Certain aspects of performance are highlighted here. The weather-resistant finish is durable in all climates. PerformanceĮxterior portland cement plaster is subject to all types of weather conditions, from hot to cold and wet to dry. Because portland cement plaster is not as strong as portland cement concrete and is applied substantially less thick, some plaster cracks will be. These documents cover the ingredients and the application of portland cement plaster, or stucco. According to the Portland Cement Association (PCA), a crack in concrete 0.010 inch to 0.015 inch (0.254 mm to 0.381 mm) wide neither hurts the surface appearance nor disturbs the viewer (PCA 1982). They agree on what constitutes “best practice” and develop standards to reflect that. ASTM generates consensus documents with the input of many people, including contractors, engineers, architects, and material producers/suppliers. There are two main standards organizations in North America, the American Society for Testing and Materials (ASTM) and the Canadian Standards Association (CSA). CSA A3001, Cementitious Materials for Use in Concreteįind a cement supplier.ASTM C 1328, Standard Specification for Plastic (Stucco) Cement.ASTM C 1157, Standard Performance Specification for Hydraulic Cement.ASTM C 979, Specification for Pigments for Integrally Colored Concrete.Portland cement, the same material that is the basis for the hardened properties of concrete used to build super-highways, bridges, and skyscrapers, provides. It consists of portland cement-based materials and sand, mixed with water to form a workable plaster. ASTM C 897, Standard Specification for Aggregates for Job-Mixed Portland Cement-Based Plasters Traditional portland cement plaster (stucco) is a time-tested exterior finish.As you design and construct stucco projects, you may need some assistance. It provides an economical hard surface that is rot, rust, and fire resistant, which can be colored and finished in a wide range of textures to adorn any architectural style. ASTM C 595, Standard Specification for Blended Hydraulic Cements Stucco, the common term for portland cement plaster, is a popular exterior finish for buildings.ASTM C 207, Standard Specification for Hydrated Lime for Masonry Purposes.Plaster is applied either by hand or machine to exterior and interior wall surfaces in two or three coats. ASTM C 150, Standard Specification for Portland Cement Portland cement plaster (stucco) is a building facing material consisting of portland cement-based materials and sand, mixed with water to form a workable mixture.ASTM C 91, Standard Specification for Masonry Cement.It usually meets the ASTM C 897 specification, though other gradations are allowed when plaster will be applied by hand (not machine). Its grains are cemented together by the paste. plastic cement (ASTM C 1328) is primarily available in the west and southwestern United Statesįine aggregate, or sand, makes up the bulk of the volume of plaster. BMI 950 is a masonry mortar for many different products like: brick veneer, brick, concrete brick, concrete block and stone.
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