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A-80 Accelerator

NON-CHLORIDE ACCELERATING ADMIXTURE FOR CONCRETE

Specco A-80C is a non-chloride, accelerating, water-reducing admixture designed to aid the placement of concrete in cold or sub-freezing temperatures. A-80C allows increased early and final strength gains formation, and can be used over a wide range of temperatures by varying the dosage. A-80C can be used to accelerate ready mix, mobile mix, block, precast and prestressed concrete, mortars, and grouts.

BENEFITS:

  • Controlled acceleration (depending on dosage).
  • Allows earlier finishing and form removal.
  • Improved workability.
  • Decreased bleeding & segregation.
  • Reduced heat protection.
  • Provides denser concrete.

COMPOSITION: Modified nitrate-based solution. A-80C does not contain any calcium chloride or intentionally added chlorides that would initiate or promote corrosion of reinforcement steel, or contribute to efflorescence.

TECHNICAL DATA: A-80 Accelerator is formulated to comply with ASTM C-494 Type C and E guidelines. A-80 Accelerator is typically dosed at 16-32 oz. per 100 lbs. of cement (1040-2080ml/100 kg) for most applications. The dosage can be increased as needed to accelerate the setting time and both early and ultimate strength gain. Specco recommends a field test or trial mix be run in order to determine the optimum dosage needed for set time and rate of strength gain requirements. The dosage will vary with jobsite temperature, air movement, concrete temperature and mass, mix design components or other admixtures, as well as heat, insulation, or wind-break protective measures used. 

DIRECTIONS FOR USE: A-80 Accelerator should be added to the batch water and aggregates, never directly to the dry cement. A-80 Accelerator contains a high range water reducer that reduces water requirements approximately 5 to12% depending on the dosage used. A-80 Accelerator is compatible with most other admixtures however they should always be added separately into the mix. For temperatures 32° F to 60° F (0º to 16° C), add A-80 Accelerator to the concrete at the rate of 16-32 oz. per 100 lbs. of cement (1040-2080ml/100 kg) depending on the rate of acceleration and strength gain required. For use in concrete block production in temperature ranges of 32 to 60° F (0º to16° C), add A-80 Accelerator at a reduced rate of 6-12 oz. per 100 lbs. of cement (390-780ml/100 kg.). For temperatures below 32° F (0° C) use warm water and heated aggregates to keep the concrete temperature above 60° F (16° C) if possible. Refer to ACI 306.1 report “Standard Specification for Cold Weather Concreting” for recommended protection methods of concrete placement in sub-freezing temperatures. For warmer temperatures above 60° F (16° C), the dosage can be reduced as needed. 

SHIPPING CLASS: ITEM 33880, SUB 2, Freight Class 55 

AVAILABLE IN: 5 Gallon (18.9 L) pails, 55 Gallon (208 L) drums, 265 Gallon (1000 L) containers.

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