What are the different types of epoxy systems in IS 12384?

Four types: Type I (Grout), Type II (Mortar), Type III (Screed), and Type IV (Coating), based on their intended application (Clause 4).

What is the minimum compressive strength for a Type II structural repair mortar?

The 7-day compressive strength should be a minimum of 70 N/mm² (Table 1).

What is the requirement for bond strength?

The bond strength to the concrete substrate must be greater than the cohesive strength of the concrete itself, meaning the concrete should fail before the bond line (Table 1).

What is 'Pot Life' according to this standard?

It is the period of time during which the mixed epoxy resin system remains usable and can be properly applied (Clause 3.1.8).

IS 12384

: 1988

Epoxy resin based system for protection and repair of concrete surfaces - Specification

CurrentSpecializedSpecificationMaterials Science · Admixtures and Chemical Products for Concrete

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This standard specifies the requirements for four types of epoxy resin-based systems used for the protection and repair of concrete surfaces. It covers material properties like pot life and gel time, as well as performance characteristics such as compressive strength, bond strength, and chemical resistance. The standard classifies the systems as Grout (Type I), Mortar (Type II), Screed (Type III), and Coating (Type IV).

Specifies requirements for epoxy resin-based systems for protecting and repairing concrete surfaces.

Quick Reference Values

Min Compressive Strength (7 days) for Type II Mortar70 N/mm²

Min Bond Strength to Concrete SubstrateGreater than cohesive strength of concrete

Pot Life at 30°C for Type I Grout30 min

Gel Time at 30°C for Type I Grout40 min

Water Absorption (24h)Max 0.5% by mass

Practical Notes

This standard has been marked as 'WITHDRAWN' by BIS. Users should refer to manufacturer specifications and potentially newer, more specific codes for current best practices.

The choice between Type I, II, III, and IV systems depends entirely on the application, ranging from crack injection to heavy-duty flooring.

Pot life and curing times are extremely sensitive to ambient temperature and humidity; always consult manufacturer data sheets for site-specific conditions.