Have never heard of this preparation procedure being used when batching
laboratory aggregate portions for mix design purposes. Appears that if
done, the absence of fines in the mix design specimens would not correspond
to the plant mixture as this would effect the voids calculations and the
asphalt content would most likely appear to be on the dry side.
> -----Original Message-----
> From: Daley, Kim (DOT/SOIL) [SMTP:soil001@gov.nb.ca]
> Sent: Thursday, February 18, 1999 11:53 AM
> To: 'Superpave Newsgroup'
> Subject: Mix Design Preparation
>
> New Brunswick (Canada) Central Laboratory:
>
> When doing mix designs for Superpave (or Marshall for that matter) does
> anyone out there rinse the material retained on the No.8 sieve(236mm)
> through to the No. 200 (75um) sieve in order to better control the dust in
> their mix? We have been doing this for years but I can't find anything in
> any publication such MS22 or SP2 that clearly defines the aggregate
> preparation for mix designs.
We batch a Dry Sample in the lab then do a washed gradation on it to get a
correction factor for the #100 & #200 seems to work good we are getting very
consistent Gse & Bulks
> -----Original Message-----
> From: owner-superpave@mcfeeley.cc.utexas.edu
> [mailto:owner-superpave@mcfeeley.cc.utexas.edu]On Behalf Of Briley, Jim
> L.
> Sent: Friday, February 19, 1999 5:37 PM
> To: 'superpave@mcfeeley.cc.utexas.edu'
> Subject: RE: Mix Design Preparation
>
>
> Have never heard of this preparation procedure being used when batching
> laboratory aggregate portions for mix design purposes. Appears that if
> done, the absence of fines in the mix design specimens would not
> correspond
> to the plant mixture as this would effect the voids calculations and the
> asphalt content would most likely appear to be on the dry side.
>
> > -----Original Message-----
> > From: Daley, Kim (DOT/SOIL) [SMTP:soil001@gov.nb.ca]
> > Sent: Thursday, February 18, 1999 11:53 AM
> > To: 'Superpave Newsgroup'
> > Subject: Mix Design Preparation
> >
> > New Brunswick (Canada) Central Laboratory:
> >
> > When doing mix designs for Superpave (or Marshall for that matter) does
> > anyone out there rinse the material retained on the No.8 sieve(236mm)
> > through to the No. 200 (75um) sieve in order to better control
> the dust in
> > their mix? We have been doing this for years but I can't find
> anything in
> > any publication such MS22 or SP2 that clearly defines the aggregate
> > preparation for mix designs.
>
>
