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The history of thinset dates back to the post-World War II era when the tile industry sought more efficient methods for tile installation. [7] Before thinset, the standard method for installing tiles was the thick-set or mud-set method, which involved a thick layer of a sand and cement mixture.
The thick bed mortar method has been around for hundreds, if not thousands of years. Historically, a sand/cement mixture was mixed with water to a fairly dry consistency and was spread on either a portland cement water paste (neat cement), or over cement powder spread on the surface which is then sprayed with water to create a slurry coat and spread over the surface. [1]
The first tile cutter was designed to facilitate the work and solve the problems that masons had when cutting a mosaic of encaustic tiles (a type of decorative tile with pigment, highly used in 1950s, due to the high strength needed because of the high hardness and thickness of these tiles).
The excavation of the underground aqueduct of Megara revealed that a reservoir was coated with a pozzolanic mortar 12 mm thick. This aqueduct dates back to c. 500 BC. [9] Pozzolanic mortar is a lime based mortar, but is made with an additive of volcanic ash that allows it to be hardened underwater; thus it is known as hydraulic cement.
This 5 ⁄ 16 inch (7.9 mm) thick cement board is designed as an underlayment for tile floors. These are 3-by-5-foot (91 by 152 cm) sheets. These are 3-by-5-foot (91 by 152 cm) sheets. A cement board is a combination of cement and reinforcing fibers formed into sheets, of varying thickness that are typically used as a tile backing board. [ 1 ]
The 12-inch coast defense mortar was a weapon of 12-inch (305 mm) caliber emplaced during the 1890s and early 20th century to defend US harbors from seaborne attack. [note 1] In 1886, when the Endicott Board set forth its initial plan for upgrading the coast defenses of the United States, it relied primarily on mortars, not guns, to defend American harbors.
In 2024 BAE systems delivered to the US army a prototype variant of the AMPV that fielded the Patria NEMO mortar turret. [25] As of May 2024, it is unknown whether or not the US army will be moving forward with this prototype. In September 2024, trials of the AMPV equipped with a Patria NEMO mortar turret took place in Fort Moore, Georgia. [26]
M120 Rak is a self-propelled wheeled gun-mortar equipped with an automatically loaded 120 mm mortar mounted on a tracked (SMG 120 / M120G) [2] and wheeled (SMK 120 / M120K) [2] chassis, designed by Huta Stalowa Wola (HSW). It is produced in Poland, and used by Polish Land Forces. Serial production and the first delivery started in 2017. [3]