Masonry Magazine August 1985 Page. 37
Figure 13
Injected via a tube under pressure into the terra cotta, filling up any voids. The final layer of the resin is given a coloration to match the color of the surface.
If terra cotta is to be replaced, the existing terra cotta block can be cut out using a diamond tipped masonry saw. The edges of the adjoining pieces (to be saved) should be protected using metal shields. In most cases, one piece may need to be sacrificed in order to dismantle the anchors.
Information Needed to Purchase New Terra Cotta
Ludowici-Celadon is one of two national manufacturers of restoration terra cotta as well as terra cotta for new projects. If budget prices or firm prices are required on a restoration project the following is needed:
• Photograph of the piece.
Photograph of the elevation of the building showing location of defective pieces.
• Rough sketch of the piece giving approximate dimensions and quantities.
• Small piece of the glaze.
With this information the manufacturer's estimating department can determine prices and estimate the fabrication time. When the order is processed, the manufacturer would like to have a piece (even if in pieces) of each
Figure 14
separate design. The modelers will use this as their guide in making the oversized model.
Terra cotta meets all applicable tests for an architectural clay product. The specifications covering the material are found in Figure #15. This general specification is applicable whether the terra cotta be for restoration or for a new building, where the material can be used as an embellishment in a brick veneer.
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LUDOWICI-CELADON SPECIFICATIONS FOR ARCHITECTURAL TERRA COTTA
The terra cotta shall be manufactured by the extrusion or repressing process of forming. If the surface has a ceramic glaze, it shall be tested as described in ASTM C-484; the glaze shall show no failure and the body shall show no evidence of disintegration.
When tested as described in ASTM C-67, the terra cotta shall have the following physical properties:
Compressive Strength
9000 psi 5 samples avg.
8000 psi individual
Water absorption.... 5% maximum (5 hours boil)
Saturation
Coefficient
.76 maximum 5 samples avg.
.78 maximum individual
Figure 15
FOR FURTHER INFORMATION WRITE OR CALL TODAY:
KEM-O-KLEEN, INC.
77 EAST FLOYD AVENUE
ENGLEWOOD, COLORADO 80110
(800) 525-8962
DISTRIBUTOR INQUIRIES INVITED
MASONRY-JULY/AUGUST, 1985 37