SECTION 07 92 16 RIGID JOINT SEALANTS/CONCRETE FLOOR JOINT

section 07 92 16 rigid joint sealants/concrete floor joint fillers part 1 – general ================ 1. general

SECTION 07 92 16
RIGID JOINT SEALANTS/CONCRETE FLOOR JOINT FILLERS
PART 1 – GENERAL
================
1.
General Description of Work
A.
Provide all labor, products and equipment required to properly
install semi-rigid filler in joints in the interior concrete floor
slabs.
2.
Scope of Work
A.
Fill all contraction (control) and construction (formed) joints in
the interior concrete floor slab where the joints will be exposed
to material handling vehicle wheels.
B.
Refer to drawings for additional joints possibly requiring filler,
such as joints under racks, joints at column diamonds and pads,
etc.
1.03 Related Work
A.
Division 3, Section 03 30 00 – “Cast-In-Place Concrete”
B.
Division 3, Section 03 01 30 – “Concrete Floor Crack and Joint
Repair”
C.
Division 7, Section 07 91 26 – “Joint Fillers”
1.04 Applicable Standards
A.
Products and installation shall be in compliance with or exceed
the joint filling criteria established in the latest ACI 302 and
ACI 360 Committee published documents.
1.05 Contractor Qualifications
A.
Installer shall have a minimum of three (3) years experience in
the installation of semi-rigid fillers on industrial floors.
B.
Use only Metzger/McGuire Approved Applicators for work covered by
this section.
C.
Approved Applicator shall use tools and equipment specifically
designed for the preparation and placement of industrial joint
fillers.
6.
Submittals
A.
Joint Filler Materials: Submit Manufacturer’s data describing
joint filler proposed for use on the project.
B.
Submit Manufacturer’s Approved Applicator Certificate.
PART 2 – PRODUCTS
1.
Control Joint Filler:
A.
Provide semi-rigid, two-part, self-leveling, 100% solids content
polyurea control and construction joint fillers intended for each
condition listed.
B.
Utilize products with physical properties meeting the following
minimum values.
PROPERTY TEST METHOD PROPERTY VALUE
Shore A Hardness.………….ASTM D2240……………..90 or greater
Tensile Strength.…………….ASTM D638………………900 psi “
Solids Content………………………………………………100%
Acceptable for use in USDA/FDA/CFIA regulated facilities
C.
Products: Subject to compliance with requirements, utilize
products manufactured by Metzger/McGuire Co., Concord, NH (800)
223-6680.
1.
Joint filler for all areas with operating temperatures of 32F
or higher, shall be “EDGE-PRO 80 Rapid Set Polyurea Joint
Filler”.
D.
No joint filler substitutions will be allowed.
2.
Accessories
A.
The use of compressible foam backer rod is strictly prohibited in
ALL saw-cut control joints less than 2” in depth.
B.
Compressible foam backer rod may be used in through slab
construction joints only but MUST be placed at a minimum depth of
2”. No other use of backer rod will be allowed. Refer to
installation section and product technical data for additional
information.
3.
DUST FREE PREPARATION EQUIPMENT
A. Subject to compliance with project requirements, provide equipment
manufactured by the following:
---------------------------------------------------------------------
1. U.S. Saws
2. Gorilla Concrete Tools
3. Pulman-Ermator
4. Diamatic
5. Husqvarna
7. HTC
8. Perfect-Trac
B. DUST EXTRACTION SYSTEM FOR GRINDING/SAWING:
1. HEPA filtration vacuum, designed for use with all hand tools when
grinding
sawing concrete (minimum 125CFM air flow).
2. Provide one of the following: .
a. S26/S36, by Pullman-Ermator
b. D30/D60, by HTC
c. Approved equal
C. JOINT FILLER REMOVAL AND PREPARATION
1. Dust Buggy (MKIII or Standard) by U.S. Saws
2. GCT-10/X Tank by Gorilla Concrete Tools
3. JS-130/JS-100E by U.S. Saws
4. Perfect-Trac Saw by Perfect-Trac.
5. Approved equal
PART 3 – EXECUTION
1.
Project Conditions
A.
Work area should be free of obstructions and other trades.
B.
Slab should be visibly dry and all floor scrubbing/washing
activities should be suspended at least 48 hours prior to filler
installation.
2.
Timing of Installation
A.
The American Concrete Institute (ACI) recommends that filling be
deferred as long as possible to allow for maximum slab shrinkage
and joint widening. Deferring filler installation as long as
possible will help to minimize the occurrence of joint filler
separation due to excessive joint widening during concrete cure
(and shrinkage).
B.
For ambient temperatures a 90-120 day slab cure is advisable.
Deferring filling until after facility is under permanent
temperature control is best, if possible. At a minimum slab cure
time should exceed 28 days per ACI 302.
C.
If building is to have HVAC/climate control it is recommended that
such system be activated for a minimum of 7 days prior to filler
installation.
3.
Examination of Conditions
A.
It is the responsibility of the installer to inspect project and
joint conditions and notify on-site management in writing of any
deficiencies that might adversely affect the quality or durability
of the work performed or his contract price.
B.
Start of work by the installer implies acceptance of conditions.
4.
pre-Installation Sample
A.
Before start of actual work the applicator shall install samples
to demonstrate his intended procedures and finished product.
Sample shall include at least 25’ each of both contraction and
construction joints and be performed in the presence of on-site
management.
B.
If procedures and finished product are approved they will be
considered a standard for the entire project.
5.
Joint Preparation
A.
Prior to installation of joint fillers, all saw-cut joints shall
be thoroughly cleaned to their full original depth. Typically 1 ¼
- 1 ½” in a 6” slab, 2” in an 8” slab. Where the original saw-cut
depth exceeds 2”, joint preparation and filling must be performed
to a minimum depth of 2”.
B.
Construction (formed, through slab) joints that are not saw-cut
shall be cleaned to a minimum depth of 2”.
C.
Preparation shall be performed using a vacuum-equipped saw that
will reach the base of the saw-cut joint or to a depth of 2” in
the case of through slab construction joints, and shall be used in
a manner that takes both joint walls back to bare concrete,
removing all saw laitance, curing compounds, sealers, debris, etc.
Joint cleaning may be performed using two cleaning passes, one
along each side of the joint. Or, if only one cleaning pass is
performed, the diamond blade width must be slightly wider than the
joint to be cleaned.
D.
Where joints have minor edge chips, said chips shall be “squared
off” and filled along with the joint itself.
E.
Keep prepared joints free of dust, moisture, and jobsite debris
prior to filling.
6.
Choking-Off Joint Bottom
A.
Compressible backer rod is prohibited in saw-cut joints unless
they exceed 2” deep.
B.
Compressible backer rod may be used in through-slab (non-sawn)
construction joints but must be recessed at least 2” below the
slab surface.
Caution: The use of backer rod in any saw-cut joints less than 2” deep
will result in the rejection of all saw-cut joints work.
3.07 Joint Filler Installation
A.
Installation of EDGE-PRO 80 Rapid Set Polyurea Joint Filler:
1.
Pre-mix Part “A” component (polyol) to re-distribute any
settlement that may have occurred during shipping or storage.
2.
Because of extremely short pot life, “Edge-Pro 80” must be
dispensed using dual-component power dispensing equipment or
through dual-component cartridge units. Pump, reservoir tanks
and dispensing wand should be heated for all freezer work.
3.
Fill joint in one pass, from bottom to top, slightly overfilling
the joint.
4.
After “Edge-Pro 80” has fully cured, razor off excess to leave a
flush filler profile. Timing of the razoring (30 min. to 4 hours
typically) can affect flushness; test for shave time that will
result in flush shave.
5.
If low spots exist or if the finish profile is not flush, abrade
the filler surface with a wire brush, wire wheel, or other means
and apply an additional cap bead of Edge-Pro 80 filler. Allow to
cure, and razor flush to the floor surface.
PART 4 -QUALITY ASSURANCE
4.01 Joint Filler Deficiencies:
A.
Installer is advised that significant deficiencies in workmanship,
including:
less than proper filler depth, inadequate joint cleaning, concave
filler profile,
etc., shall be removed and properly replaced.
B.
Joint filler installed to depths less than specified in this
Section shall be removed and replaced at no additional cost to the
General Contractor or Owner. As each sector of work is completed
the general contractor, using a 1/8” drill bit, shall drill
through the filler to verify filler depth. GC shall test drill at
an approximate rate of 1 core every 500 lineal feet. Location of
core and filler depth found shall be recorded and provided to the
owner prior to project completion.
END OF SECTION
07 92 16 – 4
Rigid Joint Sealants/Concrete Floor Joint Fillers May 14, 2020