Method of overlaying sulphur concrete on horizontal and vertical surfaces

A method of placing sulphur concrete against or over an existing relatively smooth surface of portland cement concrete, comprising:

• (a) first applying to said surface a preformed sheet of bituminous material having an outer exposed surface containing bitumen which liquifies at temperatures at which molten sulphur concrete is initially placed;
• (b) pouring a course of molten sulphur concrete mix against or over said bitumen-containing surface, said sulphur concrete being poured at a temperature of from 250.degree. to 290.degree. F., said bitumen liquifying on being contacted by said poured sulphur concrete to form a liquid slip plane in contact with said course;
• and
• (c) setting said layer of bituminous material and said course of sulphur concrete by temperature reduction, whereby said sulphur concrete can shrink during cooling without being restrained by said existing solid surface.

A method of placing sulphur concrete over an existing relatively rough floor surface of portland cement concrete, comprising:

• (a) first applying to said surface a hot asphalt mix to form a relatively smooth surface layer thereon having an upper surface containing bitumen which liquifies at temperatures at which molten sulphur concrete is initially placed;
• (b) pouring a course of molten sulphur concrete mix over said bitumen containing surface, said concrete being poured at a temperature of from 270.degree. to 290.degree. F., said bitumen liquifying on being contacted by said poured sulphur concrete to form a liquid slip plane in contact with said course;
• and
• (c) setting said layer of bituminous material.and said course of sulphur concrete by temperature reduction, whereby said sulphur concrete can shrink during cooling without being restrained by said existing solid surface.

A method of placing a sulphur concrete wall against an existing wall of portland cement concrete having a relatively smooth outer surface, comprising:

• (a) first applying to said surface a layer of a bituminous material to form a bitumen-containing exposed surface thereon, the bitumen in said exposed surface becoming liquified at temperatures at which molten sulphur concrete is initially placed;
• (b) pouring into a form positioned against said wall surface a molten sulphur concrete mix to form a wall with an exposed top portion, the bitumen in said exposed surface melting to form a liquid slip plane in contact with said sulfur concrete;
• and
• (c) setting said layer of bituminous material and said sulphur concrete by temperature reduction while circulating heated air over the top portion of the sulphur concrete wall, whereby said wall can set without cracks or voids.