Specifications For Pointing and Sealing of Stone Work George Rogers Clark State Memorial
A. General Conditions:
All work shall be done subject to the Instructions to Bidders. Information for Bidders and the General Conditions, and the Contractor is notified to refer thereto and will be held responsible for all requirements made therein that affect his work.
B. Description of the Project:
This project consists of repairs to the exterior stone work and repairs to certain paved surfaces of the George Rogers Clark State Memorial, the east approach to the bridge over the Wabash River located just north of the Memorial and the Francis Vigo Monument located directly west of the Memorial Building, all located in the City of Vincennes, Indiana.
For the convenience of future reference the project is divided into the following areas:
Area 1. All the work hereinafter detailed and located within the paved promenade which encircles and includes the Memorial Building proper.
Area 2. All stone walls, curbs, the paved promenade and the steps which lead up to the promenade. This includes all curbs and walls surrounding the planting areas.
Area 3. The entire east approach to the bridge including all walls, steps, the flagpole base, and the pylons on both sides of the highway.
Area 4. The Francis Vigo Monument, including all stone work in the statue, steps and walls and the two sets of steps at the rail road tracks.
C. Scope of Work:
1. The Contractor shall furnish all labor, material, services and equipment to complete all tuck pointing, filling and sealing of top-surface stone joints, caulking the perimeter of all openings in the stone work, such as doors and windows, repairs to the expansion joints and the paved surface of the promenade as it applies to the areas described above, as shown on the drawing and as hereinafter specified.
2. Storage space, use of power and water must be mutually ar ranged between the Owner and the Contractor.
3. Weather protection shall be maintained at all times. Damage by freezing, rain or frost shall be just cause for rejection of the work.
4. Protection of Shrubbery: The Contractor shall take precautions to protect all shrubbery and other planting from damage during the course of the work. Shrubbery shall be tied back or otherwise protected as required and no shrubbery may be trimmed or removed without the permission of the Engineer.
D. Tuckpointed and Sealed Joints:
1. All stone joints in all areas shall be either tuck-pointed with non-staining mortar or filled with mortar and then sealed with a synthetic rubber caulking compound as hereinafter described except as follows:
No work shall be done to the stone work of the main building from the top of the polished granite base up to a height equal to the tops of the granite columns. No work shall be done to the fluted, granite columns.
2. Preparation of Surfaces:
All mortar in the masonry shall be removed to the depth of 3/4" for joints to be tuck-pointed and 1" for joints to be filled and sealed or as much deeper as may be necessary to reach sound backing. Joints shall be cut with square edges so that the entire width of the joint is cut out to the required depth. Extreme care shall be taken so as not to damage the edges and corners of the stone. All cut joints shall be thoroughly cleaned of loose particles and dust by means of brushes or compressed air, then washed clean with a hose and clean water. Joints shall be damp when mortar is applied.
3. Sealed Joints:
In general, all joints in the exposed top surfaces of stone work (including steps) and the continuation of such joints down to the first horizontal joint shall be filled to within 1/4" of the face of the stone with mortar and the remainder of the joint filled flush with the stone with a synthetic rubber sealing compound. All joints in stone steps shall be sealed.
4. Tuck-pointed Joints:
All joints in stone work which are not sealed, except as noted above under D-1 shall be tuck-pointed.
5. Method and Workmanship:
a. Sealed Joints: Joints to be filled shall be clean and dampened with clean water.
Mortar shall be forced into the cut-out joints with a heavy convex jointer completely sealing the space to within 1/4" of the face of the stone. After the initial set of the mortar has taken place surplus mortar shall be removed from the edges of the joints by means of a soft brush. When the mortar has set and all surfaces are dry, free of oil, grease, dirt and loose particles, the joint is ready to be sealed. To protect exposed face of stone against sealing compound, line sides with Scotch Brand #202 Masking Tape to within about 1/16" of edge of joint. Tape to be stripped off after Sealing Compound is in place. Immediately before applying Sealing Compound, wipe down surfaces to be filled with clean rags soaked in either zylol, toluol, high flash naphtha or lacquer solvents. Wipe surface dry with clean rags.
Apply Sealing Compound with proper tools filling the joint flush with the stone. Level as required with a steel pointing tool of desired width.
For Wide Joints: Wide joints may be filled by a bead on each side followed by one in the center and then finished.
Sealing Compound shall be mixed, handled and applied in accordance with the manufacturer s explicit instructions by workmen who are thoroughly familiar with the material and experienced in its application.
b. Tuck-pointing Joints: Joints to be filled shall be clean and dampened with clean water. Where cleaned joint is more than 3/4" deep, fill joint to within 3/4" of the face of the stone with prepared masonry mortar prepared with ordinary clean masonry sand. After this mortar has taken its initial set, fill the remainder of the joint with a prepared, waterproof, non-staining mortar prepared with white silica sand. Color mortar to match existing mortar joints. Mortar shall be applied with a heavy convex "jointer" completely sealing the space between masonry and backup mortar. A convex "jointer" that is slightly wider than the joint to be filled shall be used to force the mortar back into the joint. Enough mortar will be put into these joints so that a slight surplus will be in evidence at the top and bottom of the "jointer." After the initial set of the mortar has taken place, all surfaces are to be brushed down with a soft brush to remove any existing fins. Finished joints shall match existing joints and be of uniform texture and color.
a. Masonry Cement shall be prepared waterproof non-staining cement such as "Brixment," "Richmortar," "Cosmortar" or any equal approved by the Engineer.
b. Mortar Sand for mortar fill shall be washed sand entirely free from loam, silt, salts, vegetable matter, and all other injurious substances. When dry, sand shall pass a No. 8 sieve and not more than 35% shall pass a No. 50 sieve. It shall be well graded within these maximum and minimum limits.
c. Silica Sand for pointing mortar shall be fine, clean, pure silica sand.
d. Water shall be clean, clear water suitable for drinking.
e. Sealing Compound shall be a synthetic rubber Thiokol based compound, such as "Sonolastic Sealing Compound" as made by L. Sonneborn Sons, Inc., Presstite Sealing Compound No. 1175.2 as made by Presstite-Keystone Co., St. Louis, Mo., "Synthacalk" as made by Pecora Paint Co., Inc., or an equal approved by the Engineer. Color to be gray matching the stone work as closely as possible. Color must be approved by the Engineer before any material is applied to the building.
1. This section of the work consists of the caulking of the perimeter of all exterior doors and windows and other openings or protrusions of the Memorial.
2. Preparation of Surfaces:
Joints between masonry and opening shall be raked out and brushed clean. Where spaces around openings are of greater depth than 3/4" they shall be packed with untreated oakum to this depth.
Openings shall be caulked tight with approved caulking compound, applied by gun and dressed down and free from fins or overlaps. All caulking shall be performed strictly in accordance with the manufacturer's directions and shall be guaranteed for a period of three (3) years.
Caulking compound shall be non-staining elastic compound of gun consistency, color to match stone. Caulking compound shall be guaranteed to conform to Federal Specification TT-C-598. Caulking Compound shall be "Vulcatex" as manufactured by A. C. Horn Companies; "Kaukit" as manufactured by L. Sonneborn Sons, Inc., "Caulk-O-Seal" manufactured by Calbar Paint and Varnish Co., Philadelphia, Pa., or an approved equal.
F. Repairs to Promenade: (Area #2)
1. This section of the work includes the re-sealing of the expansion joints of the black-topped promenade around the entire circular part of the building. Also included is the sealing of the surface of the promenade. All work to be done as shown on the drawing and as hereinafter specified.
2. Preparation of Surfaces:
Cut to a straight line and remove a strip of the surfacing material 6 inches wide on each side of the expansion joint down to the concrete fill slab. Remove old expansion joint material down to a depth of approximately 1-1/2 inches below the top of the fill slab. Thoroughly clean joint opening and walls forming the joint to insure proper seal of new expansion joint material.
3. Method and Workmanship:
Pack expansion joints to within 3/4 inch of the top of the fill slab with alternate layers of untreated oakum and caulking compound packed into place. After this is done, fill joint to top with hot-poured rubberized asphalt joint sealing compound. Over the expansion joint and where the 12 inch wide strip of surfacing was previously removed, place one layer of waterproofing membrane.
Over the membrane fill the 12 inch wide strip flush with the existing black top surface with a trowel applied latex composition waterproof covering.
When all joints have been repaired as outlined above, mop entire promenade with 2 coats of coal tar pitch sealer. Repairs to expansion joints and mopping of the promenade shall be done carefully by workmen experienced in this type of work. All surfaces must be clean and dry before new materials are applied. All work shall be done and all materials shall be applied strictly in accordance with the instructions of the manufacturer of the material used.
a. Oakum rope shall be free from tar, oil or other foreign materials.
b. Rubberized asphalt expansion joint sealing compound shall be hot-poured "Para-Plastic" as made by Servicised Products Corp., 6051 W. 65th Street, Chicago, Ill., or equal approved by the Engineer. Product must meet Federal Specifications SS S-164 (1), and ASTM Specifications D-1190-52T.
c. Woven Waterproof Membrane shall be "Glasfab" as made by Twinsburg-Miller Corp., Thinsburg, Ohio, or an equal approved by the Engineer.
d. Latex composition waterproof covering used to level surface ever the membrane shall be "Dex-O-Tex" "Neotex" trowel-type composition flooring as made by Crossfield Products Corp., Chicago, Ill., or an equal approved by the Engineer.
e. Coal tar pitch sealer for coating the entire promenade shall be Jennite J-16 as made by Maintenance Inc., Wooster, Ohio or an equal approved by the Engineer.
The Contractor shall provide a standard guarantee that if at any time within two years from the date of acceptance of the work by the Owner any leaks shall develop in the surfaces treated, due to defective work or the use of improper materials and workmanship, then the Contractor will, upon request, promptly make repairs at his own expense. Defects in the structure or other caused beyond the control of the Contractor, resulting in fracture, shall not be covered by this guarantee.
Last Updated: 17-Sep-2001