committee 140 life cycle performance & cost paul tourney - chair peter denicola “you call it...
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Committee 140Life Cycle Performance & Cost
Paul Tourney - ChairPeter DeNicola
“You Call It Sustainability, We Call It Concrete Repair”
Committee 140 - Life Cycle Performance & Cost
MISSION
Provide industry guidance for decisions based on both the service extension and economic impact of concrete repairs.
GOALS
Develop technical guideline on managing the serviceability of concrete structures through a “cradle to grave” approach using preventative maintenance systems and quality concrete repairs.
Current Membership:
Committee 140 - Life Cycle Performance & Cost
Paul Tourney
Pete DiNicola
Dale Campbell
Jason Dunster
Kevin Earley
Eric Edelson
Greg Gilmor
Fred Goodwin
Joshua Hollis
Graeme Jones
Richard McGuire
Mike Parker
Chris Perego
Matt Sherman
Consulting Members:
Frank Apicella
James McDonald
Jessi Meyer
Expanded Objectives:
• Use excellent work efforts of other ICRI committees.
• Develop tools for owners and engineers to promote and justify better concrete repairs.– Decision Tree on “Cradle to Grave” of structures and the maintenance
options.
– Guidelines for use of the decision tree system.
– Provide a series of project case studies for demonstration of SLP / LCCA for optimal management of concrete structure assets.
• Liaison with ACI and ISO Committees to build consensus.
Committee 140 - Life Cycle Performance & Cost
Importance of Concrete Repair Sustainability
Type of Structure #New #Existing Grade
Highway Bridges 1,000 600,000+ C Highway Roads X 100X D- Parking Garages 400 25,000+ C Dams 10 4,000 D
Importance of Concrete Repair Sustainability
Type of Structure #New #Existing Grade
Highway Bridges 1,000 600,000+ C Highway Roads X 100X D- Parking Garages 400 25,000+ C Dams 10 4,000 D
# 1 Build new structures to last longer!
# 2 Maintain and repair existing structures to significantly extend the time to subsequent repair.
The backlog numbers are against us!!
Balance of Asset Management of Existing Structures:
Periodic Evaluations
Life Cycle CostRepair Service Life
TIME LINES of LCCA
Activity Time Line
Service Life Predictions
Cost Time Line
New
Str
uctu
re
“Birt
h Ce
rtific
ates
” Bu
ildin
g Co
de
Exis
ting
Stru
ctur
e
All D
ocum
ents
Routi
ne M
aint
enan
ceIn
spec
tions
Prev
enta
tive
Mai
nten
ance
Due
Dilig
ence
Routi
neCo
nditi
on A
sses
smen
tVi
sual
Cont
amin
ation
Corr
osio
nCr
acki
ngDe
grad
ation
Service Life Expectation
Threshold damage
Safety , Code, ADA
Plan
ned
Mai
nten
ance
(Rep
eat)
Insp
ectio
n (R
epea
t)Repair , Restoration
Option 1
Option 2
Option 3
Option 4
Reus
e
Salv
age
Hist
oric
Pre
serv
ation
Alte
rnat
e Us
e
$SLMSLM
Mai
nten
ance
Pla
n
Quality Control / Assurance
Deat
hDe
mol
ition
Abat
emen
tDi
spos
al
Service Life Expectation
Repa
ir
TIME LINES of LCCA
Life Cycle Costing
Net Present Value (NPV)
NPV = Today Cost /(1 + Effective Interest Rate (i)) **(years from today)
• What is the $$$ needed to put away today to take care
of facility for the expected service life?
• Related to the opportunity cost. General rules.
– Dollars spent in the future is lower cost than dollars spent today.
• Higher the interest rate the greater the premise.
– Dollars NOT spent today will result in high Life Cycle Costs.
Life Cycle Cost Analysis (LCCA)
NPV = [$X/ (1+i)T1 + $Y/ (1+i)T2 + $Z/ (1+i)T3]
$X$Y
$Z
T1T2
T3
Discount Rate = i
NPVLife = [$U/ (1+i)T1 + $V/ (1+i)T2 + $W/ (1+i)T3] + ….
$V
T1
Discount Rate = i
Today
$W $X $Y $Z$U
T2T3
T4T5
T6
New
NPVToday = [$U + $V/ (1+i)T3-T2 + $W/ (1+i)T4-T3] + ….
Life Cycle Cost Analysis (LCCA)
End of Serviceability
Repairs
NewConstruction
ChlorideContamination
Period
CorrosionInitiation
CorrosionDamage
I
X
TIME
Dam
age
3
4
2
RepairedDamage
Case 1
Ref. Tuutti
End of Serviceability
Repairs
NewConstruction
ChlorideContamination
Period
CorrosionInitiation
CorrosionDamage
I
X
TIME
Dam
age
3
4
2
RepairedDamage
Current Cost
Ref. Tuutti
Co
st
Case 1
Ref. Tuutti
Co
st
I
X
TIME
Dam
age
3
4
2
Today
NewT
0.30.4
0.50.6
+5 +5 +525
NPVLife = 0.168
NPVToday = 1.024
End of Serviceability
i = 7.5%
Case 1
I
End of Serviceability
Repairs
NewConstruction
ChlorideContamination
Period
CorrosionInitiation
CorrosionDamage
RepairedDamage
X
TIME
Dam
age
Case 2
Ref. Tuutti
Ref. Tuutti
Co
st
I
End of Serviceability
Repairs
NewConstruction
ChlorideContamination
Period
CorrosionInitiation
CorrosionDamage
RepairedDamage
X
TIME
Dam
age
Current Cost
Case 2
Ref. Tuutti
Co
st
I
End of ServiceabilityX
TIME
Dam
age
Today
NewT
25
0.7
NPVLife = 0.115
NPVToday = 0.70
i = 7.5%
Case 2
P
End of Serviceability
Repair
NewConstruction
ChlorideContamination
Period
CorrosionInitiation
CorrosionDamage
X
TIME
Dam
age
I
P
PreventativeMaintenance
Case 3
Ref. Tuutti
Ref. Tuutti
Co
st
P
End of Serviceability
Repair
NewConstruction
ChlorideContamination
Period
CorrosionInitiation
CorrosionDamage
X
TIME
Dam
age
I
P
PreventativeMaintenance
Current Cost
Case 3
Ref. Tuutti
Co
st
P
End of Serviceability
TIME
Dam
age
I
P
PreventativeMaintenance
Today
NewT
0.3
+1012 58
NPVLife = 0.089 [Case 1 = 0.168] [Case 3 = 0.115]
NPVToday = 0.146 [Case 1 = 1.024] [Case 3 = 0.70]
i = 7.5%
0.10.1
Case 3
Life Cycle Cost Comparison
NPV (Life) NPV (Today)
Case 1 0.168 1.024
Case 2 0.115 0.700
Case 3 0.089 0.146
New
Str
uctu
re
“Birt
h Ce
rtific
ates
” Bu
ildin
g Co
de
Exis
ting
Stru
ctur
e
All D
ocum
ents
Routi
ne M
aint
enan
ceIn
spec
tions
Prev
enta
tive
Mai
nten
ance
Due
Dilig
ence
Routi
neCo
nditi
on A
sses
smen
tVi
sual
Cont
amin
ation
Corr
osio
nCr
acki
ngDe
grad
ation
Service Life Expectation
Threshold damage
Safety , Code, ADA
Plan
ned
Mai
nten
ance
(Rep
eat)
Insp
ectio
n (R
epea
t)Repair , Restoration
Option 1
Option 2
Option 3
Option 4
Reus
e
Salv
age
Hist
oric
Pre
serv
ation
Alte
rnat
e Us
e
$SLMSLM
Mai
nten
ance
Pla
n
Quality Control / Assurance
Deat
hDe
mol
ition
Abat
emen
tDi
spos
al
Service Life Expectation
Repa
ir
TIME LINES of Service Life