What are the two grades of mastic specified in this code?

The code specifies Grade I (harder) and Grade II (softer, with higher binder content) (Clause 4).

What is the recommended thickness for this type of flooring?

A thickness of 25 mm is generally recommended, which can be laid in one or two layers (Annex A.3.1).

Why is this type of flooring used in LPG handling industries?

It provides a jointless, dust-free, and non-sparking surface which is essential for safety in areas with flammable products.

What is the required hardness for Grade I mastic?

The hardness number at 25°C should be between 40 and 100 (Table 3).

IS 13026

: 1991

bitumen mastic for flooring for industries handling LPG and other light hydrocarbon products

CurrentSpecializedSpecificationBIMMaterials Science · Flooring, Wall Finishing and Roofing

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This standard specifies the requirements for two grades of bitumen mastic used for flooring in industries handling LPG and other light hydrocarbon products. It covers the material composition, physical properties like hardness and binder content, and methods for testing. The standard provides guidance to ensure a durable, spark-proof, and chemically resistant flooring surface suitable for hazardous environments.

bitumen mastic for flooring for industries handling LPG and other light hydrocarbon products

Quick Reference Values

Binder Content (Grade I)14% to 17% by mass

Binder Content (Grade II)17% to 20% by mass

Hardness Number at 25°C (Grade I)40 to 100

Hardness Number at 25°C (Grade II)10 to 40

Recommended Application Thickness25 mm

Maximum Heating Temperature200 °C

Practical Notes

This mastic provides a monolithic, spark-proof surface, a critical safety feature in environments with potentially explosive atmospheres.

Grade II mastic, being softer and richer in bitumen, offers better resistance to light hydrocarbon spillage compared to the harder Grade I.

Proper heating and mixing on-site as per Clause 5 are crucial to ensure the homogeneity and performance of the final laid floor.