Converting Plastic Waste Into Construction Materials

Each year, about 300 million tons of waste plastic are produced, according to UNEP. Plastic waste accumulates just about everywhere from oceans, bays, and coastlines to riversheds, lakes, and population centers. It’s a well-known global problem, and yet where are the solutions? The Center for Regenerative Design and Collaboration (CRDC), which is based in Costa Rica, has been developing a process to convert waste plastic into building materials like bricks and concrete. The President and CEO at CRDC, Donald Thompson, answered some questions about the materials for CleanTechnica.

How are you able to take waste plastic and use it to make bricks?

We heat extrude shredded commingled plastic that has been pre-conditioned with mineral additives to make a plastic limestone hybrid that is crushed into a coarse sand aggregate. The resulting hybrid resin aggregate looks and performs exactly like natural coarse construction sand but is 1/4 the weight and provides other favorable qualities to the end products. We add this synthetic aggregate to standard concrete mixes up to 10% by volume.

How long does it take to convert the plastic, and how many bricks can you make in a day?

The aggregate production process is shredding-batching-extruding-granulating, the block molding process is totally conventional and is batching-mixing-molding-storing, in a perfect sequence this cycle could take place in a matter of hours from waste plastic to block.

Read More At CleanTechnica

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