The Universal Selection Source: Adhesives Ingredients

Formulation

Epoxy Compound for Patching and Surfacing Exterior Concrete by Momentive

Applicable Base Polymer
Applicable Industrial Sectors

Typical Formulation Ingredients

Phase
Ingredient
Parts by weight
Epoxy resin (Epon 8131, Momentive) 
   
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    Curing agent (Epikure 3071, Momentive) 
       
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    C (Aggregate Portion): 
    Silica sand (see “Tips and Tricks”) 
       
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    Typical Properties

    Properties
    Viscosity of binder at 25°C, cps 
       
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    Pot life at 25°C of 1 quart, hrs 
       
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    Expected working life at 25°C, hrs 
       
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    Tensile strength, psi 
       
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    Tensile bond strength, psi to Dry Concrete: 
       
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    Tensile bond strength, psi to Damp Concrete: 
       
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    Tensile bond strength, psi to Aged Concrete: 
       
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    Processing

       
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  • Applicable Base Polymer Properties

    Because of their thermosetting molecular structure, epoxy adhesives exhibit excellent tensile-shear strength but poor peel strength unless modified with a more resilient polymer. Epoxy adhesives offer excellent resistance to oil, moisture, and many solvents. Low shrinkage on curing and high resistance to creep under prolonged stress are characteristics of many high quality epoxy adhesives. Epoxy resins have no evolution of volatiles during cure and are useful in gap-filling applications.

    Resulting Properties

    This sand-filled formulation illustrates the use of flexibilizing epoxy resins to impart thermal compatibility with exterior concrete applications including patching of slab and joint spalls, skid-proofing loading docks and ramps, crack sealing and waterproofing, grout bonding of pre-cast concrete supports, and grouting of recessed electrical wiring, posts, tie-down fixtures, etc. Compliance with requirements of ASTM specification C-881, Type lll, Class C is indicated by test data developed from this formulation.

    Source: Momentive

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