A Hatschek machine for the manufacture of fibre cement sheets is provided, comprising at least three rotatable sieve cylinders which are suitable for rotating in a bath, filled with fibre cement slurry, wherein liquid flows from the slurry through the sieve, and wherein a thin layer of fibre cement remains on the sieve, characterized by the presence of at least two baths, at least two sieve cylinders are rotatably mounted in one and the same bath, and each bath has a separate feed line to supply fibre cement slurry into the bath. Processing Please wait Publication Number Publication Date International Application No. International Filing Date
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Fibre cement is a composite building and construction material, used mainly in roofing and facade products because of its strength and durability. One common use is in fiber cement siding on buildings. The term "cement" originates from the Latin word " Caementum ", which signifies chopped stone. Cement describes a substance which will react chemically with water and develop into a material hard as stone. In fibre cement there is a fibre reinforcement, which contributes to making the fibre-cement material even stronger.
Together with a carefully planned production process, fibre cement makes it possible to develop strong and long lasting construction materials. It is primarily due to its function, performance and commercial value. Fibre cement flat sheet classified, by accredited laboratories, as Category A according to BS EN Fibre-cement flat sheets — Product specification and test methods are sheets which are intended for applications where they may be subject to heat, high moisture and severe frost.
While the best possible Reaction to Fire Classifications are A1 construction applications and A1Fl flooring applications respectively, both of which mean "non-combustible" according to EN , as classified by a notified laboratory in Europe, some fibre cement boards only come with Fire Classification of A2 limited combustibility or even lower classifications, if they are tested at all.
Fibre-reinforced cement-products were invented in the late 19th century by the Austrian Ludwig Hatschek. Originally, the reinforcing fibres were of asbestos and the material was commonly used as siding in house buildings due to its low cost, fire-resistance , water tightness, light weight, and other useful properties.
In the s it became widely acknowledged that exposure to asbestos is harmful to health , being directly related to a number of life-threatening diseases including, asbestosis , pleural mesothelioma lung and peritoneal mesothelioma abdomen. Consequently, asbestos use was progressively prohibited and safer fibre alternatives were developed, principally cellulose , to allow continued exploitation of the widely acknowledged advantages of fibre cement.
Fibre cement products were amongst the last materials available to have contained large quantities of asbestos. The asbestos fibres are intimately bound to the cement matrix and were considered to be immobilized in the cement and therefore less prone to be released in the environment, suspended in the air, and inhaled in the lung than in other materials or applications, such as thermal insulation or flocking , in which loose asbestos fibres were used.
However, asbestos fibres are inevitably released during machining of the fibre-cement products, and by long-term erosion of the material after it has been exposed to atmospheric weathering and wind , which causes the cement to degrade. Occupational health concerns and the protection of workers in the fibre-cement factories have finally led to the progressive elimination of asbestos from these products.
Fibre cement is a main component of long-lasting building materials. The main application areas are roofing and cladding. The list below gives some common applications. Fibre-cement products have found a wide usage in various sectors of construction: industrial, agricultural, domestic and residential buildings, mainly in roofing and cladding applications, for new constructions and refurbishment projects.
From Wikipedia, the free encyclopedia. Archived from the original on Retrieved Home improvement pages. Categories : Asbestos Building materials Cement Composite materials Roofing materials Fibre-reinforced cementitious materials. Hidden categories: Commons category link is on Wikidata. Namespaces Article Talk. Views Read Edit View history. Contribute Help Community portal Recent changes Upload file.
Kind code of ref document : A1. Countries concerned : BAME. Effective date : A Hatschek process for the production of profiled fiber cement plates is provided.
Fibre cement is a composite building and construction material, used mainly in roofing and facade products because of its strength and durability. One common use is in fiber cement siding on buildings. The term "cement" originates from the Latin word " Caementum ", which signifies chopped stone. Cement describes a substance which will react chemically with water and develop into a material hard as stone. In fibre cement there is a fibre reinforcement, which contributes to making the fibre-cement material even stronger. Together with a carefully planned production process, fibre cement makes it possible to develop strong and long lasting construction materials.