This standard specifies laboratory test methods for evaluating the performance of adhesives used for structural bonding in concrete repair. It covers key properties like pot life, tensile and shear bond strength, compressive strength, and water absorption to ensure the suitability of bonding agents.
Prescribes methods of test for adhesives used for structural bonding in concrete structures.
Quick Reference Values
Test specimen curing temperature27 ± 2 °C
Test specimen curing relative humidity65 ± 5 percent
Specimen size for Tensile Bond Strength test40 mm cube bonded to another 40 mm cube
Rate of loading for Tensile Bond Strength test1.4 N/mm²/min
Rate of loading for Shear Bond Strength test14 N/mm²/min
Test specimen for Compressive Strength test25 mm cube
Key Formulas
Tensile Bond Strength (N/mm²) = P / A (where P is the failure load in N, and A is the bonded area in mm²)
Shear Bond Strength (N/mm²) = P / A (where P is the failure load in N, and A is the sheared area in mm²)
Practical Notes
The test results, particularly bond strength, are highly sensitive to the surface preparation of the concrete substrate. Ensure the substrate is clean, dry, and properly roughened as per manufacturer recommendations.
Pot-life (Clause 4) is a critical parameter for site execution. It determines the usable time window for applying the mixed adhesive before it starts to harden.
This standard provides the 'how-to' for testing but does not provide acceptance criteria. Minimum required performance values must be sourced from project specifications or the material manufacturer's data sheet.