SECTION 03 35 50

SHAKE-ON CONCRETE FLOOR HARDENERS

Specifier notes: This Section contains floor hardeners designed to enhance concrete durability, increase resistance to abrasion and point loading, while minimizing long term maintenance costs. This Section contains three different types of hardeners; EMERY PLATE FF, Our top of the line, most abrasion resistant material for heavy and medium duty floors. QUARTZPLATE FF, a wear-resistant silica quartz for light and medium duty floors, also available in 8 colors, including energy saving light reflective. Each product may be used on flat and superflat floors and may be used along with SEAL HARD ( See Chemical Hardener Section.)

PART 1 - GENERAL

1.01 SUMMARY OF WORK

A. This Section specifies a premixed, ready to use shake on surface hardener for floors subjected to increased abrasion, point loading, and abuse. The material is proportioned, mixed, and packaged by the manufacturer. Each material is scientifically blended with aggregates, cementitious binders, plasticizers, water-reducing admixtures, and other proprietary ingredients.

1.02 RELATED SECTIONS

A. Section 03 30 00 - Cast in Place Concrete

1.03 REFERENCES

A. American Concrete Institute (ACI)
1. 301-89 Specification for Structural Concrete for Buildings
2. 302.1R-89 Guide for Concrete Floor and Slab Construction
3. 305 R-91 Hot Weather Concreting
4. 306 R-89 Cold Weather Concreting
B. American Society for Testing Materials
1. ASTM C 309-93 Standard Specification for Liquid Membrane-Forming Curing Compounds
2. ASTM C 1315, Standard Specification for Curing and Sealing Compounds

1.04 SUBMITTALS

A. Submit manufacturer's product data sheets on all products to be used for the work.

B. Certification stating applicator is experienced in the application of the specified product.

1.05 QUALITY ASSURANCE

A. Pre-application Meeting: Convene a pre-application meeting three weeks before the start of application of the shake-on hardener material. Require attendance of parties directly affecting the work of this Section, including Contractor, Engineer, Architect, applicator, and manufacturer representative.
B. Job Mock Up: In a location designated by the Architect, place a minimum 100 square feet floor mock up using materials and procedures proposed for use on the project. During job mock-up and initial period of installation, the manufacturer of the surface hardener will provide, at no cost, the service of a trained employee to aid in securing proper use of the product.

PART 2 - PRODUCTS

2.01 MANUFACTURER:

A. Laticrete International, Inc., 1 LATICRETE Park North, Bethany, CT 06524, 800-362-3331

2.02 MATERIALS

A. Emery Aggregate Surface Hardener: EMERY PLATE FF at a rate of 1.0 to 1.5 pounds per square foot.
B. Quartz Aggregate Surface Hardener: QUARTZPLATE FF at a rate of .75 to 1.0 pound per square foot.
C. Liquid Membrane-Forming Curing Compound: DRESS & SEAL WB 30 (ASTM C 1315) or L&M CURE R (ASTM C 309).
D. Evaporation Retardant: E-CON.
E. Semi-rigid Joint Filler, JOINT TITE 750

PART 3 - EXECUTION

3.01 CONCRETE PLACEMENT

A. Follow ACI recommendations for placement of concrete for normal or flat floors.
B. Where heavy-duty, flat or super-flat concrete floors are scheduled, provide concrete with the following additional requirements:
1. Maximum slump of five inches (5").
2. Maximum air content of three percent (3%).
3. Do not use set accelerating admixtures, such as calcium chloride.

3.02 EXAMINATION

A. Verify by examination that surfaces are acceptable to receive the shake-on floor hardener. Notify the Architect if surfaces are not acceptable to receive material.

3.03 APPLICATION

A. 1. Option One: Following the use of the highway straightedge and after bleed water has dissipated, apply up to all of the required shake-on hardener per application. Distribute evenly by use of a mechanical spreader to be assured of maintaining specified flatness values and indicated material amount. Skip to letter B if choosing this option.
A. 2. Option Two: Following the concrete leveling operation, and as soon as the concrete will support an operator and machine without disturbing the level, float the surface with a mechanical float fitted with float shoes. Following floating, apply up to 2/3 of the total amount of the hardener with a mechanical spreader to assure uniform application. Do not apply dry shake onto surface when bleed water is present. Once the shake has absorbed sufficient moisture (indicated by darkening of the material), apply remainder of the shake. Do not apply dry shake on concrete surface when bleed water is present. Use L&M E-CON, evaporation retardant, to eliminate surface crusting.
B. Use finishing machines to compact surface by a third mechanical floating it time and setting characteristics will allow. Use E-CON to reduce plastic shrinkage cracks.
C. As surface further stiffens, hand or mechanically trowel with raised blades to desired finish. Remove all marks and pinholes.

3.04 CURING

A. Cure finished floors using approved by hardener manufacturer. Cure per manufacturer recommendations

3.05 CONTROL JOINTS

A. Form or saw cut control joints as soon as the surface permits the weight of the saw without causing topping edges to ravel.
B. After concrete has fully cured, fill joint wells with JOINT TITE 750, as two-component, polyurea control joint filler, according to manufacturer's recommendations.

3.06 PROTECTION:

A. Cover floors and keep free of traffic and loads for a minimum of seven days after completion.

END OF SECTION - 03 35 50