First, mortar self-leveling wear testing machine
principle
Reference to this instrument
GB 1768
When the surface of the product is rubbed against the sanding wheel to a specified number of revolutions, the amount of wear on the surface of the product is measured.
Second, mortar self-leveling wear testing machine
Test piece preparation
Pour the prepared sample into the wear-resistant test mold without vibration.
24h
After demolding, continue to place under standard conditions
27d
After the measurement.
Third, mortar self-leveling wear testing machine
Grinding wheel production
a
) will be brown corundum
P60
Dry matte cloth cut with rubber wheel thickness specifications;
b
Applying the cut abrasive cloth to the rubber wheel with a polyvinyl acetate emulsion, and directly bonding if it is a self-adhesive abrasive cloth;
c
) Ensure that the joints of the abrasive cloth should not overlap or sew, and each abrasive cloth can only be used once. The replacement of the test pieces must be replaced;
d
) Place the grinding wheel after the abrasive cloth is placed under standard test conditions
24h
Above spare.
Fourth, mortar self-leveling wear testing machine
experiment procedure
a
) Wipe the surface of the test piece with a gauze gauze and weigh it to the nearest
10mg
.
b
The surface of the test piece that is in contact with the air is mounted upward on the abrasion tester, and the grinding wheel is mounted on the bracket, and a weight is added to each grinding wheel.
500g
Condition wants to wear out
100r
Remove the test piece, remove the surface ash and weigh it.
C
Each test piece is tested once, and the average value of the two test pieces is taken as the test result, accurate to
10mg
. The relative error of the two test pieces shall not be greater than
5%
Otherwise, it should be retested.
Wear resistance calculation
Wear resistance calculation by type (
2
) Calculation:
F=G 0 -G 1
(
2
)
In the formula:
F----
Wear value in grams (
g
)
G 0---
The quality of the specimen before grinding, the unit is gram (
g
)
G 1---
The quality of the specimen after grinding, the unit is gram (
g
)
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