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Bags have been used as standard measures for a variety of commodities which were actually supplied in bags or sacks. These include: Cement is commonly sold in bags of 94 pounds weight, because this is about 1 cubic foot of powdered cement. [1] Agricultural produce in England was sold in bags which varied in capacity depending on the place and ...
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 .
[citation needed] In the concrete and petroleum industry, however, a bag of cement is defined as 94 lb (43 kg) because it has an apparent volume close to 1 cubic foot (28 litres). [61] When ready-mix concrete is specified, a "bag mix" unit is used as if the batching company mixes 5 literal bags of cement per cubic yard (or cubic metre) when a ...
Of the various ingredients used to produce a given quantity of concrete, the cement is the most energetically expensive. Even complex and efficient kilns require 3.3 to 3.6 gigajoules of energy to produce a ton of clinker and then grind it into cement. Many kilns can be fueled with difficult-to-dispose-of wastes, the most common being used tires.
A further benefit is that nails can be driven through the cement into the subfloor without it chipping. [8] The cost of gypsum concrete is comparable to regular concrete, ranging from $1.75 per square foot to $6.00 per square foot. [12] Regular concrete ranges from $2.50 to $4.50 per square foot. [13]
Cement board is composed of aggregated Portland cement with a glass-fiber mesh on the surfaces. This 5 ⁄ 16 inch (7.9 mm) thick cement board is designed as an underlayment for tile floors. These are 3-by-5-foot (91 by 152 cm) sheets.
The main factors influencing temperature variation in the mass concrete structure are: the size of the structure, the ambient temperature, the initial temperature of the concrete at the time of placement and curing program, the cement type, and the cement contents in the mix. Mass concrete structures include massive mat foundations, dams, and ...
This is equal to 34,560 pounds of lifting force per square foot. With Portland cement added, this can increase to over 6,000 psi [5] or 864,000 pounds per square foot. Once the slurry dries it creates a near-solid stone foundation for the leveled concrete (much like the original stone base the concrete was poured upon.)
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