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Sterilite was founded in 1939 in Fitchburg, Massachusetts as a partnership between Saul and Edward Stone and Earl Tupper, the inventor of Tupperware. The company gained initial business by selling plastic goods to the Armed Forces during World War II. The company later expanded operations to produce toys, storage tools, giftware, and other ...
The first production of concrete pavers in North America was in Canada, in 1973. Due to their success, paving stone manufacturing plants began to open throughout the United States working their way from east to west. [5] The first concrete pavers were shaped just like a brick, 4 by 8 inches (100 mm × 200 mm), and they were called Holland Stones.
The Peavey–Haglin Experimental Concrete Grain Elevator is the world's first known cylindrical concrete grain elevator. It was built from 1899 to 1900 in St. Louis Park, Minnesota, United States, as an experiment to prove the design was viable. It was an improvement on wooden elevators that were continually at risk of catching fire or even ...
By the early part of the 20th century, concrete (and, later, reinforced concrete) vaults became more common. [4] The burial vault was largely unknown until the 1880s when the L.G. Haase Manufacturing Co., which owned a cemetery in Illinois, conceived the burial vault as a means of adding a product line to their funerary sales. [2]
Hemp concrete has a low thermal conductivity, ranging from 0.06 to 0.6 W m −1 K −1, [24] [15] [25] a total porosity of 68–80% [24] [26] and a density of 200 kg /m 3 to 960 kg/m 3. [ 15 ] [ 27 ] Hemp concrete is also an aerated material with high water vapour permeability and its total porosity very close to open porosity allowing it to ...
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