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Structural concrete can also be used for flat roof constructions. There are three main categories, precast/prestressed, cast-in-place and shell. There are many types of precast/prestressed concrete roofing. The following are the most common types. [9] Double tees are the most common products for short spans up to 60 feet (18 m)
It can also be found in insulation, siding, roof gutters, and cement wallboard. The more prevalent transite found in wall construction and roofing tiles for example, will last anywhere from 50 years to over 100 years. [citation needed] The use of asbestos, a proven carcinogen, to manufacture transite was phased out in the 1980s.
Front cover of a brochure for Hatscheks Eternit Schiefer (asbestos cement roof tiles) Fibre-reinforced cement products were invented in the late 19th century by the Austrian Ludwig Hatschek . Principally he mixed 90% Portland cement and 10% asbestos fibres with water and ran it through a cardboard machine.
It owns 50 production units of cement, mortar, lime, limestone and aggregate and 90 concrete centers in Brazil, and 6 production units of cement, 198 production units of aggregates and concrete centers in North America with a total capacity of 31.8 million tons/year of cement, 7.8 million m³/year of concrete, and 23.0 million tons/year of ...
The main ingredients of a concrete roof tile are sand, concrete, water and colour pigments on an iron oxide basis. From the beginning, Braas gave a 30-year-guarantee on the materials of the "Frankfurter Pfanne" and was thus the first manufacturer in Germany to give long-term guarantees on building materials. [ 19 ]
Asbestos cement, genericized as fibro, fibrolite (short for "fibrous (or fibre) cement sheet"; but different from the natural mineral fibrolite), or AC sheet, is a composite building material consisting of cement and asbestos fibres pressed into thin rigid sheets and other shapes.
It is created by using small lightweight EPS balls (sometimes called Styrofoam) as an aggregate instead of the crushed stone that is used in regular concrete. [3] It is not as strong as stone-based concrete mixes, but has other advantages such as increased thermal and sound insulation properties, easy shaping and ability to be formed by hand ...
Roof tiles are overlapping tiles designed mainly to keep out precipitation such as rain or snow, and are traditionally made from locally available materials such as clay or slate. Later tiles have been made from materials such as concrete , glass , and plastic .
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