Jerry Peterson, Construction Division

Slides:



Advertisements
Similar presentations
Karl Zipf DelDOT February 2014
Advertisements

Advanced Asphalt Technologies, LLC “Engineering Services for the Asphalt Industry” WHRP Project Effect of Recovered Binders from Recycled Shingles.
SuperPave Asphalt Specifications
Department of Civil and Environmental Engineering University of Illinois at Urbana-Champaign Alex Apeagyei Prof Bill Buttlar Prof Barry Dempsey Development.
In the United States, there are an estimated 250 million registered vehicles traveling on four million miles of public roads. With such a large volume.
Innovations in HMA Performance Testing John D’Angelo D’Angelo Consulting, LLC Canadian User Producer Group for Asphalt.
Adding and Subtracting FRACTIONS!!!!
QUICK MATH REVIEW & TIPS 1
Adding and Subtracting Fractions
Adding, Subtracting, Multiplying, and Dividing
Types, Properties and Grades of Asphalt-Part B
Warm Mix Asphalt Yellowstone National Park Brad Neitzke Western Federal Lands Highway Division.
Systems of Linear Equations Examples Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB.
HUSKY ASPHALT 1-2-3’s of PGAC Calgary Presentation August 14, 2006.
Significant Figures There are two kinds of numbers in the world: Exact
Cracking the English Test. General Hints Do the questions in order, leaving the tougher rhetorical questions for the end. If you’re having trouble with.
Warm-Up 4/30 Answer: $62, $60, Logarithmic Functions  The inverse of y = b x is _______  The function x = b y is called a___________.
Mr Barton’s Maths Notes
Cliff Shaffer Computer Science Computational Complexity.
Mihai Marasteanu & Adam Zofka Summary of Shingles Work at the University of Minnesota.
NP-COMPLETE PROBLEMS. Admin  Two more assignments…  No office hours on tomorrow.
Solution of. Linear Differential Equations The first special case of first order differential equations that we will look is the linear first order differential.
3.1-Addition and Subtraction with Fractions Catherine Conway Math 081 Catherine Conway Math 081.
By: Chloe Peterson and Kaylee Seidel Woodland Elementary 4 th Grade.
Grading The report of group 9. Making the Grades summary Students tend to ask for a better grade when they don’t get what they want. Many students coming.
DISSIPATED ENERGY STUDY OF FATIGUE IN AIRPORT PAVEMENTS PHD Candidate: Shihui Shen Advisor: Prof. S. H. Carpenter FAA Project Review Nov. 9, 2005.
February 5, Fatigue of Asphalt Mixtures, Endurance Limit, Polymer Modifications, Healing 1.E+02 1.E+03 1.E+04 1.E+05 1.E-07 1.E-05 1.E-03 1.E-01.
TOOL CHECK. Adding and Subtracting FRACTIONS Unit 4 Lesson 4.
Using Reflective Crack Interlayer-
Pre-Algebra Tutorial. Pre-Algebra Equations x + 3 = 5 What is the value of x? At first glance this may look easy since all you have to ask yourself is.
6th China Asphalt Summit
Asphalt Technology Course
Mr Barton’s Maths Notes
Welcome to RHHS.
Accuracy and Precision Measurements Significant Figures (Sig Figs)
Introduction to Quantitative Research
Mr Barton’s Maths Notes
Conversions Unit 2 - Math.
Skills for Science with a focus on Biology.
Uncertainty in Water Industry?
Evaluation of Cracking Resistance and Durability of 100% Reclaimed Asphalt Pavement Mixtures Hesham Ali, PhD, PE. Mojtaba M. Afzali.
Locating the image for lenses
Statistical Data Analysis - Lecture /04/03
Factor the following completely:
Conversions Unit 2 - Math.
May 12th – Minimum Spanning Trees
TxDOT Implementation Project Darren Hazlett, Jerry Peterson
Systems of Linear Equations
Last Class We Covered Sorting algorithms Searching algorithms
Fractions Any fraction can be written in many ways and still have the same value… …are all the same… 0.5.
Mr F’s Maths Notes Number 6. Fractions.
Presenters: Sumon Roy1 and Badrul Ahsan1
Cracking the English Test
Cracking the English Test
Factor the following completely:
Common mistakes that we usually do
Innovative Construction Materials PM: Yusuf Mehta
Chapter 3 - Measurements
2018 Pavement Workshop May 23-24, 2018
Dr. Randy West, P.E. Director / Research Professor
Effect of Recovered Binder From Recycled Shingles
Mr Barton’s Maths Notes
ECE 352 Digital System Fundamentals
Relations And Functions.
Relations And Functions.
Superpave5 Superpave Design at Five Percent Air Voids
Finding a “Just Right” Book
Rethinking PP Timing Strategies
What you need to know: It is required to know how to perform addition, subtraction, multiplication, and division with fractions. First, you understand.
1.4 Subtraction of Real Numbers
Presentation transcript:

Jerry Peterson, Construction Division ΔTC and You Jerry Peterson, Construction Division

Stiffness and m-value Parameters from Bending Beam (BBR) Creep Stiffness (“S” or “S-value”) m-value (relaxation parameter)

Using S and m-value Spec limits S < 300 MPa m > 0.300 Temperature depends on grade Test at grade temperature +10°C (example PG64-22 at -12°C)

Using S and m-value Easiest: verifying a grade Test at required temperature Pass/fail Unknown Grade Run test at grade increments of 6°C Lowest temperature where BOTH pass Subtract 10°C from test temperature Don’t care about values of S and m are, only pass or fail

Critical Temperature Also known as “TC” “Exact Grade” or “Truegrade” Find temperatures where S and m are equal the spec limits Highest (worst) one determines grade (Remember: negative temperatures so smallest number is highest) “m-controlled” vs “S-controlled” Other parameter is thrown out

Critical Temperature m = 0.3 m-value log S S = 300MPa Temperature TC for S m = 0.3 TC for m m-value

Critical Temperature Notes on spec development (SHRP) TC about equal for S and m-value BBR originally aimed at thermal cracking Later Observations Bigger differences is TC Related to performance?

In comes ΔTC ΔTC = TC,m – TC,S Negative number means m-controlled Research on the subject ΔTC is very negative in recycled binders (Reinke) ΔTC gets more negative with aging (Reinke) ΔTC seems to be related to other things REOBS (Zhou) Overlay Tester (Zhou) SARA Fractions (Zhou)

Will we use it? ΔTC seems to help identify some things that may be important “Incompatible” asphalt REOBS, and other extenders (when overused) Aged and poorly aging asphalt Poor blends with recycled material All of these issues without requiring or banning particular materials It’s got our attention

How to Implement? National recommendation (Reinke) ΔTC after 40 hr PAV > -5°C Problems Maybe not realistic for out asphalt supply Lots of extra time and tests

How to Implement? Replace BBR with 4 mm DSR Testing takes less material and is faster Problems Still need to development to figure out 4mm DSR Still takes 40 hr

How to implement? Aging correlation Find a fudge factor to convert ΔTC from unaged Eliminates long term aging Can maybe use regular DSR instead of BBR Needs lots of work!

How to Implement? Estimate TC from one point Still needs development and might not work well Put a minimum on S No extra testing Easy to understand

Soft Implementation You can already see this a little bit:

Conclusions ΔTC looks promising Don’t know what limits should be yet Evaluate binder supply Settle on testing methodology Additional research needed Time frame? Can’t say yet Likely not this year, unless it’s the Beetle