ASTM C926-17 - 1.1.2017
 
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 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.

1.4 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.

1.5 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.

 
2. Referenced Documents

C11-23

Standard Terminology Relating to Gypsum and Related Building Materials and Systems

C897-15(2020)

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

C35-01(2019)

Standard Specification for Inorganic Aggregates for Use in Gypsum Plaster

C150-07

Standard Specification for Portland Cement

C206-14(2022)

Standard Specification for Finishing Hydrated Lime

C219-20a

Standard Terminology Relating to Hydraulic and Other Inorganic Cements (Includes all amendments and changes 8/28/2020).

C260-10

Standard Specification for Air-Entraining Admixtures for Concrete

C578-23

Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation

C595-08

Standard Specification for Blended Hydraulic Cements

C631-09(2020)

Standard Specification for Bonding Compounds for Interior Gypsum Plastering

C932-06(2019)

Standard Specification for Surface-Applied Bonding Compounds for Exterior Plastering

C1063-23

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

C1116-03

Standard Specification for Fiber-Reinforced Concrete and Shotcrete

C1328-05

Standard Specification for Plastic (Stucco) Cement

C1787-23

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

E90-23

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

C91-05

Standard Specification for Masonry Cement

C207-18

Standard Specification for Hydrated Lime for Masonry Purposes

E119-22

Standard Test Methods for Fire Tests of Building Construction and Materials

E492-22

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

C25-19

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