IS 12118:2001 Part 3 is the Indian Standard (BIS) for methods of test for repair materials for concrete structures - part 3: adhesives for structural bonding. 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.
Overview
- Status
- Current
- Usage level
- Specialized
- Domain
- Materials Science — Demolition, Renovation and Repair of Structures
- Type
- Testing Method
Also on InfraLens for IS 12118
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.
Frequently referenced clauses
concreteadhesivesepoxyrepair materialsbonding agents
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values6
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)
Tables & Referenced Sections
Key Clauses
Clause 4 - Determination of Pot-Life
Clause 5 - Determination of Tensile Bond Strength
Clause 6 - Determination of Shear Bond Strength
Clause 7 - Determination of Compressive Strength of Adhesive
Clause 9 - Determination of Heat Deflection Temperature
Frequently Asked Questions4
What is the primary purpose of IS 12118 (Part 3)?+
It provides standardized methods to test the physical and mechanical properties of adhesives (like epoxies) used for structurally bonding new materials to old concrete.
Does this standard specify minimum acceptable bond strength?+
No, it only specifies the method of testing. Acceptance criteria are typically defined in project specifications or by the structural consultant.
What is the difference between the tensile bond test and shear bond test in this standard?+
The tensile bond test (Clause 5) measures the pull-off strength, while the shear bond test (Clause 6) measures the strength against sliding forces along the bond line. Both are crucial for evaluating structural integrity.
What is 'pot-life' and why is it important?+
Pot-life (Clause 4) is the period of time during which a multi-component adhesive remains usable after mixing. It's critical for planning the application process on site.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.