The KTI Road Stud Without Shank (Make: 3M Series 290) is engineered for fast, efficient surface-mount installation across road infrastructure projects. Because it is designed without an anchoring shank, the marker mounts directly onto clean, cured pavement surfaces without requiring core drilling, hole excavation, or structural alteration of the roadway.
Substrate Compatibility and Surface Preparation
Proper surface preparation is essential to achieve maximum mechanical adhesion and long-term retention under heavy commercial vehicle traffic. The shankless marker is compatible with both asphalt (bitumen) pavements and Portland cement concrete (PCC) surfaces.
- Pavement Condition: The application area must be structurally sound, fully cured, and free of loose aggregate, cracking, or spalling.
- Surface Cleansing: Thoroughly clean the mounting location using wire brushing, compressed air, or high-pressure washing to eliminate road dust, dirt, debris, oil, grease, curing compounds, and moisture.
- Dryness Requirement: Ensure the road surface is completely dry prior to applying bonding compounds; moisture prevents adhesive cross-linking and degrades bond strength.
Recommended Adhesive Systems
The raised pavement marker bonds securely to pavement substrata using two primary commercial bonding compounds:
- Two-Part Epoxy Compounds: Standard commercial road stud epoxy formulations designed for rapid curing and high shear strength.
- Bituminous Adhesives: Manufacturer-recommended hot-melt bituminous adhesive pads or compounds formulated for high-impact asphalt bonding.
Step-by-Step Installation Procedure
Follow these sequential steps to ensure compliance with road engineering standards during installation:
- 1. Layout and Alignment: Mark the installation points along the designated road center line, edge line, pedestrian crossing boundary, or highway ramp according to MoRTH and Indian Roads Congress (IRC) road safety layout drawings.
- 2. Adhesive Application: Dispense the mixed two-part epoxy or melted bituminous compound onto the prepared road surface. Apply sufficient adhesive to cover the entire 100 mm x 90 mm footprint, allowing a slight, continuous bead to extrude around the perimeter when pressed.
- 3. Placement via Finger Grips: Utilize the integrated finger-grip recesses molded into the high-impact thermoplastic body. These grips allow the installer to handle, align, and position the unit accurately into the adhesive bed without contacting the bonding agent.
- 4. Alignment of Reflective Faces: Orient the dual-sided red retroreflective microprismatic lens faces parallel to oncoming traffic paths to provide bidirectional delineation and wrong-way warning visibility.
- 5. Firm Pressure: Apply uniform downward manual pressure to seat the marker firmly into the adhesive bed at the designated 18 mm profile height.
- 6. Curing Time: Allow the adhesive system to fully cure in accordance with the compound manufacturer's cure schedule before opening the lane to live traffic.
Installation Specifications Summary
| Parameter | Specification |
|---|---|
| Mounting Design | Surface-mounted (Without shank / no core drilling) |
| Unit Dimensions | 100 mm (Length) x 90 mm (Width) x 18 mm (Height) |
| Unit Weight | 100 g (0.1 kg) |
| Body Material | High-impact engineered thermoplastic |
| Optics Orientation | Two-way / Bidirectional (Dual red reflectors) |
| Compatible Substrates | Asphalt / Bitumen and Portland Cement Concrete (PCC) |
| Compatible Adhesives | Two-part road stud epoxy, hot-melt bituminous adhesive |
| Compliance Standards | ASTM D4280, MoRTH, IRC Road Safety Specifications |
Replacement and Maintenance
Individual markers can be removed and replaced without damaging the surrounding asphalt or concrete substrata. Regular visual inspections ensure all markers remain securely bonded, while standard vehicle tire passes provide continuous self-cleansing action across the hard-coated microprismatic lenses.
