A New Practical Solution for Effective Use of Dredged Sand - Mixture of Dredged Sand and Lightweight Materials
Type:
Presented during:
WODCON XVIII - 2007 Orlando, Florida, USA
Authors:
Kawabe
Abstract:
Construction of ports and offshore airports, which is now performed on a large scale in Japan, requires a large
volume of materials (mainly sand) for ground formation. However, it has become difficult to obtain large amounts
of pit sand from mountains because of nature conservation rules. On the other hand, dredging operations for
maintenance of seaways and berths have produced a large volume of soft waste materials (earth and sand) with
associated disposal problems. To recycle the dredged materials, lightweight mixtures have been developed and are
effectively reused as ground material. Lightweight mixtures are now produced as artificial ground material by
treating the dredged materials with solidifiers and lightweight materials (air bubbles, expanded beads, etc.). This
process allows control over the density and strength of the lightweight mixtures. This report describes the present
status of construction technology using such lightweight mixtures together with a practical solution
Keywords: Lightweight mixing treatment, dredged earth and sand, recycling, air bubbles, expanded beads