Analysis Of Concrete Structures Deteriorated By Alkali

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Analysis of concrete structures deteriorated by alkali ...

Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study F. L. Costa1 • A. S. Torres2 • R. A. Neves3 Received: 30 June 2016/Accepted: 1 November 2016/Published online: 11 November 2016 Springer International Publishing Switzerland 2016 Abstract This research aims to analyze the alkali-aggre-gate reaction with the case study of a waterfront structure pier, a ...

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Analysis of concrete structures deteriorated by alkali ...

11/11/2016  Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study . F. L. Costa 1, A. S. Torres 2 R. A. Neves 3 Journal of Building Pathology and Rehabilitation volume 1, Article number: 13 (2016) Cite this article. 1831 Accesses. 1 Citations. Metrics details. Abstract. This research aims to analyze the alkali-aggregate reaction with the case study of a waterfront ...

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Analysis of concrete structures deteriorated by alkali ...

11/11/2016  Article Publisher preview available. Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study. November 2016;

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Analysis of concrete structures deteriorated by alkali ...

This research aims to analyze the alkali-aggregate reaction with the case study of a waterfront structure pier, a reinforced concrete structure located in a marine environment in Brazil. In the present work is done a literature review on the subject of alkali-aggregate reaction, focusing on Brazilian standards, addressing the chemical mechanism, risk analysis and prevention of this ...

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Analysis of concrete structures deteriorated by alkali ...

11/11/2016  Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study Costa, F.; Torres, A.; Neves, R. 2016-11-11 00:00:00 J Build Rehabil (2016) 1:13 DOI 10.1007/s41024-016-0016-3 RESEARCH ARTICLE Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study 1 2 3 • • F. L. Costa A. S. Torres R. A. Neves Received: 30 June 2016 /

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Analysis of concrete structures deteriorated by alkali ...

DOI: 10.1007/S41024-016-0016-3 Corpus ID: 113536886. Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study @article{Costa2016AnalysisOC, title={Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study}, author={F. L. Costa and A. S. Torres and R. A. Neves}, journal={Journal of Building Pathology and Rehabilitation}, year={2016 ...

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Analysis of concrete structures deteriorated by alkali ...

28/12/2018  RESEARCH ARTICLE Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study F. L. Costa1 • A. S. Torres2 • R. A. Neves3 Received: 30 June 2016

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Analysis of concrete structures deteriorated by alkali ...

DOI: 10.1007/S41024-016-0016-3 Corpus ID: 113536886. Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study @article{Costa2016AnalysisOC, title={Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study}, author={F. L. Costa and A. S. Torres and R. A. Neves}, journal={Journal of Building Pathology and Rehabilitation}, year={2016 ...

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Analysis of concrete structures deteriorated by alkali ...

This research aims to analyze the alkali-aggregate reaction with the case study of a waterfront structure pier, a reinforced concrete structure located in a marine environment in Brazil. In the present work is done a literature review on the subject of alkali-aggregate reaction, focusing on Brazilian standards, addressing the chemical mechanism, risk analysis and prevention of this ...

Get Price

Stress Analysis of Concrete Structures Subjected to Alkali ...

Many old concrete structures are known to suffer from alkali-aggregate reactions (AAR). This internal reaction causes gel formation inside the aggregate and the matrix and results in swelling of the concrete. This swelling in turn may cause secondary compressive stresses (if the structure is restrained, as most are), localized map cracks, and, ultimately structural cracks. In addition, the ...

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Concrete Deterioration by Alkali-Silica Reaction (ASR ...

12/11/2020  Under conditions of high alkali cement, reactive aggregates, and water presence, Alkali-Silica Reaction (ASR) can cause expansion and cracking within concrete. If left unmitigated, ASR can cause serious deterioration and damage to concrete structures over time. The best way to mitigate ASR is to avoid it altogether by using non-reactive aggregates.

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Research Article Research on Deterioration Mechanism of ...

Serious cracking and spalling appeared upon surface of the concrete structure soon a er the structure was put into service. Both alkali-aggregate reaction and freeze-thaw cycles may result in similar macro visible cracking and spalling. e possibility of alkali-aggregate reaction was excluded by both eld survey and lab examination such as chemical analysis, petrographic analysis, and ...

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A Case Study of Concrete Pavement Deterioration by Alkali ...

31/12/2007  The purpose of this study is to examine the deterioration caused by an alkali-silica reaction of concrete pavement in Korea. The investigation methods included visual inspection and Automatic Road Analyzer (ARAN) analysis of surface cracks, coring for internal cracks, stereo microscopic analysis, scanning electronic microscope (SEM) analysis, and electron dispersive X-ray

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Alkali Aggregate Reaction in Concrete - Types, Causes, and ...

Nonetheless, concrete deterioration caused by each type of alkali-aggregate reaction is similar. It should be known that no structure has ever collapsed due to alkali-aggregate reactions , but there are cases in which structural concrete members demolished due to the effect of alkali-aggregate reactions.

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Types and Causes of Concrete Deterioration

leading cause of deterioration in concrete. When steel corrodes, the resulting rust occupies a greater volume than the steel. This expan- sion creates tensile stresses in the concrete, which can eventually cause cracking, delamination, and spalling (Figs. 1 and 2). Steel corrodes because it is not a naturally occurring material. Rather, iron ore is smelted and refined to produce steel. The ...

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Petrographic Analysis of Concrete Deterioration - a PDH ...

Petrographic analysis is a key component of the investigation of an existing deteriorated concrete structure. Petrographic analysis can be used to determine chemical and physical irregularities in concrete including the nature of the chemical attack, identification of reactive aggregate, strength, mixture proportion estimates (such as water/cement ratio), cement and fly-ash content, corrosion ...

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Analysis of concrete structures deteriorated by alkali ...

28/12/2018  RESEARCH ARTICLE Analysis of concrete structures deteriorated by alkali-aggregate reaction: case study F. L. Costa1 • A. S. Torres2 • R. A. Neves3 Received: 30 June 2016

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Stress Analysis of Concrete Structures Subjected to Alkali ...

Many old concrete structures are known to suffer from alkali-aggregate reactions (AAR). This internal reaction causes gel formation inside the aggregate and the matrix and results in swelling of the concrete. This swelling in turn may cause secondary compressive stresses (if the structure is restrained, as most are), localized map cracks, and, ultimately structural cracks. In addition, the ...

Get Price

Concrete Deterioration by Alkali-Silica Reaction (ASR ...

12/11/2020  Under conditions of high alkali cement, reactive aggregates, and water presence, Alkali-Silica Reaction (ASR) can cause expansion and cracking within concrete. If left unmitigated, ASR can cause serious deterioration and damage to concrete structures over time. The best way to mitigate ASR is to avoid it altogether by using non-reactive aggregates.

Get Price

Concrete Deterioration - an overview ScienceDirect Topics

M.E. Williams, in Advanced Composites in Bridge Construction and Repair, 2014 9.3 Analysis of concrete deterioration in bridge substructures. The evaluation of structures undergoing premature concrete deterioration continues to be the object of research work seeking to incorporate long-term effects from deleterious reactions such as ASR. Finite element models of structural behavior, including ...

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A Case Study of Concrete Pavement Deterioration by Alkali ...

31/12/2007  The purpose of this study is to examine the deterioration caused by an alkali-silica reaction of concrete pavement in Korea. The investigation methods included visual inspection and Automatic Road Analyzer (ARAN) analysis of surface cracks, coring for internal cracks, stereo microscopic analysis, scanning electronic microscope (SEM) analysis, and electron dispersive X-ray

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EXPERIMENTAL AND ANALYTICAL ... - Home ICAAR Concrete

This report discusses the mechanical property values of the concrete core samples, analysis techniques and a comparison between the analysis and the experiment. Keywords: post-tensioned prestressed concrete beam, static loading test, analytical method, flexural behavior, mechanical properties of drilled cores 1 INTRODUCTION Deterioration by alkali-silica reaction (ASR) in civil infrastructures ...

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Alkali Aggregate Reaction in Concrete - Types, Causes, and ...

Nonetheless, concrete deterioration caused by each type of alkali-aggregate reaction is similar. It should be known that no structure has ever collapsed due to alkali-aggregate reactions , but there are cases in which structural concrete members demolished due to the effect of alkali-aggregate reactions.

Get Price

Effects of Concrete Deterioration on Safety of Dams

The purpose of this document is to identify how concrete deterioration affects the risk of a water resources structures. Concrete deterioration is a condition that affects the likelihood of failure by degrading the materials properties of a particular structure over time. The process of evaluating

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Petrographic Analysis of Concrete Deterioration - a PDH ...

Petrographic analysis is a key component of the investigation of an existing deteriorated concrete structure. Petrographic analysis can be used to determine chemical and physical irregularities in concrete including the nature of the chemical attack, identification of reactive aggregate, strength, mixture proportion estimates (such as water/cement ratio), cement and fly-ash content, corrosion ...

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Causes of Distress and Deterioration of Concrete

Given a detailed report of the condition of the concrete in a structure and a basic understanding of the various mech- anisms that can cause concrete deterioration, the problem becomes one of relating the observations or symptoms to the underlying causes. When many of the different causes of deterioration produce the same symptoms, the task of relating symptoms to causes is more difficult than ...

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