Slope and Drainage Protection Using GCCM in Jaipur, Rajasthan

On the Venus Capital Hike Project in Jaipur, Rajasthan, Ocean Non Wovens supplied 200 SQM of Ocean Geosynthetic Cementitious Composite Mat (GCCM) 9 MM to line slopes and drainage channels against erosion from monsoon runoff. A cast concrete lining would have done the same job, but with formwork, heavy equipment and a longer build.

Project overview

• Project Name: Venus Capital Hike Project
• Location: Jaipur, Rajasthan
• Product Supplied: Ocean Geosynthetic Cementitious Composite Mat (GCCM) 9 MM
• Quantity Used: 200 SQM

The project needed durable erosion control for slopes and drainage channels exposed to rainfall runoff and weathering.

What a GCCM is

A GCCM is a dry cementitious mix held within geosynthetic fabrics, usually with an impermeable backing. It arrives in rolls, is laid dry over the prepared surface, and is then wetted. After hydration it hardens into a thin, fibre-reinforced concrete layer. ASTM D8364 is the standard specification for GCCM materials.

GCCM is commonly used for:

• Drainage channel lining
• Slope stabilization
• Canal lining
• Culvert protection
• Mining and industrial infrastructure

Its main advantage over cast concrete is speed: there is no formwork, no batching and no extended wet curing, so a small crew can line a channel in a fraction of the time.

Site conditions in Jaipur

Jaipur has a semi-arid climate, but most of its annual rain falls in a few monsoon months, often as short, heavy storms. Dry, loose surface soil and sudden runoff are a bad combination: water concentrates in channels and on slopes and cuts into unprotected soil. Unlined drainage channels scour, silt up downstream and lose flow capacity, and slopes gully.

A hardened GCCM lining protects the soil surface from that flowing water while following the shape of the slope and channel.

Installation and quality control

The installation process typically involves:

• Preparing the slope or channel surface: trimming, removing loose stones and debris, and filling hollows so the mat sits in full contact
• Rolling out the GCCM material, overlapping adjacent rolls with the upstream roll on top so water flows over the joint, not into it
• Anchoring the edges in trenches and pinning the mat to prevent displacement
• Hydrating the cement layer with an even spray until it is saturated

Quality control checks confirm that the mat is fully hydrated and properly anchored. Inadequate hydration leaves dry pockets and reduces the strength of the hardened layer, which matters in Jaipur’s heat, where surfaces dry quickly.

Long-term performance and maintenance

Compared with conventional concrete lining, a cured GCCM offers:

• High resistance to hydraulic erosion
• UV stability
• Crack resistance: the fibre reinforcement holds the layer together and limits the brittle cracking seen in thin unreinforced concrete
• Little routine maintenance and fewer repairs

Joints and anchor trenches are still worth inspecting after the first heavy monsoon storms, since that is where any undermining would start.

Ocean Non Wovens manufactures and supplies GCCM and other geosynthetics for transportation, industrial and environmental projects across India. For a larger GCCM application, see the 2,000 SQM slope protection project in Purba Medinipur, or browse more case studies.