15. USING A STANDARD CEMENT
MIXER
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Make sure that the inside of the
mixer is free of grease, oil, earth, wood, hardened concrete remains,
or their contaminant substances. |
 With
the mixer operating, pour in a little sand.
Without
stoping the mixer, add the amount of cement and water indicated in the
Proportions Table, and mix until a slurry of cement without lumps
has been formed (approximately 1-3 minutes).
Add
the amount of  , according to the Proportions Table, and
mix in, until obtaining a uniform mixture. The axis of the mixer should
be in an horizontal position as much as possible, in order to make the
mixing easier.
Add
the rest of the amount of sand indicated in the proportions Table.
Mix until obtaining
a pasty and homogeneous mixture.
It
is greatly important to take into consideration the material amounts
specified in the Proportions Table. THE OBTANED CONCRETE SHOULD NOT
BE LIQUID.
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