摘要 |
The present invention relates to a method of treating marine or river dredging sediments, especially harbour zone sediments, whose free water content is between 40 and 80% by weight, for the purpose of obtaining a solid material which is easy to handle, characterized in that it comprises the following successive steps: mixing said sediments with a treatment composition comprising a sulphoaluminate binder and at least one other component selected from a sulphate source and a catalyst of the hydration reactions of the sulphoaluminate binder; setting said mixture, leading to a compact mixture having a free water content of less than 20% by weight; then fractionating said compact mixture. The sediment thus treated may be incorporated into concrete or mortar formulas, which then have leachable fractions of less than 1% by weight. |