What is the main performance requirement for a curing compound under this code?

The water loss from the concrete surface shall not exceed 0.055 g/cm² after 72 hours when tested as per Appendix A (Table 1).

What are the two types of curing compounds specified in IS 12163?

Type 1 (White Pigmented) and Type 2 (Clear or Translucent, with or without fugitive dye) are specified in Clause 3.1.

What is the maximum permissible drying time for the compound?

It should set to touch in not more than 4 hours when applied to a moist concrete surface (Clause 4.2).

IS 12163

: 1987

Liquid membrane-forming curing compounds for concrete - Specification

SupersededSpecializedSpecificationMaterials Science · Admixtures and Chemical Products for Concrete

Superseded by IS 12163:1999

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This standard specifies the requirements for liquid membrane-forming compounds used for curing concrete. It covers two types (white pigmented and clear/translucent) and details performance criteria like water retention efficiency and drying time, along with testing methods.

Specified requirements for liquid membrane-forming compounds used for curing concrete to retain moisture.

Quick Reference Values

Maximum water loss at 72h0.055 g/cm²

Maximum drying time4 hours

Minimum shelf life6 months

Minimum daylight reflectance (Type 1)60 percent

Practical Notes

Ensure the concrete surface is damp but free of standing water before application for best results.

The application rate specified by the manufacturer is critical for forming an effective membrane; over-dilution or thin application will reduce curing efficiency.

White pigmented compounds (Type 1) are preferred in hot, sunny conditions as they reflect sunlight and reduce heat gain in the concrete.