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ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
EVALUATING THE PERFORMANCE OF NEW AND IN-SERVICE PAVEMENTS IN ITALY USING HIGH-SPEED
NON-DESTRUCTIVE TESTING
Ing. Stefano Drusin s.drusin@stradeanas.it
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
ANAS Company Profile Key facts & figures
Established in 1928
Joint-stock company (100% property of Ministry of Treasury)
Quality certified (e.g. UNI ISO 9001/2000 and 17020/2005)
Share Capital: 2,269,892,000 Euro
Turnover: 2,900,000,000 Euro (in the last 5 years)
Employees: 6,700 (6,500 in Italy)
Managed Road/Motorway network : 25,000 km
Pag. 2
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
ANAS Company Profile
Mission
Managing Italian national road network
Construction of new highway and motorways
Maintenance of the national road and motorway network
Works Supervision on all road works
Study and research on safety and road maintenance
Pag. 3
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 4
Research and Innovation ANAS invests significant resources in research and innovation in all road related activities (materials; road safety; road management, etc.)..
The Cesano National Research Centre is the scientific, and technical heart of ANAS setting standards, quality criteria and best practices for the entire road infrastructure
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 5
ASPHALT CONCRETE
LABORATORY
CONCRETE AND STEEL LABORATORY
SOIL AND ROCK LABORATORY
VERTICAL AND HORIZONTAL SIGN
LABORATORY
HIGH SPEED SURVEY
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 6
ROAD PAVEMENTS have been deeply changed due to the SCIENTIFIC EVOLUTION in this field
STARTING FROM EMPIRICAL SOLUTIONs BASED ON EXPERIENCE PAVEMENTS EARNED THE DIGNITY OF SCIENCE
THIS IS ANAS PERFORMANCES
BASED METHODOLOGY 2013
PAVEMENTS ARE NOW TREATED SUCH AS A PROPER STRUCTURE TO BE DESIGNED
not only in terms of materials, thickness, etc BUT MAINLY IN TERMS OF PERFORMANCES TO BE
GAINED IN THE FIELD
DESIGN
LAYING CONTROL
PERFORMANCEs PROVIDED BY CONTRACTORS MUST BE VERIFIABLE
IN EACH PART OF THE WORK
1928
DESIGN
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 7
ANAS network about 25.000 Km
Evaluation of Actual Network Condition
Pavement Design
Testing and Approval of Works
Maintenance of existing road
New road construction
All step integrated in the ANAS management
system based on performance evaluation
Pavement Construction
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
1- STEP OF EVALUATION OF THE ACTUAL NETWORK CONDITION TROUGH THE HIGH EFFICENCY SURVEY
3 - STEP OF PAVEMENT CONSTRUCTION
2 - STEP OF PAVEMENT DESIGN FOR NEW CONSTRUCTION OR FOR MAINTENANCE OF EXISTING PAVEMENT
4 - STEP OF QUALITY CONTROL TROUGH THE HIGH EFFICENCY SURVEY FOR FINAL APPROUVAL OF WORK
Pag. 8
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 9
The ANAS Management System is based on Performance Indicator (PI)connected to Technical Parameter (TP)
The PI is a non-dimensional measurement unit, which varies from 0 to 100, and measures the DIFFUSION of the TP that is under evaluation.
Its distribution, in the different levels of QUALITY of the TP, defines the state of the pavement
An illustrative example for the TP “skid resistance” clarifies the concept
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
TECHNICAL PARAMETER In this example SKID NUMBER CAT
QUALITY LEVELS
A B C D E
Excellent Good Medium Sufficient Bad
The averaged diffusion of the different levels represent the Performance Indicator of skid resistance
ANAS formula to averaged this diffusion could be
I CAT= f (A+3/4B+1/2C+1/4D)
A% --------> Percentage of pavement at level A B% --------> Percentage of pavement at level B C% --------> Percentage of pavement at level C D% --------> Percentage of pavement at level D etc.
Pag. 10
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
ICAT = Performance Indicator of skid resistance In this way the index varies from 0 to 100
IF A = 100% I CAT = 100 IF A,B,C,D = 0% I CAT = 0
Following the suggested formula:
I CAT= f (A+3/4B+1/2C+1/4D)
Pag. 11
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 12
The ANAS Management System is based on measurement of the overall Quality of the road starting from the Technical Parameters.
ANAS proposes the today best technology to fast measure each parameters taking into account environmental and traffic constraints.
Technical Parameters are measured trough the HIGH SPEED EQUIPMENT that measure the road on site, continuously, with high accuracy, high speed, and extremely low impact on traffic.
The ANAS Management System is based on performance indicator (PI)
For each evaluation more than one parameter is needed, for example the pavement parameters are:
NEW
• Roughness
• Bearing Capacity
• Distresses
• Traffic Noise
• Skid Resistance
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 13
TP PAV
ERMES ROUTINE EVALUATION OF MACROTEXTURE, EVENNES AND SKID RESISTANCE
FWD - “FALLING WEIGHT DEFLECTOMETER”
TSD - TRAFFIC SPEED DEFLECTOMETER
HORIZONTAL SIGN FSD Dynamic Road Phonometer
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
TRAFFIC SPEED DEFLECTOMETER
BEARING CAPACITY COLLECTED AT HIGH SPEED
NON-DESTRUCTIVE TESTING
NEW
IN CONNECTION WITH “SLOW” FWD TEST
Pag. 14
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
ANAS HAS DEVELOPED Since 2009 THE USE OF
TSD FOR FINAL APPROVAL OF
WORK
FIRST INTERNATIONAL TSD TRIAL IN DENMARK
2013 DENMARK 1° TSD
ITALY AUSTRALIA POLAND
Pag. 15
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
DEPENDS ON CONTRIBUTION BY ALL DIFFERENT LAYERS
PROVIDES INDICATIONS ON THE BC OF SUBGRADE
BEARING CAPACITY IS THE RESULT OF EACH COMPONENT
such as MATERIAL, LAYERS, THEIR INTERACTION
INCLUDED ANY CRACK INSIDE THEM
THE SHAPE OF DEFLECTIONS BASIN
… DEFLECTIONS FARREST FROM THE LOAD (D1500)
Pag. 16
BEATRING CAPACITY MEASUREMENT
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
DEFLECTION BASINS CAN BE MEASURED WITH
TWO ALTERNATIVES EQUIPEMENTS
F.W.D. FALLING WHEIGHT DEFLECTOMETER
T.S.D. TRAFFIC SPEED DEFLECTOMETER
FWD and TSD measure same parameter by different systems and different speed.
850 KPa
Pag. 17
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 18
Measuring Pavement Bearing Capacity with Traditional System
D200
D300
D900
D1500 D
0
IS300 = D0 - D300 IS200 = D0 - D200
RP control Deep repair
RS control Surface repair
adjusted to consider the deformability of the substrate
Applied stress load (1700 kPa) to simulate traffic conditions Recorded air temperature at each measurement
( )testing
testing
TC
T
C eISIS −×° = 1414
IS indexes are corrected and reported to standard conditions (14 ° C)
Ttesting = Tair (easy to evaluate).
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Pag. 19
IS300 = D0 - D300
IS200 = D0 - D200
RP control Deep repair
RS control Surface repair
Stress load is applied continuously by a 12 tons loaded wheel rolling at 80 km/h Multiple temperature recordings
CALCULATED VALUES ARE THE SAME
MEASUREMENTS ARE CONTINUOUSLY RECORDED (1 m)
AND AVERAGED EVERY 10 m
Measuring Pavement Bearing Capacity with ANAS TSD
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Connessione via modem o diretta
ANAS s.p.a. - Codirezione Generale Tecnica - Unità Ricerca e Innovazione – Centro Sperimentale Stradale
Siti sperimentali e risultati ottenuti
SS1 “Aurelia” km 23.500
WIM
and temperature
sensors
Pag. 20
INFLUENCE OF TEMPERATURE
10
15
20
25
30
35
40
45
50
55
60
01/08/2009 0.00 06/08/2009 0.00 11/08/2009 0.00 16/08/2009 0.00 21/08/2009 0.00 26/08/2009 0.00 31/08/2009 0.00
Temp_10cm_AvgBELLS3Tpav from air
10
20
30
40
50
60
70
14/08/20090.00
14/08/200912.00
15/08/20090.00
15/08/200912.00
16/08/20090.00
16/08/200912.00
17/08/20090.00
17/08/200912.00
18/08/20090.00
18/08/200912.00
19/08/20090.00
Temp_aria_Avg Temp_superfice_Avg
Temp_05cm_Avg Temp_10cm_Avg
BELLS3 Tpav from air
Temp_15cm_Avg Temp_20cm_Avg
10
20
30
40
50
60
70
14/08/20090.00
14/08/200912.00
15/08/20090.00
15/08/200912.00
16/08/20090.00
16/08/200912.00
17/08/20090.00
17/08/200912.00
18/08/20090.00
18/08/200912.00
19/08/20090.00
Temp_10cm_Avg
BELLS3
Tpav from air
IS300 versus Tair
0
20
40
60
80
100
120
140
160
180
200
0 5 10 15 20 25 30 35 40 45 50Tair (°C)
IS30
0 (m
icro
n)
IS-Tair ANAS c=0.037
IS-Tair ANAS c=0.022
IS-Tair Baltzer and Janzen
IS-Tair b English Standard HD 29/08
ANAS for RSC=0.022
ANAS for RPC=0.037
from Baltzer and Janzen
English standard
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
NON RESTRICTED (VALID) AREA required by the acceptance RESTRICTED AREA RESTRICTED
AREA
ACCEPTANCE CURVE
BEARING CAPACITY ASSESSMENT’S CRITERIA
EXAMPLE
PENALITY
ACCEPTED
AVERAGE VALUES IS FALLING WITHIN “ VALID AREA” - IF HIGHER THAN FIXED ONES WILL BE UNDER PENALTY - IF LOWER THEY WILL BE ACCEPTED
- DESIGNED IS300 VALUE IS CALCULATED FOR THE PAVEMENT STRUCTURE
DESIGNED IS300
- SINCE IS300 IS AFFECTED BY TEMPERATURE
SOME TEMPERATURE CONSTRAINTS MUST BE CONSIDERED
Pag. 21
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
BEARING CAPACITY and FATIGUE LIFE ARE CHECKED WITH ONE SINGLE HIGH PERFORMANCE TEST
NEW CURVES IN PROGRESS FOR IS COMPLIANCE VERIFICATION Present acceptance curves IS showed troubles in case of excessive use of recycled materials (RAP)
Very strong pavements showed very low values of Is with negative influence on long term perfomance and reduction of residual life
Due to this Is acceptance curve have been adjusted to be sure that designed fatigue life of mixes will be obtained
IS
Pag. 22
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
1,000 10,000 100,000 1,000,000 10,000,000
TEN
SIO
NE
APPL
ICA
TA σ
daN
/cm
q
CICLI A ROTTURA
CURVE DI FATICA
FATIGUE RESISTANCE IS CHECKED COMPARING VARIOUS MIXES WITH A REFERENCE ONE – THE GREEN ONE
FATIGUE OF MIXES IS TESTED BY ITS TESTS BASED ON
SINUSOIDAL LOAD AT 10Hz AND 20 °C Air Temperature
Pag. 23
FAST ANAS MEASUREMENT OF FATIGUE LIFE
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
TO PREVENT CONTRATORS FROM USING TOO RIGID MIXES WITH LESS DEFORMABILTY BUT LESS RESIDUAL LIFE, A LOWER ACCEPTANCE CURVE WAS ADDED TO THE UPPER ONE.
IS VALUES INCLUDED IN AREA “A” ARE NOT ACCEPTABLE
NEW CURVES IN PROGRESS FOR IS COMPLIANCE VERIFICATION
IS VALUES INCLUDED IN AREA “B” ARE ACCEPTABLE
IS VALUES INCLUDED IN AREA “C” ARE UNDER PENALTY OR FATIGUE TEST ON CORES MUST BE REPEATED (by comparison)
A
B
C
Pag. 24
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
LET’S GO BACK TO THE MANAGEMENT OF PARAMETERS DETECTED
1. EVALUATION OF HOMOGENEOUS SECTION BY SPECIFIC SOFTWARE
2. DISTRIBUTION OF QUALITY LEVELS ON THE ROAD
3. DESIGN OF MAINTENANCE
5. PUNCTUAL CONTROL OF RESULTS OBTAINED WITH THE WORKS
4. WORKS
Pag. 25
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
1 - RESULTS PROCESSED TO FIND HOMOGENEOUS SECTIONS NAMELY SECTIONS SHOWING “STABLE” VALUES
SINGOL VALUES IS NOT SIGNIFICANT
REQUIRED VALUE
PENALTY
SINGOL VALUE AVERAGE VALUE OF SECTION
THE AVERAGE VALUE (OF EACH SECTION) INSTEAD MUST COMPLY WITH REQUIRED ONES
Pag. 26
GOOD
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
IS300 (14°C Tair)
0
50
100
150
200
250
300
39000 40000 41000 42000 43000 44000 45000 46000 47000 48000 49000Chianage (m)
Excellent
Good
Medium
Sufficient
Poor
Very poorTECHNICAL PARAMETERHOMOGENEOUS SECTION
Existing pavement
Accepted
Accepted with
penalty
Rejected
Newworks
Pag. 27
2. DISTRIBUTION OF QUALITY LEVELS ON THE ROAD
I bc = 36,25 MANAGING INDICATOR is I bc = 25 + ¾ 15 = 36,25
EXISTING PAVEMENT OF 2 KM
IS300 (14°C Tair)
0
50
100
150
200
250
300
39000 40000 41000 42000 43000 44000 45000 46000 47000 48000 49000Chianage (m)
Excellent
Good
Medium
Sufficient
Poor
Very poorTECHNICAL PARAMETERHOMOGENEOUS SECTION
Existing pavement
Accepted
Accepted with
penalty
Rejected
Newworks
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
BEARING CAPACITY OF THE NETWORK IS REGULARLY INVESTIGATED
25.000 Km
«Premium network» IBC80,1 (100)
LEVELS of IS30014°C
Very Poor Excellent Good Medium Poor Sufficient
PERFORMANCE INDICATOR IBC IS CALCULATED
Pag. 28
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
ReportS
Google MAPS
DISTRIBUTION OF PERFORMANCE INDICATOR USING GEOGRAFICAL REPRESENTATION
3. DESIGN OF MAINTENANCE
ROAD EYE Software
LOCATION AND IDENTIFICATION OF OPTIMAL MAINTENANCE SUPPORTED BY THE SOFTWARE ROAD EYE
Pag. 29
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
Reference curves for final acceptance
Materials Fatigue life and Moduli
Design of thichnesses and evaluation residual life
“ANY MATERIAL”
•Virgin materials •Marginal materials •Recycling •Etc. etc
“Measure of fatigue life of material”
Simplified fatigue life machine “ANAS”
EXAMPLE - definition of Performance Bearing Capacity by Is Structural Index
Lavorazione tipo RPA1 - Valori limiti ammissibili per Indice Strutturale e pressione applicata 1700kPa
40
50
60
70
80
90
100
110
5 7 9 11 13 15 17 19 21 23 25 27 29T aria °C
IS30
0
schiumato con 1 mese di maturazione
schiumato con 6 mesi di maturazione
schiumato con 1 anno di maturazione
zona non valida per le verificihe di accettabilità
della lavorazione
zona non valida per le verificihe di accettabilità della lavorazione
zona valida per le verificihe di accettabilità della lavorazione
Pag. 30
3. DESIGN OF MAINTENANCE
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
ANAS
STANDARD SPECIFICATION
ANAS in 2009 adopted a CONTRACT SPECIFICATIONS where the approval and the final payment is related to the test performed at the end of work with measurements made with high-speed non-destructive testing
THIS APPROACH enhances the self-control of the executing company during the execution of the work ONLY JOB WELL DONE WILL BE PAYED
….to PAY ONLY WORKS WELL DONE!
4. WORKS
5. PUNCTUAL CONTROL OF RESULTS OBTAINED WITH THE WORKS
Pag. 31
ANAS S.p.A. - Condirezione Generale Tecnica – Direzione Centrale Ricerca e Nuove Tecnologie
Centro Sperimentale Stradale
Pavement Evaluation 2014 September 15 -18, 2014 Blacksburg, VIRGINIA
ANAS MANAGEMENT WITH THE PERFORMANCE INDICATORS
ERMES FWD
FSD
Pag. 32
TSD
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