Using eggshell waste in red wall tiles

Abstract

Large quantities of eggshell waste are discarded in the food processing industry. This work investigates the incorporation of eggshell waste as a raw material into a wall tile body, replacing natural carbonate material by up to 15 wt%. Formulations containing eggshell were uniaxially dry pressed and fired at 1150°C using a fast-firing cycle. Physico-mechanical properties of the fired tiles (e.g. linear shrinkage, water absorption, apparent density, flexural strength) were then determined. Development of the microstructure was followed by scanning electron microscope (SEM) and X-ray diffraction (XRD) analyses. The results showed that eggshell waste could be used in wall tiles, in the range 5–10 wt%, as a partial replacement for traditional carbonate-based materials with only a slight decrease in the end product properties.

Limestone derived eggshell powder as a replacement in Portland cement mortar

“…Eggshells have been investigated in the form of limestone or lime in civil engineering applications. For example, Freire and Holanda [9,10] added 0-15 wt.% eggshell powder to 70 wt.% red plastic clay, 15 wt.% commercial quartz and 0-15 wt.% calcareous materials to produce ceramic wall tiles. The mixture was dried and sintered at 1150°C for 1 h. The wall tiles exhibited flexural strengths on average of 16 MPa with 5-10 wt.% and 15 MPa with 15 wt.% eggshell powder additions.…”

Utilisation of Plastifying and Fluxing Wastes of Plastics and Eggshell Powder in Manufacture of Eco-Friendly Floor Tiles

“…However, when sand a high bulk density material of sand was continuously replaced by ESP, it led to a reduction in density by 14.3%. Therefore, there was a weight loss when the percentage of ESP increased and sand reduced [51].…”

Recent advances in green processing technologies for valorisation of eggshell waste for sustainable construction materials

“…On the basis of circular economy, the incorporation of Eggshell powder as a flux for the production of ceramic tiles was summarized in Table 6 . With the addition of ESP from 0- 20% from the published works the physical-mechanical properties of the tiles gave the optimum values due to filler effect of the ESP content and the firing temperature [ 118 , 119 ]. Freire et al.…”

“…Freire et al. [ 119 ], reported that, the change in physical-mechanical properties was attributed to decomposition of calcite into CO 2 outside the specimens. However, the calcite decomposition was revealed through Scanning Electron Microscopy microstructural characterization that which was dominated by high degree of porosity in the fractured surfaces [ 120 ].…”