Evaluation of dynamic shear rheometer tests for emulsions.

Details

• Creators:
  Wasiuddin, Nazimuddin ; Ashani, Saeid S. ; Islam, M. Readul
• Corporate Creators:
  Louisiana Tech University. Department of Civil Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Asphalt Emulsions Creep Tests Ductility Elasticity (Mechanics) Rheological Properties Shear Modulus Test Procedures Viscosity
• Publication/ Report Number:
  FHWA/LA.13/519;LTRC Project Number: 11-2B;State Project Number: 30000163
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana. Dept. of Transportation and Development
• Abstract:
  DSR-based rheological tests of 20 different
  
  asphalt emulsion residues were
  
  performed and relationships
  
  with elastic recovery (A
  
  ASHTO
  
  T301) and force ductility (AASHTO T
  
  300) were investigated. In stra
  
  in sweep test from 2% to 52%
  
  , it was observed that emulsions
  
  prepared of hard pen base asphalt have rela
  
  tively lower strain tolerances. Using fre
  
  quency sweep data, complex modulus master c
  
  urves
  
  were constructed at 25°C to understand overa
  
  ll rheological behavior. Temperature sweep
  
  of phase angle from 52°C to 94°C showed
  
  that a
  
  maximum phase angle in the range of 75° to 85° may be used as
  
  a criterion for polymer identification. MSCR (AASHTO TP70) at 58°
  
  C
  
  has been recommended to replace th
  
  e elastic recovery test (AASHT
  
  O T301). At 0.1kPa creep stress,
  
  a minimum percent recovery of
  
  25
  
  and at 3.2kPa, a minimum percent recovery of
  
  9 are recommended to identify the presence of polymer replacing elastic recovery t
  
  est
  
  (AASHTO T301). Also, percent recovery of MSCR and ph
  
  ase angle can be used to
  
  replace force ductility
  
  requirements (AASHTO
  
  T300). It is recommended that at 58°C, a maximum phase a
  
  ngle of 81° and a minimum MSCR percent recovery (at 0.1kPa
  
  creep stress) of 30 can be specified to
  
  replace the force ductility
  
  test (AASHTO T300). These criteria are applicable for
  
  emulsion residues prepared according to the low temperature evaporative method specified in ASTM D7497. However, a
  
  comparative study among ASTM D7497 (24 hr at 25°C and 24 hr at 60°C), ASTM D6934 (3 hr at 163°C), AASHTO TP 72
  
  Method B (6 hr at 60°C), vacuum dry method (6 hr at 60°C, a method developed in this study) and field curing have been
  
  performed in order to develop a low temperature low duration
  
  recovery method. It was observed that the MSCR test on
  
  residue prepared with the vacuum dried method can be used
  
  for polymer identification replaci
  
  ng elastic recovery and force
  
  ductility tests. Finally, the current specification viscosity range for low and high viscous emulsions using the saybolt furol
  
  viscometer to ensure quality control an
  
  d quality assurance can also be replaced
  
  by the rotational viscometer. The ranges
  
  recommended are 220 - 730 cP and 5 – 90 cP (gives 98% probability) at 50 rpm and 30°C for high and low viscous
  
  emulsions, respectively
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:b6f87579b57dfb836a1c5f34f7d648b8f98bb14057216ed5cf7b21e4512dba34ad419973a2a9915396a5aa1111d5d160cf52343734770b6045cd760d032d318d
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28301/dot_28301_DS1.pdf
• File Type:
  [PDF - 3.99 MB ]