Cluster “LIFETIME” Cluster “LIFETIME” projects: LIFECON (Coordinator VTT, Finland) EUROLIFEFORM (Coordinator Taylor Woodrow, United Kingdom) INVESTIMMO (Coordinator CSTB, France) LICYMIN (Coordinator ICSTM, United Kingdom) CONLIFE (Coordinator Universität Essen, Germany) 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, Cluster “LIFETIME” coordinating organisations: VTT Technical Research Centre of Finland, FI (coordinator of the cluster: Prof. Dr. Asko Sarja, Taylor Woodrow Construction Ltd, UK CSTB Centre Scientifique et Technique du Bâtiment, FR Imperial College of Science, Technology and Medicine, UK Universität Essen, DE Life-time prediction of high-performance concrete with respect to durability Major Objective: Development of deterioration models and life-time design concepts for high-performance concrete (HPC) under different environmental conditions and exposure classes Publications: (1) M.J. Setzer, S. Palecki: Proceedings of international conference on durability of HPC and final workshop of CONLIFE, September 2004, Essen, Germany, ISBN (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: deliverable reports 1-10 Freeze-thaw Frost-salt Cyclic temperature Acid Seawater Shrinkage Fire (A) Mix design/ composition (B) Production (C) Fresh concrete properties (D) Hardened concrete properties Rheology, workability, etc. Strength, pore size distr.,etc. Durability Description of deterioration process and definition of recommendations for application Applied test procedure Performance of HPC under different exposure conditions (D) Exposure classes (EN206) Implementation of test procedure Amendments of test method for HPC Lab performance Field performance Review of in-service structure General assessment and recommendations for mix designs Service-life evaluation ↑ 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 e.g. shrinkage ← Effect of w/b ratio on drying and autogenous shrinkage, for HPC and OPC (w/b=0.50). e.g. seawater e.g. frost-salt Exposed aggregate from severe scaling of surface paste layer ↓ Main output: Manual with recommendations and hints regarding HPC application and service-life estimation, including acceptance criteria and production rules (2) (Fig.2) Accelerated lab testing simulation of attack type standardized by test methods, testing of 66 mixes Field testing of 22 mixes per region at totally 9 test stations all over Europe, covering different climatic conditions Analysis of in-service structures app. 60 existing structures with differences of climate, application type and mix design Work program: Results: Understanding and avoidance of damages of 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 Investigation of all relevant HPC properties with identification of damage mechanisms, service- life estimation and final definition of hints (Fig.1) e.g. frost 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) Fig.1: Summary of work program t: period of corrosion initiation in year, x c : cover thickness in mm, a, b: regression constants, a = and b = 1.53, D 6m : the diffusivity measured at 6 months age by the CTH method f p : factor describing effect of pozzolanic additives on chloride threshold K x,env : environmental factor. Prediction of corrosion initiation period where: Variation of additives + admixtures, cement, air Mixing order, SP dosage,etc. Lab testing by appropriate test methods Mix design and production rules (A), (B) Properties of HPC (C), (D) Input of data into database