CEMENTITIOUS FLOOR UNDERLAYMENT

RECOMMENDED SPECIFICATION FOR ORTECRETE® “GREEN” FLOOR UNDERLAYMENT

PART 1   GENERAL

1.01     SUMMARY

A.   This is the recommended specification for Ortecrete Green Floor Underlayment.

1.02       SECTION INCLUDES

B. Ortecrete Green floor underlayment with fly ash. Fly ash is a non-combustible mineral portion of coal generated in a coal combustion power plant.

USGBC LEED Credit Areas Impacted by Orte-Crete Green Floor Underlayment

B.  Maxxon Floor Primer

C. Maxxon Overspray

1.03       QUALITY ASSURANCE

A.   Installer's Qualifications: Installation of Ortecrete Green shall be by an applicator authorized by the Maxxon Corporation using Maxxon a pproved mixing a nd pumping equipment.

1.04     DELIVERY, STORAGE AND HANDLING

A.   General Requirements: Materials shall be delivered in their original, unopened packages, and protected from exposure to the elements. Damaged or deteriorated materials shall be removed from the premises.

1.05     SITE CONDITIONS

 A.   Environmental Requirements: Before, during and after installation of Ortecrete Green, building interior shall be enclosed and maintained at a temperature above 50 degrees F (10 degrees C) and below 100 degrees F (37.7 degrees C) until structure and precast temperature are stabilized.

PART 2   PRODUCTS

2.01     MATERIALS

A.   Ortecrete Green gypsum cement: Floor underlayment compound shall be
Ortecrete Green gypsum cement underlayment as manufactured by Maxxon Corporation, Hamel , MN . All others must receive prior approval.

B.  Sand Aggregate: Sand shall be 1/8 inch (3 mm) or less, washed masonry or plaster sand, meeting requirements of Maxxon Corporation Sand Specification 101.

C.   Mix Water: Potable, free from impurities.

D.   Subfloor Primer: Maxxon Floor Primer

E.  Sealer: Maxxon Overspray

2.02     MIX DESIGNS

A.   General Requirements: Ortecrete Green mix proportions and methods shall be in strict accordance with product manufacturer recommendations.

PART 3   EXECUTION

3.01   PREPARATION

A.   Condition and Cleaning of Subfloor: Subfloor shall be structurally sound. General Contractor shall clean subfloor to remove mud, oil, grease, and other contaminating factors before arrival of the Ortecrete Green underlayment crew.

B.   Leak Prevention: Fill cracks and voids with a quick setting caulk or patching material where leakage of Ortecrete Green could occur.

C.   Priming Subfloor: Prime subfloor using the Maxxon Floor Primer. Priming instructions vary according to the porosity of the subfloor, multiple coats may be necessary.

D.   Expansion Joints: Allow joints to continue through the Ortecrete Green at the same width.

3.02   APPLICATION OF SELF-LEVELING FLOORING

A.   Scheduling: Application of Ortecrete Green shall not begin until the building is enclosed, including roof, windows, doors, and other fenestration. Install after drywall installation unless tenant finish requirements identify partitioning after the pour.

B.   Application: Ortecrete Green mix portions and methods shall be in strict accordance with product manufacturer recommendations.

C.   Drying: General Contractor shall provide continuous ventilation and adequate heat to rapidly remove moisture from the area until the Ortecrete Green is dry. General Contractor shall provide mechanical ventilation if necessary. Under the above conditions, for 3/4 inch (19 mm) thick Ortecrete Green, 5-7 days is usually adequate drying time. To test for dryness, tape a 24 inch by 24 inch (609 mm by 609 mm) section of plastic or high density rubber mat to the surface of the underlayment. After 48-72 hours, if no condensation occurs, the underlayment shall be considered dry. Perform dryness test 5-7 days after pour.

3.03   PREPARATION FOR INSTALLATION OF GLUE DOWN FLOOR GOODS

A.  Sealing: Seal all areas that receive glue down floor goods with Maxxon Overspray according to the Maxxon Corporation's specifications. Any floor areas where the surface has been damaged shall be cleaned and sealed regardless of floor covering to be used. Where floor goods manufacturers require special adhesive or installation systems, their requirements supersede these recommendations.

B.   Floor Goods Procedures: See the Maxxon Corporation's "Procedures for Attaching Finished Floor Goods to Maxxon Underlayments" brochure for guidelines for installing finished floor goods. This procedure is not a warranty and is to be used as a guideline only.

3.04   FIELD QUALITY CONTROL

A.   Slump Test: Ortecrete Green mix shall be tested for slump as it's being pumped using a 2 inch by 4 inch (50 mm by 101 mm) cylinder resulting in a patty size of 8 inches (203 mm) Ultra or minus 1 inch (25 mm) diameter.

 B.   Field Samples: At least one set of 3 molded cube samples shall be taken from each day's pour during the Ortecrete Green application. Cubes shall be tested as recommended by the Maxxon Corporation in accordance with modified ASTM C 472. Test results shall be available to architect and/or contractor upon request from applicator.

3.05   PROTECTION

 A.   Protection From Heavy Loads: During construction, place temporary wood planking over
Ortecrete Green wherever it will be subject to heavy wheeled or concentrated loads.

END OF SECTION