Abstract
This paper presents a field experiment in grouting a fracture at the Äspö Hard Rock Laboratory in Sweden. The fracture was investigated and described in terms of transmissivity, from which a prediction of grout spread was made, based on calculations that included a model for the penetrability of cement-based grouts. In the practical part of the experiment, the fracture was grouted and separated from the rock so that visual and chemical investigations could be performed. The grout spread evaluated from the separated fracture was found to agree with the prediction. It was verified that the grout spread was halted by the limited penetrability of the grout, which was in accordance with the prediction.
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