02331Lightweight Cellular Concrete Fill

LIGHTWEIGHT CELLULAR CONCRETE FILL

PART 1 GENERAL

1.1SECTION INCLUDES

1.2RELATED SECTIONS

1.3REFERENCES

Using Preformed Foam

1.4DEFINITIONS Not Used

1.5SUBMITTALS

Include the following:

cellular concrete fill contractor to satisfactorily prepare and place lightweight cellular concrete fill.

with the placement of lightweight cellular concrete in similar applications.

successfully placed by the proposed project foreman.

least the following:

Lightweight Cellular Concrete Fill

compatibility from the foaming agent manufacturer

ASTM C 495.

report compressive strength to the nearest 1 psi.

testing will occur, for information.

manufacturer.

manufacturer and details on construction of fill placement along slopes.

reduce the risk of freezing of uncured materials, prior to placement of subsequent lifts.

1.6ACCEPTANCE

lightweight cellular concrete fill per each 300 cubic yards placed, but no fewer than one set per each day of placement.

pockets after filling approximately half of each cylinder and then again once each cylinder is full.

Lightweight Cellular Concrete Fill

accordance with ASTM C 495; report compressive strength to the nearest 1 psi.

lightweight cellular concrete fill is below the specified 28-day compressive strength or above the specified cast density.

quantity of lightweight cellular concrete fill represented by the non- conforming test results.

Table 1 Price Reduction for 28-Day Compressive Strength PSI Below Specified Strength Pay Factor 1 to 5 0.9 6 to 10 0.7 More than 10 Reject* * The Engineer may accept a “reject” lot based on an engineering analysis that demonstrates that the compressive strength is adequate to serve the design purpose. The Department applies a 0.5 pay factor if a reject lot is allowed to remain in-place. Table 2 Price Reduction for Cast Density Above Specified Cast Density Pay Factor 4 to 10% 1.0* 11 to 20% 0.7* More than 20% Reject* * Increases in density may have significant impact to the design intent. Any lot with a cast density test 4 percent or more above the specified cast density will require an engineering analysis to determine if the density is adequate to serve the design purpose. The Department applies pay factors as specified if the lot is allowed to remain in-place. The Department applies a 0.5 pay factor if a reject lot is allowed to remain in-place.

Lightweight Cellular Concrete Fill

PART 2 PRODUCTS

2.1CLASSES

class shown. Table 3 Lightweight Cellular Concrete Fill Classes Maximum Cast Minimum 28-day Compressive Strength Class Density* according to ASTM C 495

II 30 40 III 36 80 IV 42 120 V 50 160 VI 80 300 * Weigh cylinders before compressive strength testing and include weight and calculated density in the testing report.

2.2MATERIALS

PART 3 EXECUTION

3.1PREPARATION

loose material and to be of uniform moisture.

before placing material.

Lightweight Cellular Concrete Fill

forecast to stay above 32 degrees F for a period of 12 hours immediately after placement.

Engineer may authorize an appropriate cold weather protection plan if the ambient air temperature is forecast to stay above 28 degrees

3.2PLACEMENT

by the foam manufacturer.

according to foam manufacturer if their recommended maximum lift thickness is less than 3 ft.

materials as shown.

otherwise compromised from the previously poured surface.

3.3PROTECTION

cause degradation or otherwise impact its properties and performance, including precipitation, inclement weather, and excessive moisture absorption

lightweight cellular concrete fill until the specified 28-day compressive strength has been attained.

lightweight cellular concrete before operating any earthwork equipment over the area.

to earthwork or other operations.

END OF SECTION

Lightweight Cellular Concrete Fill