the partners in the CPAR project. Five compacted

tures are nonexistent, it was a purpose of this

study to validate the past laboratory results in

soil test pads (two each using two natural clays,

field test sections.

and one using a sandbentonite mixture), three

This report summarizes the research activities

ponds, each lined with a different GCL, and nine

accomplished in this portion of the CPAR pro-

test pans containing GCLs (Fig. 1) were construct-

gram.

ed at the landfill site.

Compacted clay

TEST PROGRAM

Two natural clay soils (Parkview clay--PV,

and Valley Trail clay--VT) were selected for eval-

Approach and test materials

To allow a comparison between field frozen

uation from four possible sources. Index proper-

samples and laboratory samples, a field test site

ties and hydraulic conductivities were measured

was constructed at a landfill in Menominee Falls,

during preliminary evaluations. Parkview clay

Wisconsin. This site was selected because it was

was selected because it has a relatively low plas-

located in an area that was likely to freeze each

ticity index (LL = 31, PI = 17), while Valley Trail

winter, and materials and equipment were avail-

clay was selected because it had a higher plastic-

able that would allow full-scale construction