Asbestos cement

Fiber-Reinforced Cementitious Material. Use of asbestos (qv) has been legally restricted in Europe and the United States as being ha2ardous to health. In asbestos cement, which had consumed 70—80% of total asbestos, PVA fiber has been used in large amount as a replacement for asbestos. PVA fiber has a strength of at least 0.88 N/tex (9 gf/dtex) and can therefore provide the necessary reinforcement for cement the fiber has excellent adhesiveness to cement (qv) and alkaU resistance, and is not a health ha2ard. [Pg.342]

Horizontal corrugated asbestos-cement board endwall casing... [Pg.103]

From the beginning of this century, the demand for asbestos fibers grew in a spectacular fashion for numerous applications, in particular for thermal insulation in steam engines and technologies (4). Moreover, the development of the Hatschek machine in 1900 for the continuous fabrication of sheets from an asbestos—cement composite opened an important field of industrial application for asbestos fibers. [Pg.344]

The reinforcing capacity of asbestos fibers in a cement matrix constitutes another key criteria for the evaluation of asbestos fibers. This property is assessed by preparing samples of asbestos —cement composites which, after a standard curing period, are tested for flexural resistance. The measured mpture modub are converted into a parameter referred to as the fiber strength unit (FSU) (34). [Pg.354]

The reinforcing properties of asbestos fibers have been widely exploited in asbestos—cement products mosdy for the constmction industry and sanitation (sheets, pipes). Into the 1990s, asbestos—cement products represent by fat (f 70%) the largest industrial consumption of asbestos fibers. [Pg.354]

Asbestos cement, 1.2 85% magnesia cement, 0.05 asbestos and rockwool cement, 0.075 approx. "Marks, Mechanical Engineers Handbook, 4tb ed., McGraw-Hill, New York, 1941. [Pg.379]

Asbe.sto.s cement. The normally accepted temperature limits for asbestos cement piping are —18°C (0°F) minimum and 93°C (200°F) maximum. [Pg.948]

Asbestos Cement Asbestos-cement pipe is seamless pipe made of sihca and portland cement, compacted under heavy pressure, uniformly reinforced with asbestos fiber, and thoroughly cured. The interior surface is smooth, does not corrode, and does not tuberculate. Under normal conditions of operation, asbestos cement will handle... [Pg.974]

TABLE 10-37 Asbestos-Cement Gravity Sewer Pipe ... [Pg.975]

Cigarette smoke Pipe lagging Air duct linings Ceiling and roof tiles Asbestos cement sheeting Synthetic fibres Plastics... [Pg.142]

EH 71 Working with asbestos cement and asbestos insulating board... [Pg.574]

Asbestos fiber > 10 micrometer 7 million fibers per liter 7MFL Increased risk of developing benign intestinal polyps Decay of asbestos cement in water mains erosion of natural deposits... [Pg.17]

Asbestos-cement boards or strips Plastic sheet, grids or pieces... [Pg.381]

Corrugated steel or asbestos cement roofing sheets 6.1-6.7... [Pg.404]

Corrugated double-skin asbestos cement sheeting 0.8... [Pg.404]

Steel or asbestos cement roofing sheets, no lining 0.4... [Pg.404]

Steel or asbestos cement cladding with plaster-board 0.4 lining and 100 mm fiber insulating roll Solid brick wall unplastered 105 mm 3.3... [Pg.404]

Any small amount of vapour which might enter through faults in the vapour harrier should he encouraged to pass through the inner (cold side) skin of the structure to the coil, rather than he trapped within the insulation. It follows that, if the vapour harrier is at all suspect, the inner wall coating should he more porous. In traditional construction, this was provided hy an inner lining of cement plaster or asbestos cement sheet, hoth of which transmit vapour. The modern use of impervious materials on hoth skins requires meticulous attention to the sealing of any joints. [Pg.177]

Finally, there was a detonation caused by the interaction of molten calcium with asbestos cement (complex silicate). [Pg.196]

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