really I do not know but before using it you have to know the composition of its components and if it is active or inactive i mean inert or amorphous
Walnut shell has been used as:
- Filler in FRP
- Filler in epoxy
- Partial replacement of fine aggregate in concrete
Walnut shell is sufficiently hard natural material which can be used as coarse aggregate partially for making lightweight concrete, However, its particle size , shape and gradation will affect work-ability and strength of concrete. Moisture content and water absorption properties will influence shrinkage performance. For small articles of concrete it can be tried.
Walnut Shell Fillers
Ground walnut shell grits and flours are made for the construction, furniture, adhesives, paint, plywood, resin, rubber, paint and cosmetic industries. For anti-slip applications, ground walnut shell serves as a suitable additive for stairs, decks, pools, floors, and ramps. In addition, walnut shell flour is a preferred additive in rubber and plastics compound manufacturing. Moreover, walnut shells are employed in burn-out applications to improve porosity in ceramics.
https://www.azom.com/article.aspx?ArticleID=10430
yes, you can use to yield light weight concrete , but I advise you to use material that available within Iraq environmental such as Palm fronds.
Dear Nahla
The promising results of the attached paper indicated the potential of using walnut shell for producing structurally applicable and environmental friendly concrete.
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