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MAINTENANCE MANUAL
28
BEST PRACTICE – INFILL
Initial Installation
The initial installation should be performed with the low-
est sand level considered. In this instance 70% Rubber
– 30% Sand would be the initial infill ratio during installa
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tion. The intent is that we build the field, let it go through
its break in period, then assess the performance and add
any sand necessary should the field not be the desired
firmness. The premise is adding sand to adjust the firm
-
ness is relatively easy, removing sand after the fact is ex-
tremely difficult. The key is to start at the lower threshold
and slowly adjust the mix to firm up the field if necessary.
This process must be done with direct feedback from
the user groups and other various constituents. It will be
important to determine who will manage the internal user
groups and filter their information to determine direction
to Act Global.
Break In Period
The period of time required for a synthetic turf playing
surface to obtain its optimum performance level, both in
terms of athletic performance and player safety is often
referred to as the Break-In Period. The Break-In Period is
best memorialized in number of hour so use. It will not
take less than 200 hours of use and is not expected to
take longer than 500 hours of use. The synthetic turf
sports field transitions through the break-in period as the
infill settles and compacts into the depths of the grass
zone fiber. Modern day synthetic turf system providers
utilize both mechanical and manual means in an effort
to impregnate the infill deep into the grass zone fibers.
Many of the methods utilized to impregnate the infill into
synthetic turf sports field surface cause the grass zone
fibers to become electrostatically charged. This static
charge impedes the process of impregnating the infill into
the grass zone fiber. The static charge will dissipate over
time with use and rain. The break-in period concludes
once the infill fiber has settled and compacted within the
grass zone fiber
Narrative
The break-in period for a synthetic turf sports field varies.
The variables include but are not limited to; climate,
humidity, rain, surface type, face weight, type of fiber,
infill material, mixture if applicable, and significantly the
amount and type of use the surface experiences. The
length of the break-in period is best stated in the number
of hours of use.
WATER:
It should be specifically acknowledged that rain
(amount and frequency) is a significant accelerator that
contributes to reduction in the amount of time required
for the synthetic turf surface to obtain it optimum perfor-
mance level. The synthetic turf sports field can be artifi
-
cially watered through manual and/or automated means
to accelerate the break-in period, it should be noted
however that natural rain works best due to the amount
of water afforded the field and the overall consistency of
the water application across the entire surface.
USE:
The type and amount of use for each sport will
impact the time required for the synthetic turf sport field
to transition through the break-in period. Special atten-
tion should be give to ensure the traffic be uniformly
spread evenly throughout the entire surface. If the foot
and sports use traffic is concentrated in a specific area
rather than spread over the entire surface evenly the field
will experience various levels of compaction. If the field
utilization is not consistent over the entire surface the
playability of the surface can become inconsistent and
result in less than optimum playing conditions.
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