Railway drainage works are among the most demanding applications for any lining material. Catch water drains, longitudinal line drains, and side (LHS) drains running between tracks and along the roadbed have to survive vibration, ballast movement, monsoon flow volumes, and years of minimal maintenance access, all while meeting exact Railway tender specifications. This is exactly the application nKrete GCCM was engineered for.

nKrete is supplied and installed to meet the specifications commonly cited in Indian Railway tender documentation, including:

  • ✅ Tensile strength of 20 kN (Longitudinal & Transverse) as per EN 10319
  • ✅ Static Puncture Resistance (CBR) of 3000 N as per EN 12236
  • ✅ Elongation at Break of 40% (Longitudinal & Transverse) as per EN 10319
  • ✅ Compressive strength of 40 MPa as per ASTM C 109
  • ✅ Fire Resistance rating Bs1-d0
  • ✅ CE-certified product, quality conforming to ASTM D8364/D8364M-21

Why nKrete for Line-Side and Catch Water Drains

Traditional cast-in-situ concrete lining for railway drains means shuttering, curing time, and heavy site machinery all difficult to justify on a live or partially-live rail corridor with tight possession windows. nKrete changes that:

  • ✅ Installs up to 10x faster than poured concrete, critical when working within limited track possession/block windows
  • ✅ Conforms to irregular drain profiles (catch water drains, line drains, side drains) without formwork
  • ✅ Hardens in 24 hours after hydration into a thin, durable, waterproof concrete layer
  • ✅ Minimal equipment and labour required, reducing cost and time on constrained railway right-of-way sites

Installation for Railway Drain Works

  1. Site preparation — jungle/vegetation clearing, removal of fencing as required, ballast removal if applicable, surface dressing and soil profiling
  2. Earth excavation for the drain profile to the approved drawing dimensions
  3. Roll-out of nKrete along the drain length, with a 100 mm overlap between consecutive mat sections (overlap is measured and included per standard BOQ practice)
  4. Fixing and anchoring using required fixtures, pegging, and fasteners as per site conditions
  5. Hydration and curing — water is applied to hydrate the cementitious core, hardening into a durable concrete layer within 24 hours
  6. Backfilling and surface finishing to complete the works

All work is carried out per approved design and methodology, in line with Railway specifications and the site engineer’s instructions. The design and methodology should be approved by the Railway authority before commencement, per standard tender conditions.

Where This Fits in Your Project

If your tender scope also includes slope or embankment protection alongside the drain works, see our Concrete Revetments (nKrete R) page for pre-fabricated grouted mattress systems suited to embankment and abutment protection. For subsurface water management running parallel to the drain (common on cutting sections), our Geo Drain Tube page covers composite drainage tube systems. And if your corridor also needs slope stabilisation using cellular confinement, see ennkae Cell (GeoCell).

For the full technical picture on nKrete GCCM as a product — including how it compares to Geosynthetic Clay Liners and HDPE liners for broader waterproofing needs — visit our main Geosynthetic Cementitious Composite Mat (GCCM) page.

FAQs

Q: What does “LHS” mean in railway drain tender documents?

A: In Railway tender and BOQ documentation, LHS typically refers to the line-side/longitudinal drain running alongside the track formation — distinct from cross-drainage culverts. nKrete GCCM is suited to catch water drains, line drains, and side drains of this type.

Q: Is nKrete approved for use in Indian Railway tenders?

A: nKrete is manufactured and supplied to meet the technical specifications commonly required in Railway tender documents, including EN 10319, EN 12236, ASTM C109, and ASTM D8364/D8364M-21, and is CE certified. Always confirm specific approval requirements with the relevant Railway zone/division for your tender.

Q: How is overlap measured for billing on railway drain works?

A: Standard practice (per typical BOQ language) is a 100 mm overlap between two consecutive GCCM sections, with the overlap quantity included in measurement for payment.

Q: How long does nKrete take to become load-bearing after installation?

A: nKrete hardens into a durable concrete layer within 24 hours of hydration, though full site-specific curing guidance should follow the approved methodology for your project.