Harshal Kavach

Harshal Kavach

Composite Ultra High Performance Concrete

HARSHAL KAVACH is an indigenously developed Composite Ultra High Performance Concrete (UHPC) designed for advanced structural protection, rapid construction, and long-term durability. Developed by J. Kumar Defence and Aerospace Pvt. Ltd., it addresses the demanding requirements of defence infrastructure, airfields, protective structures, and critical civil applications.

This next-generation material combines very high strength, ballistic resistance, chemical durability, and rapid deployment capability, enabling lightweight, long-life, and lowmaintenance structures suitable for extreme operational environments.

PRODUCT OVERVIEW
HARSHAL KAVACH is a lightweight, bullet-resistant, high-strength composite concrete engineered for both precast and cast-in-situ construction. Its unique formulation eliminates the need for conventional curing while delivering exceptional structural performance and durability. The material supports rapid construction and repair, ensuring minimal downtime for missioncritical infrastructure.

Key Capabilities

  • Ultra High Strength: Exceptional compressive and flexural strength enables reduced section sizes and lighter structures.
  • Bullet & Impact Resistance: Designed for protective applications including bunkers, shelters, and fortified positions.
  • Rapid Repair & Deployment: Localised repairs can be completed within minutes, allowing immediate return to service.
  • No Curing Requirement: Eliminates long curing cycles, enabling immediate load readiness.
  • Low Permeability & Chemical Resistance: Provides long-term resistance to water ingress, corrosion, heat, acid, and harsh environments.
  • Flexible & Customisable: Suitable for complex shapes, varying dimensions, and both precast and in-situ construction.

Typical Performance Indicators

  • Compressive Strength: ~250–300 N/mm²
  • Flexural Strength: ~20–30 N/mm²
  • Water Penetration: < 10 mm
  • Chloride Permeability (RCPT): < 700 Coulombs
  • Repair Time: 2–3 minutes
  • Form: Precast or Cast-in-Situ
  • Curing: Not required

Applications
Defence & Strategic Infrastructure

  • Rapid runway and airfield rehabilitation
  • Bunkers, guard posts, and fortified shelters
  • High-security perimeter and blast-resistant structures
  • Quick-deployment military infrastructure