Contrad

DESCRIPTION:

AT-CONTRAD is a liquid retarding admixture highly recommended to maintain the workability of concrete and control setting time for conventional concrete and RCC. AT-CONTRAD increases the setting time of cementitious mixes up to 72 hours post mixing. AT-CONTARD is a synthetically produced, specially designed water-reducing and set retarding admixture for concrete. AT-CONTARD does not contain calcium chloride or any other potential corroding elements; also it may be used in the presence of aluminum or zinc. It is compatible with air-entraining agents, water proofers and calcium chloride; care should be taken to add it separately to the mix.

STANDARDS:

• AT-CONTRAD admixture meets ASTM C 494/D and AASHTO M 194

BENEFITS:

• Easy and convenient
• Economical
• Reduces labor costs
• Reduces material costs, allowing for a cement reduction between 21 kg and 43 kg when a full 7 m3 load is batched on top of the stabilized concrete wash water (must be verified by performance testing)
• Improved profitability for the ready-mixed concrete producer
• Reduced environmental concerns pertaining to the disposal of concrete wash water and plastic concrete

FEATURES:

• PLASTIC CONCRETE
  • Retards setting characteristics
  • Improves finish ability
  • Improves workability
  • Reduces water requirement
  • Reduces segregation
• HARDENED CONCRETE
  • Increases strengths
  • Improves finished appearance
  • Reduces cracking
  • Reduces permeability
  • Non staining

RECOMMENDED APPLICATIONS:

• Pre-stressed concrete
• Concrete requiring water reduction and set time control
• Architectural concrete
• Hot weather concrete placement

COMPATIBILITY AND PRODUCT NOTES:

• CORROSIVITY – Non-Chloride, Non-Corrosive: AT-CONTRAD admixture will neither initiate nor promote corrosion of reinforcing steel in concrete. This admixture does not contain intentionally-added calcium chloride or other chloride-based ingredients.
• COMPATIBILITY:
  • AT-CONTRAD admixture can be used in combination with any ADO admixture. When used in conjunction with another admixture, each admixture must be dispensed separately into the mixture. Prior trial always recommended.
  • With air entraining agents from ADO product range used in the production of concrete resistant to freeze / thaw cycles. Fly-ash used in the production of concrete with artificial pozzolana. Form – release agents ADO product range used to help strip form work from concrete. Curing agents from ADO to protect concrete structures without form-work against quick evaporation of the mixing water.

INSTRUCTION FOR USE:

• AT-CONTRAD is normally used at a recommended dosage of 130 ml to 330 ml per 100 kg of cementitious material, depending on the application and site trial.
• Higher dosage is always recommended with prior testing and confirmation to desired performance with specific materials being used.
• AT-CONTARD should be added to the initial batch water of the concrete mixture.
• Do not dispense onto dry cement.
• Actual dosage depends on site trial.

TECHNICAL DATA (typical values):

(All technical data stated herein is based on tests carried out under laboratory condition)

PACKAGING & STORAGE:

• AT-CONTRAD is available in the following packing:
  • 20 kg & 200 kg (HDPE Container)
• Customize bigger packs on request only
• Shelf life is 12 months in sealed containers as provided
• Protect AT-CONTRAD from direct sunlight
• Keep containers sealed and away from heat and cold in a well ventilated area
• Stir material well before use

HEALTH & SAFETY:

• Protect hands with rubber gloves and eyes with goggles.
• Accidental splashes to the skin or eyes must be rinsed immediately with clean water or boric acid solution.
• Store in well-labeled containers.