Eric A. Gonzalez, P.E.
Advanced Drainage Systems
South Florida Regional Engineer
FDOT Testing of Thermoplastic Pipe Materials
for 100-Year Service Life Applications
C C
H
H
H
H
C C
H
H
H
H
C C
H
H
H
H
C C
H
H
H
CH3
C C
H
H
H
C C
CH3
HH
H
CH3
Polyethylene
Polypropylene
Monomer Polymer
Thermoplastics
12" 15" 18" 24" 30" 36" 42" 48" 60"
Pip
e S
tiffn
ess
(p
si)
Pipe Diameter
HP (Polypropylene) vs N-12 (Polyethylene)
Pipe Stiffness
HP HDPE
Time (log)
Str
ess
(lo
g)
Stage I - Ductile
Stage II - Brittle
Stage III - Chemical
Failure Modes
100 Years
Finite Element Modeling
Y. Grace Hsuan, Ph.D., Timothy Mcgrath, Ph.D., P.E., Simpson Gumpertz & Heger Inc. Protocol for Predicting Long-term Service of Corrugated High Density Polyethylene Pipes, 2005
NCLS Laboratory Testing
NCLS Laboratory Testing
QA Test Methods
QA Test Methods
Time (log)
Str
ess
(lo
g)
Stage I - Ductile
Stage II - Brittle
Stage III - Chemical
Failure Modes
100 Years
OIT Laboratory Testing
OIT Laboratory Testing
OIT Laboratory Testing
FDOT Service Life Calculator
Time (log)
Str
ess
(lo
g)
Stage I - Ductile
Stage II - Brittle
Stage III - Chemical
Failure Modes
100 Years Safety Factor