C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/36 (2006.01) B28B 7/42 (2006.01) B28B 17/02 (2006.01) B28B 21/14 (2006.01) F16L 9/08 (2006.01)
Patent
CA 2048643
2048643 9010606 PCTABS00002 Acid resistant concrete articles, especially sulphur concrete pipes manufactured from a material formulated on the basis of a composition of portland cement concrete suitable for the manufacture of pipes by means of the dry casting method, the volume of portland cement, filler and water being replaced by a substantially equivalent volume of sulphur cement and filler, while the amount of other components remains substantially unchanged. The sulphur concrete pipes are manufactured by mixing the components of the material and adjusting the mixture to a temperature, where sulphur cement is liquid. At this temperature the mixture is cast while subjected to vigorous vibration, using a casting mould preheated to a temperature of up to 160·C. The cast pipes can be removed from the mould immediately after casting. After only 24 hours they have obtained sufficient strength to be delivered to a building site. Sulphur concrete pipes are most suitable in aggressive environments, since they are resistant to acid and salt attacks.
K. K. K. K. A/s
Macrae & Co.
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