SECTION 03051
CONCRETE SEALER
PART 1 GENERAL
1.1 SECTION
INCLUDES
A. Penetrating
sealer for concrete surfaces.
1.2 RELATED
SECTIONS
A. Section
03300 - Cast-in-Place Concrete.
1.3 REFERENCES
A. AASHTO
T259 - Method of Test for Resistance of Concrete to Chloride Ion Penetration.
B. ASTM
C 1202 - Standard Test Method for Electrical Indication of Concrete's Ability
to Resist Chloride Ion Penetration.
1.4 SUBMITTALS
A. Comply
with Section 01330 - Submittal Procedures.
B. Product
Data: Submit manufacturer's product
data, including surface preparation and application instructions.
1.5 DELIVERY,
STORAGE, AND HANDLING
A. Delivery: Deliver materials to site in manufacturer's
original, unopened containers and packaging, with labels clearly identifying
product name and manufacturer.
B. Storage: Store materials in clean, dry area in
accordance with manufacturer's instructions.
Keep containers sealed until ready for use.
C. Handling: Protect materials during handling and application
to prevent damage or contamination.
1.6 ENVIRONMENTAL
REQUIREMENTS
A. Do
not apply concrete sealer if air temperature is expected to be below 32 degrees
F (0 degrees C) within 24 hours after application.
PART 2 PRODUCTS
2.1 MANUFACTURER
A. DynaCrete
Int. Inc., Suite 519, #1-5765 Turner Road, Nanaimo, B.C., Canada, V9T 6M4. Toll Free Tech Support (800) 661-2444. Sales
Office (866) 751-7746. Phone (250) 729-0198.
Fax (250) 729-0177. Website
www.dynacrete.com. E-Mail Tech Support rpascoe@dynacrete.com Sales Office dchamber@dynacrete.com
2.2 CONCRETE
SEALER
A. Concrete
Sealer: DynaCrete PIM+ Permanent
Internal Membrane.
1. Description: Clear, water-based, non-toxic,
non-flammable, odorless, water-soluble, penetrating liquid compound.
2. Specific
Gravity: 1.094.
3. pH (1 percent
solution): 8.96.
4. Volatile
Organic Compounds (VOC) Content: 0.
B. Chloride
Ion Penetration Test, AASHTO T259:
1. Concrete
samples treated with DynaCrete PIM+ after 24 hours of casting and dry
laboratory cured for 28 days before ponding with chloride solution for 90 days:
a. Depth 2 to 13
mm: 0.095 chloride ion content percent
by mass of concrete.
b. Depth 13 to 25
mm: 0.022 chloride ion content percent
by mass of concrete.
2. Concrete
samples treated with DynaCrete PIM+ after 21 days of dry laboratory curing and
then ponding at 28 days with chloride solution:
a. Depth 2 to 13
mm: 0.105 chloride ion content percent
by mass of concrete.
b. Depth 13 to 25
mm: 0.025 chloride ion content percent
by mass of concrete.
C. Rapid
Chloride Permeability Test, ASTM C 1202:
1. Concrete
samples treated with DynaCrete PIM+ after 24 hours of casting and dry
laboratory cured for 28 days before ponding with chloride solution: 18.1 percent average drop in Coulombs as
compared with control samples.
2. Concrete
samples treated with DynaCrete PIM+ after 21 days of dry laboratory curing and
then ponding at 28 days with chloride solution: 47.2 percent average drop in Coulombs as compared with control
samples.
PART 3 EXECUTION
3.1 EXAMINATION
A. Examine
concrete surfaces to receive concrete sealer.
Notify Architect if surfaces are not acceptable. Do not begin surface preparation or application
until unacceptable conditions are corrected.
3.2 PROTECTION
OF SURROUNDING AREAS
A. Do
not allow concrete sealer to contact non-alkali bearing materials, glass,
glazed surfaces, or aluminum, as etching will occur.
B. Use
protective coverings to prevent overspray contact or wind-carried contact with
surrounding surfaces.
3.3 SURFACE
PREPARATION
A. Prepare
concrete surfaces in accordance with manufacturer's instructions.
B. Ensure
surfaces are free of cracks and defects greater than 0.04 inch (1 mm) in width.
C. Repair
cracks in accordance with manufacturer's instructions.
D. Ensure
surfaces are clean, free of standing water, and sound.
E. Remove
dirt, dust, oil, grease, paint, coatings, sealers, laitance, efflorescence, and
other materials that could interfere with performance of concrete sealer.
3.4 APPLICATION
A. Apply
concrete sealer to concrete surfaces in accordance with manufacturer's
instructions at locations indicated on the Drawings.
B. Do
not dilute concrete sealer, except in accordance with manufacturer's
instructions.
C. Testing
Surfaces: Before application, determine
coverage rate and number of coats required for each substrate by testing small
inconspicuous areas of surfaces to receive concrete sealer.
D. Apply
concrete sealer to damp surfaces.
E. Saturate
surfaces with concrete sealer. Do not
leave puddles.
F. Flush
surfaces with clean water 16 to 24 hours after first application of concrete
sealer to remove alkalis and contaminants leaching to surface. Allow surfaces to dry.
G. Determine
if additional applications of concrete sealer are necessary by testing surfaces
in accordance with manufacturer's instructions.
H. Apply
additional applications of concrete sealer, if necessary, until flushing with
clean water no longer flushes alkali and contaminants to surface.
I. Allow
surfaces to thoroughly dry for a minimum of 24 hours after completion of final
application of concrete sealer and testing of surfaces, before application of
secondary coatings.
J. Vertical
Formed Surfaces: Apply concrete sealer
in accordance with manufacturer's instructions as soon as forms have been
stripped and surfaces rubbed, if required.
K. Do
not use concrete sealer to fill or seal cracks.
3.5 PROTECTION
OF WORK AFTER APPLICATION
A. Protect
horizontal surfaces from foot traffic until concrete sealer has cured and
surfaces appear dry.