Characterization of low temperature mechanical properties of crack sealants utilizing direct tension test.

Details

• Creators:
  Al-Qadi, Imad L. ; Yang, Shih-Hsien ; Masson, Jean-Francois ; McGhee, Kevin K.
• Corporate Creators:
  University of Illinois at Urbana-Champaign. Department of Civil and Environmental Engineering
• Corporate Contributors:
  National Research Council Canada ; Virginia. Dept. of Transportation ; Illinois Center for Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Pavement design
  • Pavement components
  • Pavement cracking
  • Pavement layers Pavements
• Publication/ Report Number:
  ICT-08-028;ICT-08-028, UILU-ENG-2008-2016
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States;Canada
• Corporate Publisher:
  Illinois Center for Transportation
• Abstract:
  Crack sealing has been widely used as a routine preventative maintenance practice. Given its proper ; installation, crack sealants can extend pavement service life by three to five years. However, current ; specifications for the selection of crack sealants correlate poorly with field performance. The purpose of this ; research was to develop performance guidelines for the selection of hot-poured bituminous crack sealants at ; low temperature. This was accomplished by measuring the mechanical properties of crack sealant at low ; temperature and then developing performance criteria for material selection. The modified direct tension test ; (DTT), crack sealant direct tension test (CSDTT), simulates the in-situ loading behavior of crack sealants in the ; laboratory. A modified dog-bone specimen geometry, which allows specimens to be stretched up to 95%, is ; recommended. This new specimen geometry also facilitates sample preparation. Tensile force is applied to the ; dog-bone specimen, with its effective gauge length of 20.3mm, and is pulled at a deformation rate of ; 1.2mm/min. Fifteen sealants were tested at various temperatures, and three performance parameters are ; suggested as indicators of sealant performance: extendibility, percent modulus reduction, and strain energy ; density. Extendibility, which is used to assess the degree of deformation undergone by a sealant at low ; temperature before it ruptures or internal damage is observed, is recommended as a measured parameter to be ; included in the performance-based guidelines for the selection of hot-poured crack sealants. Extendibility ; thresholds were defined as function of low service temperatures. The CSDT is conducted at +6oC above the ; lowest in service temperature because of the relatively high test loading rate compared to in-situ crack sealant ; movement rate.
  More +
• Format:
  PDF
• Funding:
  VTRC Project # 67775, TPF-5(045)
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/16705/dot_16705_DS1.pdf
• File Type:
  [PDF - 4.36 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8a06aae0f3e5634dfe830a01042de7d782dd9856fbfe4aa137ed673965e9fdb5beebfeee7e6d3791563c9c1071edac737671c30211daa9f02672ca737822f912