Product Data Sheet
|03 01 30.71|
DATA SHEET 3900-379
One Component, Flowable, Form & Pour Structural Repair Mortar
MEADOW-CRETE FNP is a one-component, flowable, shrinkage-compensated, corrosion inhibitor enhanced repair mortar for structural applications. MEADOW-CRETE FNP can be formed and poured or formed and pumped, utilizing a suitable grout pump. It has low permeability, protects embedded reinforcing steel and provides a lower in-place cost.
The product is ideal for the reinstatement or repair of beams, columns, and balcony edges, or for partial depth or full depth placement. MEADOW-CRETE FNP is suitable for industrial, residential, and civil engineering applications.
- Migrating corrosion inhibitor enhanced/Protects localized and adjacent reinforcing steel.
- Very flowable/Can be poured or pumped.
- May be extended/Lower in cost placement.
- Low permeability/Protects embedded reinforcing steel.
- Shrinkage compensated/Added dynamic stability.
- Highly engineered/Non segregating, re-dispersible.
PACKAGING AND YIELD
22.7 kg (50 lb.) bag yields 11.32 litres (0.40 ft.³).
The yield listed above is based on 3.07 litres (3.25 U.S. quarts) of water per 22.7 kg. (50 lb.) bag and will vary based on substrate profile, aggregate, variations in mix water amounts, and waste/rebound. Field trials should be performed to determine yields based on jobsite conditions.
STORAGE AND SHELF LIFE
Store on pallets in a cool, dry location. Do not store products outdoors. Shelf life of properly stored product is one year from date of manufacture in unopened, original packaging.
The following data was determined using the maximum water to powder ratio of 3.07 litres (3.25 quarts) per 22.7 kg (50 lb.) bag at 23.5° C (75° F).
Set Time per ASTM C 191
Initial 4 hours
Final 6 hours
Working Time 30 minutes
Flow Per ASTM C 1911 Flowable
Compressive Strength per ASTM C 1091
@ 1 day 15.5 MPa (2,250 psi.)
@ 7 days 52.0 MPa (7,500 psi)
@ 28 days 55.0 MPa (8,000 psi.)
Bond Strength Per ASTM C 88212
@ 1 day 4.5 MPa (650 psi)
@ 28 days 27 MPa (3,400 psi)
Modulus of Elasticity Per ASTM C 4691 28.5 GPa (4.13 x 106 psi)
Length Change Per ASTM C 1571 Drying Shrinkage
@ 28 days -0.040% (400 µ strain)
Length Change Per ASTM C 1571 (Modified)
Specimens stored at 23°C ±1° C (73°F ±3° F) and 50 ±4% RH, continuously.
Drying Shrinkage @ 28 days -0.091% (910 µ strain)
Flexural Strength Per ASTM 3481
@ 1 day 4.5 MPa (650 psi)
@ 28 days 13 MPa (1,850 psi)
Freeze-Thaw Resistance Per ASTM C 666 (Procedure A)1
@ 300 Cycles 97% RDM3
All technical data is typical information, but may vary due to testing methods, conditions, and procedures.
1Independent reports are available on request.
2Modified – No bonding agent used. Pre-dampening of properly prepared substrate.
3RDM – Relative Dynamic Modulus
FOR BEST PERFORMANCE:
MEADOW-CRETE FNP is recommended for concrete repairs only.
Not intended to be used as a self-leveling underlayment or topping.
Do not apply below 4° C (40° F) or above 32° C (90° F) or when rain is imminent.
Protect from freezing for a minimum of 24 hours.
Do not bridge moving cracks. Extend existing control and expansion joints through MEADOW-CRETE FNP.
For large areas with no control, expansion or construction joints, refer to ACI guidelines.
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 12 mm (1/2″). Do not featheredge.
Protect from conditions that may cause early water loss; high winds, low humidity, high temperature, direct sunlight. Early water loss is aggravated in thin applications.
Realize that the use of extender aggregate will alter physical properties.
Failure to follow industry standard practices may result in decreased material performance.
Surface Preparation … Perform surface preparation in accordance with ICRI Technical Guidelines No. 03730. Mechanically abrade existing substrate to remove all unsound concrete, but do not use excessive force, which may cause micro-fracturing. Substrate must be structurally sound and free of any contaminants that will adversely affect bond. Prepared surface must be dust-free and have a sufficient profile to ensure adequate mechanical lock. Saw cut perimeter of repair zone to a depth of 12 mm (1/2″) to avoid featheredging.
Completely expose all reinforcing steel, ensuring a minimum clearance of 19 mm (¾”) behind reinforcing steel. Perform reinforcing steel preparation in accordance with ICRI Technical Guidelines No. 03730. Presoak repair zone prior to application of MEADOW-CRETE FNP to a saturated, surface dry (SSD) condition and free of standing water.
Mixing … Mix only complete bags. Using a mortar type mixer, pour 2.84 litres (3.00 U.S. quarts) per 22.7 kg (50 lb.) bag. Slowly add MEADOW-CRETE FNP while mixing. Adjust mix consistency using up to an additional 0.47 litres (0.50 U.S. quarts) of water, as required. Mix for 3-5 minutes or until homogenous and lump-free. Do not over mix.
Forming … Support formwork as to ensure a tight seal with repair zone. 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. Pre-soak repair zone for 24 hours, prior to placement to a saturated, surface dry (SSD) condition.
Placement … Pour or pump properly mixed product immediately following proper 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.
Curing … Cure MEADOW-CRETE FNP immediately following application using a suitable curing compound from W. R. MEADOWS, or in accordance with ACI 308. W. R. MEADOWS recommends 1220-WHITE or 1100-CLEAR for curing. When conditions exist for rapid early water loss, the use of EVAPRE™, an evaporation retarder from W. R. MEADOWS, is also recommended.
HEALTH AND SAFETY
Avoid inhalation of dust. Avoid direct contact with this product. Utilize gloves and safety glasses to minimize direct contact. If contact occurs, wash affected areas with mild soap and water. Keep product out of reach of children. For industrial use only. Refer to Material Safety Data Sheet for complete health and safety information.
MASTERFORMAT NUMBER AND TITLE
03 01 30.71 – Rehabilitation of Cast-in-Place Concrete
May help contribute to LEED credits:
- MR Credit 2: Construction Waste Management
- MR Credit 4: Recycled Content
- MR Credit 5: Regional Materials