Emulsion treated base as a stabilization practice
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Footer Text Date EMULSION TREATED BASE AS A STABILIZATION PRACTICE Brett Haggerty, PE SAT Materials & Pavement Engineer Date
Transcript of Emulsion treated base as a stabilization practice
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EMULSION TREATED BASE AS A STABILIZATION PRACTICE Brett Haggerty, PE SAT Materials & Pavement Engineer
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Table of Contents
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32-44
45-41
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Text Layouts
Tables
Box Layouts
Charts
Diagrams
Maps
Color Scheme and Useful Objects
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Emulsion Treated Base (EET)
Full Depth Reclamation process that combines emulsion, existing pavement
– Potential addition of add rock, additives (cement/lime/fly ash), water
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EET Process
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EET – Why should I be paying attention?
San Antonio Energy Sector:
– Need more structure
– Can’t raise the profile in most cases
– Limited TCP options
In general terms, looking for options that are:
– Cheap
– Fast
– Durable
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Cheap?
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Item (2013 project) Unit Price Unit Notes
Emulsion Treatment Existing (8in)
$4.06 SY
Emulsion $3.18 GAL 4 gal/sy
Subtotal (8in) $16.78 SY
Item (August 2015 low bid) Unit Price Unit Notes
Cement Treat Existing (8in) $1.78 SY
Cement $147.48 TON 3% typical application
Subtotal (8in) $3.57 SY
Item (August 2015 low bid) Unit Price Unit Notes
Remove 8in $2.44 SY
New Base $47.38 CY
Cement Treat New (8in) $1.64 SY
Cement $147.48 TON 3% typical application
Subtotal (8in) $15.95 SY
Item (August 2015 low bid) Unit Price Unit Notes
Remove 8in $2.44 SY
Type B (PG64-22) $62.38 TON
Subtotal (8in) $29.89 SY
Reclamation Replacement
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Cost/Speed Replacement costs did not include:
– Staging area issues
– Reduced lengths of construction that extend construction time
FDR becomes more appealing when addressing phasing
– EET allows for roadway to be open by end of the day
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Durability - stiffness
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Project District Seismic
Modulus (ksi, 1 day cure)
FWD Modulus (ksi, 2 day cure) Additives
SH16 San Antonio 262 N/A 5% emulsion
FM479 San Antonio
232 N/A 4% emulsion 1% cement
408 N/A 5% emulsion 2% cement
487* N/A 6% emulsion 2% cement
US287 Amarillo 291 207 6% emulsion 3% flyash
FM740 Dallas 360 N/A 4% emulsion 1% cement
* - 7 days after treatment
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Durability - Benefit
Shrinkage cracks not an issue, as compared to cement treatment with no micro-cracking
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San Antonio Most Recent Project
Frio County in the heart of Energy Sector
Let in July 2013
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SH85
Narrow roadway with high % of trucks
Can’t raise elevation a significant amount (flood plains), needed to keep open to traffic to prevent excessive cost for detours
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SH85
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SH85
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Good
Not So Good
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SH85
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Good
Not So Good
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SH85 Need to address fluctuation in base thickness
Iterative testing to optimize material modifications
– Increased emulsion content
– Added Cement
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SH85
Finished final surface at end of Summer 2014
Movie 1
Movie 2
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Questions
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