At home, eggshells can easily be composted or sprinkled on flowerbeds as a slug deterrent or soil enhancer. But for industrial egg producers, shells have to be disposed of in landfill because the waste egg attached to them rots quickly, causing a smelly by-product.
Eggshell is made of calcium carbonate, like chalk, with a hardwearing, crystalline structure.
Each year approximately 11.4 Million tons of eggshell waste produced globally with 90 % of that going straight into landfill.
There has been some previous test in concrete mixes, which have shown potential for using eggshells as a lightweight aggregate replacement. It has also been researched as a cement replacement.
Eggshell is made of calcium carbonate, like chalk, with a hardwearing, crystalline structure.
Each year approximately 11.4 Million tons of eggshell waste produced globally with 90 % of that going straight into landfill.
There has been some previous test in concrete mixes, which have shown potential for using eggshells as a lightweight aggregate replacement. It has also been researched as a cement replacement.
Properties:
Lightweight, high in calcium/protein and porous.
Based on Properties what can this do?
• Light weight concrete
• Growth medium/fertilizer
• Moisture retention
To what extent can it meet the projects aims?
To create an architectural façade system that will be made from a low carbon based concrete and use a waste stream that can act as a carbon sink to be used as a habitat for the growth of plants/ microbe / microorganisms.
• Permeability
• Large surface area for carbonation
• Growth on Façade
• All of this will need to be tested
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