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Rock Anchoring by using ICFS CM585PE-PRO Pure Epoxy Injection Mortar

Rock Anchoring in Indian Conditions Using ICFS CM585 Pure Epoxy Mortar :
A Field Study in Collaboration with COEP and Viraj Engineers

Objective
To determine the safe pull-out capacities and bonding performance of steel rebars anchored in rock strata using ICFS CM585 Pure Epoxy, under realistic site conditions in India.

Background & Challenge
With growing demand for high-rise construction, deeper foundations often reach rock strata where hydrostatic uplift pressures become significant. Traditional anchoring methods are slow, costly, and poorly suited for wet, uneven surfaces. There's been a lack of documented performance data under Indian conditions.

Methodology
Sites: Two live construction sites in Pune with different rock types intact bold and bold rock.
Testing Oversight: Dr. Inshwar Sonar (Assistant Professor, COEP), with certified calibrated equipment.
Data Captured: Pull-out strength, elongation, failure modes.

Key Findings
Bond Stress: Decreased with bar diameter (e.g., 16mm: 7.2 T/mm, 32mm: 5.71 T/mm)
Max Stress: 32mm bars showed highest bond strength (3.38 MPa) due to greater surface area
Rock Influence: Intact basalt out performed fragmented rock by 15-20%
Failure Modes: Predominantly failures found of rock breakage and no bar fractures
Anchor Orientation: Vertical and horizontal anchors showed comparable performance with proper installation technique

Design Recommendations
Account for rock type, bar diameter, moisture levels and orientation
Use site-specific pull-out values to design anchor embedment depths
ICFS CM585PE is suitable for demanding conditions like uneven, water-exposed rock surfaces

Conclusion
For structural rock anchoring using pure epoxy injectable mortars, this first of its kind field study validates the application in Indian geology. ICFS CM585PE provides a reliable, tested alternative to conventional systems, ensuring both speed and safety in modern foundation engineering.

Description
CM585 is a 2 component high strength pure epoxy chemical anchoring resin system. It is designed for deep embedment and large diameter holes due to its zero shrinkage and longer working times. For diamond drilled holes, with rebar, and in areas of high chemical exposure eg. Seasalt and swimming pools.

Specific Benefits