hot mix gone wild · 2017-01-04 · district: 16 county: kleberg project: stp 2010(828) control:...
TRANSCRIPT
Hot Mix Gone Wild Ernie De La Garza, P.E. Corpus Christi District
Project Facts District: 16 County: Kleberg Project: STP 2010(828) Control: 0102-06-029 Length: 12.068 Miles Type: Overlay Roadway Limits: From Brooks County Line to US 77 Cost: $2,420,230.18 Let Date: April 2010 ADT: 10238, % TRK ADT 16%, ESAL 4 MIL
Location Map
Typical Sections
Typical Sections
Typical Sections
Develop Approach Step 1: Drive to project and take photos Step 2: Gather information and ask questions Step 3: Test to verify Step 4: Conclusion / Solutions Step 5: Lessons Learned
Step 1: Drive to project and take photos During Construction
After Construction (Project Accepted 2/11)
During Construction
During Construction
During Construction
During Construction
During Construction
During Construction
During Construction
After Construction
After Construction
After Construction
After Construction
After Construction
Step 2: Gather information and ask questions Material Hot mix production data Hot mix placement data Personnel Contractor / Inspector / Area Engineer /
Maintenance Forces Get the Story
Hot Mix Production/Placement Data
Type "D" CA - Martin Marietta Limestone Beckmann
FA - Wrights Material Sand FM 3088 RAP -1/2" Fractionated
Asphalt - PG 64-22S NuStar Asphalt Content: Contr= 5.2% Txdot= 5.1%
Sieve #8: Contr= 37.5% Txdot= 37.2% Sieve #200: Contr= 6.1% Txdot= 6.4%
Density: Contr= 97.1% Txdot= 97.0% Ga: Contr= 2.340 Txdot= 2.338 Rice Gravity: Contr= 2.409 Txdot= 2.409
Air Voids: 7.2%
Hot Mix Production/Placement Data Segregation profile 17 lots (avg. 136.3, avg.
high to low 2.4, avg. to low 1.2 pcf) Joint density avg. confined diff. -2.0, avg.
unconfined diff. -2.4 Thermal profile avg. temp diff. 7 degrees F
Personnel Contractor Area Office Maintenance Office CST Division
Get the story and ask questions
Step 3: Test to verify story Core
GPR
FWD / LAB
Core that Bonded
Core After Failure
Core After Failure
GPR
K1, Inside lane only
RM540 RM542
Riviera SH 285 East Bound
Extra depth? Maybe not milled? Maybe extra layer in Original structure?
Cold Mix + overlay?
FWD / LAB Subgrade (Sandy/Clay) Sta. 151+00
Classification 3.6 Subgrade (Sandy/Clay) Sta. 396+00
Classification 4.1 Subgrade (Sandy/Clay) Sta. 500+00
Classification 3.7
FWD / LAB
Step 4: Conclusion /Solutions Short Term Solution
Long Term Solutions
Short Term Solution
Short Term Solution
Short Term Solution
Short Term Solution
ID Repair Sections
ID Repair Sections
Good Patch
Good Crews (Kleberg Maintenance is #1)
Cannot Keep Up!
Long Term Solution? Evaluate how patches are holding up to see if
a mill and overlay will work Possibly consider reconstruction for a
majority of the project if underlying layers do not hold up
HIR maybe?
Step 5: Lessons Learned Preliminary evaluation is critical
IDP- Inform inspectors
Production Adjustments- Use all of your lab
tools
Questions Ernesto De La Garza, P.E. Corpus Christi District Lab [email protected]