CONTENTS
Preface ........................................................................................................................................
ii
Introduction ...............................................................................................................................
1
Background ................................................................................................................................
1
Current practice ........................................................................................................................
1
Current materials .................................................................................................................
2
Current problems in cold regions ......................................................................................
3
Proposed new method for MESL construction ....................................................................
3
Plastic upper membrane .....................................................................................................
3
Membrane protection ..........................................................................................................
3
Membrane sealing ................................................................................................................
3
Polyethylene lower membrane ..........................................................................................
4
Soil drying methods ............................................................................................................
4
Test demonstrations .................................................................................................................
4
Materials manufacturers .....................................................................................................
4
MESL materials ....................................................................................................................
4
Absorbent ..............................................................................................................................
5
MESL demonstration ...........................................................................................................
5
Absorbent demonstration ...................................................................................................
12
Observations ..............................................................................................................................
16
MESL demonstration observations ...................................................................................
16
Absorbent demonstration observations ...........................................................................
19
Conclusions ...............................................................................................................................
19
Materials and construction .................................................................................................
19
Absorbent test .......................................................................................................................
20
Recommendations ....................................................................................................................
20
Literature cited ..........................................................................................................................
20
Appendix A: Recommended materials for constructing a MESL .....................................
23
Abstract ......................................................................................................................................
25
ILLUSTRATIONS
Figure
1. Cross sections of typical MESLs....................................................................................
2
2. Test-site locations at Fort Drum, New York ................................................................
6
3. Construction details of the MESLs ...............................................................................
6
4. Placing fill soil inside the MESL ...................................................................................
7
5. Using a D-7 to spread soil in the MESL .......................................................................
7
6. Taping the lower membrane ..........................................................................................
8
7. Spreading the gravel wearing course on the MESL ...................................................
8
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