Method and plant for the manufacture of building products

Details Method and plant for the manufacture of building products Method and plant for the manufacture of building products

2011-07-19

2011-07-19

Del Sole, Joseph S (Department: 1743)

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

C264S102000, C264S333000

Reexamination Certificate

active

07981335

ABSTRACT:
A plant and method for the manufacture of cementitious products, viz. cast concrete roof tiles (T), the plant comprising a mixing station (2) where the constituents of a cementitious composition, less an air entraining agent, are admixed under atmospheric pressure and further mixed under a partial vacuum of 200 to 340 mBar after the addition of an air entraining agent, the plant also comprising a molding station (4) where the tiles (T) are cast in a gang-mold (6) before being cured in a conventional autoclave for up to 10 hours at 45 degrees C. The cured concrete roof tiles (T) are de-molded after curing and conveyed to a surface preparation zone (12) where a primer coat of a water based epoxy and a surface coating of a water based emulsion paint are applied to at least an upper surface in use of the cast concrete roof tiles (T). The admixed cementitious composition has a Ford Cup flow of between 40 and 60 seconds and a slump test of between 180 and 220 mm. In an alternative method, instead of applying a primer coat, the upper surfaces, in use, of the roof tiles T are subjected to abrasion by grit-blasting to remove a thin layer from the upper surfaces thereby facilitating the subsequent application thereto of a surface coating.

REFERENCES:
patent: 4875937 (1989-10-01), Viles
patent: 5595698 (1997-01-01), Nicholas et al.
patent: 2001/0007711 (2001-07-01), Schwartz et al.
patent: 2002/0009622 (2002-01-01), Goodson
patent: 2004/0208079 (2004-10-01), Hein
patent: 2006/0178463 (2006-08-01), Sacks
patent: 2 201 104 (1988-08-01), None
patent: 6-1679 (1994-01-01), None
patent: 8-67580 (1996-03-01), None
International Search Report issued Aug. 2, 2006.

Affiliated with

Also associated with

Rating

Method and plant for the manufacture of building products does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and plant for the manufacture of building products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and plant for the manufacture of building products will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2710473