Fly Ash Slurry -
Fill Material
Scope:
This section governs
the furnishing of all labor, equipment, tools, and materials and the
performance of all work necessary for construction of CELL-A-FILL slurry
for filling voids.
Materials:
Material Control and
Quality:
No material shall be used until it
has been certified or tested for compliance with specifications approved
by the Engineer.
Materials:
The CELL-A-FILL slurry for use in construction of this fill shall
conform to the following requirements.
-
Fly Ash shall be
tested in accordance with ASTM C311 and shall conform to ASTM C618,
Class C fly ash.
-
Fine aggregate
shall conform to ASTM C94.
-
Mixing water
shall conform to ASTM C94.
-
Admixtures for
retarding the set or for foaming the slurry to reduce the unit
weight, can be sued with prior approval by the Engineer.
Handling, Mixing and
Proportioning:
Storage:
The fly ash shall be stored and handled in closed, waterproof containers
prior to fill. If storage bins are used, they shall be completely
enclosed. Other methods of storage are subject to the approval of the
Engineer. Fly ash that has been partially caked or set, shall not be
used.
Environmental
Limitations:
CELL-A-FILL shall be placed at
ambient air temperatures above 20°F.
Composition of the
CELL-A-FILL: CELL-A-FILL slurry mixtures shall consist of Class C fly
ash and water; or Class C fly ash, a retarder and water; or Class C fly
ash, a retarder, a foaming agent and water. The slurry, if specified by
the Engineer, shall contain line aggregate.
Mix Design Criteria:
Laboratory test specimen(s) of the CELL-A-FILL mix, combined in
proportions of the job mix design, shall be prepared and tested and
shall meet the following requirements.
|
7-Day Compressive
Strength
|
____ PSI (Min)
|
|
28-Day Compressive
Strength
|
____ PSI (Max)
|
|
Final Set ASTM C266
|
2 Hrs. Max
|
Construction Details:
The CELL-A-FILL slurry fill material shall be placed to fill the voids
and to the grades shown on the plans, or directed by the Engineer.
