Patented Technology · ViRaj Engineers

POLY
KRIB

India's first patented system that transforms plastic waste into certified, structural civil engineering components — retaining walls that last a lifetime, built from materials that would otherwise destroy the planet.

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Patent Held by ViRaj Engineers
IIT Mumbai Vetted
Structural Stability Certificate
1 Year Insurance Cover
The Problem We Solve

INDIA'S PLASTIC CRISIS IS A CIVIL ENGINEERING OPPORTUNITY

India generates 35 million tonnes of plastic waste every year. The average city produces 1,600 tonnes of solid waste per day — 12% of which is plastic. Only 30% gets recycled.

Single Use Plastic (SUP) and Multi-Layer Plastic (MLP) are classified as non-recyclable under Government of India guidelines. The only options available today are incineration — releasing toxic dioxins — or landfill. Both are environmental catastrophes.

PolyKrib changes this entirely. We take plastic waste that would otherwise be burned or buried, and transform it into structural civil engineering components — durable, certified, and ready to install.

35M
Tonnes of plastic waste per year in India
70%
Has no recycling pathway — burned or buried
0
Plastic to landfill when PolyKrib is adopted
Plastic waste in Indian urban environment
12%
of all municipal solid waste is plastic
The Innovation

FROM WASTE TO WALL

A simple, powerful idea: collect plastic waste, manufacture structural lumber, build certified retaining walls.

PolyKrib process: Plastic Waste → Recycled Lumber → Retaining Wall
01
Collect Plastic Waste

Single Use Plastic (SUP) and Multi-Layer Plastic (MLP) are collected from Material Recovery Facilities, landfills, and urban waste streams — materials that have no conventional recycling pathway.

02
Manufacture Crib Lumber

The collected plastic is processed into polymeric crib elements — structural lumber with good compressive and flexural strength, zero porosity, and non-biodegradable properties. Factory-made and ready to install.

03
Build Retaining Walls

The crib elements are assembled on-site into Reinforced Soil Crib Walls up to 10m high. Geogrids are connected via bodkin joints for maximum strength. Gravel infill provides drainage. Structurally certified and insured.

The PolyKrib Advantage

SIX REASONS TO CHOOSE POLYKRIB

Upcycled

Made from 100% recycled plastic waste — SUP and MLP diverted from landfills and water bodies. Fully upcycled into a product of higher structural and economic value.

Weather Proof

Performs in all climatic conditions — from monsoon-saturated slopes to arid highway cuttings. The polymeric lumber is impervious to water, frost, and UV degradation.

Maintenance Free

Zero ongoing maintenance. The crib lumber is non-biodegradable with zero porosity — it will not rot, corrode, or require repainting over its entire service life.

Sustainable

Substantially reduces the consumption of stone and concrete. Uses locally available granular backfill. Designed to work with nature — reducing the carbon footprint of retaining wall construction.

Bug Proof

Completely resistant to termites, insects, and biological attack. Unlike timber crib walls, PolyKrib elements will not be compromised by pest infestation over time.

Perpetual

Designed for permanence. The polymeric structure does not degrade over time — delivering a service life that outlasts conventional timber or unreinforced masonry alternatives.

Applications

WHERE POLYKRIB PERFORMS

Two categories of application — from high-load structural walls to urban landscape products.

Engineered Applications
Structural & Civil

High-performance structural applications where plastic lumber elements replace conventional concrete or timber in load-bearing civil engineering systems.

  • Retaining Walls (8m–10m)
  • Reinforced Soil Walls
  • Slope Reinforcement
  • Outdoor Staircases
  • Parking Frames
  • Shuttering Materials
  • Hydraulic Applications
  • Road Embankments
General Applications
Urban & Landscape

Urban beautification and landscape products manufactured from the same recycled plastic lumber — durable, weather-proof, and maintenance-free.

  • Garden & Street Furniture
  • Kerb Stones
  • Paver Blocks
  • Delineators & Bollards
  • Tree Guards & Planters
  • Pathway Lights
  • Picket Fences
  • Door Frames & Patio Flooring
Technical Specs

REINFORCED SOIL CRIB WALL SYSTEM

Engineered to the same structural standards as conventional reinforced soil walls — with a zero-waste material supply chain.

Structural Stability Certificate and 1 Year Insurance Cover are provided with every PolyKrib installation. Third-party vetting by IIT Mumbai.

Wall System
Reinforced Soil Crib Wall with Polymeric Waste Crib Elements
Wall Heights
8m to 10m (standard range)
Crib Material
Recycled polymeric lumber — non-biodegradable, zero porosity
Infill Material
Gravel 60mm–80mm (filter media + free draining system)
Reinforcement
Geogrids / Geostrips attached via bodkin joint for maximum connection strength
Backfill
Well Graded Granular soil available at site
Strength
Good compressive and flexural strength — no buckling or bending
Supply
Factory manufactured, supplied to site ready to install
Aesthetics
Available in multiple colours; aesthetically pleasing finish
Certification
Structural Stability Certificate and Warranty provided
Insurance
1 Year Insurance Cover included (extendable on premium)
Third Party
IIT Mumbai — Environmental Geotechnology Department
Technical Credentials

DEVELOPED & VETTED BY INDIA'S BEST

PolyKrib is a ViRaj Engineers proprietary system — independently verified by IIT Mumbai and guided by India's foremost geotechnical experts.

ViRaj Engineers

Inventor & Patent Holder · Research, Development & Execution · Sole Owner of PolyKrib Technology

Mr. Shirish Joag

Independent Geotechnical Consultant — Guidance, QA/QC Parameters, Technical Proof Checks

IIT Mumbai

Environmental Geotechnology Department — Independent Technical Vetting & Structural Verification

READY TO SPECIFY
POLYKRIB?

Whether you are a contractor, consultant, or project owner — our team can provide technical specifications, cost comparisons, and structural certificates for your project.

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