Dustless hardening material

For shallow soil improvement, most of the hardening materials used are powders, and a lot of the powder is air/windborne and flies everywhere, which is called ''dust''. Recently, the flying dust has become a serious problem at sites near residential areas and for workers' health. The purpose of this study is to further the development of ''dustless hardening materials'' that contain small amounts of oil. As a result, it was found that the new dustless hardening material is very effective with regard to reduction of the amount of dust produced, strength appearance and the amount of oil dissolved from treated soil. Therefore, it can be applied as an effective hardening material, and it poses no hazard to the environment.