Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale

Alkali-silica reaction causes major problems in concrete structures due to the rapidity of its deformation. Factors that affect ASR include the alkali and silica content, relative humidity, temperature and porosity of the concrete, making the relationship a complex phenomenon to be understood. In in...

Full description

Saved in:
Bibliographic Details
Main Authors: Itam, Z., Beddu, S., Mohammad, D., Kamal, N.L.M., Razak, N.A., Hamid, Z.A.A.
Format: Conference Paper
Language:English
Published: 2020
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Universiti Tenaga Nasional
Language: English
id my.uniten.dspace-13203
record_format dspace
spelling my.uniten.dspace-132032020-07-03T08:07:45Z Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale Itam, Z. Beddu, S. Mohammad, D. Kamal, N.L.M. Razak, N.A. Hamid, Z.A.A. Alkali-silica reaction causes major problems in concrete structures due to the rapidity of its deformation. Factors that affect ASR include the alkali and silica content, relative humidity, temperature and porosity of the concrete, making the relationship a complex phenomenon to be understood. In investigating the mechanical deformation of the structure, the theory of continuum damage mechanics proves to be a suitable method. Damage mechanics can be used to predict the physical and chemical behavior of a structure, making it an appropriate method to study the behavior of the structure under the influence of alkali-silica reactivity. Therefore solution of the damage model is critically needed to overcome the concrete deformation problem. In this research, an engineering example of a thermo-chemo-hygro-mechanical model of a concrete gravity dam at the macroscale and coupled with the mesoscale will be studied for varying environmental conditions of temperature and relative humidity. The simulation was developed using the stochastic finite element software. Investigations found that temperature, as well as relative humidity influences the latency and characteristic time constants, which dictate the rapidity of ASR expansion into the structure, rendering heterogeneous values across the cross-section of the structure according to the relative humidity and temperature distribution. © 2019 Elsevier Ltd. All rights reserved. 2020-02-03T03:31:04Z 2020-02-03T03:31:04Z 2019 Conference Paper 10.1016/j.matpr.2019.06.355 en
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
language English
description Alkali-silica reaction causes major problems in concrete structures due to the rapidity of its deformation. Factors that affect ASR include the alkali and silica content, relative humidity, temperature and porosity of the concrete, making the relationship a complex phenomenon to be understood. In investigating the mechanical deformation of the structure, the theory of continuum damage mechanics proves to be a suitable method. Damage mechanics can be used to predict the physical and chemical behavior of a structure, making it an appropriate method to study the behavior of the structure under the influence of alkali-silica reactivity. Therefore solution of the damage model is critically needed to overcome the concrete deformation problem. In this research, an engineering example of a thermo-chemo-hygro-mechanical model of a concrete gravity dam at the macroscale and coupled with the mesoscale will be studied for varying environmental conditions of temperature and relative humidity. The simulation was developed using the stochastic finite element software. Investigations found that temperature, as well as relative humidity influences the latency and characteristic time constants, which dictate the rapidity of ASR expansion into the structure, rendering heterogeneous values across the cross-section of the structure according to the relative humidity and temperature distribution. © 2019 Elsevier Ltd. All rights reserved.
format Conference Paper
author Itam, Z.
Beddu, S.
Mohammad, D.
Kamal, N.L.M.
Razak, N.A.
Hamid, Z.A.A.
spellingShingle Itam, Z.
Beddu, S.
Mohammad, D.
Kamal, N.L.M.
Razak, N.A.
Hamid, Z.A.A.
Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale
author_facet Itam, Z.
Beddu, S.
Mohammad, D.
Kamal, N.L.M.
Razak, N.A.
Hamid, Z.A.A.
author_sort Itam, Z.
title Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale
title_short Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale
title_full Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale
title_fullStr Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale
title_full_unstemmed Simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale
title_sort simulation of alkali-silica reaction model in a concrete gravity dam at the macroscale and mesoscale
publishDate 2020
_version_ 1672614214829604864