This phenomenon can be observed not only in the new data for
UMC and SSMC presented previously, but also in the data for other
soil types summarized in Table 2. Fig. 6 shows the relation of
normalized qu toW for all the data groups. As shown, for each type
of cement-stabilized clay, the normalized data points always fall
within a narrow band, although Cm varies over a wide range covering
both Zone I and Zone II (see Table 2 for the specific range
of Cm). Note that data groups S10–S13 are not included in Fig. 6
because the ranges of W covered in these data groups are too
narrow (S10 and S13, W 580%; S11, W 5106e115%; S12,
W 5 95e124%) for accurate determination of the normalizing
denominator quðCm, 160%, 91 daysÞ. Another observation that
can be made from Fig. 6 is that although the normalized qu-W curves
are different for different types of cement-stabilized clays, these
curves show a similar trend, and each of them can be fitted by
a power function. This power function and the relevant fitting
constants are also presented in Fig. 6.
In summary, within the range of interest there is a unique relation
of normalized qu-W for each soil type, which appears to be independent
of Cm and exhibits a similar trend in both Zone I and
Zone II.