Soil–cement bricks incorporated with eggshell waste

Abstract

The food processing industry generates large amounts of eggshell waste worldwide. The eggshell waste is rich in calcium carbonate (CaCO3), and is considered to be a solid waste material of very complex and difficult final disposal. This work investigates the reuse of eggshell waste as an alternative raw material into a soil–cement brick body, replacing cement by up to 30 wt%. Soil–cement bricks are uniaxially pressed and cured for 28 days. The technological properties of the cured bricks (e.g. apparent density, water absorption and compressive strength) are then determined. The results show that eggshell waste can be used in soil–cement bricks with excellent technical properties, in the range up to 30 wt%, as a partial replacement for Portland cement. Hence, application in civil engineering could be one of the best management practices for eggshell waste as a low-cost, alternative raw material.

Limestone derived eggshell powder as a replacement in Portland cement mortar

“…The results were in compliance with local ceramic tile standards which indicated this material could be used as an alternative to current wall tiles. Similarly, Amaral et al [11] investigated soil bricks containing partial PC replacements of 0-30 wt.% eggshell powder. Bricks containing 10-20 wt.% eggshell powder increased in compression strength by 12% and 7%, respectively as compared to the reference bricks without eggshell.…”

Potencialidades Do Resíduo Do Sistema FGD Utilizado Na Dessulfuração De Gases De Uma Coqueria

“…Para aplicação em materiais da construção civil é importante que se conheça a distribuição de tamanho de partículas (DTP) das matérias-primas. Enquanto outros pesquisadores precisaram beneficiar diferentes resíduos [16] a fim de introduzi-los na formulação de alvenaria, o gesso sintético FGD apresentou granulometria semelhante ao da argila, o que pode permitir maior empacotamento, melhor coesão de modo a evitar segregações. Na Figura 3 é mostrado como as partículas estão distribuídas.…”

Editorial

“…However, as the first two of these articles show, there are environmental safety limits that may be exceeded even if solidification within a cementitious matrix is undertaken. Even in developing economies, as shown by Amaral et al (2013), there is scope for waste to be incorporated into local building products and higher specification construction materials, as previously demonstrated by Guemidi et al (2015). However, it is clear that both supply and demand pressures mean that it is more likely that these wastes are utilised in more developed economies.…”