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Cluster “LIFETIME”
Cluster “LIFETIME” consists of five EU Growth programme projects, with objective to integrate the
knowledge of partners of these projects for advancing the work and results of all projects, and to produce an
integrated and generic “European Guide for Lifetime Design and Management of Civil Infrastructures and
Buildings”
Project: C O N L I F E
Coordinator:
Universität Essen, IBPM, Germany. Prof. Dr. Max J. Setzer, [email protected]
Life-time prediction of high-performance concrete with respect to durability
Variation of additives +
admixtures, cement, air
(B) Production
Mixing order, SP dosage,etc.
(C) Fresh concrete
properties
Rheology, workability, etc.
(D) Hardened concrete
properties
Lab testing
by appropriate test methods
Strength, pore size distr.,etc.
• Understanding and avoidance of damages of
Durability
HPC due to practical conditions
• Know-how about optimal composition of HPC mix designs with regard
to rheological aspects and damage protection
• Adjustment of existing test methods to the behaviour of HPC
• Estimation of a service-life of HPC constructions under various climates
• Achievement of a fundamental database and an unified European level
Accelerated lab testing
simulation of attack type standardized
by test methods, testing of 66 mixes
Freeze-thaw
Frost-salt
Cyclic
temperature
Field testing
of 22 mixes per region at totally 9 test
stations all over Europe, covering
different climatic conditions
Acid
Seawater
Input of data into database
Work program: Investigation of all relevant HPC
properties with identification of
damage mechanisms, servicelife estimation and final definition
of
hints
(Fig.1)
Results:
(A) Mix design/
composition
Analysis of in-service structures
Fire
Description of deterioration process and
definition of recommendations for application
Major Objective: Development of deterioration models and life-time design concepts for high-performance concrete
(HPC) under different environmental conditions and exposure classes
app. 60 existing structures with
differences of climate, application type
and mix design
Shrinkage
Fig.1: Summary of work program
Main output: Manual with recommendations and hints regarding HPC application and service-life estimation, including
acceptance criteria and production rules(2) (Fig.2)
Shrinkage [mm/m]
Applied test procedure
Implementation of test procedure
Amendments of test method for HPC
e.g. shrinkage
Lab performance
0.3
← Effect of w/b ratio on drying and
autogenous shrinkage, for HPC and OPC
(w/b=0.50).
OPC
Drying
Autogenous
0.2
Exposed aggregate from severe scaling of
surface paste layer ↓
0.1
0.0
0.30
0.35
0.42
water/binder ratio
0.50
Field performance
0,125
mm
e.g. frost-salt
Review of in-service structure
1st Winter
2nd Winter
100
e.g. frost
General assessment and recommendations for mix designs
Exposure classes (EN206)

f
p

t  xc 
 K x,env

 a 

 
 D6m 
1
b




RDM [%]
Service-life evaluation
e.g.
seawater
80
2
critical
60
field
resistance
40
Prediction of corrosion initiation period
laboratory
resistance
20
where: t: period of corrosion initiation in year,
xc: cover thickness in mm,
a, b: regression constants, a = 0.212 and b = 1.53,
D6m: the diffusivity measured at 6 months age by the CTH method
fp: factor describing effect of pozzolanic additives on chloride threshold
Kx,env: environmental factor.
0
20
40
60
80
100
Lab test duration [ftc]
↑ Comparison of laboratory and field exposure in
Finnish -40C environment, for an HPC mixture with
a w/b=0.42, 7% silica fume and non-air entrained
Fig.2: Overview of manual structure, divided into the above sub-chapters for each of the investigated exposure type - example of results(1),(2),(3)
Publications: (1) M.J. Setzer, S. Palecki: Proceedings of international conference on durability of HPC and final workshop of CONLIFE, 23-24 September 2004, Essen, Germany, ISBN 3 931 681 807
(2) CONLIFE Manual with recommendations for application of HPC & database as CD-rom, published and distributed by MC Bauchemie, September 2004
(3) CONLIFE web page: http:/fasae.ibpmw.uni-essen.de/euproject , deliverable reports 1-10
Cluster “LIFETIME” coordinating organisations:
Cluster “LIFETIME” projects:
• VTT Technical Research Centre of Finland, FI
(coordinator of the cluster: Prof. Dr. Asko Sarja,
[email protected])
• Taylor Woodrow Construction Ltd, UK
• CSTB Centre Scientifique et Technique du Bâtiment, FR
• Imperial College of Science, Technology and Medicine, UK
• Universität Essen, DE
• LIFECON (Coordinator VTT, Finland)
• EUROLIFEFORM (Coordinator Taylor Woodrow, United
Kingdom)
• INVESTIMMO (Coordinator CSTB, France)
• LICYMIN (Coordinator ICSTM, United Kingdom)
• CONLIFE (Coordinator Universität Essen, Germany)