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Historic Preservation - Technical Procedures
Installing Grouted Exterior Brick Pavers
Tacoma Union Station Courthouse - Tacoma, Wa
Installing Grouted Exterior Brick Pavers
INSTALLING GROUTED EXTERIOR BRICK PAVERS
A. This procedure includes guidance on installing exterior
brick paving and applying portland cement grout to
replace deteriorated sections of existing paving and
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. American Society for Testing and Materials (ASTM), 100
Barr Drive, West Conshohocken, PA 19428, (610) 832-9585
or FAX (610) 832-9555.
1. Submit samples of brick pavers showing full extent
of colors and texture; samples shall be compared to
existing face brick on building.
2. Submit grout color samples.
B. Product Data: Submit product data on latex additives for
grout and setting bed.
1.04 DELIVERY, STORAGE AND HANDLING
A. Protect masonry materials during storage and construction
against wetting by rain, snow or ground water and against
soilage or intermixture with earth or other types of
1.05 PROJECT/SITE CONDITIONS
A. Protection: Protect mortar bed and grout against uneven
and excessive evaporation. Cure as required by climatic
and job conditions so as to achieve proper hydration.
Provide suitable coverings, moist curing barriers, etc.
A. Brick Pavers: Pavers shall be solid, uncored, smooth
units in color to match existing face brick color. Units
shall conform with requirements of ASTM C902, Class SX,
Type 1, Application PS.
1. Not less than 10,500 psi average compressive
2. Not more than 8 percent cold water absorption after
24 hour submersion in cold water.
3. Size shall be as indicated on the drawings.
B. Setting Materials:
1. Portland Cement: ASTM C150, Type I or II, of
natural color or white, as required to produce the
required color of grout.
2. Aggregate for Setting Bed: Clean, fine sand
conforming to ASTM C144, uniformly graded from
coarse to fine with 100% passing the No. 4 sieve
and not more than 5% passing the No. 100 sieve.
3. Aggregate for Grout: Clean, fine sand conforming
to ASTM C144, uniformly graded from coarse to fine
with not more than 5% passing the No. 100 sieve;
100% may pass the No. 30 sieve, but if the work
requires a coarser sand, the coarse sieve size
limit may be increased to the No. 16 size.
4. Latex Additive for Thick Bed Mortar and Grout:
Laticrete International, Inc. "3701 Latex
Additive", or approved latex material which is
recommended for use in thick bed mortars and grout
for exterior applications.
5. Color Pigments: For colored grout, use natural and
synthetic iron oxides and chromium oxides,
compounded for use in grout mixes. Use only
pigments with record of satisfactory performance in
masonry grouts. Solomon Grind-Chem Services, Inc.
"SGS Mortar Colors", Davis "True Tone Mortar
Colors", or approved equal.
6. Water shall be clean, free of deleterious materials
which would impair strength or bond.
7. Latex Additive for Bond Coat: Laticrete
International, Inc. "4237 Thin Set Mortar
Additive", or approved.
A. Setting Bed: Proportions for setting bed shall be 1 part
Portland cement, 3 parts sand with 50 percent latex
additive and 50 percent water. Sand shall be measured in
damp, loose condition. Use only enough latex additive
and water to produce a moist surface when setting bed is
ready for setting of paver units.
B. Bond Coat: Consist of 1 part Portland cement, 1 part
sand with 50 percent latex additive and 50 percent water,
and color pigment. Sand shall be measured in damp, loose
A. Installer must examine the areas and conditions under
which brick paving is to be installed. Do not proceed
with work until unsatisfactory conditions have been
corrected in a manner acceptable to Installer.
Commencement of work constitutes acceptance of surfaces.
3.02 ERECTION, INSTALLATION, APPLICATION
A. Paver Installation, General:
1. Do not use units with chips, cracks, voids,
discolorations or other defects which might be
visible or cause staining in finished work.
2. Cut units with motor-driven saw equipment designed
to cut masonry with clean, sharp unchipped edges.
Cut units as required to provide pattern shown and
to fit adjoining work neatly. Use full units
without cutting wherever possible.
3. Set units in patterns shown with uniform joint
4. Maintain surface plane for finished masonry paving
not exceeding a tolerance of 1/8" in 10 feet when
tested with a 10 foot straightedge.
B. Portland Cement Application:
1. Spread and screed to uniform thickness, except for
minor variations required to produce a true
surface, level in plane or uniformly sloped for
drainage as shown. Cut back, bevel edge, remove
and discard setting bed material which has reached
initial set prior to placing of paver units.
2. Wet brick units several hours before laying, unless
their gain in weight resulting from partial
immersion flatware in 1/8" of water for 1 minute is
less than 3/4 oz. per 30 sq. in. of immersed area.
Do not lay bricks with free moisture on the
3. When mortar bed is plastic, apply bond coat with a
notched trowel to a uniform thickness of 1/32" to
1/16". Do not apply more mortar than can be
covered within 20 to 30 minutes or before the
surface has developed a skin. Each paver unit
shall be back buttered with mortar before setting.
Tamp and beat paver units for a complete contact
between pavers and setting bed. Set and level each
4. Grout joints as soon as possible after initial set
of setting bed. Force grout into joints, taking
care not to smear grout on adjoining paver units
and other surfaces. After initial set of grout,
finish joints by tooling to produce a very slightly
concave polished joint, free from drying cracks.
5. Cure grout by maintaining in a damp condition for 7
C. Repair and Pointing:
1. Remove and replace paver units which are loose,
chipped, broken, stained or otherwise damaged, or
if units do not match adjoining units. Provide new
units to match adjoining units and install in fresh
mortar or grout, pointed to eliminate evidence of
2. Pointing: During the tooling of joints, enlarge
voids of holes and completely fill with mortar or
END OF SECTION