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The PT Mix was used in both the 10-pound M74 bombs dropped in clusters and the 500-pound M76 bomb in both theaters of the War. The March 9–10, 1945, firebombing of Tokyo, utilizing the M69 bomb, loaded with napalm, killed more than 80,000 people. On May 25–26, 464 Boeing B-29s bombers dropped 3,251 tons of incendiaries on Tokyo.
The mix is prepared on site using a specialized truck. The truck contains a tank for water, a mixing tank, a holding tank, a pump, and a conveyor for the sand and calcined gypsum. A hopper for the sand and gypsum is mounted externally on the vehicle. [8] To prepare the mix, the sand and calcined gypsum are added to the hopper and mixed.
For every mass (kilogram, pound, or any unit of weight) of cement (c), about 0.35 mass of water (w) is needed to fully complete the hydration reactions. [ 1 ] However, a fresh concrete with a w/c ratio of 0.35 may not mix thoroughly, and may not flow well enough to be correctly placed and to fill all the voids in the forms, especially in the ...
Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin , and is usually made from limestone .
The output obtained from a site mix concrete plant using a 8/12 mixer is 4 to 5 metric cubes per hour which is 30-60 metric cubes per hour in a ready mix concrete plant. Better handling and proper mixing practice will help reduce the consumption of cement by 10 – 12%.
Mortar is a mixture with cement and comes from Old French mortier ('builder's mortar, plaster; bowl for mixing') in the late 13th century and Latin mortarium ('mortar'). [7] Lime is a cement [ 8 ] which is a binder or glue that holds things together but cement is usually reserved for Portland cement.
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]
The Hirtenberger M6C-210 is a light mortar with smoothbore barrel, part of the M6 mortar range designed by Hirtenberger Defense Systems of Austria.. This mortar is equipped with two aiming devices and is characterized by high mobility, which should meet the needs of fire during rapid deployment, forward troops or small units such as those engaged in special operations.