Simulating the hydration of cementitious phases with an oscillating rate of reaction
(1999) In Cement and Concrete Research 29(9). p.15131517 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 01,... (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 01, 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:
http://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
 00088846
 DOI
 10.1016/S00088846(99)001349
 language
 English
 LU publication?
 yes
 id
 bf538aefa2e443c588ab9ae366d41bc4 (old id 1224025)
 date added to LUP
 20080904 16:52:24
 date last changed
 20170101 06:41:57
@article{bf538aefa2e443c588ab9ae366d41bc4, 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 01, 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 = {00088846}, keyword = {Modeling,Hydration,Retardation,Kinetics}, language = {eng}, number = {9}, pages = {15131517}, 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/S00088846(99)001349}, volume = {29}, year = {1999}, }