APPENDIX B: ADHESION TEST DATA
The data are presented in groupings of six graphs for each mortar slab. There are
a total of 33 such groupings. In each grouping, Figure a is a composite of all data
obtained from a particular slab while Figures b through f present individual force-
displacement results for each 1-in.-wide strip peeled off that slab. Each strip was
peeled off the slabs in two stages. The zero force reading at approximately the 2- to
2.25-in. mark separates the two stages.
By "thumbing" through the data, one quickly becomes aware of the variable
nature of adhesion. It fluctuates, sometimes wildly, along the distance of the peel.
Clearly, not all membranes are the same. Some grip quite strongly, at least in spots,
while others grip more uniformly to the mortar, but not as strongly.
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