In a surprising twist, Roller Compacted Concrete (RCC) is making waves in the asphalt industry, with asphalt contractors exploring new avenues by incorporating this zero-slump mix, writes Brandon Noel for For Construction Pros. The demand for RCC is on the rise, especially in industrial, commercial, and even some residential projects. Unlike traditional concrete contractors who use slipform pavers, asphalt contractors find that they can leverage their existing skills, machinery, and know-how for RCC projects, including asphalt pavers, tandem rollers, and density gauge testing.
RCC, originating in Canada in the 1970s, has experienced a recent surge in popularity, particularly from 2011 onwards. Historically used in large industrial areas with slow-moving or static traffic, it’s now finding its way into road construction, doubling in demand in 2021.
The unique appeal of RCC lies in its blend of asphalt, concrete, and soil technology. The mix is significantly drier and denser than traditional concrete, making it more akin to asphalt in terms of consistency. However, successful implementation requires specialized equipment, particularly high-density pavers with tamper bars and pressure bars.
To navigate the complexities of RCC, contractors need to understand the nuances of its mix design, which involves a “negative” slump concrete with minimal moisture content. This dry mix allows for quicker accessibility to traffic, making it ideal for various applications. However, choosing the right equipment, such as high-density pavers from companies like Vögele and Dynapac, is crucial to achieving the necessary density and strength in RCC projects.
Despite the learning curve, the benefits of RCC, including its durability, fast application, and cost-effectiveness, make it a compelling addition to asphalt contractors’ offerings. With the industry possibly shifting towards favoring high-density pavers, investing in RCC could position contractors ahead of the curve. As the demand for RCC continues to grow, contractors are advised to practice and familiarize themselves with the nuances of this innovative paving solution before taking on large projects.
Read more here: https://www.forconstructionpros.com/concrete/article/22882655/what-is-roller-compacted-concrete-and-why-asphalt-contractors-should-know