TDR probes are the best equipments available to conduct such measurements. See the following page for more info :
http://iti.acns.nwu.edu/clear/tdr/index.html
Take care, if you dont choose the right type of probe, you will have a poor measurement precision (relative size of the stones / probe), and the installation must be done gently if you don't want to break your probes.
We have had such equipments in road pavements for over five years. If you need any additional info, get in touch with me !
Best regards,
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___________________________
Eric Blond, ing., M.Sc.A.
Directeur Technique / Technical director
________________________________________________
SAGEOS
Geosynthetics Technology Center
Centre des Technologies Géosynthétiques
3000 Rue Boullé
St-Hyacinthe, Québec
J2S 1H9 CANADA
Tel: (450) 771-4608
Fax: (450) 778-3901
E-mail: [log in to unmask]
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Greg Arnold a écrit :
> I am interested in any information (or where I can find it) on instruments for measuring periodically (seasonally) the moisture content in crushed unbound aggregate layers in pavements. I am also interested in contacts in the UK for purchasing such instruments.
>
> Regards
>
> Greg Arnold
> Research Assistant
> School of Civil Engineering
> University of Nottingham
> University Park
> Nottingham
> NG7 2RD
> England
> work ph 0115 951 4601
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