Rethinking Bridge Deck Waterproofing with Diamond Grinding

A durable, sustainable alternative to traditional asphalt overlays

A recent peer-reviewed paper by George Vorobieff, a leading subject matter expert on concrete pavements, presents a compelling case for using conventional diamond grinding (CDG) of concrete bridge decks as a primary alternative to waterproofing, challenging the long-standing practice of applying a membrane and asphalt overlay.

The paper, "To waterproof bridge decks or not," details how CDG offers a high-performance alternative that provides significant long-term benefits for asset managers and infrastructure projects.

Key Advantages of Conventional Diamond Grinding

• Exceptional Durability: A diamond-ground concrete surface is a durable wearing course expected to last more than 20 years, minimizing the need for frequent maintenance and costly asphalt replacement cycles.

• Enhanced Safety: CDG delivers a uniform, high-friction surface with excellent skid resistance and a smoother ride quality. This process can significantly lower the International Roughness Index (IRI), reducing dynamic loads from heavy vehicles and improving safety for all road users.

• Environmental & Sustainable Benefits: An exposed, diamond-ground concrete surface offers multiple environmental advantages. Its lighter color reflects more light, reducing nighttime energy costs. The surface also absorbs CO2 through carbonation, eliminating the need for resource-intensive asphalt and membrane materials.

Practical Application for Asset Managers

Mr. Vorobieff's research provides practical design advice for incorporating CDG into bridge projects. The paper highlights that well-compacted and properly cured concrete is sufficient for waterproofing and common concerns like ride quality and texture are effectively addressed with diamond grinding. This approach provides a sustainable and cost-effective solution for achieving a waterproof deck without relying on traditional overlays.

These findings suggest a shift in how we approach bridge deck construction and maintenance. By leveraging the inherent strengths of concrete enhanced by diamond grinding, we can build safer, more sustainable and longer-lasting infrastructure.

Read the full research paper here: https://ow.ly/KeyP50X7RVG. And reach out to learn how the IGGA can help you with your bridge project at https://www.igga.net/contact-us