Extended Life Mortar for Unit Masonry
This standard is issued under the fixed designation C 1142; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 44, Specifications, Tolerances, and Other Technical Re-
quirements for Commercial Weighing and Measuring
1.1 This specification covers extended life mortar as deliv-
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Devices
eredforuseinconstructionofnon-reinforcedorreinforcedunit
masonry.
3. Terminology
1.2 This specification is a property standard.
3.1 Definitions of Terms Specific to This Standard:
1.3 Four types of mortar are covered: RM, RS, RN, and RO.
3.1.1 All terms in this specification have their conventional
These types of mortar can be manufactured by using one of the
meaning, except as follows:
four mortar formulations with masonry aggregate: portland
3.1.2 extended life mortars—mortar consisting of cementi-
cement, portland cement-lime, masonry cement, or masonry
tious materials, aggregate, water and set-control admixtures
cement with portland cements. The materials are listed in
which are measured and mixed at a central location, using
Section 5.
weight-or-volume-control equipment.This mortar, as delivered
1.4 Appendix X1 provides a rationale statement and com-
to a construction site, shall be usable for a period in excess of
mentary.
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2 ⁄2 h.
2. Referenced Documents
4. Ordering Information
2.1 ASTM Standards:
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4.1 The purchaser shall specify the following:
C 91 Specification for Masonry Cement
3 4.1.1 The mortar type in Table 1,
C 144 Specification for Aggregate for Masonry Mortar
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4.1.2 Length of workability time for the mortar, and
C 150 Specification for Portland Cement
4.1.3 Desired consistency satisfactory for the mason’s use
C 207 Specification for Hydrated Lime for Masonry Pur-
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when tested by the manufacturer in accordance with 10.2.
poses
3 4.2 At the request of the purchaser, the producer shall, prior
C 270 Specification for Mortar for Unit Masonry
to delivery, furnish laboratory and field performance data
C 780 Test Method for Preconstruction and Construction
satisfactory to the purchaser that the materials to be used will
Evaluation of Mortars for Plain and Reinforced Unit
3 produce mortar of the type specified.
Masonry
C 1072 Test Method for Measurement of Masonry Flexural
NOTE 1—The purchase order or contract may list the mortar ingredients
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Bond Strength desired and may state a list of optional data, which are in addition to the
performance requirements in Section 7. Examples of such tests are: Test
E 447 Test Methods for Compressive Strength of Masonry
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Method C 1072, Test Methods E 518, Test Methods E 447, and test data
Prisms
for mortar that has been retempered.
E 518 Test Methods for Flexural Bond Strength of Ma-
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sonry
5. Materials
2.2 Other Document:
5.1 Materials used as ingredients in extended life mortar
National Institute of Standards and Technology, Handbook
shall conform to the requirements specified in 5.1.1 through
5.1.4.2.
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5.1.1 Cementitious Materials—Cementitiousmaterialsshall
This specification is under the jurisdiction of ASTM Committee C12 on
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom- conform to the following ASTM specifications.
mittee C12.03 on Specifications for Mortars.
Current edition approved July 15, 1995. Published September 1995. Originally
published as C 1142 – 90. Last previous edition C 1142 – 94.
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Annual Book of ASTM Standards, Vol 04.01. Available from Superintendent of Documents, U.S. Government Printing
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Annual Book of ASTM Standards, Vol 04.05. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C 1142
TABLE 1 Property Specification Requirements
6.4.1 Thoroughly mix and deliver to the construction site
A
Avg Compressive mortar with a satisfactory degree of workability and without
Water Air
Strength
B
segregation of ingredients.
Mortar Type Retention Content,
at 28 days,
min, % max, %
6.4.2 Temperature of the mortar at time of delivery shall be
min psi, (MPa)
40 to 120°F (4 to 49°C).
Cubes
RM 2500 (17.2) 75 18
RS 1800 (12.4) 75 18
7. Property Requirements
RN 750 (5.2) 75 18
7.1 When sampled and tested in accordance with Sections 9
RO 350 (2.4) 75 18
A
and 10 respectively, the mortar shall comply with the appro-
Twenty-eight days old from date of casting. Refer to 10.3.1. The strength
values as shown are the standard values. Intermediate values may be specified in
priate section
...
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