Mechanical and Thermal Properties of Sustainable Composite Building Materials Produced by the Reprocessing of Low-Density Polyethylene, Biochar, Calcium Phosphate, and Phosphogypsum Wastes

This paper presents the results of experimental and analytical studies mechanical thermal properties laterite composites mixed with reprocessed low-density polyethylene waste (LDPE), calcium phosphate (CaP) phosphogypsum wastes, biochar to form brick composites. Bricks mixtures 20% by volume LDPE, 15% CaP, gypsum were shown have excellent compressive strength, flexural fracture toughness. The 1% LDPE had best blend properties, such as strength toughness, after sintering for ∼24 h. There was a linear association between weight loss bricks. Scanning electron microscopy optical images revealed evidence crack bridging particles. laterite–LDPE composite 5%, 10%, temperatures ∼850°C, ∼720°C, ∼710°C, respectively, undergoing softening, cold crystallization, cooling.