General

Products

Execution

Part 1 General

Scope

All work in this section shall be PATTERNED CONCRETE or equal as designated in the plans. The work shall include all labor materials, equipment and transportation required to install PATTERNED CONCRETE. The contractor for this work shall be licensed, tooled and trained by PATTERNED CONCRETE industries, Inc..

Related Work

A. Preparation work, including finish grading (rough grade should be within 1/10 of finish grade), setting forms, and furnishing and installing of reinforcing steel shall also be done by the Contractor.

B. PATTERNED CONCRETE Contractor shall also:

1. Provide materials; rebar, concrete, color hardener, sealer.(Fibermesh may be used in place of rebar)

2. Provide special patented forming tools.

3. Place concrete.

4. Apply color hardener.

5. Apply release agent.

6. Apply patented imprinting tools.

7. Buff concrete.

8. Apply sealer.

9. Perform final cleanup.

Quality Assurance

A. All PATTERNED CONCRETE work shall be installed by a PATTERNED CONCRETE Licensed Contractor who has been trained by PATTERNED CONCRETE Industries, Inc.

B. All PATTERNED CONCRETE work shall comply with the current specification and quality standards issued by PATTERNED CONCRETE Industries Inc..

C. The PATTERNED CONCRETE Contractor shall; at an additional cost, construct a field sample according to specifications to illustrate finished appearance of imprinted concrete.

Part 2 Products

Materials

A. Concrete mix Design: The concrete shall have a minimum compressive strength of 3000 PSI. Portland cement shall conform to ASTM C150, Type 1, depending on soil conditions. Aggregates, shall comply to ATM C33. Mixing water shall be fresh, clean, and potable. An air-entraining agent complying with ASTM C260 shall be used to achieve an entrained air content for the concrete mix used in accordance with the published recommendations of the Portland Cement Association and the American Concrete Institute (for freeze thaw climates) and/or a normal- set or retard-set water reducing mixture complying with ATM C494 may be used. Absolutely nothing containing calcium chloride is permitted in the mix.

B. Reinforcing Steel: PATTERNED CONCRETE recommends a minimum of 3/8 inch diameter reinforcing bars at 24 inches on center each way or the use of Fibermesh.

C. Color Hardener: The particular color shall be selected by the project representative.

D. Release Agent: Dry-shake powder to facilitate release of imprinted tools. Release agent can match color hardener or be different color to create a more variegated appearance.

Concrete Mix

Use 3000 PSI minimum compressive strength concrete. Use higher strength concrete where required by soil conditions or structural design.

Imprinting Tools

Imprinting tools shall be manufactured by PATTERNED CONCRETE Industries, Inc.

Part 3 Execution

Inspection

A. Sub-grade must be prepared according to specifications and is unfrozen and free of frost and standing water.

B. Beginning of installation means acceptance of existing conditions.

Preparation

Layout: Carefully layout form work and joints taking into consideration pattern, intended aesthetics and construction sequence.

Installation

A. Forming: Securely install forms and screeds. Assemble to permit easy stripping and dismantling without damaging concrete.

B. Reinforcement: PATTERNED CONCRETE recommends a minimum of 3/8 inch diameter reinforcing bars at 24 inches on center each way and/or Fibermesh.

C. Concrete mix shall be placed and screeded to the proper grade and wood floated to a uniform surface in the normal manner.

D. Float concrete from two directions with wood floats to create an open and uniform surface. Do not use metal floats.

E. Color Hardener: Apply 60 lbs. per 100 sq. ft. for all applications. Apply evenly in two passes using dry-shake method. Wood float after each shake.

F. Vertical Surfaces: Exposed concrete shall be left uncolored except where indicated to be colored on plans. Option for curbs, risers and planters:

1. Concrete: strip forms as soon as concrete is self supporting. Do not use form coatings that could inhibit adhesion of plaster.

2. Bonding Agents: Apply to concrete.

3. Plaster: Mix color hardener and water to proper consistence. Trowel apply at a rate of not less than 60 lbs. of hardener per 100 sq. ft. and to thickness required by depth of imprinted pattern.

G. Trowel surface with a steel or aluminum trowel; leave no trowel marks.

H. Release Agent: Apply even thin coat.

I. Imprint Pattern: While concrete is still in the plastic stage of set, the patented forming tools shall be applied to make the desired patterned surface. Comply with tool manufacture's instructions. Layout to proper alignment and imprint to a consistent depth while concrete is plastic. Hand-tool in areas where imprinting tools are not practical.

J. Control Joints: Control Joints are necessary on most patterns created by PATTERNED CONCRETE. It is possible that this process may interrupt some patterns. Your PATTERNED CONCRETE Contractor can consult with you on the best location of theses joints in order to produce the most attractive appearance with the most minimal possibilities of cracking. These control joints are to be cut or construction joints. Depth of saw cuts to be 1/4 thickness of slab. Coordinate joint locations with layout of imprinted pattern. Follow ACI/ASTM Specifications.

K. Protect concrete from premature drying, excessive hot or cold temperatures, and damage.

L. Detailing: Chip concrete "squeeze" left from tool placement.

M. Clean up: Sweep, vacuum or pressure wash surface. For an even variegated appearance, buff surface. Allow to dry.

N. Sealer: Apply PATTERNED CONCRETE approved sealer.

Tolerances

Because of the hand-crafted nature of imprinted concrete, minor variations in color, texture and pattern are acceptable.

Note to Specifiers

A specifier is with in his rights to issue a proprietary specification which names only one brand. If in the informed and professional judgment of the specifier, his client;s needs will be best served by naming a particular brand, then he has the responsibility to limit his specifications to one source. This practice is been acceptable on publicly funded projects. This principle to proprietary specifications has found legal support in the case of Whitten Corp. vs. Paddock Poll Builders, Inc.; a Federal District Court cases from Massachusetts (37l F. Supp 125). Further support came in 1975 when U.S. Supreme Court rejected further appeal or review.

PATTERNED CONCRETE^® is a registered trademark of PATTERNED CONCRETE Industries, Inc.