Investigation into the effects of filler on the mechanical behavior of bituminous mortar

The work presented in this article investigates the effect of filler type and filler amount on the mechanical properties of bituminous mortar. The mortar comprises of filler, binder and fine fractions of sand. As a base binder three kinds of polymer modified hinders were considered. The variables for the fillers included hydrated lime, backhouse fines and filler amount in mortar. For each binder type seven different filler combinations were selected resulting in a total of 21 mortar types. The mortars were then subjected to a 1000 hour long term aging in a weatherometer. Then, the mechanical behavior of the aged mortars was investigated using Dynamic Shear Rheometer (DSR). For DSR testing, a special test geometry developed for mortar testing was utilized. For the various mortars, master curves were constructed at a selected reference temperature using time-temperature superposition principle. Based on the master curve results, the effects of varying the type and amount of filler were analyzed. Analysis of the results showed that the use of hydrated lime resulted in stiffening effect for two of the three hinders. Increase of the filler amount resulted in increase of complex modulus. The use of backhouse fines resulted in a decrease of complex modules at high temperatures. The observed effects were generally binder dependent.

Language

  • English

Media Info

  • Pagination: pp 677-686
  • Monograph Title: Bearing capacity of roads, railways and airfields: proceedings of the ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields: Trondheim, Norway 25-27 June 2013. Vol 1-2

Subject/Index Terms

Filing Info

  • Accession Number: 01596565
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • ISBN: 9788232102853
  • Files: ITRD, VTI
  • Created Date: Apr 21 2016 12:31PM