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Aging Management of Concrete
Structures in Nuclear Power Plants (MANAGE) .... on going
Project director: Erkki Vesikari, VTT
Principal researchers: Sistonen Esko <esko. Al-Neshawy Fahim, Tuomisto Mikko
Schedule: 2011 – 2014
Abstract:
The aim is to develope a monitoring and simulation system for the NPP concrete structures. Measurements of temperature and moisture content, chloride diffusion, corrosion, and other things essential for the management of degradation are performed. As a part of durability surveillance samples are taken from structures and analysed. The purpose of monitoring is to gather real time data for evaluation of the real condition of structures. Monitoring data are compared to the simulation results for calibrating the simulation of the future performance.
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The reliability of integrated moisture sensors in building applications .... on going
Project director: Laurila, Tomi
Principal researchers: Vuorinen, Vesa; Al-Neshawy, Fahim;
Mäkitalo, Mika
Research unit address:
Aalto University, School of Science and
Technology
Department of Electronics
PL 13340
FI-00076 Aalto
Department of Structural Engineering and Building Technology
PL 12100
FI-00076 Aalto
Confidentiality: no
Schedule: 2009-03-01 ... 2012-02-29
International research: no
Cooperation units outside TKK: VTT
Abstract:
The integrated wireless
moisture, temperature and chemical sensors provide effective means to
improve the quality of new and reparation building, enable monitoring of
the condition of the structures and to increase the energy efficiency of
buildings. Further, when combined with existing house automation technology
these sensors assist in implementation of health care technology
applications. However, to realize their full potential the sensors must
operate reliably, often for decades
Keywords: moisture sensor, reliability
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Effect of Interacted Deterioration Parameters on Service Life of Concrete Structures in Cold Environments .... on going
Project director: Puttonen, Jari
Principal researchers: Sistonen, Esko; Piironen, Jukka;
Al-Neshawy, Fahim; Kari, Olli-Pekka
Research unit address:
Aalto University, School of Science and
Technology
Department of Structural Engineering and Building Technology
PL 2100
FI-00076 Aalto
Confidentiality: no
Schedule: 2008-05-01 ... 2011-04-30
International research: yes
Cooperation units outside TKK: VTT
Abstract:
The novelty of this
research is to combine different damage models to one service-life
calculation model and apply this model in wide geographical area. The
objective of the project is to make service life calculation models
accounting for interaction when several types of deterioration are acting
simultaneously.
This research is a part of a
co-operation research between Finland, USA, Canada, Norway and Portugal.
Co-operation between TKK and VTT as well as foreign partners will
strengthen during the project.
Keywords: interaction, deterioration parameter, concrete
structure, service life
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The Use of ICT 3D Measuring Techniques for High Quality Construction
Project director: Puttonen, Jari
Principal researchers: Al-Neshawy, Fahim
Research unit address:
Aalto University, School of Science and
Technology
Structural Engineering and Building Physics
PL 2100
FI-00076 Aalto
Confidentiality: no
Schedule: 2005-09-01 ...
International research: no
Abstract:
The goal of the study is to
develop ICT-based tools to automatically retrieve dimensions of
factory-made elements and their surface quality as well as deformations
after installation and automatic comparison of these variables against 3D
CAD models and to monitor the construction site. The work consists of the
following tasks: 1. To develop methods for analytic and visual inspection
of deviations between planned and measured dimensions of component units.
2. To develope methods for verification of the skeletal structure of a
building and surface quality of the facade. 3. To identify measuring
devices and establish the tolerances for the new up-to-date component
technology and to study the propagation of precision through the whole
measurement process, considering both instrumental properties and
measurement geometry. 4. To improve the measuring process at the
construction site. 5. To study the potential of terrestrial laser scanner
in construction monitoring. 6. To develope image based methods to extract
geometric information from buildings and to create methods to produce image
data suitable for CAD-overlaying.
Keywords: high quality construction, 3D measuring tehnitues,
modelling
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Effect on Maintenance Measures on Service Life of Concrete Facades
Project director: Huovinen Seppo
Principal researchers: Sistonen, Esko; Piironen, Jukka;
Al-Neshawy, Fahim; Tukiainen, Pekka; Johansson, Niclas; Koskela, Harry
Research unit address:
Aalto University, School of Science and
Technology
Laboratory of Structural Engineering and Building Physics
PL 2100
FI-00076 Aalto
Confidentiality: no
Schedule: 2003-01-01 ... 2006-12-31
International research: no
Cooperation units outside TKK: VTT/ RTE; TTY/TRT
Abstract:
Deterioration of concrete
facades is a common phenomenon for Finnish buildings made in 1960's and
1970's. The financial value of the repair works of the facades is very
high, estimated cost in 10 years being 600 M€. The aesthetical and safety
reasons also are nation-ally important and emphasise the need to make the
best to increase the service life of the buildings. The knowledge
especially on the long term effects of the methods for increasing the
service life of the old facades is weak. The use of present empirical
repair methods often lead to recurrence of damage. The reasons for
deterioration have been studied mainly on a practical level and only
concerning some deterioration processes as the freeze-thaw resistance of
concrete. The scope of this project is to systematically analyse all
essential reasons of damage, such as material technical, structural and
building physical. The lack of basic knowledge on substantial corrosion
processes prior and after the maintenance and repair measures hasbeen a
drawback in facade rehabilitation. This scarcity of basic knowledge of
ageing processes causes unexpected expenses and even fatal errors when
deciding the methods and time of extending the service life of concrete
facades. The aims of the research are to: - analyse the ageing and
deterioration processes of old reinforced concrete facades - determine and
analyse the potential methods, with which the service life of the concrete
facades can be in-creased before fatal defects occur. - produce statistical
calculation methods and formulae, with which the service life of the old
facades can be es-timated prior and after maintenance measures.An economic
profitability study is included. - Introduce a national strategy for
rehabilitation measures of the reinforced concrete facades made in 1960's
and 1970's.
Keywords: Maintenance Measure, Service Life, Concrete Facade
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Self-compacting concrete
Project director: Penttala, Vesa
Principal researchers: Mannonen,Petri; Räsänen, Vesa;
Al-Neshawy, Fahim
Research unit address:
Aalto University, School of Science and
Technology
Laboratory of Building Materials Technology
PL 2100
FI-00076 Aalto
Confidentiality: no
Schedule: 2001-04-01 ... 2004-06-30
International research: no
Cooperation units outside TKK: VTT Rakennus- ja
yhdyskuntatekniikka
Abstract:
The research project is
focused on the production technology, mix design, and the mechanical and
workability properties of self-compacting concretes. The studied concretes
were produced using a cement amount of 200-420 kg/m3, a superplasticizer
dosage between 2 and 10 kg/m3, and the fly ash and carbonate filler amounts
were less than 200 kg/m3. The compressive strength values of the test
concretes ranged from 33.6 to 82.8 MPa. Air content of fresh concrete was
between 0.9 and 9 %. The effect of concrete temperature on the workability
and compressive strength properties of self-compacting concretes was
studied with concretes having 10, 20, and 30 oC temperatures after mixing.
The micro-structure, freeze-thaw durability, and the effects of pore size
distribution was studied. The pore size distribution was acquired by
mercury intrusion porosimetry. Usually self-compacting concretes possessed
a smaller meso-porosity volume compared to normal comparison concretes.
This is considered to follow from the smaller transition zone porosity
around the larger aggregate particles of the self-compacting concretes
which makes the binder matrix more homogeneous. The freeze-thaw durability
of the test concretes was assessed by the slab test in which 13 of the 14
test concretes achieved a 200 year design life-span in the environment
class XF1 and a 100 year design age in class XF3 of EN206 national Finnish
annex. Production tests were performed in four precast unit factories in
which local aggregates and different cements and admixtures were used.
Keywords: concrete, self-compacting
Research programme: Betonirakentamisen teknologiaohjelma
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Smart multifunctional structures
Project director: Penttala, Vesa
Principal researchers: Al-Neshawy, Fahim; Räsänen, Vesa
Research unit address:
Aalto University, School of Science and
Technology
Laboratory of Building Materials Technology
PL 2100
FI-00076 Aalto
Confidentiality: no
Schedule: 2000-11-01 ... 2002-08-31
International research: no
Cooperation units outside TKK: Tampereen teknillinen
korkeakoulu, Talonrakennustekniikan laboratorio
Keywords: smart structures, durability, concrete
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Freezing durability of concrete taking into consideration production management and testing methods
Project director: Penttala, Vesa
Principal researchers: Komonen, Juha; Räsänen, Vesa;
Al-Neshawy, Fahim; Eronen, Jussi; Tulimaa, Mika
Research unit address:
Aalto University, School of Science and
Technology
Laboratory of Building Materials Technology
PL 2100 (Rakentajanaukio 4)
FI-00076 Aalto
Confidentiality: no
Schedule: 1997-07-01 ... 2000-08-01
International research: no
Keywords: freezing durability, concrete, testing methods,
production, freezing dilations, freezing pressures
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