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Laboratory performance evaluation of CIR-emulsion and its comparison against CIR-foam test results from phase III.
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2009-12-01
[PDF-5.37 MB]
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Alternative Title:Laboratory performance evaluation of CIR-emulsion and its comparison against CIR-foam test results from phase 3;Laboratory performance evaluation of CIR-emulsion and its comparison against CIR-foam test results from phase three;
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Edition:Final.
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Abstract:Currently, no standard mix design procedure is available for CIR-emulsion in Iowa. The CIR-foam mix
design process developed during the previous phase is applied for CIR-emulsion mixtures with varying
emulsified asphalt contents. Dynamic modulus test, dynamic creep test, static creep test and raveling test
were conducted to evaluate the short- and long-term performance of CIR-emulsion mixtures at various
testing temperatures and loading conditions. A potential benefit of this research is a better understanding
of CIR-emulsion material properties in comparison with those of CIR-foam material that would allow for
the selection of the most appropriate CIR technology and the type and amount of the optimum
stabilization material. Dynamic modulus, flow number and flow time of CIR-emulsion mixtures using CSS-
1h were generally higher than those of HFMS-2p. Flow number and flow time of CIR-emulsion using RAP
materials from Story County was higher than those from Clayton County. Flow number and flow time of
CIR-emulsion with 0.5% emulsified asphalt was higher than CIR-emulsion with 1.0% or 1.5%. Raveling
loss of CIR-emulsion with 1.5% emulsified was significantly less than those with 0.5% and 1.0%. Test
results in terms of dynamic modulus, flow number, flow time and raveling loss of CIR-foam mixtures are
generally better than those of CIR-emulsion mixtures. Given the limited RAP sources used for this study,
it is recommended that the CIR-emulsion mix design procedure should be validated against several RAP
sources and emulsion types.
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