Feedback aapt annual meeting technical sessions
Download
1 / 14

Feedback : AAPT - Annual meeting & technical sessions - PowerPoint PPT Presentation


  • 88 Views
  • Uploaded on

Feedback : AAPT - Annual meeting & technical sessions. 18 to 21 March 2001, Clearwater Beach, Florida,USA. Renaldo Lorio UWP Engineers. Location. The venue. Introduction. 344 delegates (44 foreigners, 2 from South Africa).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Feedback : AAPT - Annual meeting & technical sessions' - thao


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Feedback aapt annual meeting technical sessions

Feedback : AAPT - Annual meeting & technical sessions

18 to 21 March 2001, Clearwater Beach, Florida,USA

Renaldo Lorio

UWP Engineers




Introduction
Introduction

  • 344 delegates (44 foreigners, 2 from South Africa).

  • 24 Papers - 60% by research / academia and 40 % from practice (majority of papers to a certain extent related to Superpave).


Attendance
Attendance

27%

25%

17%

15%

13%

2%


Structure of the meeting
Structure of the meeting

  • Annual business meeting

  • Government Engineers Forum (GEF)

  • Four technical sessions

  • One symposium

  • Annual banquet

All the sessions were in series (no parallel or breakaway sessions)


Government engineers forum
Government Engineers Forum

  • New format (participation of all delegates)

  • Two topics :

    • Density measurements and QC/QA

    • Joint construction (especially long. joints)



Technical session i
Technical session I

This session focused primarily on volumetric considerations (esp. VMA)

  • Current Superpave specifications too limiting (coarse graded mixtures with lower than required VMA often unnecessary penalized). (Anderson et al.)

  • VMA should not be a fixed value but should be determined for each type of aggregate. (Coree et al.)


Technical session ii
Technical session II

Various topics in this session

  • Internal structure of asphalt samples compacted with SGC – different from field samples, this affects performance testing. (Tashman et al.)

  • VDOT’s PG binder database – user and producer benefits. (Haddock et al.)

  • Pavement failures due to stripping - no surprise here. Keep the water out of the pavement. !! (Kandhal et al.)


Technical session iii
Technical session III

Session devoted to bituminous binders (Bahia et al.)

  • G*/sind for rutting and G*sind for fatigue are not appropriate performance parameters - propose Jv and Np (DSR measurements).


Technical session iv
Technical session IV

Various topics in this session

  • MMLS3 – development of criteria for rutting evaluation at WesTrack. (Epps et al.)

  • New fundamental material model to describe fatigue cracking (fracture mechanics). (Roque et al.)


Symposium
Symposium

  • Some contractors are not in favour of PRS but prefer performance guarantees

  • Case study – 7% premium (additional expenditure on installation of subs. drains,smoother paving, extra compaction effort, more personnel for process control).


Closing remarks
Closing remarks

  • Superpave design system still being refined, still a way to go.

  • Remember to do the basics correctly (Kandhal’s message).


ad