The most simple epoxy injection method is _____ injection.

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RRB JE CBT 2 (Civil Engineering) ReExam Official Paper (Held On: 04 Jun, 2025)

Answer 1

Explanation:

The brush injection method is considered the most simple epoxy injection method, particularly for surface-level cracks or sealing jobs, where high pressure or specialized equipment isn't needed.

Brush Epoxy Injection

Basic Technique: Involves applying epoxy resin using a brush directly onto the cracked or damaged surface.
Surface Treatment: Suitable for hairline cracks or when sealing surface pores to prevent moisture ingress.
Ease of Application: Requires no pressure systems or mechanical tools—just manual labor and a brush.
Cost-Effective: Minimal equipment and materials make it one of the cheapest and most accessible methods for minor repair tasks.

Additional Information Low Pressure Injection:

Involves the use of ports and pumps to inject epoxy at controlled low pressures (around 0.2 MPa).
More suitable for slightly deeper cracks but requires setup time and more equipment.

Hand Gun Injection:

Uses a caulking-type hand gun to inject epoxy.
While simple, it is more involved than brushing as it targets deeper cracks and requires cartridge-based resin.

High Pressure Injection:

Used for critical structural crack repairs, typically under pressure greater than 0.5 MPa.
Requires professional setup, risk management, and is not suitable for all types of cracks.