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All material placed as fill shall consist of material classified by ASTM D
2487 as GW, GP, GC, GM, SP, SM, SC, CL, ML, or SW. The material shall be
free of ice; snow; frozen earth; trash; debris; sod; roots; organic matter;
contamination from hazardous, toxic or radiological substances; or stones
larger than 3 inches in any dimension. Each material shall be obtained
entirely from one borrow source, unless the Contracting Officer determines
that quality control is adequate and the alternate source produces material
that is similar in gradation, texture, and interaction with the
reinforcement. The Contractor shall supply any testing required by the
Contracting Officer to evaluate alternate sources. All materials shall be
of a character and quality satisfactory for the purpose intended.
a. Drainage Aggregate shall meet the requirements of [ASTM D 448, size
No.7].
b. Aggregate Base material for the wall leveling pads shall meet the
requirements of [ASTM D 1241, gradation C].
c. Reinforced Fill. Soil placed in the reinforced fill zone shall
consist of [granular material with less than [5][15] percent passing
the 75 m No. 200 sieve].
c. Retained Fill. Soil placed in the retained fill zone shall [meet
the minimum requirements above].
2.5
MASONRY ADHESIVE
The masonry adhesive shall meet the following requirements:
a.
ASTM C 920, Type S, Grade NS, Class 25
b.
expected 30 year life
c.
meet the recommendations of the block manufacturer
2.6
DRAINAGE PIPE
The drainage pipe shall be corrugated polyethylene pipe meeting
requirements of AASHTO M 252.
PART 3
EXECUTION
3.1
CLASSIFICATION OF SOIL MATERIALS
Classification of soil materials shall be performed by the Contractor in
accordance with ASTM D 2488. The Contracting Officer reserves the right to
revise the Contractor classifications. In the case of disagreement, the
Contracting Officer's classification will govern unless the soils are
classified in accordance with ASTM D 2487. All testing completed by the
Contractor in conjunction with soil material classification will be
considered incidental to the contract work.
3.2
EARTHWORK
The leveling pad and reinforced fill zone shall bear on undisturbed native
soils, or acceptably placed and compacted fill. In the event that it is
necessary to remove material to a depth greater than specified or to place
fill below the leveling pad not otherwise provided for in the contract, the
Contracting Officer shall be notified prior to work and an adjustment in
SECTION 02832
Page 20
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