Simulating the hydration of cementitious phases with an oscillating rate of reaction
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1224025
- author
- Evju, Cecilie LU ; Hansen, Eskil LU and Hansen, Staffan LU
- organization
- publishing date
- 1999
- 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
- 2022-01-28 05:54:34
@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}},
keywords = {{Modeling; Hydration; Retardation; Kinetics}},
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}},
}