CHEMAX ARBOND

CHEMAX ARBOND is a modified acrylic emulsion specially designed for use as a bonding aid and gauging liquid for cementitious systems.

It is resistant to hydrolysis and can therefore be used for external applications. CHEMAX ARBOND is the recommended primer for the CHEMAX PRIMER cementitious repair system.

Uses: Recommended primer for CHEMAX cementatious repair system. For improving and bonding floor toppings, renders and mortars; repair of worn, damaged or spalled concrete; polymer modified floor screeds.

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Chemax-ARBOND

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Advantages
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Convert

Simply brush onto concrete as a primer. Single component, gauged as required.

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Increased strength

Improves tensile and flexural

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High Adhesion

Provides excellent bond to concrete, masonry, stone work plaster and block board.

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Properties of Mortar

Allows thin section applications.

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Versatile

  Compatible with all common hydraulic cements

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Economical

 Economical to use

Mechanical Properties
Mechanical propertiesCuring conditionControlCHEMAX ARBOND
Compressive strength (N/mm2)Dry
Wet		35
30		40
30
Tensile strength (N/mm2)Dry
Wet		4.0
3.0		4.5
3.5
Flexural Strength (N/mm2)Dry
Wet		8
7		11
9
Adhesion to concrete Slant
shear bond (N/mm2)		Dry520
Specification Clauses
Application

Instructions

  • Surface Preparation : The object of the surface preparation is to achieve a clean sound surface with a good mechanical key. All substrates should be cleaned and free of dust, plaster, oil, paint, grease, corrosion deposits, and any other deleterious substances. Laitance should be removed by mechanical means. Oil or greasy deposits should be removed by suitable means. All surfaces so treated should be thoroughly washed with clean water. Smooth substrates must be mechanically roughened e.g. by scabbling, needle gun or grit/ sand blasting to provide an mechanical key.
  • Concrete Repairs : Any reinforcing steel in the repair area should be exposed around its full circumference and cleaned to remove all loose scale and corrosion deposits and then primed with CHEMAX Primer. Remove all surface dust and debris
  • Priming : Immediately before priming, the concrete substrate should be thoroughly dampened with water and any excess being brushed off. Scrub CHEMBRIDGE AR into the substrate. Avoid pudding of the emulsion. The repair mortar/topping should be applied whilst the primer is still tacky. However a satisfactory bond can be achieved up to 15 mins. After application at 300C.
  • Typical Mix designs to modify mortars :
    OPC : 50 kg
    Zone 2 sand : 150 kg
    CHEMAX ARBOND : 8 - 10 liters
    Water : Add sufficient water to give required consistency

Note : Trials are recommended to optimize mix designs. General recommendations for repairs Prepare surfaces thoroughly as previously recommended Cut back edges to avoid feather edging, Prime all surfaces including edges, using CHEMAX ARBOND.

All applications shall be wet on wet. For best results CHEMAX ARBOND should be allowed to become tacky. If the bonding agent is allowed to dry for more than 15 minutes at 30 C initial ‘grab’ to the repair mortar will be reduced. Therefore, the use of temporary shuttering is recommended. Water content of the Mortar should be kept to the minimum necessary. For consistent results, the use of clean, dry sand is recommended. Where the use of wet sand is unavoidable, the quality of water to be added must be reduced.

Cure mortars using CHEMAX ARBOND to prevent rapid drying out. Protect uncured mortar from frost and rain. Do not retemper mortar after initial set. Minimum application temperature for CHEMAX ARBOND is 10 C, but the mortar should not be applied if the temperature is expected to fall. For permanently immersed conditions consult Local CHEMAX office.

Limitations

  • As a bonding agent : CHEMAX ARBOND may exhibit less overlay time at higher temperature. In such cases as overlay mortar shall not be applied when CHEMAX ARBOND is totally dry. CHEMAX ARBOND when used as bonding agent cannot act as a barrier coat against ingress of chloride ions from the substrate.
  • Equipment Cleaning : Immediately after use, wash all tools with clean water.

Estimating

  • Packaging : CHEMAX ARBOND is supplied in 1, 5, 20 & 200 liter plastic containers
  • Coverage : Approximately 6 - 8m2/ liter depending on substrate
  • Shelf life : 12 months at 300C. CHEMAX ARBOND should be protected from frost.

Precautions

  • Health & Safety instructions : CHEMAX ARBOND is non toxic. However it should never be ingested and if it comes into contact with eyes, wash immediately with plenty of water and seek medical treatment. CHEMAX ARBOND is slightly alkaline. Skin contact should be avoided. Gloves and protective clothing should be worn.
  • Fire : CHEMAX ARBOND is non flammable
    Flash point : 480C
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