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Historic Preservation - Technical Procedures

Spectitle:

Re-Securing Loose Marble Fragments

Procedure code:

0445521R

Source:

National Capitol Region Specifications

Division:

Masonry

Section:

Marble

Last Modified:

07/30/2013

Details:

Re-Securing Loose Marble Fragments



RESECURING LOOSE MARBLE FRAGMENTS


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on re-securing loose
         marble wall fragments on building exterior or building interior locations.

        The fragments are of a small size and weight for which the adhesive chosen will have sufficient strength to hold the stone securely.

    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

         3.   Submittals

         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).

1.02 PROJECT/SITE CONDITIONS

    A.   Existing Conditions: Review the manufacturer's product literature and follow these instructions.


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Axson North America. Wood & Stone Company.
         www.axson-na.com

2.02 MATERIALS

    A.   Stone: All loose stone in sound condition. Replacement
         marble to be identical in color, texture and type of
         existing marble.

    B.   Adhesives - Stone to Stone Repair: 

        1.For building exterior work, see Axson North America, Wood & Stone Company: Epoxy Stone Adhesives: Akabond 600 Flowing, Akabond              621 KG.  Review product literature carefully in making selection.  Or approved equal.

 

        2. For building interior work, see Axson North Americ, Wood & Stone Company: Polyester Adhesives; review the product range carefully in               making selection. Or approved equal. 
         

    C.   Water: Clean and free of deleterious amounts of oils,
         acids, alkalis and organic matter.

2.03 EQUIPMENT

    A.   Stiff, fiber bristle brushes

    B.   Trowels

    C.   Joint tools

    D.   Wood spatulas


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Carefully remove loose marble fragments. Reuse all pieces
         of marble.

    B.   Clean any exposed metal conduit and anchors of all
         corrosion by scraping and brushing with stiff wire
         brushes. Replace any unsound anchors as necessary with
         new stainless steel anchors of same approximate size and
         shape. Bed new anchors in epoxy grout.

    C.   Clean both building marble and marble fragments of all
         loose debris and grease by brushing with stiff fiber
         bristle brush.

    D.   Coat marble surfaces with adhesive, completely filling
         all voids and covering all surfaces. Set marble while
         adhesive is still tacky, up to 15 minutes. Secure marble
         fragments in place against movement until adhesive has
         cured.

    E.   Clean any residual adhesive from the edges. Wet the
         marble and fill any chipped areas and edges with patching
         mortar. Avoid feather edging. Tool surface level with
         surrounding stone. Keep mortar damp (80-90% RH) for 72
         hours or until cured.

3.02 ADJUSTING/CLEANING

    A.   At the time of repairing, pointing and resetting the
         marble, immediately remove mortar, grout and adhesives
         from the face of the masonry.

    B.   Use only tools and equipment which are clean and free of
         hardened or partially hardened material.

    C.   Clean marble only with fiber bristle brushes and water.
         Use no acids, detergents, or other cleaning agents.

                         END OF SECTION
 


resecurring loose marble fragments