ProSpec® BlendCrete

• Used interior or exterior, above or below grade, on horizontal, vertical and overhead
• Suited for patching distressed surfaces including precast products, concrete pipe, curbs, sidewalks, bridges, panels and walls
• Used to fill honeycombs, formed high rise holes, spalls or irregularities due to misaligned forms or unconsolidated concrete

Preparation:

All materials should be stored at 40°F to 80°F 24 hours prior to installation. Surface must be clean, hard, and free from dirt, loose particles, waxes, plastics, curing compounds, grease, paint, efflorescence, and any foreign materials that will inhibit adhesion.

• Adjoining surfaces must be sound, clean, free of loose or damaged concrete, dust, dirt and other contaminants that will interfere with bond. Completely expose and clean all reinforcing steel, ensuring a minimum clearance of 3/4" behind reinforcing steel.
• Perform reinforcing steel preparation in accordance with ICRI Technical Guidelines No. 03730. For best results patch area edges should be saw cut to a depth of 1/2". Abrade concrete to obtain a rough surface promoting adhesion.
• The area should be saturated surface dry (SSD) with no standing water on the surface. The use of a vigorously scrubbed application of a thinly mixed BlendCrete® bond coat is recommended. This should be applied to all surfaces coming into contact with the patch.
• Do not allow bond coat to dry prior to the placement of the BlendCrete®.

Job Mockups:

The manufacturer requires that when its ProSpec® products are used in any application or as part of any system that includes other manufacturers’ products, the contractor and/or design professional shall test all the system components collectively for compatibility, performance and long-term intended use in accordance with pertinent and accepted industry standards prior to any construction.

Mixing:

• BlendCrete® requires 4 - 5 qt of water per
• 50 lb of powder. Mix only the amount of material that can be placed in 15 minutes.
• Pour the required amount of potable water into a clean mixing container, then add the measured amount of BlendCrete® while continuing to mix and blend thoroughly for 1 - 2 minutes to a lump free, putty like consistency.
• Small amounts of BlendCrete® can be mixed using a trowel or a 1/2" drill (400 - 600 rpm) and paddle.
• For applications of 1/4" - 1/2", mix with 4 - 5 qt of TEC® Patch Additive (used at full strength).

Extended Mix:

• To fill areas deeper than 2", add 15 lb of clean saturated surface dry 3/8" pea gravel to 50 lb of BlendCrete®. First mix the BlendCrete® as outlined, then add the pea gravel and mix for 60 seconds.
• Total mixing time is not to exceed 2 - 3 minutes.
• Clean out the mixing container thoroughly after each batch to avoid getting hardened mortar into the next batch.

Application:

• The minimum ambient and surface temperatures should be 40ºF at time of application. Hot weather and conditions above 80ºF will reduce working time and accelerate set, while cold temperatures below 60ºF will have a retarding effect.
• Immediately apply the fresh mortar into the entire surface, forcing BlendCrete® firmly into the previously prepared area insuring full contact with all bonding surfaces. Slightly overfill the area.
• After initial set, using a trowel, shave BlendCrete® to the desired final profile, shaving the patch from the center towards the bond edge at the existing surfaces. A wet spray may be used for final shaping.
• In deeper areas additional lifts can be made after the original patch has reached initial set. Score and roughen the original lift layer to improve bond between applications.
• BlendCrete® can be placed in lifts up to 2" on vertical and overhead applications by holding the mortar in place until initial set has occurred.

Curing:

• Cure in accordance with American Concrete Institute procedure number 308. Protect patch from high temperature, high wind, low humidity and direct sun causing rapid drying, by covering with wet burlap or plastic for up to 24 hours.
• A water-based curing compound can also be used. Do not apply to frozen or frost covered areas.

Cleaning:

• Use water to clean all tools immediately after use.

Limitations:

• Do not overwater, retemper mix.

Coverage:

• One 22.7 kg bag yields approximately  0.01 m³ or approximately 2.1 m² at 6mm thickness
• With the addition of 6.8 kg of 10 mm pea gravel yield is approximately 0.02 m³.

• 50 lb bag
• Pails

12 months from the date of manufacture when stored in the original, unopened container, away from moisture, under cool, dry conditions and out of direct sunlight.

Store in the original, unopened container, away from moisture, under cool, dry conditions and out of direct sunlight.