compatible. If these values are not achieved in the first test, additional
tests shall be run using 2 percent and 4 percent of accelerator.
2.1.5
Curing Materials
Curing materials shall meet the following requirements.
2.1.5.1
Impervious Sheet Materials
ASTM C 171, type optional except polyethylene film, if used, shall be white
opaque.
2.1.5.2
Membrane-Forming Curing Compound
ASTM C 309, Type 1-D or Type 2.
2.1.6
Reinforcement
2.1.6.1
Steel Fiber Reinforcement
Steel fiber reinforcement shall meet the requirements of ASTM A 820.
2.1.6.2
Other Types of Reinforcement
[Section [_____]] [_____] for all other types of reinforcement.
PART 3
EXECUTION
3.1
PRODUCTION OF SHOTCRETE
The shotcrete shall be produced by [wet-mix process] [dry-mix process].
3.1.1
Dry Mix Process
**************************************************************************
NOTE: Delete these three paragraphs if wet-mix
process is specified.
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3.1.1.1
Batching and Mixing
Aggregate and cementitious materials may be batched by mass or by volume.
Equipment for batching by mass shall be capable of the accuracy specified
in ASTM C 94/C 94M. Volumetric equipment shall be capable of batching with
the accuracy specified in ASTM C 685/C 685M. The mixing equipment shall be
capable of thoroughly mixing the materials in sufficient quantity to
maintain placing continuity and be capable of discharging all mixed
material without any carryover from one batch to the next.
3.1.1.2
Delivery Equipment
The equipment shall be capable of discharging the aggregate-cement mixture
into the delivery hose and delivering a continuous smooth stream of
uniformly mixed material to the discharge nozzle. The discharge nozzle
shall be equipped with a manually operated water injection system (water
ring) for directing an even distribution of water through the
aggregate-cement mixture. The water valve shall be capable of ready
adjustment to vary the quantity of water and shall be convenient to the
nozzleman. The water pressure at the discharge nozzle shall be
SECTION 03371
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