![]() Larger pieces of RCA are perfect for creating retaining walls or rip-rap to help control erosion or create a breakwater. To create a raised garden bed, lay crushed concrete in layers. Some of these include improved drainage and warmer soil, both of which lead to faster growth for your garden when spring comes. Raised Garden Beds/LandscapingĬreating a raised garden bed provides a lot of benefits. Uniform pieces also make the finished walkway more visually appealing. This will help prevent rainwater from causing runoff and drainage issues. Make sure that you’re using uniform RCA pieces for your walkway. Walkways / PathwaysĬrushed Concrete can be reused to create walkways in your landscaping. Smaller-sized RCA can serve as a stable, reliable base for asphalt parking lots. What kinds of projects can be done with Recycled Concrete? Base for Asphalt Parking Lots and Roads Dry aggregate can even be reconstituted as new concrete. Smaller gravel bits of RCA are often used as a sustainable, affordable subbase for roads. Large pieces of RCA, for example, can be used to create “rip-rap.” Rip-rap, sometimes referred to as riprap, shot rock, rock armor, or rubble, is larger slabs of recycled concrete used along shorelines to control erosion or form a breakwater. Each of these sizes is well-suited to different applications, making the material incredibly versatile. When concrete is recycled, it can be broken down into a variety of sizes. It can make the separation of contaminants much more difficult, lowering the quality of the finished RCA. Pulverizing the concrete isn’t the best way to recycle concrete, however. After this step, the concrete is separated out by size.Īnother method for recycling concrete is pulverization. After being crushed to an even smaller size, the crushed concrete is then screened so that dirt and other foreign objects can be removed. Next, the broken up concrete is run through a secondary impactor. The first step to recycling old concrete is to use industrial crushing equipment in order to break up the original structure. ![]() What kinds of Concrete can be Recycled into RCA?Ĭoncrete from many different applications such as old concrete structures, sidewalks, building slabs, foundations, curbs, and more can be recycled into RCA. Crushed concrete continued to grow in popularity into the 1980s along with recycling efforts. Crushed concrete became a more and more popular material choice for both roadways and driveway construction. Later, In the 1970s there was a big push to reduce landfill overflow. During this reconstruction project, the old concrete was recycled and reused in the new project. US Route 66 in Illinois needed to be expanded from two to four lanes. The first instance in the US was following World War II. Since the 1940s, recycling concrete pavements (crushed concrete) has been a fairly common solution. US History of Using Crushed Concrete for Roadway and Driveway Construction Old concrete can be crushed down to specific sizes, cleaned so that unwanted debris is removed from the mixture, and reused as a solution to a number of construction and landscaping problems. Recycling crushed concrete to be reused helps reduce landfill crowding AND saves more resources from being used to create new concrete. There is a solution to this wasteful, expensive cycle. At the same time, new concrete is being created to begin the process all over again. Rather, it sits there taking up space and causing environmental problems. ![]() Concrete is not biodegradable and unfortunately, will not decompose. When any concrete structure, road, sidewalk or parking lot is destroyed, that concrete is often deposited in a landfill. Recycled Concrete Aggregate (RCA) - also called “crushed concrete” - is made up of asphalt debris from other construction projects that can be reused to create driveways, pathways, garden beds and more.
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