![masonry heaters pdf info masonry heaters pdf info](https://i.pinimg.com/originals/b8/18/9a/b8189aa810d781d0350b191964eacbb1.jpg)
Within the past decade, millions of Americans have discovered the economic benefits and personal pleasures of heating with wood. Lehigh’s high-quality pigments produce color-fast mortar that resists fading from ultraviolet rays and weathering.The Book of Masonry Stoves: Rediscovering an Old Way of Warming by David Lyle Because they are produced under highly controlled conditions, colored masonry cements ensure consistent color throughout the project. White mortar can also serve as a medium for colored mortars and produces cleaner, brighter colors than grey mortar.Ĭolored masonry cement is premixed with pigments to offer a wide range of color. White masonry cement should meet the requirements of ASTM C91 for Type N, S or M masonry cement. White portland cement used for masonry should meet the same ASTM specifications as its gray counterpart. White mortar is made with either white masonry cement or with a blend of white portland cement and lime. However, some contractors prefer to mix all ingredients at the job site. Cement/lime blends in Types N, S and M are covered by ASTM C270 only, Standard Specification for Mortar for Unit Masonry, since the two components, portland cement and lime, are each covered by their respective specifications: ASTM C150, Standard Specification for Portland Cement, and ASTM C207, Standard Specification for Hydrated Lime for Masonry Purposes.įor consistency and convenience, most portland-lime blends are premixed and added to sand and water at the job site to produce mortar. For that reason, it conforms to a separate ASTM designation, C1329, Standard Specification for Mortar Cement.Ĭement-lime masonry cement consists of portland cement and hydrated lime. It is the only cement for mortar that must meet a minimum bond strength. Mortar cement, a relatively new designation, was developed for demanding structural applications and features higher strength and lower air content than masonry cement. ASTM C91 defines masonry cement by physical requirements and performance properties rather than ingredients. The specific components of masonry cement may vary depending on the manufacturer and local construction practices.
![masonry heaters pdf info masonry heaters pdf info](https://www.mha-net.org/wordpress/wp-content/uploads/2011/09/image01-230x300.jpg)
Air-entraining agents protect mortar from freeze-thaw damage and provide additional workability. Masonry cement consists of portland or blended cement, plasticizers, and an air entraining agent. Mortar must conform to ASTM C270, Standard Specification for Mortar for Unit Masonry.
![masonry heaters pdf info masonry heaters pdf info](https://walkerstoves.com/uploads/3/5/2/8/35289194/s589997111497892610_p6_i7_w2560.jpeg)
Mortar cement is covered by ASTM C1329, Standard Specification for Mortar Cement. Masonry cement Types N, S and M are covered by ASTM C91, Standard Specification for Masonry Cements. Types M and S are specified when higher strength is required in load-bearing or below-grade walls. Type N is for general use in most mortar and stucco applications. Types O and K are no longer common in construction and are used primarily for restoration of historic masonry structures. Traditionally, alternating letters of the words "mason work" became the letters used for five types of mortar: Ma So N w Or K, with Type M being the strongest and Type K the weakest.ĪSTM now designates three types of mortar: Type M, Type S and Type N. The American Society for Testing and Materials (ASTM) designates both mortars and the masonry cement used to produce them by types, which are primarily based on strength. Convenience is also a factor.Īn alternative is to mix all the individual ingredients – cement, lime, sand and water – at the job site. Premixed masonry cements offer consistent and uniform performance. Most masonry cements are preblended, ready to be mixed with sand and water at the job site.