Recycling of cross-linked polyethylene to create composite building materials

A technological solution of the production of composite building material based on waste cross-linked polyethylene and ceramic brick has been developed. The nature of the influence of cross-linked polyethylene on the strength and deformation characteristics of the composite is revealed. The nature of the destruction of composites based on polyethylene granules, waste of cross-linked polyethylene, hempcrete and traditional concrete is compared. It was revealed that the nature of the destruction of the proposed composites corresponds more to traditional concrete than to hempcrete, while the compressive strength is 20-40 MPa, depending on the content of crosslinked polyethylene. The adhesion of the aggregate in the form of cross-linked polyethylene to the cement matrix was evaluated. It was found that the aggregate in the form of cross-linked polyethylene has good adhesion to the cement matrix due to the irregular shape of the particles, surface roughness and the presence of carbon black in the composition of cross-linked polyethylene. The measured value of adhesion of the surface of cross linked polyethylene particles to the cement matrix was 0.98 MPa, which is comparable to the adhesion of the cement matrix to the polished surface of natural aggregates. An explanation for the formation of a heterogeneous durable structure due to the physical and chemical interaction of the components is given.

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