Repairing Hairline Cracks And Small Gouges In Marble
- Procedure code:
- National Capitol Region Specifications - State Department
- Last Modified:
REPAIRING HAIRLINE CRACKS AND SMALL GOUGES IN MARBLE
A. This procedure includes guidance on filling narrow
cracks, holes and gouges in interior marble.
B. See 01100-07-S for general project guidelines to be
reviewed along with this procedure. These guidelines
cover the following sections:
1. Safety Precautions
2. Historic Structures Precautions
4. Quality Assurance
5. Delivery, Storage and Handling
6. Project/Site Conditions
7. Sequencing and Scheduling
8. General Protection (Surface and Surrounding)
These guidelines should be reviewed prior to performing
this procedure and should be followed, when applicable,
along with recommendations from the Regional Historic
Preservation Officer (RHPO).
A. Akemi Plastics, Inc.
B. Eastern Marble & Granite Supply Company
A. Polyester Filler: Knife Grade Polyester-Based Adhesive:
"Akemi Marmorkitt 1000 Platinum" (Akemi Plastic, Inc.,), or "Italian Craftsman Polyester Adhesive" (Eastern Marble & Granite Supply Company), or approved equal.
NOTE: Selected filler should NOT contain materials that
may absorb into the marble and cause staining. Test in
an inconspicuous area.
B. Polishing Compound: An acid-free abrasive compound
containing no caustic or harsh fillers or ingredients
with natural resins added, manufactured specifically for
polishing interior marble surfaces, such as R52B (Eastern
Marble Supply Company), or approved equal.
C. Water: Clean and free of amounts of oils, acids,
alkalies, salts, organic materials, or other substances
that may be deleterious to mortar or any metal in the
A. Hacksaw Blade
C. Hand-held Water Bottle
D. Caulking gun
E. Stiff bristle brushes (non-metallic)
F. Soft, nylon bristle brushes
G. Water feed grinder
3.01 ERECTION, INSTALLATION, APPLICATION
A. Using a chisel or hacksaw blade, carefully remove unsound
marble material and old patching material from cracks and
holes to expose sound marble material for contact with
polyester resin patch.
B. Brush, vacuum or flush cracks and holes to remove dirt
and loose debris.
C. Allow to dry thoroughly.
D. Using a caulking gun or spatula, fill narrow cracks,
holes, and gouges with polyester filler, colored to match
adjacent marble and honed or polished to match marble
finish. Tape around the work area to prevent staining of the marble
during filling operation. Surfaces shall be true and
level. Remove tape residue with appropriate solvent to
produce the specified finish.
E. Allow patching material to cure for period recommended by
F. Grind marble down until an even plane is achieved.
Feather out to unaffected surface as required to avoid
marble having dished appearance. Use right angle water
feed grinder with successively finer diamond disks (#60
to #3500) or silicon carbide grinding stones (36 to 400
G. Polish to match existing sheet of marble. Use acid-free
aluminum oxide polishing compound with felt pad.
CAUTION: USE NO POLISHING COMPOUNDS CONTAINING FLUORIC ACID
AS IT WILL ETCH THE MARBLE SURFACE RESULTING IN A
DIMINUTION OF GLOSS.
END OF SECTION