Why is bitumen mastic flooring specified for LPG handling areas?

It provides a seamless, non-sparking surface, which is essential for preventing accidental ignition of flammable vapours.

What is the recommended thickness for this type of flooring?

A total thickness of 25 mm, typically laid in two layers: a 10-12 mm underlay and a 13-15 mm wearing course (Clause 6.2).

What precautions are needed during application?

Use of non-sparking tools, adequate ventilation, fire safety measures, and avoiding contact of hot mastic with water are crucial (Clause 7).

Can steel trowels be used for finishing?

No, only wooden floats or other non-sparking tools should be used for spreading and finishing to prevent spark generation.

IS 13074

: 1991

Code of practice for laying bitumen mastic flooring for industries handling LPG and other light hydrocarbon products

CurrentSpecializedCode of PracticeMaterials Science · Flooring, Wall Finishing and Roofing

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This code provides guidelines for laying bitumen mastic flooring in industrial areas where flammable products like LPG and light hydrocarbons are handled. It covers material requirements, base preparation, application techniques, and crucial safety precautions to ensure a non-sparking, durable, and chemically resistant surface.

Code of practice for laying bitumen mastic flooring for industries handling LPG and other light hydrocarbon products

Quick Reference Values

recommended total thickness25 mm

laying temperature of mastic175 to 200 °C

hardness number at 25C10 to 30

thickness of underlay10 to 12 mm

thickness of wearing course13 to 15 mm

Practical Notes

The primary purpose of this flooring is to be non-sparking; use of non-ferrous tools during laying and maintenance is critical.

Proper preparation of the concrete sub-floor, including primers, is essential for adhesion and long-term performance.

Strict temperature control of the mastic during heating and laying is vital to achieve the desired consistency and final properties.