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### Simulating the hydration of cementitious phases with an oscillating rate of reaction

; and (1999) In Cement and Concrete Research 29(9). p.1513-1517
Abstract
To investigate how an oscillating reaction rate might influence the hydration of cementitious solids, a simple iterative mathematical model that includes recurrent passivation of the surface has been constructed. The algorithm generates a wide variety of hydration curves with a limited number of input parameters: i.e.. V0 (volume of unreacted solid after initial reaction), a, (degree of reaction upon initial wetting), x0 (fraction of particle surface passivated after initial wetting); running index: n (cycle number, with an arbitrary unit of time per cycle); constants: m (number of cycles with constant x, the relative rate of the hydration and passivation reactions), k (maximum linear rate of reaction front), and lambda (range 0-1,... (More)
To investigate how an oscillating reaction rate might influence the hydration of cementitious solids, a simple iterative mathematical model that includes recurrent passivation of the surface has been constructed. The algorithm generates a wide variety of hydration curves with a limited number of input parameters: i.e.. V0 (volume of unreacted solid after initial reaction), a, (degree of reaction upon initial wetting), x0 (fraction of particle surface passivated after initial wetting); running index: n (cycle number, with an arbitrary unit of time per cycle); constants: m (number of cycles with constant x, the relative rate of the hydration and passivation reactions), k (maximum linear rate of reaction front), and lambda (range 0-1, determines the general passivation behaviour, modelled by the algorithm x(new) = 4 lambda xold[1 - xold]). The hydration process is described by the sequence: (1) Delta V = k(1 - x)V^2/3, (2) Vnew = Vold - Delta V, (3) alpha = 1 - (V/V0) + alpha0. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Modeling, Hydration, Retardation, Kinetics
in
Cement and Concrete Research
volume
29
issue
9
pages
1513 - 1517
publisher
Elsevier
external identifiers
• scopus:0033189283
ISSN
0008-8846
DOI
10.1016/S0008-8846(99)00134-9
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Numerical Analysis (011015004), Polymer and Materials Chemistry (LTH) (011001041), Inorganic chemistry (ceased) (LUR000010)
id
bf538aef-a2e4-43c5-88ab-9ae366d41bc4 (old id 1224025)
date added to LUP
2016-04-01 15:33:16
date last changed
2020-01-12 18:34:13
```@article{bf538aef-a2e4-43c5-88ab-9ae366d41bc4,
abstract     = {To investigate how an oscillating reaction rate might influence the hydration of cementitious solids, a simple iterative mathematical model that includes recurrent passivation of the surface has been constructed. The algorithm generates a wide variety of hydration curves with a limited number of input parameters: i.e.. V0 (volume of unreacted solid after initial reaction), a, (degree of reaction upon initial wetting), x0 (fraction of particle surface passivated after initial wetting); running index: n (cycle number, with an arbitrary unit of time per cycle); constants: m (number of cycles with constant x, the relative rate of the hydration and passivation reactions), k (maximum linear rate of reaction front), and lambda (range 0-1, determines the general passivation behaviour, modelled by the algorithm x(new) = 4 lambda xold[1 - xold]). The hydration process is described by the sequence: (1) Delta V = k(1 - x)V^2/3, (2) Vnew = Vold - Delta V, (3) alpha = 1 - (V/V0) + alpha0.},
author       = {Evju, Cecilie and Hansen, Eskil and Hansen, Staffan},
issn         = {0008-8846},
language     = {eng},
number       = {9},
pages        = {1513--1517},
publisher    = {Elsevier},
series       = {Cement and Concrete Research},
title        = {Simulating the hydration of cementitious phases with an oscillating rate of reaction},
url          = {http://dx.doi.org/10.1016/S0008-8846(99)00134-9},
doi          = {10.1016/S0008-8846(99)00134-9},
volume       = {29},
year         = {1999},
}

```