Active Standard ASTM C1142 | Developed by Subcommittee: C12.03
Book of Standards Volume: 04.05
Historical (view previous versions of standard)
This specification covers extended life mortar of types RM, RS, RN, and RO, for use in construction of non-reinforced or reinforced unit masonry. Materials used as ingredients in extended life mortar shall be of the following: Portland cement, masonry cement, hydrated lime, aggregates, water, and admixtures. Water shall be clean and free of oils, acids, alkalines, salts, organic materials or other substances that may be deleterious to mortar or corrosive to metals in the masonry. Mortar shall conform to average compressive strength, water retention, and air content indicated in this specification. Specimen for laboratory testing shall have attained final set. Moreover, moist storage and curing condition of specimen shall conform to the specification. For testing, the cone penetration method shall be utilized to determine the consistency of the mortar. The air content of the mortar shall be determined by either the pressure method or the volumetric method.
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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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C91 Specification for Masonry Cement
C144 Specification for Aggregate for Masonry Mortar
C150 Specification for Portland Cement
C207 Specification for Hydrated Lime for Masonry Purposes
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
E447 Test Method for Compressive Strength of Laboratory Constructed Masonry Prisms
E518 Test Methods for Flexural Bond Strength of Masonry
ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)