Product Data, W. R. MEADOWS
03 01 30.61
No. 385
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MEADOW-PATCH™ T1

ONE-COMPONENT, POLYMER-MODIFIED, THIN REPAIR PATCH MORTAR

DESCRIPTION
MEADOW-PATCH T1 is a one-component, polymer-modified, cementitious repair mortar designed for horizontal, vertical and overhead applications. This all-purpose mortar is designed for maintenance patching and minor repairs 1” to featheredge.

USES
MEADOW-PATCH T1 is versatile, easy to mix and apply, and produces repaired surfaces suitable for rubber-wheeled traffic. For overhead or vertical use, MEADOW-PATCH T1 is an ideal choice for smoothing rough surfaces, repairing honeycombs and dressing up bug holes. When mixed, its creamy consistency provides an excellent skim coating for swimming pools, concrete walls, balconies, etc. Because of its excellent bond and freeze-thaw resistance, MEADOW-PATCH T1 may be used for interior and/or exterior applications: below-, above- or on-grade.

FEATURES/BENEFITS

TECHNICAL DATA*
Set times (per ASTM C 191)
Initial
Final
 2 hours
3 hours
Compressive strength (per ASTM C 109)
@ 1 day
@ 28 days		 3,000 psi (20.7 MPa)
6,500 psi (44.8 MPa)

*Alll technical data is typical information, but may vary due to testing methods, conditions and operators.

COLOR AND YIELD
Color is cement gray. MEADOW-PATCH T1 covers approximately 55 ft.² @ 1/8". (5 m² @ 3 mm). Yield per 50 lb.-bag is 0.50 ft.³ (0.014 m³)

PACKAGING AND STORAGE
MEADOW-PATCH T1 is available in 50 lb. (22.7 kg) bags. When stored on pallets in a dry, cool area, it has a shelf life of 12 months.

FOR BEST PERFORMANCE
  • MEADOW-PATCH T1 is recommended for concrete repairs only.
  • Not intended to be used as a self-leveling underlayment or topping; T1 is designed as a trowel-down repair mortar.
  • Do not apply below 40° F (4° C) or above 90° F (32° C) or when rain is imminent.
  • Do not bridge moving cracks. Extend existing control and expansion joints through MEADOW-PATCH T1.
  • For large areas with no control, expansion or construction joints, refer to ACI guidelines.
  • Do not exceed a length-to-width ratio of 2 to 1 for the repair area.
  • 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 be increased as the temperature decreases.
  • Do not use solvent-based curing compounds
  • Featheredging may result in reduced durability and performance.
  • Maximum application thickness should not exceed 1” (25 mm).
  • Protect from conditions that may cause early water loss: high winds, low humidity, high temperature and direct sunlight. Early water loss is amplified in thin and/or small area applications.
  • Realize that the use of extender aggregate will alter physical properties.
  • Failure to follow industry standard practices may 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
  • Avoid steel-wheeled traffic in thin and/or small area applications. Thin and/or small area applications subject to point loading should also be avoided. Protect thin and/or small area applications from rapid water loss.

SURFACE PREPARATION
Mechanically abrade existing substrate to remove all unsound concrete, but do not use excessive force, which may cause micro-fracturing. Prepare surface in accordance with ICRI Technical Guide No. 03730. Substrate must be structurally sound and free of grease, oil, dirt or any other contaminants that can adversely affect the bond. Prepared surface must be dust-free, have sufficient profile [minimum 1/8” (3 mm)] and its concrete pores must be open to ensure adequate mechanical lock. Substrate must be saturated surface dry (SSD) and free of standing water. Mechanical grinding, sanding or wire brushing are not approved surface preparation methods.

For enhanced bond, prime SSD substrate with a slurry coat (two parts powder to one part ACRY-LOK™ from W. R. MEADOWS). Do not allow slurry coat to become tack-free. For optimal bond, prime substrate with REZI-WELD™ 1000 medium-viscosity structural bonding agent – follow surface prep and application procedures as outlined on data sheet.

MIXING
Using a mortar-type mixer, add three quarts (2.8 L) of clean water per 50 lb. (22.7 kg) bag of MEADOW-PATCH T1. Slowly add powder and mix to desired consistency, using up to 0.5 (0.47 L) additional quarts of clean water as needed. Mix for three minutes, or until lump-free consistency is obtained. Do not over-mix. For small repairs, mix in a clean vessel using a variable-speed drill with a paddle mixer at 400-600 rpm. Mix only complete bags. Do not mix more material than can be placed and finished in 30 minutes at 77° F (25° C).

PLACEMENT
Apply MEADOW-PATCH T1 into the repair zone substrate by compacting the material well against the properly prepared substrate. Finish surface with steel or wood trowel or sponge float. Never re-temper.

CURING
Cure MEADOW-PATCH T1 immediately following application using a suitable water-based curing compound from W. R. MEADOWS, or in accordance with ACI 308. W. R. MEADOWS recommends the 2200-WHITE or 1100-CLEAR series for curing. (Do not use solvent-based curing compounds.)

When conditions exist for early water loss, such as, but not limited to, high temperature [90° F (32° C)], high winds, direct sun, low humidity or thin and/or small area patches, we recommend wet curing for 24 hours, immediately followed by an application of 2200-WHITE or 1100-CLEAR series curing compound.

When conditions exist for rapid early water loss, the use of EVAPRE™, an evaporation retarder from W. R. MEADOWS, is also recommended.

PRECAUTIONS
FOR INDUSTRIAL USE ONLY. Refer to Material Safety Data Sheet for complete health and safety information. Keep product out of reach of children.

HEALTH HAZARDS
Avoid direct contact with this product, as it may cause skin and eye irritation. Utilize gloves and safety glasses to minimize direct contact. Avoid inhalation of dust. Inhalation may cause respiratory irritation and/or lung disease (silicosis). This product contains silicon dioxide, which is classified by the IARC and NTP as probably carcinogenic to humans (IARC Group 2A). The use of NIOSH approved respiratory protection is recommended in dusty environments.

This material last updated December 2007.

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