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DESCRIPTION : PENETRON ADMIX® SB (Soluble Bag integral crystal-
line waterproofing admix) is added to the concrete mix
at the time of batching. PENETRON ADMIX® SB
consists of Portland cement and various active, propri-
etary chemicals. These active chemicals react with the
moisture in fresh concrete and with the by-products of
cement hydration to cause a catalytic reaction, which
generates a non-soluble crystalline formation
throughout the pores and capillary tracts of the
concrete. Thus, the concrete becomes permanently
sealed against the penetration of water or liquids from
any direction. The concrete is also protected from
deterioration due to harsh environmental conditions.
PENETRON ADMIX® SB has been specially formulated to meet varying project
and temperature conditions (see Setting time and strength). Consult with a
Penetron technical representative for additional
detailed support on your project.
Reservoirs
Sewage and water treatment plants
Secondary containment structures
Tunnels and subway systems
Underground vaults
Foundations
Parking structures
Swimming pools
Precast, cast-in-place and shotcrete applications
DIRECTIONS FOR USE
Dosage rate:
PENETRON ADMIX ® SB is designed to be dosed at the rate of one soluble bag per cubic yard (or cubic meter) of concrete. For most mix designs in use, this falls within the range of acceptability of 1% by weight of cement. Consult with Penetron’s Technical Department for assistance in verifying the appropriate dosage rate and for further information regarding enhanced chemical resistance and optimum concrete performance for your project.
Mixing:
PENETRON ADMIX® SB must be 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. The following are some typical mixing guidelines. For more detailed information on dosing procedures, contact your Penetron representative.
Ready mix plant - Dry batch operation:Add PENETRON ADMIX® SB
directly into the drum of the ready-mix truck and immediately before
charging the drum with 60%-70% of the required mix water, along with
300-500 lb (136-227 kg) of aggregate. Mix the materials for 2-3 minutes to
ensure the PENETRON ADMIX® SB is distributed evenly throughout the
mix water. Add the balance of materials to the ready-mix truck in accor
dance with standard batching practices.
Ready mix plant - Central mix operation: Ideally, PENETRON ADMIX® SB
should be added directly into the central mix drum before all other ingredients.
However, when this is impractical or unsafe, PENETRON ADMIX®
SB can be added directly into the drum of the ready-mix truck immediately
before charging with concrete. The dosed concrete should be allowed to
mix in accordance with ACI guidelines or for a minimum of 70 revolutions
at standard mixing speeds (approximately 5 minutes) to ensure even distribution
of PENETRON ADMIX® SB throughout the concrete.
Precast batch plant: Consult with a Penetron technical representative to
determine if PENETRON ADMIX® SB would suit your precast batch plant
operation or if one of our other packaging solutions may be more appropriate.
NOTE: It is important to obtain a homogeneous mixture of PENETRON
ADMIX® SB with the concrete. For further information regarding the
proper use of PENETRON ADMIX® SB for a specific project, consult with a
Penetron technical representative.
Setting time and strength:
The setting time of concrete is affected by the chemical and physical
composition of ingredients, temperature of the concrete and climatic
conditions. Retardation of set may occur when using PENETRON ADMIX®
SB. The amount of retardation will depend upon the concrete mix design and the dosage rate of PENETRON ADMIX® SB.
However, under normal conditions, PENETRON ADMIX® SB will provide a normal set concrete.
Concrete containing PENETRON ADMIX® SB may develop higher ultimate
strengths than plain concrete. Trial mixes should be carried out under
project conditions to determine setting time and strength of the concrete.
Concrete treated with PENETRON ADMIX® SB should be placed and
finished in accordance with good concrete practices. ACI guidelines and
recommendations should be observed.