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In civil engineering, concrete leveling is a procedure that attempts to correct an uneven concrete surface by altering the foundation that the surface sits upon. It is a cheaper alternative to having replacement concrete poured and is commonly performed at small businesses and private homes as well as at factories, warehouses, airports and on roads, highways and other infrastructure.
Self-leveling concrete was invented in 1952 by Axel Karlsson from Sweden. The first product was a combination of wood glue, fine sand and cement with additives. [1] It was called flytspackel, which directly translates to "floating putty". The term self-leveling can be traced back to a patent applied by the company Lafarge in 1997. [2]
The Concertainer was originally developed by Jimi Heselden, a British entrepreneur and ex-coal miner, who founded HESCO Bastion Ltd. in 1989 to manufacture his invention. [9] Concertainer as the brand name for the barrier is a portmanteau of the words " concertina " and " container ".
Nigeria: 40+ [46] Proforce Viper Light tactical vehicle Nigeria: Proforce Hulk MRAP Nigeria: 5 [47] Otokar Cobra: Light tactical vehicle Turkey: 204 [23] Casspir: MRAP South Africa: 5 [23] Casspir III variant. Reva: MRAP South Africa: 40 [48] Mk III. [49] Plasan Sand Cat: Composite armored vehicle Israel: More units ordered Light armored ...
Abuja, Nigeria's capital city A back view of Civic Towers, Lagos Nigeria is the most heavily populated and one of the most economically developed nations on the African continent. However, the concentration of high-rise buildings and ongoing mega-projects is significantly localized around Lagos , Abuja and Eko Atlantic ; these key marginal ...
A bastion is a structure projecting outward from the curtain wall of a fortification, [1] most commonly angular in shape and positioned at the corners of the fort. The fully developed bastion consists of two faces and two flanks, with fire from the flanks being able to protect the curtain wall and the adjacent bastions. [ 2 ]
The hotel suffered minor damage as a result of the violence, and a couple of street-level windows gave way under the weight of dozens of protesters being pushed up against them by the police. The Drake Hotel was formerly a longtime rival of The Palmer House, before it was acquired by Hilton International in 1980 and operated under its Vista ...
A bastion fort or trace italienne (a phrase derived from non-standard French, meaning 'Italian outline') is a fortification in a style developed during the early modern period in response to the ascendancy of gunpowder weapons such as cannon, which rendered earlier medieval approaches to fortification obsolete.