Xypex Admix is added to the concrete at the time of batching. The sequence
of procedures for addition will vary according to the type of batch plant
operation and equipment.
1. READY MIX PLANT - DRY BATCH OPERATION
Add Xypex Admix in powder form to the drum of the ready-mix truck.
Drive the truck under the
batch plant and add 60% - 70% of the required water along with 300
lb. - 500 lb. (136 kg - 227
kg) of aggregate. Mix the materials for 2 - 3 minutes to ensure the
Admix is distributed evenly
throughout the mix water. Add the balance of materials to the
ready-mix truck in accordance
with standard batch practices.
2. READY MIX PLANT - CENTRAL MIX OPERATION
Mix Xypex Admix with water to form a very thin slurry (e.g. 15 lb.
- 20 lb. of powder mixed
with 3 gallons of water). Pour the required amount of material into
the drum of the ready-mix
truck. The aggregate, cement and water should be batched and mixed
in the plant in
accordance with standard practices (taking into account the
quantity of water that has already
been placed in the ready-mix truck). Pour the concrete into the
truck and mix for at least 5
minutes to ensure even distribution of the Xypex Admix throughout
3. PRECAST BATCH PLANT - PAN TYPE MIXER
Add Xypex Admix to the rock and sand, then mix thoroughly for 2 - 3
minutes before adding
the cement and water. The total concrete mass should be blended
using standard practices.
Note: It is important to obtain a homogeneous mixture of Xypex
Admix with the concrete.
Therefore, do not add dry Admix powder directly to wet concrete as
this may cause clumping
and thorough dispersion will not occur.
For further information regarding the proper use of Xypex Admix for
a specific project,
consult with a Xypex technical representative.