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A comparative study of ordinary and mineralised Portland cement clinker from two different production units Part I: Composition and hydration of the clinkers

Emanuelson, Anna LU ; Hansen, Staffan LU and Viggh, E (2003) In Cement and Concrete Research 33(10). p.1613-1621
Abstract
Portland cement clinkers from two production units were investigated; Plant 1: ordinary clinker (P1) and clinker mineralised with CaF2+CaSO4 (P1m); Plant 2: ordinary clinker (P2) and two clinkers mineralised with CaF2+CaSO4 (P2m, low SO3 and P2m', high SO3). The chemical composition of the clinkers was determined by X-ray fluorescence, ICP analysis, titration (free lime) and ion selective electrode measurements (F). Observed clinker parameters (LSF, SR, AR, R, wt.% MgO, F, SO3, free lime): P1 (0.96, 2.72, 1.27, 1.04, 0.78, 0.06, 0.64, 0.71); P1m (1.03, 2.21, 1.58, 2.18, 0.87, 0.23, 1.95, 0.69); P2 (1.00, 2.66, 1.72, 0.75, 4.06, 0.20, 1.38, 1.51); P2m (1.01, 2.91, 1.96, 0.90, 3.21, 0.39, 1.72, 2.06); P2m' (0.97, 2.70, 1.84, 1.15, 3.86,... (More)
Portland cement clinkers from two production units were investigated; Plant 1: ordinary clinker (P1) and clinker mineralised with CaF2+CaSO4 (P1m); Plant 2: ordinary clinker (P2) and two clinkers mineralised with CaF2+CaSO4 (P2m, low SO3 and P2m', high SO3). The chemical composition of the clinkers was determined by X-ray fluorescence, ICP analysis, titration (free lime) and ion selective electrode measurements (F). Observed clinker parameters (LSF, SR, AR, R, wt.% MgO, F, SO3, free lime): P1 (0.96, 2.72, 1.27, 1.04, 0.78, 0.06, 0.64, 0.71); P1m (1.03, 2.21, 1.58, 2.18, 0.87, 0.23, 1.95, 0.69); P2 (1.00, 2.66, 1.72, 0.75, 4.06, 0.20, 1.38, 1.51); P2m (1.01, 2.91, 1.96, 0.90, 3.21, 0.39, 1.72, 2.06); P2m' (0.97, 2.70, 1.84, 1.15, 3.86, 0.42, 2.48, 0.89). The qualitative and quantitative phase compositions were characterised using X-ray powder diffraction, backscattered electron imaging, X-ray microanalysis and elemental mapping, plus optical reflection microscopy. Phases observed in all clinkers were: alite, beta-belite, cubic aluminate, ferrite and free lime. Additional phases observed were: aphthitalite (P1, P2, P2m, P2m'), calcium langbeinite (P1m) and periclase (P2, P2m, P2m'). The clinker composition and texture differ more between the two plants, than between ordinary and mineralised clinker from the same production unit. Laboratory cements were prepared by mixing ground clinker with CaSO(4)(.)2H(2)O. The cements were hydrated in an isothermal calorimeter at 20 degreesC (water/cement weight ratio = 0.5) during 33 h. After 12 h, the laboratory cement based on P1m reached a higher level of reaction than the one based on P1. The P2m and P2m' laboratory cements had a slower reaction than the P2 cement. (C) 2003 Elsevier Ltd. All rights reserved. (Less)
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Contribution to journal
publication status
published
subject
keywords
Fluoride, Clinker, Hydration, Microstructure, Sulfate
in
Cement and Concrete Research
volume
33
issue
10
pages
1613 - 1621
publisher
Elsevier
external identifiers
  • wos:000220488900018
  • scopus:0042388239
ISSN
0008-8846
DOI
10.1016/S0008-8846(03)00115-7
language
English
LU publication?
yes
id
527d97ee-3938-4132-b694-f940aa4cbc1c (old id 140925)
date added to LUP
2007-07-13 11:26:55
date last changed
2018-01-07 08:56:43
@article{527d97ee-3938-4132-b694-f940aa4cbc1c,
  abstract     = {Portland cement clinkers from two production units were investigated; Plant 1: ordinary clinker (P1) and clinker mineralised with CaF2+CaSO4 (P1m); Plant 2: ordinary clinker (P2) and two clinkers mineralised with CaF2+CaSO4 (P2m, low SO3 and P2m', high SO3). The chemical composition of the clinkers was determined by X-ray fluorescence, ICP analysis, titration (free lime) and ion selective electrode measurements (F). Observed clinker parameters (LSF, SR, AR, R, wt.% MgO, F, SO3, free lime): P1 (0.96, 2.72, 1.27, 1.04, 0.78, 0.06, 0.64, 0.71); P1m (1.03, 2.21, 1.58, 2.18, 0.87, 0.23, 1.95, 0.69); P2 (1.00, 2.66, 1.72, 0.75, 4.06, 0.20, 1.38, 1.51); P2m (1.01, 2.91, 1.96, 0.90, 3.21, 0.39, 1.72, 2.06); P2m' (0.97, 2.70, 1.84, 1.15, 3.86, 0.42, 2.48, 0.89). The qualitative and quantitative phase compositions were characterised using X-ray powder diffraction, backscattered electron imaging, X-ray microanalysis and elemental mapping, plus optical reflection microscopy. Phases observed in all clinkers were: alite, beta-belite, cubic aluminate, ferrite and free lime. Additional phases observed were: aphthitalite (P1, P2, P2m, P2m'), calcium langbeinite (P1m) and periclase (P2, P2m, P2m'). The clinker composition and texture differ more between the two plants, than between ordinary and mineralised clinker from the same production unit. Laboratory cements were prepared by mixing ground clinker with CaSO(4)(.)2H(2)O. The cements were hydrated in an isothermal calorimeter at 20 degreesC (water/cement weight ratio = 0.5) during 33 h. After 12 h, the laboratory cement based on P1m reached a higher level of reaction than the one based on P1. The P2m and P2m' laboratory cements had a slower reaction than the P2 cement. (C) 2003 Elsevier Ltd. All rights reserved.},
  author       = {Emanuelson, Anna and Hansen, Staffan and Viggh, E},
  issn         = {0008-8846},
  keyword      = {Fluoride,Clinker,Hydration,Microstructure,Sulfate},
  language     = {eng},
  number       = {10},
  pages        = {1613--1621},
  publisher    = {Elsevier},
  series       = {Cement and Concrete Research},
  title        = {A comparative study of ordinary and mineralised Portland cement clinker from two different production units Part I: Composition and hydration of the clinkers},
  url          = {http://dx.doi.org/10.1016/S0008-8846(03)00115-7},
  volume       = {33},
  year         = {2003},
}