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Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. [1] [2] Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, tuffaceous sandstone). [3]
In Rome, readily available tuff was often used as an aggregate. [14] Gypsum and quicklime were used as binders. [2] Volcanic dusts, called pozzolana or "pit sand", were favoured where they could be obtained. Pozzolana makes the concrete more resistant to salt water than modern-day concrete. [15] Pozzolanic mortar had a high content of alumina ...
Tuffite should therefore contain more than half volcanic material. If rock contains more than 75% to 90% pyroclastic material, it is referred to as tuff. Some other, mostly older, sources state that tuffite may contain 10% to 50% volcanic material. [4] The adjective tuffitic is used for sediments containing less than 25% volcanic fragments.
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Tuff Shed Incorporated is a manufacturer and installer of storage buildings and garages in the United States. The company currently operates multiple factories in multiple states. The company currently operates multiple factories in multiple states.
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Welcome to the twilight zone of kitchen gadgets, where necessity meets fever-dream invention and somehow creates pure genius. These 20 finds exist in that magical space between "who asked for this?"