PROJECT MODULES
- Module 4 -
Low pH Cement for Shocrete and Sealing Plug Construction Technology
The challenge: development and validation of specific "low pH" cement and subsequent demonstration of its application by constructing a sealing plug using shotcrete technique
Cementitious materials are widely used in underground engineering. For radioactive waste disposal, specific consideration is given to the applicable geochemical phenomena in the long term safety analysis, including for instance the possible interaction with the vitrified waste matrix or with the surrounding geological medium through a so-called plume effect.
In order to reduce these interactions, new cement formulations are considered, which are more neutral with respect to the waste matrix or underground environment, while keeping the necessary mechanical and sealing properties.
Moreover, this development must also include as well the placement of the cement at an industrial scale using the shotcrete technique for the construction of a disposal drift sealing plug and for rock-wall lining.
These objectives will be completed in a planned full-scale demonstration test.
1° Sketch of the sealing plug
2° Shotcreting for rock-wall lining
Download: ESDRED-Module 4 pdf
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