What is the primary application of pipes manufactured under IS 4350?

They are used for sub-surface drainage (under-drainage) to lower the groundwater table in fields, behind retaining structures, or beneath roadways.

How is the performance of the pipe evaluated?

Through crushing strength tests and porosity testing (measuring the rate of infiltration in liters per minute per meter length).

Are fine aggregates used in the manufacture of these pipes?

Fine aggregates are generally minimized or omitted to ensure the concrete remains highly porous.

IS 4350

: 1967

concrete porous pipes for under-drainage

CurrentSpecializedSpecificationWater Resources · Cement Matrix Products

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This standard covers the requirements for dimensions, manufacturing, and testing of porous concrete pipes used primarily for sub-surface under-drainage systems.

concrete porous pipes for under-drainage

Quick Reference Values

Nominal internal diameter range80 mm to 900 mm

Standard pipe lengths600 mm, 900 mm, or 1200 mm

Curing period (water curing)Minimum 14 days

Practical Notes

Porous concrete pipes rely on specific aggregate grading (often lacking fine aggregates) to maintain porosity, making them more brittle than standard RCC pipes; handle with care during transport.

Do not use these pipes in highly acidic or sulphate-rich soils without using specialized cement (e.g., Sulphate Resisting Portland Cement).

Adequate filter media (like gravel or geotextiles) should be placed around the pipes in the trench to prevent clogging of the pores by fine soil particles.