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Completely recyclable concrete: how does the cement paste behave during reclinkering?

Mieke De Schepper UGent, Ruben Snellings UGent, Nele De Belie UGent, Klaartje De Buysser UGent and Isabel Van Driessche UGent (2012) Concrete repair, rehabilitation and retrofitting III. p.1353-1358
abstract
It is known that the concrete industry has a big impact on the environment: large amounts of natural resources are used for aggregate and cement production, the cement manufacturing process is energy intensive and is responsible for 5–8% of the global anthropogenic carbon dioxide emissions. Last but not least, the construction sector is an important producer of waste. For this reason the concept of Completely Recyclable Concrete (CRC) has been developed. After the demolition of a CRC construction, the material cycle is closed as the concrete rubble is given a second life as raw material for cement production, without need for ingredient adjustments. Therefore, the concrete mixture is designed to be chemically equivalent to the raw material for cement production. Of course, cement is an important ingredient within CRC and in this study, it is investigated how the hydrated cement paste behaves during reclinkering. Therefore, the reactions occurring during heating and reclinkering of a hydrated cement paste and of a CRC sample were investigated and compared. A hydrated cement paste and a hydrated CRC sample were ground in a planetary ball mill. Samples were fired at predefined temperatures up to 1450°C and quenched in order to study the clinker or pre-clinker phase assemblage. A series of X-ray diffraction (XRD) analyses were then performed on the obtained clinkers. Microscopic analyses were used to visualize the different clinker minerals with a water and nital etch.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
in
Concrete repair, rehabilitation and retrofitting III
editor
Mark G Alexander, Hans-Dieter Beushausen, Frank Dehn and Pilate Moyo
pages
1353 - 1358
publisher
CRC Press
place of publication
Leiden, The Netherlands
conference name
3rd International conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR)
conference location
Cape Town, South Africa
conference start
2012-09-03
conference end
2012-09-05
ISBN
9780415899529
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
VABB id
c:vabb:339715
VABB type
VABB-5
id
2984829
handle
http://hdl.handle.net/1854/LU-2984829
date created
2012-09-11 13:38:47
date last changed
2012-09-12 09:25:41
@inproceedings{2984829,
  abstract     = {It is known that the concrete industry has a big impact on the environment: large amounts of natural resources are used for aggregate and cement production, the cement manufacturing process is energy intensive and is responsible for 5--8\% of the global anthropogenic carbon dioxide emissions. Last but not least, the construction sector is an important producer of waste. For this reason the concept of Completely Recyclable Concrete (CRC) has been developed. After the demolition of a CRC construction, the material cycle is closed as the concrete rubble is given a second life as raw material for cement production, without need for ingredient adjustments. Therefore, the concrete mixture is designed to be chemically equivalent to the raw material for cement production. Of course, cement is an important ingredient within CRC and in this study, it is investigated how the hydrated cement paste behaves during reclinkering. Therefore, the reactions occurring during heating and reclinkering of a hydrated cement paste and of a CRC sample were investigated and compared.
A hydrated cement paste and a hydrated CRC sample were ground in a planetary ball mill. Samples were fired at predefined temperatures up to 1450{\textdegree}C and quenched in order to study the clinker or pre-clinker phase assemblage. A series of X-ray diffraction (XRD) analyses were then performed on the obtained clinkers. Microscopic analyses were used to visualize the different clinker minerals with a water and nital etch.},
  author       = {De Schepper, Mieke and Snellings, Ruben and De Belie, Nele and De Buysser, Klaartje and Van Driessche, Isabel},
  booktitle    = {Concrete repair, rehabilitation and retrofitting III},
  editor       = {Alexander, Mark G and Beushausen, Hans-Dieter and Dehn, Frank and Moyo, Pilate},
  isbn         = {9780415899529},
  language     = {eng},
  location     = {Cape Town, South Africa},
  pages        = {1353--1358},
  publisher    = {CRC Press},
  title        = {Completely recyclable concrete: how does the cement paste behave during reclinkering?},
  year         = {2012},
}

Chicago
De Schepper, Mieke, Ruben Snellings, Nele De Belie, Klaartje De Buysser, and Isabel Van Driessche. 2012. “Completely Recyclable Concrete: How Does the Cement Paste Behave During Reclinkering?” In Concrete Repair, Rehabilitation and Retrofitting III, ed. Mark G Alexander, Hans-Dieter Beushausen, Frank Dehn, and Pilate Moyo, 1353–1358. Leiden, The Netherlands: CRC Press.
APA
De Schepper, M., Snellings, R., De Belie, N., De Buysser, K., & Van Driessche, I. (2012). Completely recyclable concrete: how does the cement paste behave during reclinkering? In M. G. Alexander, H.-D. Beushausen, F. Dehn, & P. Moyo (Eds.), Concrete repair, rehabilitation and retrofitting III (pp. 1353–1358). Presented at the 3rd International conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR), Leiden, The Netherlands: CRC Press.
Vancouver
1.
De Schepper M, Snellings R, De Belie N, De Buysser K, Van Driessche I. Completely recyclable concrete: how does the cement paste behave during reclinkering? In: Alexander MG, Beushausen H-D, Dehn F, Moyo P, editors. Concrete repair, rehabilitation and retrofitting III. Leiden, The Netherlands: CRC Press; 2012. p. 1353–8.
MLA
De Schepper, Mieke, Ruben Snellings, Nele De Belie, et al. “Completely Recyclable Concrete: How Does the Cement Paste Behave During Reclinkering?” Concrete Repair, Rehabilitation and Retrofitting III. Ed. Mark G Alexander et al. Leiden, The Netherlands: CRC Press, 2012. 1353–1358. Print.