MEADOW-CRETE® FNP EXTENDED
One-Component, Pre-Extended, Flowable, Form & Pour Structural Repair Mortar
DESCRIPTION
MEADOW-CRETE FNP EXTENDED is a one-component,
pre-extended, shrinkage-compensated
repair mortar for structural repairs and reinstatement
of concrete elements. The product can be formed
and poured or formed and pumped, utilizing a
suitable concrete pump. MEADOW-CRETE FNP
EXTENDED contains 3/8” nominal size aggregate
and is suitable for applications requiring cathodic
protection, impressed systems, or sacrificial anode
applications.
USES
MEADOW-CRETE FNP EXTENDED is ideal for
reinstatement or repair of beams, columns, and
balcony edges or for partial or full depth horizontal
placement. The product is suitable for industrial,
transportation, residential, and civil engineering
applications.
| FEATURES/BENEFITS |
- Can be poured or pumped.
- Low permeability/Protects embedded
reinforcing steel.
- Suitable for cathodic protection systems.
- Shrinkage compensated/Added dynamic
stability.
- Highly engineered/Non-segregating.
- No added slag, chlorides, or microsilica.
|
PACKAGING AND YIELD
Seventy lb. (31.8 kg) bag yields 0.58 ft.³ (0.016 m³)
Yields listed above are based on seven pints (3.3 L)
of water per bag and will vary based on substrate
profile, aggregate, variations in mix water amounts
and waste. Field trials should be performed to
determine yields based on jobsite conditions.
SHELF LIFE (TYPICAL)
12 months when stored on pallets in a dry, cool area.
TECHNICAL DATA*
The following data was determined
using the maximum water to powder ratio of 7 pints (3.3 L)
per 70 lb. bag at 75ºF (23.5ºC).
Set Time per ASTM C 191
Initial
Final |
4 hours
6 hours |
| Consistency |
Minimum 5” slump |
Compressive Strength per ASTM C 109
@ 1 day
@ 7 days
@ 28 days |
2000 psi (13.8 MPa)
4000 psi (27.6 MPa)
5000 psi (34.5 MPa) |
Bond Strength per ASTM C 882
@ 28 days
|
1700 psi (11.7 MPa) |
Length Change per ASTM C 157
Drying Shrinkage @ 28 days |
0.034% (340 μ strain) |
Flexural Strength per ASTM C 348
@28 days |
650 psi (4.48 MPa) |
| Aggregate Size |
3/8” nominal |
Freeze-Thaw Resistance per ASTM C 666 (Procedure A)
At 300 Cycles |
90% Relative Dynamic Modulus |
| All technical data is typical information, but may vary due
to testing methods, conditions and operators. |
LEED INFORMATION
May help contribute to LEED credits: |
- MR Credit 4.1: Recycled Content: 10%
- MR Credit 4.2: Recycled Content: 20%
- MR Credit 5.1: Regional Materials: 10% Extracted,
Processed & Manufactured Regionally
- MR Credit 5.2: Regional Materials: 20% Extracted,
Processed & Manufactured Regionally
|
| FOR BEST PERFORMANCE |
- MEADOW-CRETE FNP EXTENDED is recommended for concrete repairs
only.
- Do not use as an underlayment, topping, or overlay.
- Do not apply below 40° F (4° C) or when rain is imminent.
- Protect from freezing for a minimum of 48 hours.
- Do not bridge moving cracks. Extend existing control and expansion joints
through MEADOW-CRETE FNP EXTENDED.
- Do not add any admixtures.
- Exceeding liquid requirements shall result in reduced physical properties
- Realize that set time will decrease as the product, air, substrate, and mixing
liquid temperature increases and will increase as the temperature decreases.
- Repair areas should be saw cut and slightly undercut to a minimum depth of a
3/4” (19 mm). Do not featheredge.
- Protect from conditions that may cause early water loss: wind, low humidity,
high temperature, direct sunlight. Early water loss is exasperated in thin
applications.
- Failure to follow ACI concreting and industry standard practices will result in
decreased material performance. Proper application is the responsibility of the
user. Field visits by W. R. MEADOWS personnel are for the purpose of
making technical recommendations only, and are not to supervise or provide
quality control on the jobsite.
|
SURFACE PREPARATION
Perform surface preparation in accordance with ICRI Technical Guidelines
#310.2-1997: Specifying Concrete Surface Preparation for Sealers, Coatings, and
Polymer Overlays. Mechanically roughen or high pressure water-jet the existing
concrete substrate to a minimum concrete surface profile (CSP) of CSP-7 or
higher, depending on substrate condition. Remove all unsound concrete and
provide a profiled, porous surface. The substrate must be structurally sound,
dust-free, and free of grease, oil, dirt, curing compounds, release agents, or any
other surface or penetrated contaminants that will adversely affect bond.
Sanding, grinding, or wire-brushing are not approved surface preparation
methods. Saw cut perimeter of repair zone to a depth of 3/4" (19 mm).
Completely expose all reinforcing steel, ensuring a minimum clearance of 1”
(2.54 cm) behind reinforcing steel. Perform reinforcing steel preparation in
accordance with ICRI Technical Guidelines #03730. Pre-soak repair zone for a
minimum four hours prior to application of MEADOW-CRETE FNP
EXTENDED. Substrate must be saturated, surface dry (SSD) and free of
standing water.
Mixing … Mix only complete bags. Using a mortar- or concrete-type mixer
designed for products containing a coarse aggregate, pour six pints (2.83 L)
water per bag. Slowly add MEADOW-CRETE FNP EXTENDED while mixing.
Adjust mix consistency using up to one pint (0.47 L) additional water. Mix for 3-
5 minutes or until homogenous and lump-free. Do not over mix. Do not retemper.
Forming...Support formwork as to ensure a tight seal
with repair zone. Consult professional engineer
regarding structural support and shoring requirements.
Formwork should be rigid, structurally stable, sealed,
and coated with a suitable release agent, such as
DUOGARD® from W. R. MEADOWS. Forming should
be accomplished in accordance with ACI 347-88. Proper
vent and drainage ports should be installed as required to
ensure no entrapment of air voids.
Placement … Pour or pump properly mixed product
immediately following mixing to ensure adequate flow.
Pumping should be accomplished in accordance with
ACI 304-R-85. Do not re-temper or over-work product.
Follow ACI 305-R89: Standard on Hot Weather
Concreting or ACI 306-R88: Standard on Cold Weather
Concreting when applicable. In large applications
[greater than 8” (20.3 cm) in depth], follow pertinent
ACI recommendations for concrete placement.
Curing … Cure in accordance with ACI 308. Cure
MEADOW-CRETE FNP EXTENDED immediately
following removal of forms prior to a seven-day cure
time using a curing compound such as 1100-CLEAR or
2200-WHITE from W. R. MEADOWS. Curing
compounds may discolor and may require complete
removal prior to topcoating, painting, sealing,
waterproofing, or similar application.
PRECAUTIONS
Contains Portland cement and crystalline silica (sand),
which are suspected carcinogens. Skin and eye irritant.
Dust may cause respiratory tract irritation. Follow
OSHA safety regulations when handling. Avoid
inhalation of dust. Avoid direct contact with this
product. Utilize chemical resistant gloves and safety
glasses to minimize direct contact. May cause serious
delayed lung injury (silicosis). If contact occurs, wash
affected areas with mild soap and water. For eye contact,
flush with water for a minimum 15 minutes and contact
a physician immediately. Keep product out of reach of
children. For industrial use only. Not for consumption.
Refer to Material Safety Data Sheet for complete health
and safety information.
This material last updated
August 2009.
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