properly designed and operated plant [without hand-picking or similar
operations]. However, the amount of work involved or the amount of
unsatisfactory materials required to be wasted to produce a sufficient
quantity of suitable concrete aggregate shall be the responsibility of
the Contractor, and the Government shall not be held liable for costs
resulting from such work or waste. The Contractor shall produce the
concrete aggregate from the following sites as shown in the drawings:
QUARRY SITE
BAR
TERRACE
DIST. and DIRECTION
G1
___________
___
_______
___________
__________________
G2
___________
___
_______
___________
___________________
G3
___________
___
_______
___________
___________________
b. Explorations - The deposits listed above have been explored by the
Government to determine the character and extent of the materials
available. The locations of the explorations are shown in the contract
drawings. The logs of the exploratory holes are also shown in the
drawings. Samples of materials secured are available for inspection at
[_____]. The results of explorations are furnished for information
only. These data are the result of limited explorations and tests
conducted by and for the Government and are accurate to the extent of
the scope of the investigations conducted. The Government will not be
responsible for any deduction, interpretation, or conclusion drawn
therefrom by the Contractor.]
2.2
MIXTURE PROPORTIONING
**************************************************************************
NOTE: Contact the materials engineer or the
concrete materials DM for information on filling in
the blanks.
**************************************************************************
2.2.1
All concrete mixtures will be proportioned by the Contracting Officer
[except that proportions for the slipformed facing concrete mixture will be
selected by the Contractor]. RCC shall be composed of cementitious
materials, water, fine and coarse aggregates, and possibly admixtures. The
cementitious material shall be portland cement, or portland cement in
combination with pozzolan. An admixture when approved or directed will be
a water-reducing/retarding admixture. Air-entraining admixture will be
used in the bedding concrete and other conventional concrete.
2.2.2
RCC mixtures and all conventional concrete mixtures that interface with the
RCC (such as facing concrete and bedding mixtures) will be proportioned by
the Contracting Officer [except that slipformed facing concrete mixture
will be proportioned by the Contractor]. There will be one primary RCC
mixture used for the mass of the dam [, _____,] [and _____]. The primary
mixture will contain approximately [_____] to [_____] kg pounds water,
[_____] kg pounds portland cement and [_____] kg pounds pozzolan per cubic
meter yard. [Secondary RCC mixtures requiring higher portland cement and
pozzolan contents (approximately [_____] to [_____] kg pounds per cubic
meter yard) will be used for [_____] [, _____,] [and _____].] There also
will be a "bedding mortar" and "bedding concrete." The bedding mortar is a
SECTION 03701
Page 29
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