Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE This work explores the use of various fillers, including eggshell powder, feather meal, peanut hulls, and sawdust to reinforce a base binder GFS90 (comprised of 90 wt.% sulfur, 5 wt.% chicken fat, and 5 wt.% sunflower oil). The resulting composites showed impressive compressive strengths ranging from 15.3 to 36.2 MPa, making them a potential replacement for ordinary Portland cement.

ABSTRACT
High sulfur-content materials (HSMs) are emerging as alternatives to conventional structural materials because they can be prepared from abundant industrial and agricultural byproducts while exhibiting excellent mechanical properties. In this work, a base binder, GFS90 (90 wt.% sulfur, 5 wt.% chicken fat, and 5 wt.% sunflower oil), is reinforced with eggshell powder (ES) and feather meal (FM) from poultry industry waste, as well as lignocellulosic fillers including peanut hulls (PH) and sawdust (SD). The resulting composites exhibit negligible water uptake (< 0.3 wt.%, 24 h immersion) and mechanical strengths ranging from 15.3 to 36.2 MPa. The peanut-hull composite (GFS90-PH) reaches 36.2 ± 2.0 MPa, more than double the 17 MPa compressive strength benchmark for ordinary Portland cement used in residential construction. Thermal analysis reveals sulfur-dominated transitions with melting temperatures near 115°C–118°C and glass transitions between −34°C and −38°C. Additive incorporation modestly improves resistance to thermally induced mass loss, with decomposition onset temperatures ranging from 209°C to 221°C. These results demonstrate that agricultural and poultry products reinforce sulfur-rich polymer composites, yielding mechanically robust and water-resistant materials that rival conventional cement-based construction materials.