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When water is mixed with portland cement, the product sets in a few hours and hardens over a period of weeks. These processes can vary widely, depending upon the mix used and the conditions of curing of the product, [18] but a typical concrete sets in about 6 hours and develops a compressive strength of 8 MPa in 24 hours. The strength rises to ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 12 February 2025. American multinational home improvement supplies retailing company The Home Depot, Inc. A Home Depot in Onalaska, Wisconsin Company type Public Traded as NYSE: HD DJIA component S&P 100 component S&P 500 component Industry Retail (home improvement) Founded February 6, 1978 ; 47 years ...
Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures to a solid over time. Concrete is the second-most-used substance in the world after water, [1] and is the most widely used building material. [2] Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. [3]
[2] Some types of concrete used to make garden sculptures and planters have been called composition stone or composite stone. There is no single precise formula that differentiates composition stone from other lime-cemented concretes, which is unsurprising because the term predates modern chemical science, being attested since at latest the 1790s.
[1] [2] Scharnhorst and Gneisenau also carried four single MPL C/35 mounts that weighed 26.71 tonnes (26.29 long tons; 29.44 short tons) with armor between 6–2 cm (2.36–0.79 in) thick. Each mount could depress -10° and elevate to 35°; this gave a maximum range of 22,000 metres (24,000 yd).
The 21 cm Gr 39 Be was a Czech-designed anti-concrete shell fitted with a base fuze, a ballistic cap and the additive sleeve. It was filled with 8.1 kilograms (18 lb) of TNT. There was also an armor-piercing, base-fuzed shell, the 21 cm Pzgr 39 of which little is known other than it had a filling of 2.8 kilograms (6.2 lb) of a PETN/wax mixture. [2]
A sIG 33 auf Panzerkampfwagen I in Greece in 1941. 36 vehicles were organized into independent schwere Infanteriegeschütz-Kompanie (mot.S.) ("self-propelled heavy infantry gun companies") numbers 701–706, assigned to Panzer divisions in the Battle of France [2] as follows: [3]
15 cm sFH 18/43 – a sFH 18 development to accept bag charge with sliding-block breech; 15 cm sFH 18/32L – Chinese (Republic of China) version with longer barrel and longer range of 15 km; 152 mm houfnice vz.18/47 – Post-war Czech modification with a shorter barrel that was rebored to 152 mm, and a double-baffle muzzle brake.