Characterization of bituminous-sealants utilizing modified bending beam rheometer

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Conference85th Annual Meeting of the Transportation Research Board: 22 January 2006, Washington, D.C.
Pages119; # of pages: 19
Subjectroadway, pavement, maintenance, preservation, specification, sealant, testing, low temperature, stiffness, m-value, BBR, creep rate; Roads/Pavement; Pavements
AbstractEarly research showed that the current specification for the selection of crack sealants correlates poorly with field performance. To address this issue and help predict the low temperature properties of hot-poured bituminous sealants, a modified Bending Beam Rheometer (BBR) method is utilized. Eight sealants, with a wide range of rheological behaviors, were tested between ?4 and ?40°C. When the time-temperature superposition principle was used, the stiffness after 240s at a temperature T was equivalent to the stiffness after 5h of creep loading at a temperature of T+10°C. The results indicate that the stiffness of hot-poured sealant at 240s help predict low temperature behavior. In addition, the rate of stiffness change in a log-log scale (m-value) can be used to assess stress relaxation. Two additional parameters are thought toprovide a useful indication of the sealant performance at low temperature: steady-state creep rate, obtained after a 240s loading; and the average creep rate, based on deflection measurements over the 240s.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number48627
NPARC number20377745
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Record identifier1a83831c-26b1-40e2-b83b-3cefdc6e4688
Record created2012-07-24
Record modified2016-05-09
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