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  2. Quern-stone - Wikipedia

    en.wikipedia.org/wiki/Quern-stone

    Quern-stones are stone tools for hand-grinding a wide variety of materials, especially for various types of grains. They are used in pairs. The lower stationary stone of early examples is called a saddle quern, while the upper mobile stone is called a muller, rubber, or handstone. The upper stone was moved in a back-and-forth motion across the ...

  3. 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 .

  4. Concrete pavement restoration - Wikipedia

    en.wikipedia.org/wiki/Concrete_Pavement_Restoration

    CPP and CPR methods, developed over the last 40 years, are used in lieu of asphalt overlays and bituminous patches to repair roads when longer lasting solutions are desired. When installing pavers over top of an existing asphalt of concrete pad, there are three installation options: sand set, bituminous set, and mortar set. [1]

  5. Masonry trowel - Wikipedia

    en.wikipedia.org/wiki/Masonry_trowel

    Brick trowel: or mason's trowel is a point-nosed trowel for spreading mortar on bricks or concrete blocks with a technique called "buttering". The shape of the blade allows for very precise control of mortar placement. Bucket trowel: a wide-bladed tool for scooping mortar from a bucket; it is also good for buttering bricks and smoothing mortar.

  6. Ground granulated blast-furnace slag - Wikipedia

    en.wikipedia.org/wiki/Ground_granulated_blast...

    It is a strength-enhancing compound improving the durability of concrete. It is a component of metallurgic cement ( CEM III in the European norm EN 197 ). Its main advantage is its slow release of hydration heat , allowing limitation of the temperature increase in massive concrete components and structures during cement setting and concrete ...

  7. Masonry - Wikipedia

    en.wikipedia.org/wiki/Masonry

    Masonry walls have an endothermic effect of its hydrates, as in chemically bound water, unbound moisture from the concrete block, and the poured concrete if the hollow cores inside the blocks are filled. Masonry can withstand temperatures up to 1,000 °F (538 °C) and it can withstand direct exposure to fire for up to 4 hours.

  8. Obturating ring - Wikipedia

    en.wikipedia.org/wiki/Obturating_ring

    An obturating ring which is called driving band made of a softer material is the standard solution for that problem. Mortar bombs also use obturating rings to provide a seal around the projectile. [ citation needed ] Recoilless rifles and some artillery use rings with a reverse impression of the rifling cut in them for a tighter seal even at ...

  9. Hydraform International - Wikipedia

    en.wikipedia.org/wiki/Hydraform_International

    Hydraform International Pty Ltd. is a manufacturer of brick and blockmaking machines. It was founded in Johannesburg, South Africa. [1] The company specialises in brick and blockmaking machines and accessories that enable the development of a stabilised soil cement block or a compressed earth block (CEB).

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