Effects of Wood Chips Types and Mixing Ratio to the Compression Characteristics of Steelmaking Slag Mixed with Wood Chips
Under-sieve residue, a type of disaster waste generated by earthquakes and tsunamis, contain large amounts of wood chips. This residue cannot be used as ground material mainly because its bearing capacity is insufficient and the decay process of wood chips has not been well understood. In this study, unconfined compression (UC) tests were performed using two types of wood chips (fibrous cocopeat and granular hinoki), which closely resemble the under-sieve residue, with slag and Iwaki sands. The test results indicated that the UC strength of the slag mixed with cocopeat or hinoki at 10% by volume was higher than that of only slag. In addition, they indicated that the UC strength and deformation modulus of Iwaki sand mixed with cocopeat were higher than those of just Iwaki sand for cocopeat mixing ratios of less than 20% by volume.
Keywordsfibrous wood chips steelmaking slag geo-materials unconfined compression characteristics
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This research was supported by the Steel & Slag Association and the Obayashi Foundation. The authors express their appreciation for their support.
- Karamacharya, M.R., Uchida. I., and Idemitsu, T. (1979). On the studies of utilisation of converter furnace slag in road bases. Journal of Japan Society of Civil Engineers, (282), pp 101–113 (in Japanese).Google Scholar
- Nonoyama, H., Nakano, M., Araki, T., and Hamajima, K., (2014). Mechanical behaviour of soil-wood chip mixtures generated from earthquake waste. Proceeding of the 7th International Congress on Environmental Geotechnics, pp 527–532.Google Scholar
- Mori, M., Takahashi, H., Ousaka, A., Horii, K., Ishii, T., and Kotani, K. (2003). A proposal of new recycling system of high-water content mud by using paper debris and polymer and strength property of recycled soils. The Mining and Materials Processing Institute of Japan, Vol. 119, pp 155–160 (in Japanese).Google Scholar
- Oobayashi, S., Kikuchi, Y., Hyodo, T., Mutoh, M., and Saitoh, S. (2015). Strength characteristics under seawater environment of geo-material mixed with refined steel making slag. Journal of Japan Society of Civil Engineers, Ser. B3(Ocean Engineering), Vol. 71, pp 1167–1172 (in Japanese).Google Scholar
- Tuboi, T., Kimijima, T., and Koide, Y. (1974). Solidification property of converter steelmaking slag. The Annual Report of Cement and Concrete Engineering, Vol. 28, pp 98–103 (in Japanese).Google Scholar
- Yoshikawa, T., Kikuchi, Y., Hyodo, T., Kakihara, Y., Iwai, D., and Kaneda, T. (2018a). Influence of differences in fine-grained slag content on hydraulic solidification of converter steelmaking slag. Proceedings of the 17th Global Joint Seminar on Geo-Environmental Engineering, pp 169–174.Google Scholar
- Yoshikawa, T., Kikuchi, Y., Hyodo, T., Obayashi, S., Kakihara, Y., Iwai, D., and Kaneda, T. (2018b). The effect of aging treatment on the mechanical properties of steelmaking slag mixed with crushed slag. New Advances in Geotechnical Engineering, ISBN 978-7-114-13956-7, pp 410–415.Google Scholar
- Yoshikawa, T., Kikuchi, Y., Noda, S., Kakihara, Y., Oshikawa, R., and Oshino, A. (2018c). Unconfined compression strength of converter steelmaking slag mixed with subsidiary solidifying materials. Research Presentation of The 15th Kanto Branch of Japanese Geotechnical Society, pp 298–301 (in Japanese).Google Scholar