Edit bracketed items as appropriate.
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The batching and mixing plant shall be located [on project site as
indicated on the drawings] [off Government premises no more than 15 minutes
haul time from the placing site]. There shall be operable telephonic or
radio communication between the plant and the placing site at all times
concreting is taking place.
1.12.1.2
Type and Capacity of Batching and Mixing Plant
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NOTE: Edit as appropriate. Plant capacity should
be governed by the laydown pattern or the size of
the job to prevent delay of paving operations.
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The batching and mixing plant shall be a stationary-type central mix plant.
The plant shall be designed and operated to produce concrete within the
specified tolerances, and shall have a capacity of at least 200 cubic
meters 250 cubic yards [_____] per hour. The batching and mixing plant
shall conform to the requirements of NRMCA QC 3 including provisions
addressing:
1.
Material Storage and Handling
2.
Batching Equipment
3.
Central Mixer
4.
Ticketing System
5.
Delivery System
1.12.1.3
Batching Tolerances
The following tolerances shall apply.
Percentage of Required
Materials
Mass
____________
_________
Cementitious Materials
plus or minus 1
Aggregate
plus or minus 2
Water
plus or minus 1
Admixture
plus or minus 3
For volumetric batching equipment for water and admixtures, the above
numeric tolerances shall apply to the required volume of material being
batched. Concentrated admixtures shall be uniformly diluted, if necessary,
to provide sufficient volume per batch to ensure that the batchers will
consistently operate within the above tolerance.
1.12.1.4
Moisture Control
**************************************************************************
NOTE: Edit as appropriate for project. Electric
moisture meters should be required for large paving
jobs.
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The plant shall be capable of ready adjustment to compensate for the
varying moisture contents of the aggregates and to change the quantities of
the materials being batched. [An electric moisture meter complying with
SECTION 02753
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