ASTM C926-19a - 1.6.2019
 
1. Scope

1.1 This specification covers the requirements for the application of full thickness portland cement-based plaster for exterior (stucco) and interior work. These requirements do not by default define a unit of work or assign responsibility for contractual purposes, which is the purview of a contract or contracts made between contracting entities.

1.2 This specification sets forth tables for proportioning of various plaster mixes and plaster thickness.

Note 1: General information will be found in Annex A1. Design considerations will be found in Annex A2.

1.3 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.

1.4 Details of construction for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.

1.5 The values stated in inch-pound units are to be regarded as the standard. The SI (metric) values given in parentheses are approximate and are provided for information purposes only.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

 
2. Referenced Documents

C11

Terminology Relating to Gypsum and Related Building Materials and Systems

C897

Specification for Aggregate for Job-Mixed Portland Cement-Based Plasters

C35

Specification for Inorganic Aggregates for Use in Gypsum Plaster

C150

Specification for Portland Cement

C206

Specification for Finishing Hydrated Lime

C219

Terminology Relating to Hydraulic Cement

C260

Specification for Air-Entraining Admixtures for Concrete

C578

Specification for Rigid, Cellular Polystyrene Thermal Insulation

C595

Specification for Blended Hydraulic Cements

C631

Specification for Bonding Compounds for Interior Gypsum Plastering

C932

Specification for Surface-Applied Bonding Compounds for Exterior Plastering

C1063

Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster

C1116

Specification for Fiber-Reinforced Concrete and Shotcrete

C1328

Specification for Plastic (Stucco) Cement

C1787

Specification for Installation of Non Metallic Plaster Bases (Lath) Used with Portland Cement Based Plaster in Vertical Wall Applications

E90

Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements

C91

Specification for Masonry Cement

C207

Specification for Hydrated Lime for Masonry Purposes

E119

Test Methods for Fire Tests of Building Construction and Materials

E492

Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine

C25

Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime