Mechanical properties and improvement effect on variation of cement-treated soil mixed with cellulose nanofiber

Cellulose nanofiber (CNF) is a biomass material made from wood fibers that have been refined to the nano-order. Currently, CNF is being developed for a variety of applications in various industries by taking advantage of its characteristics (large specific surface area, light weight, high strength, low thermal expansion, and biodegradability). On the other hand, in the field of geotechnical engineering, technological development using CNF has just begun. The authors investigated the quality of cement treated soil by the addition of CNF in terms of increased strength and improved dispersion. In laboratory mixing tests, the addition of ACC-CNF to the cement-treated soil showed that the strength development was equivalent to that of the specimens prepared by standard methods, even at shorter mixing times.