Nit(LAF)

DESCRIPTION:

AT-NIT (LAF) is an alkali-free, shotcrete admixture in liquid form for application of spraying concrete.

APPLICATION:

• AT-NIT (LAF) is suitable for the application as accelerator for setting in the dry process of spray as well as the wet process of spraying. The main application of AT-NIT (LAF) is in the following areas:
  • Safety of propulsion, rock and slope safety, high volume spraying concrete for construction.

EFFECT:

• The effect of the accelerator on setting time is dependent on the content of cement, age of cement, temperature inside the tunnel, process of spraying etc.

ADVANTAGES:

Following arguments specially distinguish AT-NIT (LAF) as catalyser of spraying concrete :

• Free from alkali?
• Good long term strength and durability
• In case of proper application, minimum loss of solidity of the catalysed concrete
• Reduction of rebound
• Improved adhesion of the sprayed concrete on rock and concrete
• Improved adhesion in the over head crown portion
• Clear reduction of dust and a good working environment
• Free from chloride and does not attack reinforcement

DOSAGE:

• The entire dosing is to be ascertained in pre-trial. For strengthening of the layer (or coating) up to approx 15 cm. In case of single charge, it is in the range of 3% to 6% of the content of binding agent. The dosing of AT-NIT (LAF) is followed by a pump of crush (or squeeze) hose e.g. Aliva Al-403. An optimal nozzle and mixing must be guaranteed with the quality of demand.

APPLICATION TEMPERATURE:

• For shooting a thicker layer particularly on to the crown, the temperature should not be less than15°C.

IMPORTANT INSTRUCTION:

• Before the dispensing of AT-NIT (LAF) in spraying machine, please note that all the hoses and dispensing tank should be thoroughly cleaned and make sure that normal sodium silicate based liquid accelerator is not present.

TECHNICAL DATA

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

• AT-NIT (LAF) is available in the following pack:
  • 275 kg barrel
• Shelf life is 6 months in sealed containers as provided (temperature between +5°C and +35°C)
• Keep containers sealed and away from heat and cold in a well ventilated area

HEALTH & SAFETY:

• Use goggles, mask, nose cover and hand gloves during application.
• Clean hands with warm soap water after application.
• Avoid contact with skin / eyes.
• In case of unlikely contact with eyes, rinse immediately with plenty of clean water, then cleanse
  with soap and lukewarm water and seek medical advice.
• Do not use solvent to clean the contacted area.
• Ensure adequate ventilation and avoid inhalation of vapours as some people are sensitive to resins,
  hardeners and solvents.
• If swallowed seek medical attention immediately. Do not induce vomiting.
• Store in well-labeled containers.