Adding rubber chip won't work as rubber has no effect on deep riding sand. The only thing you can do other than get rid of it is mix fibre with it to create a root like structure.

__________________
Scott Chambers
Director
Mainland Aggregates Ltd
Tel: +44 (0) 01234 831108
Fax: +44 (0) 1234 420 304
www.mainlandaggregates.co.uk