The present day construction industry mainly focuses on the reduction of waste accumulation by effective utilization of wastes and by-products in the production of high value building units. This present study encompasses the comprehensive research work conducted on the potentials of using biological shell powders from aviculture and aquaculture wastes as valuable bio - based filler in the production of gypsum plaster. The four different powders obtained from grinding the egg shell, conch shell, scallop shell and cuttle bone were used as replacements for gypsum binder at different proportions (2.5%, 5%, 7.5%, 10%, 12.5% and 15%) by weight. Initially the shell powders were subjected to particular treatment namely distilled water, heat, NaOCl (bleach) and H₂O₂ to remove their organic matter. The best treatment method was chosen from the obtained elemental analysis conducted on the shell powders after subjecting to various treatments. The elemental analysis results were further complemented by FTIR analysis to validate the removal of the organic matter. Mechanical, thermal and durability studies were conducted on the shell powders substituted gypsum binder to determine the efficiency of bio based shell powder as filling agent. The results showed that the gypsum plaster with enhanced mechanical properties, improved thermal performance and remarkable resistance to water absorption was obtained due to the shell powder substitution. A considerable improvement in the pore structure with well refined and compact microstructure was also evident from the SEM images. The manufactured eco-friendly bio based gypsum binder proves to be an eco-sustainable and economical solution for shell waste management.

当今的建筑行业主要集中在通过有效利用高价值建筑单元生产中的废物和副产品来减少废物积累。本研究包括对航空养殖和水产养殖废物中的生物贝壳粉作为石膏生产中有价值的生物基填料的潜力进行的全面研究工作。通过研磨蛋壳，海螺壳，扇贝壳和墨鱼骨而获得的四种不同粉末分别以不同的重量比（2.5％，5％，7.5％，10％，12.5％和15％）代替石膏粘合剂。 。最初，对贝壳粉进行特殊处理，即蒸馏水，热，NaOCl（漂白剂）和H ₂ O _2。去除他们的有机物。从获得的对壳粉进行各种处理后的元素分析中选择最佳的处理方法。元素分析结果通过FTIR分析得到进一步补充，以验证有机物的去除。对壳粉替代石膏粘合剂进行了机械，热和耐久性研究，以确定生物基壳粉作为填充剂的效率。结果表明，由于壳粉的替代，获得了具有增强的机械性能，改善的热性能和显着的抗吸水性的石膏灰泥。从SEM图像还可以明显看出，孔结构具有良好的细化和致密的微结构的显着改善。