6-321400 UNITIZED PAVING ADD-1Prospect Place Berkshire Design Group
737 Bridge Rd March 27, 2024
Northampton, MA
UNITIZED PAVING
ADD-1 3/29/2024
32-1400 – 1
SECTION 32 1400 - CONCRETE UNIT PAVING
PART 1 - GENERAL
1.1 SUMMARY
A.Section Includes:
1.Concrete pavers.
2.Curbs and edge restraints.
B.Related Requirements:
1.Division 32 "Concrete Paving" for concrete base under unit pavers.
1.2 PREINSTALLATION MEETINGS
A.Preinstallation Conference: Conduct conference at Project site.
1.3 ACTION SUBMITTALS
A.Product Data:
1.For materials other than water and aggregates.
2.For the following:
a. Pavers.
b.Bituminous setting materials.
c.Mortar and grout materials.
d.Edge restraints.
B.Sieve Analyses: For aggregate setting-bed materials, according to ASTM C136.
C.Samples for Initial Selection: For each type of unit paver indicated[.][ and the following:]
1.Joint materials involving color selection.
2.Exposed edge restraints involving color selection.
3.Granite curbs.
D.Samples for Verification: For full-size units of each type of unit paver indicated Include Samples
of the following:
1. Joint materials.
2.Exposed edge restraints.
3.Unit Paver
Prospect Place Berkshire Design Group
737 Bridge Rd March 27, 2024
Northampton, MA
UNITIZED PAVING
ADD-1 3/29/2024
32-1400 – 2
1.4 INFORMATIONAL SUBMITTALS
A.Qualification Data: For Installer.
B.Material Certificates: For unit pavers. Include statements of material properties indicating
compliance with requirements, including compliance with standards. Provide for each type and
size of unit.
C.Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified
testing agency, for unit pavers, indicating compliance with requirements.
1.For solid interlocking paving units, include test data for freezing and thawing according to
ASTM C67.
1.5 QUALITY ASSURANCE
A.Installer Qualifications: A qualified unit paving installer. Installer's [field supervisor] must have
Concrete Paver Installer Certification from the Interlocking Concrete Pavement Institute (ICPI)
with the following designations:
1.Commercial Paver Technician Designation.
B.Mockups: Build mockups to verify selections made under Sample submittals, to demonstrate
aesthetic effects, and to set quality standards for materials and execution.
1.Subject to compliance with requirements, approved mockups may become part of the
completed Work if undisturbed at time of Substantial Completion.
1.6 PRECONSTRUCTION TESTING
1.Use manufacturer's standard test methods to determine whether mortar and grout
materials will obtain optimal adhesion with, and will be nonstaining to, installed brick and
other materials constituting brick flooring installation.
1.7 DELIVERY, STORAGE, AND HANDLING
A.Store pavers on elevated platforms in a dry location. If units are not stored in an enclosed
location, cover tops and sides of stacks with waterproof sheeting, securely tied.
B.Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not
use cementitious materials that have become damp.
C.Store aggregates where grading and other required characteristics can be maintained and
contamination avoided.
D.Store asphalt cement and other bituminous materials in tightly closed containers.
Prospect Place Berkshire Design Group
737 Bridge Rd March 27, 2024
Northampton, MA
UNITIZED PAVING
ADD-1 3/29/2024
32-1400 – 3
1.8 FIELD CONDITIONS
A.Cold-Weather Protection: Do not use frozen materials or materials mixed or coated with ice or
frost. Do not build on frozen subgrade or setting beds. Remove and replace unit paver work
damaged by frost or freezing.
B.Weather Limitations for Bituminous Setting Bed:
1.Install bituminous setting bed only when ambient temperature is above 40 deg F
(4 deg C) and when base is dry.
2.Apply asphalt adhesive only when ambient temperature is above 50 deg F (10 deg C)
and when temperature has not been below 35 deg F (2 deg C) for 12 hours immediately
before application. Do not apply when setting bed is wet or contains excess moisture.
C.Weather Limitations for Mortar and Grout:
1.Cold-Weather Requirements: Comply with cold-weather construction requirements
contained in TMS 602/ACI 530.1/ASCE 6.
2. Hot-Weather Requirements: Comply with hot-weather construction requirements
contained in TMS 602/ACI 530.1/ASCE 6. Provide artificial shade and windbreaks and
use cooled materials as required. Do not apply mortar to substrates with temperatures of
100 deg F (38 deg C) and higher.
a.When ambient temperature exceeds 100 deg F (38 deg C), or when wind velocity
exceeds 8 mph (13 km/h) and ambient temperature exceeds 90 deg F (32 deg C),
set pavers within 1 minute of spreading setting-bed mortar.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A.Source Limitations: Obtain each type of unit paver, joint material, and setting material from
single source with resources to provide materials and products of consistent quality in
appearance and physical properties.
2.2 CONCRETE PAVERS
A.Concrete Pavers, Solid Paving Units: Complying with ASTM C936/C936M[ and resistant to
freezing and thawing when tested according to ASTM C67], made from normal-weight
aggregates.
1.Basis of Design:
a.Unilock Artline Pavers, Landscape Architect and/or owner to choose from full
range of colors, sizes, and finishes.
2.3 CURBS AND EDGE RESTRAINTS
A.Steel Edge Restraints: Manufacturer's standard painted steel edging [3/16 inch (4.8 mm) thick
by 4 inches (100 mm) high] with loops pressed from or welded to face to receive stakes at 36
inches (900 mm) o.c. and steel stakes 15 inches (380 mm) long for each loop.
1. Color: Black or Dark Grey
Prospect Place Berkshire Design Group
737 Bridge Rd March 27, 2024
Northampton, MA
UNITIZED PAVING
ADD-1 3/29/2024
32-1400 – 4
2.4 ACCESSORIES
A.Cork Joint Filler: Preformed strips complying with ASTM D1752, Type II.
B.Compressible Foam Filler: Preformed strips complying with ASTM D1056, Grade 2A1.
C.Nonwoven geotextile fabric to place over weep holes in concrete slab underlayment.
2.5 BITUMINOUS SETTING-BED MATERIALS
A.Primer for Base: ASTM D2028/D2028M, cutback asphalt, grade as recommended by unit paver
manufacturer.
B.Fine Aggregate for Setting Bed: ASTM D1073, No. 2 or No. 3.
C.Asphalt Cement: ASTM D3381/D3381M, Viscosity Grade AC-10 or Grade AC-20.
D.Neoprene-Modified Asphalt Adhesive: Paving manufacturer's standard adhesive consisting of
oxidized asphalt combined with 2 percent neoprene and 10 percent long-fibered mineral fibers
containing no asbestos.
E.Sand for Joints: Fine, sharp, washed, natural sand or crushed stone with 100 percent passing
No. 16 (1.18-mm) sieve and no more than 10 percent passing No. 200 (0.075-mm) sieve.
1.Provide sand of color needed to produce required joint color.
2.Provide Polymeric Sand for joints
2.6 BITUMINOUS SETTING-BED MIX
A.Mix bituminous setting-bed materials at an asphalt plant in approximate proportion, by weight, of
7 percent asphalt cement to 93 percent fine aggregate unless otherwise indicated. Heat mixture
to 300 deg F (149 deg C).
PART 3 - EXECUTION
3.1 EXAMINATION
A.Examine surfaces indicated to receive unit paving, with Installer present, for compliance with
requirements for installation tolerances and other conditions affecting performance.
B.Where unit paving is to be installed over waterproofing, examine waterproofing installation, with
waterproofing Installer present, for protection from paving operations, including areas where
waterproofing system is turned up or flashed against vertical surfaces.
C.Proceed with installation only after unsatisfactory conditions have been corrected and
waterproofing protection is in place.
Prospect Place Berkshire Design Group
737 Bridge Rd March 27, 2024
Northampton, MA
UNITIZED PAVING
ADD-1 3/29/2024
32-1400 – 5
3.2 PREPARATION
A.Remove substances from concrete substrates that could impair bond, including curing and
sealing compounds, form oil, and laitance.
B.Sweep concrete substrates to remove dirt, dust, debris, and loose particles.
C.Install weep holes in concrete subbase prior to placing bituminous sand setting bed.
3.3 INSTALLATION, GENERAL
A.Do not use unit pavers with chips, cracks, voids, discolorations, or other defects that might be
visible or cause staining in finished work.
B.Mix pavers from several pallets or cubes, as they are placed, to produce uniform blend of colors
and textures.
C.Cut unit pavers with motor-driven masonry saw equipment to provide clean, sharp, unchipped
edges. Cut units to provide pattern indicated and to fit adjoining work neatly. Use full units
without cutting where possible. Hammer cutting is not acceptable.
1.For concrete pavers, a block splitter may be used.
D.Handle protective-coated brick pavers to prevent coated surfaces from contacting backs or
edges of other units. If, despite these precautions, coating does contact bonding surfaces of
brick, remove coating from bonding surfaces before setting brick.
E.Joint Pattern: Running bond
F.Joint Filler
1.Provide joint filler at waterproofing that is turned up on vertical surfaces unless otherwise
indicated;
G.Tolerances:
1.Do not exceed 1/32-inch (0.8-mm) unit-to-unit offset from flush (lippage) or 1/8 inch in 10
feet (3 mm in 3 m) from level, or indicated slope, for finished surface of paving.
H.Expansion and Control Joints:
1.Provide for expansion joints at locations and of widths indicated in the concrete slab
under the pavers. Provide compressible foam filler as backing for sealant-filled
jointsInstall joint filler before setting pavers. Sealant materials and installation are
specified in Section 079200 "Joint Sealants."
2.Provide cork joint filler at locations and of widths indicated. Install joint filler before setting
pavers. Make top of joint filler flush with top of pavers.
I.Provide edge restraints as indicated. Install edge restraints before placing unit pavers.
1.Install edge restraints to comply with manufacturer's written instructions. Install stakes at
intervals required to hold edge restraints in place during and after unit paver installation.
Prospect Place Berkshire Design Group
737 Bridge Rd March 27, 2024
Northampton, MA
UNITIZED PAVING
ADD-1 3/29/2024
32-1400 – 6
2.For metal edge restraints with top edge exposed, drive stakes at least 1 inch (25 mm)
below top edge.
3.4 BITUMINOUS SETTING-BED APPLICATIONS
A.Apply primer to concrete slab or binder course immediately before placing setting bed.
B.Prepare for setting-bed placement by locating 3/4-inch- (19-mm-) deep control bars
approximately 11 feet (3.3 m) apart and parallel to one another, to serve as guides for striking
board. Adjust bars to subgrades required for accurate setting of paving units to finished grades
indicated.
C.Place bituminous setting bed where indicated, in panels, by spreading bituminous material
between control bars. Spread mix at a minimum temperature of 250 deg F (121 deg C). Strike
setting bed smooth, firm, even, and not less than 3/4 inch (19 mm) thick. Add fresh bituminous
material to low, porous spots after each pass of striking board. After each panel is completed,
advance first control bar to next position in readiness for striking adjacent panels. Carefully fill
depressions that remain after removing depth-control bars.
D.Place pavers carefully by hand in straight courses, maintaining accurate alignment and uniform
top surface. Protect newly laid pavers with plywood panels on which workers can stand.
Advance protective panels as work progresses, but maintain protection in areas subject to
continued movement of materials and equipment to avoid creating depressions or disrupting
alignment of pavers. If additional leveling of paving is required, and before treating joints, roll
paving with power roller after sufficient heat has built up in the surface from several days of hot
weather.
E.Joint Treatment: Place unit pavers with hand-tight joints. Fill joints by sweeping sand over
paved surface until joints are filled. Remove excess sand after joints are filled.
3.5 REPAIRING, POINTING, AND CLEANING
A.Remove and replace unit pavers that are loose, chipped, broken, stained, or otherwise
damaged or that do not match adjoining units. Provide new units to match adjoining units and
install in same manner as original units, with same joint treatment and with no evidence of
replacement.
B.Cleaning: Remove excess setting bed and, joint material from exposed paver surfaces; wash
and scrub clean.
1.Do not allow protective coating to enter floor drains. Trap, collect, and remove coating
material.
2.Install protective sealant as required by manufacturer
END OF SECTION