Linolit SL 330, Инструкция по эксплуатации

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5.10. CONCRETE HARDNESS TESTING
Different types of concrete are characterized by their
compressive strength; different countries use various
indicators to evaluate the compressive strength (e.g.
pounds/square inches and MPA). Generally, if the
compressive strength is higher, the concrete is harder, and it
is harder to grind it.
In addition to compressive strength, there are other factors
that affect the hardness of the floor and therefore determine
the selection of abrasive pad. Most often when talking about
grinding and polishing, this refers to the upper layer (5
mm). Concrete surface treatment and the condition of
concrete surface have much bigger impact on the selection
of abrasive segment than the compressive strength.
Surface characteristics, important for the selection of
abrasive pads.
5.11. SELECTION OF ABRASIVE PADS
Usually, if the concrete surface is very smooth (e.g. in the
case of intense polishing/smoothing of the floor), the concrete
characteristic will be high compressive strength, and to
process it you will need to use the segment with a soft bond.
In the opposite case, if the concrete surface is very
rough/coarse (e.g. under the influence of rain, bumps,
chopping etc.), the concrete characteristic will be low
compressive strength, and to process it you will need to use
the segment with a hard bond. Presence of surface
coating/contamination (e.g., epoxy coatings, ceramic tile
adhesives, leveling compounds/smoothers) often have much
bigger impact on the selection of abrasive segment than the
compressive strength.
When grinding concrete tiles for the first time, if you are
not sure about the hardness of concrete, start processing by
using abrasive tools with harder bond. This will ensure
minimal wear of abrasive segments. Even if the hard
abrasive segment is not appropriate, all the damage is in a
loss of a small amount of time, without the wear of abrasive
tools.
In the opposite case (e.g. using first abrasive tools with soft
bond), if the concrete is soft and has a rough or coarse
surface, there is high probability of fast wear of a
significant number of abrasive tools.
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