![]() Surfaces of solid bases such as masonry, stone, cast-in-place or precast concrete shall be prepared either by sandblasting, wire brushing, acid etching, chipping, or a combination thereof. The materials used shall consist of the following: cement which shall be a Portland cement, air-entraining Portland cement, masonry cement, blended hydraulic cement, air-entraining blended hydraulic cement, or plastic cement Type S hydrated lime aggregates such as perlite and sand for base and job-mixed finish coats water to be used in mixing admixtures and fibers. ![]() It also sets forth tables for proportioning of various plaster mixes and plaster thickness. 3/8” Brown Coat (applied over the scratch coat while still “green” in order to obtain a monolithic bond between the two application coats.This specification covers the standard requirements for the application of full thickness Portland cement-based plaster for exterior (stucco) and interior work. Now, Refer to Figure 2 The ASTM standards are written for a 3 coat system over metal lath with a fin- ished color coat of cement plaster: 1. What are the ASTM standards for cement plaster coatings? ASTM D2939-98 covers procedures for sampling and testing emulsified bitumens used in relatively thick films as protective coatings for metals and built-up roofs…. WRONG!ĪSTM D2939-98 pdf free download.Standard Test Methods for Emulsified Bitumens Used as Protective Coatings. These are two small docu- ments with prescriptive requirements that are easily read and understood. The code references the ASTM C926 for the application of stucco and the ASTM C1063 for the application of the metal lath (we will cover that later – assume for now it does). ![]() ASTM C926-20 covers the minimum technical requirements for the application of full thickness portland cement-based plaster for exterior (stucco) and interior work. ![]() The size of this standard pdf file is 6.39M. ASTM C926-20 ,Standard Specification for Application of Portland Cement-Based Plaster. ![]()
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