Isle CellCrete Specifications

             PART 1 - GENERAL            

1.1

SCOPE: Provide lightweight cellular concrete (LCC) where indicated on the drawings.

1.2

QUALITY ASSURANCE:

A.

Use only experienced applicators, licensed or approved by the LCC manufacturer.

B.

Use mixing and pumping equipment approved by the LCC manufacturer.

1.3

SUBMITTALS: Submit the following items in accordance with SUBMITTALS section.

A.

Manufacturer’s product data, including test results for compressive strength and of density.

B.

Written proof of manufacturer’s approval of applicator.

C.

Record of field tests for slump and plastic density

D.

Lab tests on field samples for compressive strength and oven-dry density.

1.4

DELIVERY:

A.

Deliver LCC premixed in ready-mix truck. The manufacturer will add the foam to the mixer at the jobsite or at the plant.

B.

Schedule delivery to prevent delay of placing LCC after all ingredients are mixed. Maximum lapse time; 90 minutes. No retempering allowed, except under the direction of the manufacturer’s representative.

C.

Remove deteriorated material from the site.

1.5

ENVIRONMENTAL CONDITIONS:

A.

Where LCC is exposed to weather, do not apply during rain.

B.

Provide adequate ventilation until LCC underlayment is dry.

...

           PART 2 - PRODUCTS           

2.1

MANUFACTURER: Island Ready-Mix Concrete, Inc., Kapolei, Hawaii

2.2

MATERIALS: As determined by the LCC manufacturer to meet specified requirements.

A.

Isle CellCrete, a structural lightweight cellular concrete composed of cement, clean salt free sand, foaming agent, clean water and fiber reinforcement to provide the following minimum requirements:

1)

Compressive Strength: (ASTM C 495-91a) 1,500 psi at 28 days

2)

Oven dry density: 105 pcf +/- 5 pcf at 28 days.

2.3

MIXING PROPORTIONS: As determined by the LCC manufacturer to meet specified requirements.

           PART 3 - EXECUTION        

A.

Removed all construction debris and extraneous material from interior of forms.

B.

Make sure form coatings are properly applied prior to placement of the LCC.

C.

Place LCC on clean surfaces with no free water present.

A.

Slump Tests: ASTM C 143-90a, 10" +/- 2".

B.

Plastic Density: Test for plastic density just before final placement of LCC in accordance with ASTM C 796-87a and record results.

C.

Field samples for Lab Testing: Make cylinder samples in accordance with ASTM C 495-91a and deliver to a testing lab selected by the Architect or Structural Engineer as follows:

1)

2)

A.

Concrete shall be conveyed from mixer to place of final deposit by chuting, pumping or pneumatically conveying to insure a practically continuous flow of LCC.

B.

Do not allow LCC to drop freely more than 6 feet.

C.

Keep open troughs and chutes clean and free from coatings of hardened LCC.

3.4

DEPOSITING:

A.

Deposit LCC in its final location as rapidly as possible.

B.

Do not place LCC during rain. Protect fresh LCC from rain until it reaches its initial set.

C.

Do not extensively shovel LCC into position or use vibrators to transport or consolidate LCC inside the forms.

A.

Bring slab surface to correct level by screeding.

B.

CURING: Cure in accordance with manufacturer’s instructions.

A.

Protect finished work as required to prevent damage or deterioration.

B.

Do not permit traffic over unprotected surfaces.

CLEANUP: After completion of work, clean excess materials from walls and all surfaces so defaced. Remove all excess materials and scrap from the job and leave all surfaces neat and clean.