1. Scope

1.1 This specification covers mortar for the repair of masonry that was constructed with methods and materials that pre-date the origination of current standards of construction that are compatible with it. The mortar may be used for non-structural purposes such as repointing of the masonry, or for structural purposes such as, but not restricted to, re-construction or repair of mortar joints that contribute to the structural integrity of the masonry.

1.2 Masonry includes the following units laid in mortar: ( 1 ) cast stone, ( 2 ) clay masonry unitsbrick and clay tile, ( 3 ) concrete masonry units, ( 4 ) natural stone, and ( 5 ) terra cotta.

1.3 This specification may be used to pre-qualify mortar for a project.

1.4 Mortars tested using this specification are laboratory-prepared mortars and do not represent in-place, site mortars.

1.5 Use of this specification should be based on a thorough understanding of the function, maintenance, and repair requirements for the preservation and continued performance of the masonry in the context of the building structure and long-term performance. The user of this specification is responsible for examining all criteria and selecting the appropriate mortar formulation and properties required.

1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.7 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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C5 Specification for Quicklime for Structural Purposes

C10 Specification for Natural Cement

C61 Specification for Gypsum Keenes Cement

C91 Specification for Masonry Cement

C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)

C110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone

C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates

C141 Specification for Hydraulic Hydrated Lime for Structural Purposes

C144 Specification for Aggregate for Masonry Mortar

C150 Specification for Portland Cement

C207 Specification for Hydrated Lime for Masonry Purposes

C216 Specification for Facing Brick (Solid Masonry Units Made from Clay or Shale)

C270 Specification for Mortar for Unit Masonry

C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency

C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes

C595 Specification for Blended Hydraulic Cements

C780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry

C948 Test Method for Dry and Wet Bulk Density, Water Absorption, and Apparent Porosity of Thin Sections of Glass-Fiber Reinforced Concrete

C979 Specification for Pigments for Integrally Colored Concrete

C1093 Practice for Accreditation of Testing Agencies for Masonry

C1157 Performance Specification for Hydraulic Cement

C1180 Terminology of Mortar and Grout for Unit Masonry

C1329 Specification for Mortar Cement

C1357 Test Methods for Evaluating Masonry Bond Strength

C1384 Specification for Admixtures for Masonry Mortars

C1400 Guide for Reduction of Efflorescence Potential in New Masonry Walls

C1403 Test Method for Rate of Water Absorption of Masonry Mortars

C1489 Specification for Lime Putty for Structural Purposes

C1506 Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters

C1707 Specification for Pozzolanic Hydraulic Lime for Structural Purposes

E96/E96M Test Methods for Water Vapor Transmission of Materials

E2260 Guide for Repointing (Tuckpointing) Historic Masonry

Keywords

absorption rate; air content; compressive strength; flexural bond strength; hydrated lime; hydraulic cement; hydraulic lime; lime putty; masonry; natural cement; portland cement masonry cement; preservation; repointing; total porosity; water retention; water vapor permeability;

ICS Code

ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)

DOI: 10.1520/C1713-11

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