Following up on Eric Blond's answer - yes, TDR is the best way. Look at recent book "GeoMeasurements by Pulsing TDR and Probes", by O'Connor and Dowding, published by CRC Press. ISBN 0-8493-0586-1. Or contact Kevin O'Connor at the above e-mail address.
John Dunnicliff
Eric Blond wrote:
> 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,
>
> --
>
> ___________________________
> 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]
> ________________________________________________
>
> 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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