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Gypsum mortar is an ancient mortar used in construction. A component of Portland cement used to prevent flash setting (too rapid hardening) of concrete . A wood substitute in the ancient world: For example, when wood became scarce due to deforestation on Bronze Age Crete , gypsum was employed in building construction at locations where wood was ...
The mortar and pestle, with the Rod of Asclepius, the Green Cross, and others, is one of the most pervasive symbols of pharmacology. [10] For pharmaceutical use, the mortar and the head of the pestle are usually made of porcelain, while the handle of the pestle is made of wood. This is known as a Wedgwood mortar and pestle and originated in 1759.
Lime mortar or torching [1] [2] is a masonry mortar composed of lime and an aggregate such as sand, mixed with water. It is one of the oldest known types of mortar, used in ancient Rome and Greece, when it largely replaced the clay and gypsum mortars common to ancient Egyptian construction. [3]
Decorative use of portland cement panels on London's Grosvenor estate [16] The most common use for portland cement is in the production of concrete. [17] Concrete is a composite material consisting of aggregate (gravel and sand), cement, and water. As a construction material, concrete can be cast in almost any shape desired, and once hardened ...
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 BCE. [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.
A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. Concrete is the most ...
Type S lime is almost always dolomitic lime, hydrated under heat and pressure in an autoclave, and used in mortar, render, stucco, and plaster. Type S lime is not considered reliable as a pure binder in mortar due to high burning temperatures during production. Kankar lime, a lime made from kankar which is a form of calcium carbonate.
The MO-120 RT (factory designator) or MO-120-RT is a French heavy mortar.The RT in the designator stands for rayé, tracté, which means rifled, towed.The MO-120-RT is currently used by the French Army (where it is known as RT F1 or Mortier de 120 mm Rayé Tracté Modèle F1—"120 mm rifled towed mortar, model F1"), and has also been exported to more than 24 foreign countries or in some cases ...