ST. VINCENT COLLEGE
SIS AND HERMAN DUPRÉ SCIENCE PAVILION
SECTION 04 01 20 - CLAY MASONRY RESTORATION AND CLEANING – ADDENDUM NO.6
PART 1 - GENERAL
1.01
RELATED DOCUMENTS
A.
1.02
Drawings and general provisions of the Contract, including General
and Supplementary Conditions and Division 1 Specification
Sections, apply to this Section.
SECTION SUMMARY
A.
Section includes:
1.
2.
3.
4.
1.03
Building survey.
Preparation.
Cleaning of all masonry, interior and exterior.
Repairs after selective demolition, cleaning of masonry
exposed after selective demolition.
RELATED SECTIONS
A.
Related Sections include:
1.
2.
1.04
Section 03 01 00 - Concrete Restoration
Section 07 92 00 - Joint Sealants
SUBMITTALS
A.
Product data for each product indicated including recommendations
for their application and use. Include test reports and
certifications substantiating that products comply with
requirements.
B.
Samples for verification purposes, prior to erecting the mockup,
of the following:
1.
Each new exposed masonry material to be used for replacing
existing materials. Include in each set of samples the full
range of colors and textures to be expected in the completed
work.
2.
Each type of chemical cleaning material.
C.
Qualification data for firms and persons specified in the "Quality
Assurance" Article to demonstrate their capabilities and
experience. Include a list of completed projects with project
names, addresses, names of Architects and Owners, and other
information specified.
D.
Restoration program for each phase of the restoration process,
including protection of surrounding materials on building and site
during operations. Described in detail the materials, methods,
and equipment to be used for each phase of the restoration work.
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1.
E.
1.06
If alternative methods and materials to those indicated are
proposed for any phase of restoration work, provide a written
description, including evidence of successful use on other
comparable projects, and a testing program to demonstrate
their effectiveness for this project.
Cleaning program indicating cleaning process, including protection
of surrounding materials on building and site, and control of
runoff during operations. Describe in detail the materials,
methods and equipment to be used.
QUALITY ASSURANCE
A.
B.
Restoration Specialist: Engage an experienced masonry restoration
and cleaning firm that has specialized in the types of work
required for this project. At Contractor's option, the work may
be divided between two separate firms; one for cleaning and one
for repair work.
1.
Work must be performed by a firm having not less than 5 years
successful experience in comparable masonry restoration
projects and employing personnel skilled in the restoration
processes and operations indicated.
2.
Field Supervision: Require restoration specialist firm to
maintain an experienced full-time supervisor on the job site
during times that clay masonry restoration and cleaning are
in progress.
Field-Construction Mockups: Prior to starting masonry
restoration, prepare the following sample panels on the building
where directed by Architect. Prepare sample panels using same
materials and methods proposed for the work, and under same
weather conditions to be expected during the restoration. Obtain
Architect's acceptance of visual qualities before proceeding with
masonry restoration. Retain acceptable panels in an undisturbed
condition, suitably marked, during construction as a standard for
judging the completed work.
1.
Notify Architect one week in advance of dates and times when
sample panels will be prepared. Prepare a minimum of three
panels showing various cleaning applications.
2.
Cleaning: Demonstrate the materials and methods to be used
for cleaning each type of masonry surface and condition on
sample panels approximately 25 sq. ft. (2.3m2) in area.
a.
Test materials and methods on samples of adjacent
nonmasonry materials for possible reaction with cleaning
materials, except where materials and methods are known
to have a deleterious effect on such materials.
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3.
1.07
Masonry Repair: Prepare sample panels of size indicated for
each type of masonry material indicated to be patched,
rebuilt or replaced. Erect mock-up panels into an existing
wall, unless otherwise indicated, to demonstrate quality of
materials and workmanship.
PROJECT/SITE CONDITIONS
A.
Protect persons, motor vehicles, surrounding surfaces of building
whose masonry surfaces are being restored, building site, and
surrounding buildings from injury resulting from masonry
restoration work. Erect temporary protection covers as requires.
B.
Do not clean masonry, or repair masonry unless air temperatures
are between 40 degrees F (4 degrees C) and 80 degrees F (27
degrees C) and will remain so for as least 48 hours after
completion of work. When temperature falls below 32 degrees F (0
degrees C), provide a temporary enclosure work area, day and
night; provide temporary heat.
C.
Hot weather requirements: protect restoration work when
temperature and humidity conditions produce excessive evaporation
of water from mortar and patching materials. Provide artificial
shade and wind breaks and use cooled materials as required. Do not
apply mortar to substrates with temperatures of 90 deg F
(32 deg C) and above.
D.
Prevent grout or mortar used in repointing and repair work from
staining face of surrounding masonry and other surfaces. Remove
immediately grout and mortar in contact with exposed masonry and
other surfaces.
E.
Protect sills, ledges and projections from mortar droppings.
F.
Contractor shall be responsible for field verifying hardness of
existing mortar joints prior to submitting bid.
1.08
SEQUENCING/SCHEDULING
A.
Perform masonry restoration work in the following sequence:
1.
2.
3.
4.
Preparation.
Cleaning.
Patching and Repairs.
Final cleaning.
PART 2 - PRODUCTS
2.01
MASONRY MATERIALS
A.
Face Brick and Accessories: Provide face brick and accessories,
with color, surface texture, and physical properties to match
existing face brick or blend of brick. Face brick shall conform
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to ASTM C 216, Type SW, Grade A.
2.02
MORTAR MATERIALS FOR PATCHING AND REPAIRS; PORTLAND CEMENT LIME
MORTAR
A.
Portland Cement:
cement.
B.
Hydrated Lime:
C.
Aggregate for Mortar:
Low-Alkali, nonstaining
ASTM C 207, Type S.
ASTM C 144, unless otherwise indicated.
1.
For pointing mortar, provide sand with rounded edges.
2.
Match size, texture and gradation of existing mortar
aggregate as closely as possible.
D.
Water:
E.
Colored Mortar:
1.
b.
2.
As follows:
When attempting to match existing mortar, the Contractor
shall submit to a testing laboratory, a sample of the
existing mortar to determine it’s contents.
Upon determination of the contents of the existing
mortar, the Contractor will produce a wall mock-up using
the formula for the existing mortar to create new mortar.
The Architect will then review the mock-up for approval.
Colored Portland Cement-Lime Mix.
a.
b.
c.
3.
Clean, free of oils, acids, alkaline and organic matter.
Match existing mortar color, after cleaning.
a.
The Riverton Corporation "Riverton Portland Cement Lime
Custom Color."
Glen-Glenn-Gery Corporation "Color Mortar Blend."
Lehigh Portland Cement Co. "Lehigh Custom Color
Portland/Lime."
Mortar Pigments
a.
b.
2.03
ASTM C 150, Type I.
Davis Colors "True Tone Mortar Colors."
Solomon Grind-Chem Services, Inc. "SGS Mortar Colors."
CLEANING MATERIALS AND EQUIPMENT
A.
Water for Cleaning: Clean, potable, free of oils, acids, alkalis,
salts, and organic matter.
B.
Warm Water: Heat water to a temperature of 140 to 180 degrees F
(60 degrees C to 82 degrees C).
C.
Brushes:
Fiber bristle only.
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D.
Job-Mixed Detergent Solution: Solution prepared by mixing 3 oz.
(85g) of trisodium phosphate (TSP), 1 oz. (28g)of laundry
detergent (Tide, All, etc.), 1 quart (.946l) of 5 percent sodium
hypochlorite (bleach), and 3 quarts (2.8l)of warm water for each
gallon of solution required.
E.
Masonry Cleaner
1.
Citrus-Based bio-degradable V.O.C. compliant emulsified
cleaner/stripper.
a.
b.
E.
If Citrus based cleaner does not produce satisfactory results
through test samples as determined by the Architect, a stronger
cleaning solution shall be used. Acidic Cleaner: Manufacturer's
standard-strength acidic masonry restoration cleaner composed of
hydrofluoric acid blended with other acids, including a trace of
phosphoric acid, and combined with special wetting systems and
inhibitors.
1.
2.
3.
F.
Diedrich Technologies, Inc.; "101 Masonry Restorer" and "101G
Granite, Terra-Cotta and Brick", Oak Creek, WI,
www.diedrichtechnologies.com
(800)-323-3565.
Pro So Co., Inc.; "Sure Klean Restoration Cleaner", Kansas
City, KS, www.prosoco.com (913)-281-2700.
Hydrochemical Technologies, Inc.; "Hydroclean HT-626",
Hartford, CT, www.hydroclean.com (800)-278-7681.
Chemical Paint Remover: Manufacturer's standard
thixotropic/alkaline formulation for removing paint coatings from
masonry.
1.
2.
3.
G.
Manufacturer: Conspec "Orange Peel," 1-800-348-7351.
Approved equal.
Diedrich Technologies, Inc.; "606 Multi-Layer/606X Extra
Thick Paint Remover with pull off removal system", Oak Creek,
WI, www.diedrichtechnologies.com
(800)-323-3565.
Pro So Co., Inc.; "EnvironKlean Safety Peel 1 or 3 with
Envirno Klean overcoat", Kansas City, KS, www.prosoco.com
(913)-281-2700.
Hydrochemical Technologies, Inc.; "Hydroclean HT-300."
Hartford, CT, www.hydroclean.com (800)-278-7681.
Liquid Strippable Masking Agent: Manufacturer's standard liquid,
film-forming, strippable masking material for protecting glass,
metal, and polished stone surfaces from the damaging effects of
acidic and alkaline masonry cleaners.
1.
2.
3.
ABR Products, Inc. “Rubber Mask”, Franklin, WI, www.abrp.com
(800)-346-7532.
Diedrich Technologies, Inc.; "Diedrich Acid Guard", Oak
Creek, WI, www.diedrichtechnologies.com
(800)-323-3565.
ProSoCo, Inc.; "Sure Klean Strippable Masking", Kansas City,
KS, www.prosoco.com (913)-281-2700.
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H.
2.05
Spray Equipment: Provide equipment for controlled spray
application of water and chemical cleaners, if any, at rates
indicated for pressure, measured at spray tip, and for volume.
Adjust pressure and volume, as required, to ensure that damage to
masonry does not result from cleaning methods.
JOINT SEALANT
A.
2.06
Refer to Section 07 92 00 - Joint Sealants.
MORTAR MIXES
A.
Measurement and Mixing: Measure cementitious and aggregate
material in a dry condition by volume or equivalent weight. do
not measure by shovel; use known measure. Mix materials in a
clean mechanical batch mixer.
B.
Mixing Pointing Mortar: Thoroughly mix cementitious and aggregate
materials together before adding any water. Then mix again,
adding only enough water to produce a damp, unworkable mix which
will retain its form when pressed into a ball. Maintain mortar in
this dampened condition for 1 to 2 hours. Add remaining water in
small portions until mortar of desired consistency is reached.
Use mortar within 30 minutes of final mixing; do not retemper or
use partially hardened material.
1.
Pointing Mortar: One part Portland cement, one part lime and
six parts mortar aggregate. Comply with ASTM C 270,
Proportion Specification, Type N, 750 P.S.I.
2.
Rebuilding Mortar:
Specification.
a.
b.
2.07
Comply with ASTM C 270, Proportion
Above Grade Mortar:
Below Grade Mortar:
Type "N"
Type "M"
MISCELLANEOUS MATERIALS
A.
Horizontal joint reinforcing, anchors and wall ties for patching
and repair work.
1.
Manufacturers
a.
b.
c.
d.
2.
Dur-O-Wall
Southern Construction Products, Inc.
Southern Wire
Wire Bond
Characteristics:
a.
Wire Sizes: Fabricate with 9-gage(0.148inch)(3.5mm)
side and cross rods, containing a minimum of 90%
recycled material, 75% post-consumer steel, ASTM A 82,
unless otherwise indicated.
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B.
b.
Wire Finish: Provide manufacturer's standard mill
galvanized finish for interior walls. For exterior
walls hot-dip galvanize joint reinforcing after
fabrication to comply with ASTM A 153, Class B-2
coating.
c.
Brick Veneer/CMU adjustable ties: Horizontal joint
reinforcing with adjustable ties, containing a minimum
of 90% recycled material, 75% post-consumer steel.
Required where face brick coursing does not match CMU
coursing.
Injection Grout:
1.
Cement based grout for cracks.
Cathedral Stone Company, Inc.; "Jahn Injection Grout M30, M40
and M50".
PART 3 - EXECUTION
3.01
GENERAL
A.
3.02
Clay masonry restoration and cleaning materials shall be installed
in strict accordance with the manufacturer's current, printed
instructions.
BUILDING SURVEY
A.
3.03
Contractor shall survey masonry and joints in detail to determine
repair and patch work necessary for restoration of clay masonry.
PREPARATION
A.
Comply with recommendations of manufacturers of organic cleaners
and repellents for protecting building surfaces against damage
from exposure to their products.
B.
Protect persons, motor vehicles, surrounding surfaces of building
whose masonry surfaces are restored, building site, and
surrounding buildings from injury resulting from masonry
restoration work.
1.
Prevent organic cleaning solutions and repellents from coming
into contact with pedestrians, motor vehicles, landscaping,
buildings and other surfaces which could be injured by such
contact.
2.
Do not clean masonry during winds of sufficient force to
spread cleaning or repellent solutions to unprotected
surfaces.
3.
Dispose of run-off from cleaning and repellent operations by
legal means and in manner which prevents soil erosion,
undermining of paving and foundations, damage to landscaping,
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and water penetration into building interiors.
3.04
4.
Erect temporary protection covers over pedestrian walkways
and at points of entrance and exit for persons and vehicles
which must remain in operations during course of masonry
restoration work.
5.
Protect adjacent surfaces from contact with organic cleaners
by covering them with a liquid strippable masking agent or
polyethylene film and waterproof masking tape. Apply masking
agent to comply with manufacturer's recommendations. Do not
apply liquid masking agent to painted or porous surfaces.
CLEANING MASONRY, GENERAL
A.
Clean clay masonry throughout the building, both interior and
exterior.
1.
Remove paint droppings from clay masonry walls.
B.
Proceed with cleaning in an orderly manner.
top of the building for each scaffold drop.
C.
Perform each cleaning method indicated in a manner that results in
uniform coverage of all surfaces, including corners, moldings, and
interstices, and that produces an even effect without streaking or
damaging masonry surfaces.
1.
D.
Work from bottom to
Rinse off cleaning residue and soil by working upwards from
bottom to top of each treated area at each stage on scaffold
setting.
Water Spray Pressure:
Comply with the following requirements:
1.
Low-Pressure Spray: 100 to 400 psi (690 to 2750 kPa), 3 to 6
gal. per minute (0.25 to 0.4L/s).
2.
Medium-Pressure Spray: 400 to 800 psi (2750 to 5500kPa), 3
to 6 gal. per minute (0.25 to 0.4L/s).
3.
High-Pressure Spray: 800 to 1200 psi (5500 to 8250kPa), 3 to
6 gal.per minute (0.25 to 0.4L/s).
E.
Organic Cleaner Application Methods: Comply with chemical
manufacturer's recommendations using brush or spray application.
Do not spray-apply at pressure exceeding 50 psi. Do not apply
more than twice.
F.
Detergent Cleaning:
follows:
Clean masonry with a detergent solution as
1.
Wet masonry with cold water applied by low-pressure spray.
2.
Scrub masonry with detergent solution using medium-soft
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brushes until soil is thoroughly dislodged and can be removed
by rinsing.
3.
G.
3.05
Rinse masonry with cold water applied by medium-pressure
spray.
Organic Cleaning: Clean brick masonry surfaces with indicated
chemical cleaner applied as follows:
1.
Wet masonry with cold water applied by low-pressure spray.
2.
Apply organic cleaner to masonry. Let cleaner remain on
surface for the period recommended by manufacturer before
rinsing away.
3.
Rinse masonry with cold water applied by medium-pressure
spray.
PATCHING
A.
Patching and repair of miscellaneous cracks in existing masonry.
B.
Face Brick: Facade Cracks:
indicated.
As follows, unless otherwise
Crack Size (Width)
Procedure
1/64" (.39mm) or less
Repoint cracked mortar
joints.
No brick repair or
replacement required.
1/64" (.39mm) to 1/8"(3.0mm)
Repoint cracked mortar
joints.
Pressure inject grout
into brick crack or
replace face brick.
1/8" (3.0mm) or larger
Repoint mortar joint.
Replace face brick
with cracks 1/8" or
more in width.
3.09
FINAL CLEANING
A.
After mortar has fully hardened thoroughly clean exposed masonry
surfaces of excess mortar and foreign matter using stiff nylon or
bristly brushes and clean water, spray applied at low pressure.
B.
Use of metal scrapers or brushes will not be permitted.
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C.
3.10
Exposed clay masonry surfaces shall be cleaned free of atmospheric
dirt, mildew and carbon formation to restore the surfaces to their
original appearance.
APPLICATION OF JOINT SEALANT
A.
Refer to Section 07 92 00 - Joint Sealants.
B.
Replace deteriorated sealant cracked sealant, missing sealant, and
sealant not bonded to adjacent surfaces.
3.11
WASTE MANAGEMENT
A.
Separate and recycle waste materials in accordance with the Waste
Management Plan and to the maximum extent economically feasible.
B.
Fold up packing materials and place in designated area for
recycling.
C.
Collect wood packing shims and pallets and place in designated
area.
D.
Place unused mixed mortar in designated locations where lowerstrength mortar meets the requirements for bulk fill; for example,
use as retaining wall footing ballast, cavity fill at grade, or
underground utility pipe kickers.
E.
Separate stone and masonry waste and place in designated area for
use as structural fill or in landscaping of the project.
END OF SECTION
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