Insights in the chemical fundamentals of ASR and the role of calcium in the early stage based on a 3D reactive transport model

Xiujiao Qiu; Jiayi Chen; Guang Ye; Geert De Schutter

doi:10.1016/j.cemconres.2022.106778

Insights in the chemical fundamentals of ASR and the role of calcium in the early stage based on a 3D reactive transport model

Xiujiao Qiu, Jiayi Chen, Guang Ye, Geert De Schutter^*

^*Corresponding author for this work

Materials and Environment

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

23 Downloads (Pure)

Abstract

Prediction of alkali silica reaction is still difficult due to the lack of a comprehensive understanding of its chemical fundamentals. In-site experimentally revealing the fundamentals is not realistic as ASR shows over several years or even decades and is affected by many factors. In this paper, by utilizing a 3D reactive-transport simulation model at microscale, we have numerically explored the fundamentals of ASR in the early stage under the influence of reactive silica fraction, alkali concentration, silica disorder degree and aggregate porosity. Based on the simulation results, the chemical sequences of ASR, the initial location of ASR products, the mechanism behind and the role of calcium under the influence of the above factors are elaborated. Furthermore, a comprehensive mechanism to explain the pessimum reactive aggregate content is derived. The results of this paper give some insights about ASR in the early stage such as the initial expansion locations.

Original language	English
Article number	106778
Number of pages	19
Journal	Cement and Concrete Research
Volume	157
DOIs	https://doi.org/10.1016/j.cemconres.2022.106778
Publication status	Published - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

ASR chemical sequence
ASR products location
ASR simulation
Pessimum reactive silica content
Role of calcium

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10.1016/j.cemconres.2022.106778

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title = "Insights in the chemical fundamentals of ASR and the role of calcium in the early stage based on a 3D reactive transport model",

abstract = "Prediction of alkali silica reaction is still difficult due to the lack of a comprehensive understanding of its chemical fundamentals. In-site experimentally revealing the fundamentals is not realistic as ASR shows over several years or even decades and is affected by many factors. In this paper, by utilizing a 3D reactive-transport simulation model at microscale, we have numerically explored the fundamentals of ASR in the early stage under the influence of reactive silica fraction, alkali concentration, silica disorder degree and aggregate porosity. Based on the simulation results, the chemical sequences of ASR, the initial location of ASR products, the mechanism behind and the role of calcium under the influence of the above factors are elaborated. Furthermore, a comprehensive mechanism to explain the pessimum reactive aggregate content is derived. The results of this paper give some insights about ASR in the early stage such as the initial expansion locations.",

keywords = "ASR chemical sequence, ASR products location, ASR simulation, Pessimum reactive silica content, Role of calcium",

author = "Xiujiao Qiu and Jiayi Chen and Guang Ye and {De Schutter}, Geert",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

year = "2022",

doi = "10.1016/j.cemconres.2022.106778",

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AU - Qiu, Xiujiao

AU - Chen, Jiayi

AU - Ye, Guang

AU - De Schutter, Geert

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2022

Y1 - 2022

N2 - Prediction of alkali silica reaction is still difficult due to the lack of a comprehensive understanding of its chemical fundamentals. In-site experimentally revealing the fundamentals is not realistic as ASR shows over several years or even decades and is affected by many factors. In this paper, by utilizing a 3D reactive-transport simulation model at microscale, we have numerically explored the fundamentals of ASR in the early stage under the influence of reactive silica fraction, alkali concentration, silica disorder degree and aggregate porosity. Based on the simulation results, the chemical sequences of ASR, the initial location of ASR products, the mechanism behind and the role of calcium under the influence of the above factors are elaborated. Furthermore, a comprehensive mechanism to explain the pessimum reactive aggregate content is derived. The results of this paper give some insights about ASR in the early stage such as the initial expansion locations.

AB - Prediction of alkali silica reaction is still difficult due to the lack of a comprehensive understanding of its chemical fundamentals. In-site experimentally revealing the fundamentals is not realistic as ASR shows over several years or even decades and is affected by many factors. In this paper, by utilizing a 3D reactive-transport simulation model at microscale, we have numerically explored the fundamentals of ASR in the early stage under the influence of reactive silica fraction, alkali concentration, silica disorder degree and aggregate porosity. Based on the simulation results, the chemical sequences of ASR, the initial location of ASR products, the mechanism behind and the role of calcium under the influence of the above factors are elaborated. Furthermore, a comprehensive mechanism to explain the pessimum reactive aggregate content is derived. The results of this paper give some insights about ASR in the early stage such as the initial expansion locations.

KW - ASR chemical sequence

KW - ASR products location

KW - ASR simulation

KW - Pessimum reactive silica content

KW - Role of calcium

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DO - 10.1016/j.cemconres.2022.106778

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VL - 157

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Insights in the chemical fundamentals of ASR and the role of calcium in the early stage based on a 3D reactive transport model

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Keywords

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