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estimation of concrete service life

estimation of concrete service life

ESTIMATION OF CONCRETE SERVICE LIFE

Estimation of concrete service life 3 Foreword Concrete is the most widely used building material. Despite of the significant advances made in concrete technology in recent years, the problems of unsatisfactory durability of structures are in a dramatic increase. Deterioration of concrete in service may be the result of a variety of mechanical, physical, chemical or biological processes ...

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Estimating the service-life of concrete structures ...

Estimating the service-life of concrete structures subjected to carbonation on the basis of the air permeability of the concrete cover Tiziano Teruzzi, University of Applied Sciences and Arts of Southern Switzerland, Switzerland (email: [email protected]) Abstract An effective lifetime management of buildings and civil infrastructures needs methods for verifying the compliance of their ...

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ESTIMATION OF RESIDUAL SERVICE LIFE OF CORRODING

workshop on the durability of concrete structures, described a number of definitions of service life as follows [12]. Technical Service Life: The time in service until a defined unacceptable state is reached. Functional Service Life: Time in service until the structure

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Estimation of service life-span of concrete structures ...

13/12/2015  Slide 1Estimation of service life-span of concrete structures Exercise 11 Slide 2 Strength classes in by50 Slide 3 Workability classes Slide 4 Slide 5 Concrete family -consept

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Service Life Estimation of Reinforced Concrete Structures ...

Service Life Estimation of Reinforced Concrete Structures Made Using Cr-bearing Rebars in Microcell Corrosion Environments Sung-Ho TAE,1) Je-Woon KYUNG,2) Takumi UJIRO3) and Sung-Woo SHIN4) 1) Sustainable Building Research Center, Hanyang University, Ansan 425-791 Korea. 2) BK21 Department of Architectural Environmental Engineering, Hanyang University, Seoul 133-791 Korea. E

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Service life estimation of concrete infrastructures ...

01/01/2018  This chapter deals with unprotected concrete structures and the estimation of their expected service life. Estimating the expected life of an item of infrastructure, or the expected safety over a defined lifetime, may be considered a problem in structural reliability.

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Estimating the service-life of concrete structures ...

Estimating the service-life of concrete structures subjected to carbonation on the basis of the air permeability of the concrete cover Tiziano Teruzzi, University of Applied Sciences and Arts of Southern Switzerland, Switzerland (email: [email protected]) Abstract An effective lifetime management of buildings and civil infrastructures needs methods for verifying the compliance of their ...

get price

ESTIMATION OF RESIDUAL SERVICE LIFE OF CORRODING CONCRETE

workshop on the durability of concrete structures, described a number of definitions of service life as follows [12]. Technical Service Life: The time in service until a defined unacceptable state is reached. Functional Service Life: Time in service until the structure

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Models for estimation of service life of concrete barriers ...

01/09/1990  @article{osti_6548946, title = {Models for estimation of service life of concrete barriers in low-level radioactive waste disposal}, author = {Walton, J C and Plansky, L E and Smith, R W}, abstractNote = {Concrete barriers will be used as intimate parts of systems for isolation of low level radioactive wastes subsequent to disposal. This work reviews mathematical models for estimating the ...

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Service life prediction of reinforced concrete structures ...

01/09/1999  This paper is focused on the estimation of durability and service life of reinforced concrete structures. Assuming that the chloride ion in concrete can be absorbed on tricalcium aluminate, calcium silicate hydrate, and by other constituents of hardened cement paste, hydrated or not, the exact analytical solution of the governing partial differential equation together with its boundary and ...

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Service life estimation of concrete bridge decks ...

The MOCT recently make it mandat ory that life cycle cost analysis (LCCA) for value engineering be used to all government, construction projects including private se ctor projects over 10billion won in terms of Korean currency., In the LCCA concept, it is important to estimate the end of service li fe of the bridge. Several models are available to predict the deterioration rates of bridge main ...

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Service life estimation of cracked and healed concrete in ...

Service life estimation of cracked and healed concrete in marine environment M. Maes N. De Belie Magnel Laboratory for Concrete Research, Ghent University, Belgium ABSTRACT: In the aggressive seawater environment, the durability of concrete is strongly influenced by the presence of chlorides and sulfates. Marine structures mostly have an important social function with a high economic impact ...

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Estimating Residual Service Life of Deteriorated ...

Evaluating present condition of reinforced concrete (RC) structures is necessary for planning future maintenance and estimating residual service life of structures. A ten point (0-9) condition rating system is proposed for obtaining present condition of RC structures based on the measured values of concrete cover, carbonation depth and chloride concentration at rebar depth through in-situ tests.

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Estimating Residual Service Life of Deteriorated ...

maintenance and estimating residual service life of structures. A ten point (0-9) condition rating system is proposed for obtaining present condition of RC structures based on the measuredvalues of concrete cover, carbonation depth and chloride concentration at rebar depth through insitu tests. Proposed condition rating has been related to - maintenance, inspection and replacement priorities ...

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SERVICE LIFE ESTIMATION IN THE DESIGN OF BUILDINGS A ...

3.4 Estimating service life – Consequences of failure 13 4 DEGRADATION, PERFORMANCE AND PERFORMANCE REQUIREMENTS .. 17 4.1 Durability and degradation 17 4.2 Performance and performance requirements - Service life 19 4.3 Dose-response functions 21 4.4 Service life data 22 4.5 Survey of houses in Reykjavik, Iceland 23 4.5.1 Windows of softwood 25 4.5.2 Wall surfaces of rendered concrete

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ESTIMATION OF CONCRETE SERVICE LIFE

Estimation of concrete service life 3 Foreword Concrete is the most widely used building material. Despite of the significant advances made in concrete technology in recent years, the problems of unsatisfactory durability of structures are in a dramatic increase. Deterioration of concrete in service may be the result of a variety of mechanical, physical, chemical or biological processes ...

get price

ESTIMATION OF RESIDUAL SERVICE LIFE OF CORRODING CONCRETE

workshop on the durability of concrete structures, described a number of definitions of service life as follows [12]. Technical Service Life: The time in service until a defined unacceptable state is reached. Functional Service Life: Time in service until the structure

get price

Estimation of the service life of concrete under different ...

A service life estimation system based on the deteriorated surface layer for 30–100 MPa concretes is briefly presented. Generally, the service life of concretes ranges from ten to one million years depending on the environment, strength and allowed deterioration of concrete. The analysis of archaeological and modern data, along with deterioration models, creates practical possibilities for ...

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SERVICE - LIFE ESTIMATION FOR CONCRETE STRUCTURES IN ...

Concrete structures in marine environment are damaged mainly by the effecting of chloride ions. So far, to estimate the service-life of marine structures is based on the determination of chloride ion penetration into concrete. The Whiting or modified Whiting method based on total electric charge passed (coulombs) is rapid, but only qualitative ...

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SERVICE - LIFE ESTIMATION FOR CONCRETE STRUCTURES IN ...

service - life estimation for concrete structures in marine environment ...

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Residual Life Assessment of Concrete Structures-A Review

serve as bench marks for estimating the residual service life. II. RESIDUAL SERVICE LIFE At many instances during the service period of structure, one may be interested to estimate the remaining or residual service life of concrete elements as well as for the structure as a whole. Fig.1 Indicative deterioration of structure with time. Residual service life assessment requires obtaining ...

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Predicting Service Life of Concrete Concrete Construction ...

19/08/2010  A: In the last few years, researchers have made great advances in creating models that can predict the service life of reinforced concrete in structures. These advances have led to the recently issued Version 2.0.1 of Life-365. Life-365 is software designed to estimate the service life and life-cycle costs of alternative concrete mix designs.

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Residual Service Life Estimation and its Importance for ...

Residual Service Life Estimation and its Importance for Pretensioned Concrete (PTC) Bridges in Coastal Cities. Leeds University, Leeds, UK. Many pre-tensioned concrete (PTC) bridges are experiencing premature chloride-induced corrosion. Hence, it is crucial to estimate their residual service life and update it with newer data on a periodic ...

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SERVICE LIFE OF CONCRETE IN A MARINE ENVIRONMENT

ESTIMATING SERVICE LIFE OF MARINE CONCRETE STRUCTURES A simple procedure for making an initial estimation of service life of marine concrete structures consists of the followings: • Determine the suitable chloride diffusion coefficient D based on short to medium-termed data of D by extrapolation on log-log scale to relevant time t; • Select suitable value of C S based on concrete grade (or ...

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CARBONATION SERVICE LIFE PREDICTION OF EXISTING CONCRETE ...

durability analysis and service life evaluation of concrete structures. Fagerlund [9] predicted the service life of structures using the relation between serviceability and time. This method can be used in carbonation, sulphate attack, and cement-aggregate reaction cases. Sjostrom [28] considered that the service life prediction for building and construction materials is a true example of ...

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