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  2. Mortar (masonry) - Wikipedia

    en.wikipedia.org/wiki/Mortar_(masonry)

    Mortar holding weathered bricks. Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colours or patterns to masonry walls.

  3. Mortar (weapon) - Wikipedia

    en.wikipedia.org/wiki/Mortar_(weapon)

    Most modern mortar systems consist of four main components: a barrel, a base plate, a bipod and a sight. Modern mortars normally range in calibre from 60 mm (2.36 in) to 120 mm (4.72 in). However, both larger and smaller mortars have been produced. The modern mortar is a muzzle-loaded weapon and relatively simple to operate.

  4. Lime mortar - Wikipedia

    en.wikipedia.org/wiki/Lime_mortar

    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]

  5. Square academic cap - Wikipedia

    en.wikipedia.org/wiki/Square_academic_cap

    The square academic cap, graduate cap, cap, mortarboard [1] (because of its similarity in appearance to the mortarboard used by brickmasons to hold mortar [2]) or Oxford cap [3] is an item of academic dress consisting of a horizontal square board fixed upon a skull-cap, with a tassel attached to the centre.

  6. Mortar and pestle - Wikipedia

    en.wikipedia.org/wiki/Mortar_and_pestle

    A mortar and pestle is a set of two simple tools used to prepare ingredients or substances by crushing and grinding them into a fine paste or powder in the kitchen, laboratory, and pharmacy. The mortar ( / ˈ m ɔːr t ər / ) is characteristically a bowl, typically made of hardwood, metal, ceramic , or hard stone such as granite .

  7. Masonry - Wikipedia

    en.wikipedia.org/wiki/Masonry

    A mason laying a brick on top of the mortar Bridge over the Isábena river in the Monastery of Santa María de Obarra, masonry construction with stones. Masonry is the craft of building a structure with brick, stone, or similar material, including mortar plastering which are often laid in, bound, and pasted together by mortar.

  8. Bombard (weapon) - Wikipedia

    en.wikipedia.org/wiki/Bombard_(weapon)

    Bombard mortar and granite ball projectile of the Knights of Saint John of Jerusalem, Rhodes, 1480–1500. Founded at the request of Pierre d'Aubusson, the bombard was used for close defense of the walls (100–200 m (110–220 yd)) at the Siege of Rhodes. It fired 260 kg (570 lb) granite balls. The bombard weighs about 3,325 kg (7,330 lb).

  9. History of construction - Wikipedia

    en.wikipedia.org/wiki/History_of_construction

    The great Roman development in building materials was the use of hydraulic lime mortar called Roman cement. Previous cultures had used lime mortars but by adding volcanic ash called a pozzolana the mortar would harden under water thus creating a self-healing cement. This provided them with a strong material for bulk walling.