8th International Scientific Research Congress, Çorum, Türkiye, 22 - 23 Ağustos 2020, ss.1-2
Nowadays the world has sought solutions for the problems of the rapid decrement of natural consumption and production sources, increment of waste and the decrease of storage spaces of wastes. This crisis has led researchers to focus on the recycling or reuse process of materials. In this context, this study considers the reuse process of natural herbal wastes with the investigation of all herbal sources that are reported statistically by TUIK. According to TUIK report prepared for 2019, there have been 11251 bearing and 10004 non-bearing walnut trees in Turkey and the production volume of walnut is measured as 225000 tons. This production process results with the existence of approximately 112500 tons of shell waste. This huge volume of waste is utilized by the sectors like agriculture, cosmetic, furniture, heating and etc. But up until now the consumption volume of this materials never reached to its production volume. In the context of this study, this mentioned additional unused waste of walnut shells were tried to be used for the stabilization of kaolin clays. For this purpose, sieve analysis, consistency limit tests, standard proctor tests and uniaxial loading tests are performed. Reference tests were conducted for pure kaolin clays and the stabilized mixtures were created with the use of different percentages (%5, 10, 15, 20) of granulated walnut shell wastes. Standard proctor test has been used to evaluate both the compaction behavior of mixtures and to prepare uniaxial test specimens. Uniaxial strength tests were performed for the specimens that are waited 0, 7, 28 days. Consequently, the comparisons done between additive-free and mixed specimens have shown that walnut shell waste materials can improve kaolin clays significantly. The application of the new suggested method has resulted in the decrease of soil unit weight and the increase of soil strength.