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  2. 3D concrete printing - Wikipedia

    en.wikipedia.org/wiki/3D_concrete_printing

    TU/e Built Environment's Rohaco 3D Concrete Printer being extensively used for Concrete Printing Research. 3D concrete printing, or simply concrete printing, refers to digital fabrication processes for cementitious materials based on one of several different 3D printing technologies. 3D-printed concrete eliminates the need for formwork, reducing material waste and allowing for greater ...

  3. Cement render - Wikipedia

    en.wikipedia.org/wiki/Cement_render

    Rendered house in France. Cement render or cement plaster is the application of a mortar mix of sand and cement, (optionally lime) and water to brick, concrete, stone, or mud brick. It is often textured, colored, or painted after application. It is generally used on exterior walls but can be used to feature an interior wall. [1]

  4. Sulfate attack in concrete and mortar - Wikipedia

    en.wikipedia.org/wiki/Sulfate_attack_in_concrete...

    The attack arises from soils containing SO2−. 4 ions, such as MgSO 4 or Na 2 SO 4 soluble and hygroscopic salts. The tricalcium aluminate (C 3 A) hydrates first interact with sulfate ions to form ettringite (AFt). Ettringite crystallizes into small acicular needles slowly growing in the concrete pores. Once the pores are completely filled ...

  5. Sika AG - Wikipedia

    en.wikipedia.org/wiki/Sika_AG

    33,000 (2022) Website. www.sika.com. Sika AG is a Swiss multinational specialty chemical company that supplies to the building and motor vehicle industries, headquartered in Baar, Switzerland. Sika was founded in 1910 by Kaspar Winkler. Currently, it has over 33,000 employees, subsidiaries in more than 100 countries, and an annual sales ...

  6. Superplasticizer - Wikipedia

    en.wikipedia.org/wiki/Superplasticizer

    Superplasticizers (SPs), also known as high range water reducers, are additives used for making high-strength concrete or to place self-compacting concrete. Plasticizers are chemical compounds enabling the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.

  7. XM395 Precision Guided Mortar Munition - Wikipedia

    en.wikipedia.org/wiki/XM395_Precision_Guided...

    Design. Based on Orbital ATK's Precision Guidance Kit for 155 mm artillery projectiles, XM395 combines GPS guidance and directional control surfaces into a package that replaces standard fuzes, transforming existing 120 mm mortar bodies into precision-guided munitions. [3] The XM395 munition consists of a GPS-guided kit fitted to standard 120 ...

  8. 2S39 Magnolia - Wikipedia

    en.wikipedia.org/wiki/2S39_Magnolia

    2S39 "Magnolia" (Russian: 2С39 «Магнолия»; "Magnolia") is a Russian self-propelled 120 mm mortar system developed for the Russian Armed Forces by Burevestnik. TASS first reported on the project in November 2017. [1] Magnolia developed for units deployed in the Far North. [1][2] It is being built on the basis of the DT-30PM ...

  9. London stock brick - Wikipedia

    en.wikipedia.org/wiki/London_stock_brick

    London stock bricks, rather dimly lit. London stock brick is the type of handmade brick which was used for the majority of building work in London and South East England until the increase in the use of Flettons and other machine-made bricks in the early 20th century. Its distinctive yellow colour is due to the addition of chalk.

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