Gautrans HVS Programme - HVSIA | Home...¾Structural Pavement Design methods. ... HVSIA...
Transcript of Gautrans HVS Programme - HVSIA | Home...¾Structural Pavement Design methods. ... HVSIA...
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS Programme
HVSIA 5th meeting16-18 July 2008
Gauteng Department of Public Transport, Roads and Works
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Overall trends in South AfricaIntensified migration to urban areas coupled with sustained economic growth of between 5 and 6%: necessitates greater investment in infrastructure to support SA’s socio-economic developmentLarge capital projects in support of economy and FIFA 2010 Significant capital investment in infrastructure provision (>6% of GDP), particularly in roads, electricity, housing, rail and ports
… but, acute lack of skilled resources
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Sectoral trends
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Investment in InfrastructureESKOM: $20 billion capital pipelineTRANSNET (Ports): $11 billionGAUTRAIN: $3 billion for deployment of a rapid rail networkSoccer Stadiums for FIFA World Cup and annex infrastructure: $2 billionSANRAL: $4 billion for Gauteng Highway Improvement ProjectHousing (low cost): $4 billionACSA: $2.5 billionDWAF (Water): $2.7 billion (4 dams, water transfer schemes), financed on the capital market
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Paved national and provincial roads, passenger vehicles,and commercial vehicles for transport of goods
0
100
200
300
400
500
1940 1950 1960 1970 1980 1990 2000
Inde
x (1
970
= 10
0)
Paved roads Passenger vehicles Goods vehicles
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
GFIP OBJECTIVE
“To provide a sustainable, safe and reliable strategic road network system in the Gauteng Province to optimize the movement of freight and passengers, focusing on the promotion
public transport, in order to grow the economy and enable development to the
benefit of all in the province.”
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
GFIP Project ExtentPLANNED LANE ADDITIONS: 180 km (2010) Phase 1
FUTURE UPGRADES:(223 KM)
PLANNED NEW ROUTES:158 km
FINAL SCHEME:561 KM
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Project financingGFIP Financing & Implementation
• User pay principlewill be used tofinance project
• Open RoadTolling
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
GFIP Proposed Road Improvements – Phase 1
In general, freeways will be upgraded to 4 lanes per direction - some sections, up to 6 lanes per directionInterchanges will be improvedAuxiliary lanes at on- and off rampsCross road improvementsMedian lighting is provided
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
GFIP N1 Allandale Interchange
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
GFIP N1 Lynnwood Interchange
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
GFIP Phase 1 Project Programme
Award of construction contracts: May 2008
Construction for 2010 phase commences (2,5 year construction period): May 2008
Construction substantially completed: May 2010
Construction completion date: October 2010
Commencement of toll operations: October 2010
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
D1 D2 C F A1-A2 B E1 E2Brakfontein to
N1/R21 I/CAtterbury to Proefplaas
Buccleuch to Brakfontein
Geldenhuis to Buccleuch
14th Avenue to Uncle Charlies
14th Avenue to Buccleuch
Old Barn to Geldenhuis
Reading to Elands I/C
Section 2200 Concrete 670.00 m3 195.00 m3 1930.00 m3 180.00 m3 312.00 m3 750.00 m3 336.00 m3 825.00 m3 5198.00 m3Prefabricated Culverts Reinforcing 15.50 t 13.00 t 35.00 t 25.00 t 8.90 t 10.00 t 22.40 t 9.20 t 139.00 tSection 2300 Concrete 2620.00 m3 2510.00 m3 280.00 m3 4495.00 m3 5785.00 m3 11740.00 m3 1540.00 m3 2125.00 m3 31095.00 m3Open Drains Reinforcing 48.40 t 37.00 t 2.50 t 61.60 t 13.50 t 134.00 t 53.00 t 41.50 t 391.50 tSection 4100 Prime Prime 160000.00 l 180000.00 l 424400.00 l 24360.00 l 241840.00 l 147000.00 l 77000.00 l 60000.00 l 1314600.00 l
Tack Coat 30% Stable Grade Emulsion
310000.00 l 93600.00 l 1150000.00 l 562342.00 l 424225.00 l 156000.00 l 840000.00 l 140000.00 l 3676167.00 l
Semi Gap 19mm max AR1 6640.00 t 6640.00 tBase 40/50 pen bit. With 26.5mm 159450.00 t 11986.00 t 17320.50 t 64045.00 t 35200.00 t 4221.67 t 292223.17 tContinuously Graded 30950.00 t 12130.00 t 26488.00 t 9239.00 t 1180.00 t 44000.00 t 89000.00 t 2875.00 t 215862.00 tSemi open grade bitumen rubber 12510.00 t 79000.00 t 16700.00 t 108210.00 tConcrete 20391.00 m3 9724.00 m3 32212.00 m3 12672.00 m3 5856.00 m3 26508.50 m3 15962.30 m3 16329.00 m3 139654.80 m3Reinforcing 2876.50 t 1359.00 t 3874.00 t 1579.10 t 1568.10 t 4514.20 t 1792.35 t 2814.60 t 20377.85 t
Section 7100 Concrete 5750.00 m3 3075.00 m3 29036.00 m3 16978.00 m3 7623.00 m3 30362.00 m3 1138.00 m3 93962.00 m3Concrete Pavement Reinforcing 400.00 t 270.00 t 1504.00 t 50055.00 t 22.10 t 550.00 t 254.00 t 53055.10 tBRASO 20831.00 t 116920.00 t 36020.00 t 173771.00 tUTFC 50000.00 m2 50000.00 m2
Structures
Section 4200 Asphalt
GAUTENG TOLL HIGHWAY PROJECTS Total
Total Concrete 269909.80 m3Total Reinforcing 73963.45 tTotal Prime 1314600.00 lTotal Tack Coat 3676167.00 lTotal Asphalt 796706.17 tTotal UTFC 50000.00 m2
Phase 1: Estimated Key Quantities
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Will SA be ready for FIFA 2010?
2010 Soccer Stadium … on track
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS Programme
Latest developments
E Sadzik resigned from Department in June-08Official reps of Dept: I Joubert & D Lourens
Contract has been renewed for period of 10 years (2008-2018)Value of contract: approx $14 million
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS ProgrammeStrategic Plan 2006 - 2009
Focus Areas:Sustainable Development and the EnvironmentLabour-Intensive ConstructionAsphalt PerformanceProvision of Low Volume Roads (including upgrading of unpaved roads)Vehicle Pavement Interaction (including dynamic loads and contact stresses)Concrete pavementsStructural Pavement Design methods
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS ProgrammeCurrent HVS programme projects:
Ultra-Thin highly-reinforced CRCP (sponsors: SANRAL & GDPTRW) –Concrete PavementsUltra-thin lightly-reinforced CRCP (sponsor: GDPTRW) – Concrete Pavements
Guidelines for bitumen stabilization with ETB & FB (sponsors: SABITA & GDPTRW) – Sustainable Development and the EnvironmentValidation of HMA design protocols for permanent deformation (Sponsor: GDPTRW & Sabita) – Asphalt PerformanceGuidelines for design and construction of LIC (Including documentation and training issues) – Labour Intensive ConstructionTechnology transfer and implementation of High-Modulus Asphalt (Sponsor: Sabita & GDPTRW) – Structural Design
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS programmeProject status:Guidelines for bitumen stabilization with ETB & FB
Inception report (Phase 1) finalized in January 2006Phase 2 structural and mix design virtually completedPhase 3, drafting of best practice guideline document for foamed-bitumen and bitumen-emulsion treated materials, will be completed by Aug-2008
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Hot Bitumen
TG(X)
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Knowledge Based Approach
Gather all available field performance dataDistil best elements of mechanistic analysisValidate and refine for robustnessDevelop clear, strong linkage to field testing and specifications
Data Sets:• More than 20 field sites with construction,
maintenance & performance info
• 7 HVS Sites (22 test sections) with construction & performance
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
The Design Process
LAB
DCPVisuals
Test Pits
FWD
Design InputsCapacity
Assessment
CBR 7-15%
200 mm BSM 1
130 mm C4
> 200 mm G6
Specifications
Mix Design
Materials Classification
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Materials Classification Report- Example
Test or Indicator Samples G4 G5 G6 G7
Test Limits for Material Class
G4 G5 G6 G7
Cumulative Certainty for Material Class
DCP Penetration 12 0.13 0.29 0.06 0.00
FWD Stiffness 67 0.26 0.32 0.11 0.00
Grading Analysis 3 0.37 0.34 0.11 0.00
% Passing 0.075 3 0.43 0.37 0.11 0.00
Plasticity Index 5 0.46 0.47 0.11 0.00
California Bearing Ratio 2 0.49 0.54 0.16 0.03
Relative Moisture Content 4 0.52 0.57 0.19 0.00
Outcome: Material is most likely a G5 design equivalent
Confidence: Confidence of the assessment is medium. For structural rehabilitation, it is recommended that the sample size and number of test indicators be increased.
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Suitability of PN-Based Method
Method not applicable to:• Design traffic > 30 msa• Design traffic < 1 msa (catalogue required)• Presence of thin, weak lenses• Subgrade CBR < 3 %
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Pavement Performance Information System (PPIS)
• Typical Performance Trends• Asphalt Base
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
www.ppis.roadrehab.com
• Representation of 50 Captured Sections
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Summary: Structural Design
Simplified method for determining structural capacityRobust, Easy to understandWell and explicitly validated with TRH4, LTPP and HVS datasetsValid for design traffic up to 20 mesa (majority of SA roads)Should not use independently for traffic > 30 mesaRequires Material Class as design inputs
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS programmeProject status:Validation of design protocols for HMA rutting
Laboratory studies completed on control mixAPT studies completed on control mix:
• Effects of temperature• Effects of layer thickness• Effects of contract stresses• Effects of channelised versus wandering
APT/lab studies in progress on first “rut-resistant mix”APT/lab studies on second “rut-resistant mix” to be initiated
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Main objectives of HMA rutting study
Compare permanent deformation results from APT with a range of laboratory tests with the aim to:• Identify appropriate tests for permanent
deformation prediction• Develop protocols & acceptance criteria for
selected testsAssess to what extent aggregate grading can be improved to prevent premature rutting, particularly at intersections
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Road R80
7-day average maximum temperature: 58 ºC Minimum surface temperature: -0.6 ºCTest conducted over 40ºC to 60ºC (70ºC) temperature range
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
APT site
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Basic properties of control mix: Marshall
Binder type: 60/70 pen grade (PG 64)Optimum binder content: 5%
Property Test Results Specifications% voids in mix 4.3% 3 to 6%% VMA 15% > 14%% VFB 72% 65 to 75%Filler-bitumen ratio 1.1 1.0 to 1.5Film thickness 8.2 μm > 7 μm
Dynamic creep modulus ~ 16.4 MPa 15-20 MPa
Marshall Stability ~11 kN 10 to 18 kNMarshall Flow ~3.0 mm 2 to 6 mmITS ~1 187 kPa > 800 kPaStatic creep ~242 MPa > 100 MPaGyratory voids (300N) ~2.4% >2.0%
HVS Tests on control mixTest
Number
Loading Conditions(Dual tyres)
Channelised/ wandering
Required Temperatur
e[°C]
Speed[km/h]
Single /
dual tyres
Uni- / bi-directional
Layer thickness
[mm]
Total Repetitions
441A4 1 x std case (40 kN, 620 kPa) Channelised 60°C Constant
10 km/hr Dual Uni 40 97 500
442A4 1 x std case (40 kN, 620 kPa) Channelised 40, 50, 60°C Constant
10 km/hr Dual Uni 40 368 370
443A4 1 x std case (40 kN, 620 kPa) Channelised 50, 55, 60°C Constant
10 km/hr Dual Uni 40 247 441
444A4 1 x std case (40 kN, 620 kPa) Channelised 50, 55, 60°C Constant
10 km/hr Dual Uni 25 289 886
445A4 1 x std case (40 kN, 620 kPa) Channelised 50, 55, 60°C Constant
10 km/hr Dual Uni 60 472 036
445A4A 1 x std case (40 kN, 620 kPa) Channelised 60°C Constant
10 km/hr Dual Uni 60 163 291
446A4 1 x n-shape (60 kN, 800 kPa) Channelised 60°C Constant
10 km/hr Dual Bi 40 80 300
447A4 1 x n-shape (60 kN, 800 kPa) Channelised 60°C Constant
10 km/hr Dual Uni 40 75 337
448A4 1 x m-shape (60 kN, 420 kPa) Channelised 60°C Constant
10 km/hr Dual Bi 40 212 171
449A4 1 x n-shape (60 kN, 800 kPa) Wandering 60°C Constant
10 km/hr Dual Bi 40 306 888
450A4 1 x m-shape (60 kN, 420 kPa) Wandering 60°C Constant
10 km/hr Dual Uni 40 303 000
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Effect of temperatureHamburg Rut Test (Field mix with different Temperatures) @ 40mm
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000
Wheel Passes
Rut
dep
th (m
m) A7c40-5 @40deg
A7c40-6 @40degA7c40-3 @50degA7c40-4 @50degA7c40-1 @60degA7c40-2 @60degA7c40-7 @55degA7c40-8 @55degA7c40-9 @45degA7c40-10 @45deg
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Creep slope vs. temperatureRelation between temperature and rut rate for standard mix under Hamburg test
y = 2E-05e0.1152x
R2 = 0.9254
0
0.005
0.01
0.015
0.02
0.025
35 40 45 50 55 60 65
Temperature ºC
Stea
dy s
tate
rut r
ate
mm
/pas
s
Hamburg results (40mm field cores)
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Permanent deformation under HVS (60ºC)
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
APT: effect of temperaturePermanent deformation HVS tests 441A (60ºC) and 442A (40ºC)
0
2
4
6
8
10
12
0 20 000 40 000 60 000 80 000 100 000 120 000 140 000 160 000 180 000 200 000
Wheel Passes
Perm
anen
t def
orm
atio
n [m
m]
Avg CS 60ºC
Avg TS 55ºC
Avg CS 40ºC
Avg TS 40ºC
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Density of test sections
2.300
2.350
2.400
2.450
2.500
2.550
2.600
0 10 20 30 40 50 60 70
Design thickness [mm]
BR
D
Density vs thickness Average4.3 % voids 7% voids
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Uni- versus bi-directional traffic
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
0 10000 20000 30000 40000 50000 60000 70000 80000 90000
Load repetitions
Perm
anen
t Def
orm
atio
n [m
m]
446A4 Avg CS (3-13) 446A4 Avg TS (3-13) 447A4 Avg CS (3-13) 447A4 Avg TS (3-13)
Bi-directional traffic
Uni-directional traffic
-10
-8
-6
-4
-2
0
2
4
6
8
10
900 1000 1100 1200 1300 1400 1500 1600 1700 1800
Cross Sectional Distance (mm)
Perm
anen
t Def
orm
atio
n (m
m)
446A4 447A4
Caravan side Traffic side
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Standard versus n- and M-shape contact stresses
INFLATION PRESSURE = 420 kPa
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 200
200
400
600
800
1000
1200
1400
1600
PIN NUMBER ACROSS VRSPTA
Tyre width: 220 mm
20kN 30kN 40kN 50kNWHEEL LOAD:
CO
NTA
CT
STR
ESS
(kPa
)
INFLATION PRESSURE = 420 kPa
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 200
200
400
600
800
1000
1200
1400
1600
PIN NUMBER ACROSS VRSPTA
Tyre width: 220 mm
20kN 30kN 40kN 50kNWHEEL LOAD:
CO
NTA
CT
STR
ESS
(kPa
)
1000
1200
1400
1600
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 200
200
400
600
800
720 kPa620 kPa520 kPa420 kPa
Tyre width: 220 mm
PIN NUMBER ACROSS VRSPTA
INFLATION PRESSURE::
Tyre Load = 18 kN
1000
1200
1400
1600
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 200
200
400
600
800
720 kPa620 kPa520 kPa420 kPa 720 kPa620 kPa520 kPa420 kPa
Tyre width: 220 mm
PIN NUMBER ACROSS VRSPTA
INFLATION PRESSURE::
Tyre Load = 18 kN
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Standard versus n- and M-shape contact stresses
0
1
2
3
4
5
6
7
8
9
0 50000 100000 150000 200000 250000
Load repetitions
Perm
anem
t def
orm
atio
n [m
m]
446A4 Avg CS 446A4 Avg TS 447A4 Avg CS 447A4 Avg TS 448A4 Avg CS 448A4 Avg TS445A4A Avg CS 445A4A Avg TS
Standard load uni
M-shape load bi
N-shape load bi
N-shape load uni
-8
-6
-4
-2
0
2
4
6
8
900 1000 1100 1200 1300 1400 1500 1600 1700 1800
Cross Sectional Distance (mm)
Perm
anen
t Def
orm
atio
n (m
m)
446A4 447A4 448A4 445A4A
Standard load
n-shape load
m-shape load
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Assessment of “rut-resistant mixes”
Bailey method:
Fine-graded mixes: <90% of loose unit weightCoarse-graded mixes: 95-105% of loose unit weightStone-mastic asphalt: >100% of rodded unit weight
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Aggregate packing
Mix Bailey CA CUW DASR porosity
Reference 74 % (fine) 52 % (fine)
East Rand 99 % (coarse) 48.3 % (coarse)
West Rand 105 % (coarse) 46.9 % (coarse)
CA CUW: Coarse Aggregate Chosen Unit WeightDASR: Dominant Aggregate Size Range
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gradings
0
10
20
30
40
50
60
70
80
90
100
0
Sieve size (raised to power 0.45)
perc
enta
ge p
assi
ng
Reference mix Rut challenge E-Rand Rut challenge W-Rand
PCS
(2.3
6 m
m).
SCS
(0.6
0 m
m).
TCS
(0.1
5 m
m).
Hal
f sie
ve (4
.75
mm
). 0.075 0.300 1.18 2.36 4.75 6.7 9.5 13.2 0.015 0.600
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Comparison (channelised)60C vs 70C Rut resistant summary
0.0
0.5
1.0
1.5
2.0
2.5
0 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000
Repetitions
Ave
rage
tota
l sur
face
rut [
mm
]
451A4 TOTAL AVG CS 451A4 AVG TS 452A4 TOTAL AVG CS 452A4 AVG TS
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Comparison (channelised)Comparison between STD and RR1 HMA mixes - Temperature
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
0 20000 40000 60000 80000 100000 120000
Repetitions
Tota
l sur
face
rut [
mm
]
441A4 TOTAL CS 441A4 TOTAL TS 451A4 TOTAL CS 451A4 TOTAL TS 452A4 TOTAL CS 452A4 TOTAL TS
60C and 70C
58.5C
60.9C
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Comparison (wandering)Comparison between STD and RR1 HMA mixes - WANDER
0.0
5.0
10.0
15.0
20.0
25.0
0 50000 100000 150000 200000 250000 300000 350000
Repetitions (wandering, bi-directional)
Perm
anen
t sur
face
def
orm
atio
n (to
tal)
[mm
]
449A4 TOTAL 453A4 TOTAL
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS programmeProject status:High-Modulus Asphalt (HiMA)
• Technology transfer & implementation of HiMA in South Africa
• Four phases of which Phase 1 is essentially completed
0
20
40
60
80
100
120
140
1970 1980 1990 2000
Gra
de [1
/10
mm
]M
odul
us [1
00 M
Pa]
0
1
2
3
4
5
6
Bin
der c
onte
nt [p
pc]
GradeModulusBinder content
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Mechanical characteristics of HiMA
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Phase 1: Preliminary assessment of viability
Overseas study tour to Colas, Total, Shell and TRL(June 2008)
Preliminary viability assessment(July 2008)
SAT Seminars(August/September 2008)
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Phase 2:Preliminary guidelines on design
Task 1: Finalisation of mix design & benchmarking (Aug-Dec 2008)
• Finalise French mix design• Evaluate performance attributes based on French testing
protocols• Parallel testing in South Africa using SA testing protocols• Compare/correlate results• Draft provisional guidelines on mix design
Task 2: Structural design and cost comparisons(Jul-Oct 2008)
• Evaluation of a series of pavement structures (new construction & rehabilitation), with and without HiMA
• Use results to compare initial and life-cycle costs• Draft provisional guidelines on structural design
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Phase 2:Preliminary guidelines on design
Task 3: Experimental Plan for Phase 3(Nov-Dec 2008)
• Drafting of plan for construction of demonstration sections in Gauteng and KwaZulu-Natal
• Drafting of plan for APT programme
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Phase 3:Demo sections & validation through APT
Objectives:• Hone in on manufacturing & construction and capture
best practice• Compare response & performance of HiMA vis-à-vis
conventional pavements• Establish base line data for LTPP
Expected duration:• January to September 2009
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Phase 4:Guidelines, specifications & T’T
Objectives:• Develop Sabita/AsAc guidelines on the Design
and Use of High-Modulus Asphalt Mixes”• Develop South African specifications• Provide feedback at RPFs• Publish papers at SATC• Articles in Digest & trade press• Integrate HiMA in Asphalt Academy courses• Asphalt Academy national seminars
Expected duration:• October 2009 to March 2010
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS ProgrammeHVS future projects:
HMA performance• Testing of rut resistant mixes including Hi-Modulus
Asphalt (HiMA)• Fatigue and durability evaluation of HMA• Updating of design guidelines
South African Pavement Design Method• Model development• Validation & calibration
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
SA Pavement Design MethodPhase 1 – Develop Detailed Project Briefs – Nov-2006 Phase 2a - Inception Phase (22 Projects) – Jul-2007
Investigate available solutionsFinalize project methodologyFinalize cost and resource allocation
Inception Report Peer Review – Nov-2007Phase 2b – Completion of Inception Phase:
Finalise the end product framework and inter-dependencies;Adjustments to the current project plan based on:
Inclusion of functional performance simulation (roughness, texture, friction, etc) – Close gap between PMS and DesignInclusion economic analysis of design alternatives and maintenance strategies
Phase 3: Project Delivery (July 2008 ?)
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Technology transferMarketing brochureSATC papers – July 2008Other conference papersSAT SeminarsRPF feedbackCoursesReports / Executive Summaries Website
HVSIA meeting.16-18 July 2008 Gautrans HVS Programme
Gautrans HVS reports available onwww. gautrans-hvs.co.za