IR-spectroscopic investigation of geopolymer and CSH-phase stability on heating temperature in post-fired building materials

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Authors

  • C. H. Rüscher
  • E. Rigo
  • K. Unterderweide
  • H. W. Krauss
  • F. Jirasit

Research Organisations

External Research Organisations

  • Technische Universität Braunschweig
  • Rajamangala University of Technology Lanna (RMUTL)
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Details

Original languageEnglish
Title of host publicationDevelopments in Strategic Ceramic Materials II
Subtitle of host publicationA Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
EditorsWaltraud M. Kriven, Yanchun Zhou, Jingyang Wang, Dongming Zhu, Gustavo Costa
PublisherAmerican Ceramic Society
Pages109-121
Number of pages13
Edition7
ISBN (electronic)9781119321811
ISBN (print)9781119321781
Publication statusPublished - 30 Jan 2017
EventDevelopments in Strategic Ceramic Materials II - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 - Daytona Beach, United States
Duration: 24 Jan 201629 Jan 2016

Publication series

NameCeramic Engineering and Science Proceedings
Number7
Volume37
ISSN (Print)0196-6219

Abstract

Hardened cement pastes were prepared using CEM I 52,5 N, CEM III/B 42,5 and CEM I 52,5 N with the addition of 50 wt% granulated blast furnace slag (H). IR spectra indicated the destruction of Si-O chains of the CSH-phase in 600°C heated with respect to unheated samples. Series of CEM I 42,5 N hardened cement pastes were heated in 100°C steps up to 800°C. IR spectra indicated a certain variation in the density of states (DOS) of asymmetric Si-O vibrations up to 300°C, followed by a linear decrease in the DOSPM (DOS peak maximum) up to 800°C. This effect is explained by the destruction of the Si-O chain units of the CSH phases. A direct relation of the DOSPM behavior with the stagnation of compressive strength up to 300°C, followed by a linear decrease up to 800°C was proved using mortars prepared based on CEM I 42,5 R with the addition of 20 wt% fly ash. For concrete samples a similar decrease in DOSPM was observed. Alkali activated metakaolin (AAMK) and granulated blast furnace slag (AAH), aged over 6 years show compressive strength of about 60 and 100 MPa for AAH and 35 for AAMK. Heating at 800°C revealed a loss of strength by about 50-80% for AAH but only 20% for MK. For AAH the loss in strength during thermal stress is related to similar effects in the IR spectra also described for breakdown of CSH-phases obtained for CEM-related samples. For AAMK weakening is related to crack formation along Si enriched zones.

ASJC Scopus subject areas

Cite this

IR-spectroscopic investigation of geopolymer and CSH-phase stability on heating temperature in post-fired building materials. / Rüscher, C. H.; Rigo, E.; Unterderweide, K. et al.
Developments in Strategic Ceramic Materials II : A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016. ed. / Waltraud M. Kriven; Yanchun Zhou; Jingyang Wang; Dongming Zhu; Gustavo Costa. 7. ed. American Ceramic Society, 2017. p. 109-121 (Ceramic Engineering and Science Proceedings; Vol. 37, No. 7).

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Rüscher, CH, Rigo, E, Unterderweide, K, Krauss, HW & Jirasit, F 2017, IR-spectroscopic investigation of geopolymer and CSH-phase stability on heating temperature in post-fired building materials. in WM Kriven, Y Zhou, J Wang, D Zhu & G Costa (eds), Developments in Strategic Ceramic Materials II : A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016. 7 edn, Ceramic Engineering and Science Proceedings, no. 7, vol. 37, American Ceramic Society, pp. 109-121, Developments in Strategic Ceramic Materials II - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016, Daytona Beach, United States, 24 Jan 2016. https://doi.org/10.1002/9781119321811.ch11
Rüscher, C. H., Rigo, E., Unterderweide, K., Krauss, H. W., & Jirasit, F. (2017). IR-spectroscopic investigation of geopolymer and CSH-phase stability on heating temperature in post-fired building materials. In W. M. Kriven, Y. Zhou, J. Wang, D. Zhu, & G. Costa (Eds.), Developments in Strategic Ceramic Materials II : A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 (7 ed., pp. 109-121). (Ceramic Engineering and Science Proceedings; Vol. 37, No. 7). American Ceramic Society. https://doi.org/10.1002/9781119321811.ch11
Rüscher CH, Rigo E, Unterderweide K, Krauss HW, Jirasit F. IR-spectroscopic investigation of geopolymer and CSH-phase stability on heating temperature in post-fired building materials. In Kriven WM, Zhou Y, Wang J, Zhu D, Costa G, editors, Developments in Strategic Ceramic Materials II : A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016. 7 ed. American Ceramic Society. 2017. p. 109-121. (Ceramic Engineering and Science Proceedings; 7). doi: 10.1002/9781119321811.ch11
Rüscher, C. H. ; Rigo, E. ; Unterderweide, K. et al. / IR-spectroscopic investigation of geopolymer and CSH-phase stability on heating temperature in post-fired building materials. Developments in Strategic Ceramic Materials II : A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016. editor / Waltraud M. Kriven ; Yanchun Zhou ; Jingyang Wang ; Dongming Zhu ; Gustavo Costa. 7. ed. American Ceramic Society, 2017. pp. 109-121 (Ceramic Engineering and Science Proceedings; 7).
Download
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abstract = "Hardened cement pastes were prepared using CEM I 52,5 N, CEM III/B 42,5 and CEM I 52,5 N with the addition of 50 wt% granulated blast furnace slag (H). IR spectra indicated the destruction of Si-O chains of the CSH-phase in 600°C heated with respect to unheated samples. Series of CEM I 42,5 N hardened cement pastes were heated in 100°C steps up to 800°C. IR spectra indicated a certain variation in the density of states (DOS) of asymmetric Si-O vibrations up to 300°C, followed by a linear decrease in the DOSPM (DOS peak maximum) up to 800°C. This effect is explained by the destruction of the Si-O chain units of the CSH phases. A direct relation of the DOSPM behavior with the stagnation of compressive strength up to 300°C, followed by a linear decrease up to 800°C was proved using mortars prepared based on CEM I 42,5 R with the addition of 20 wt% fly ash. For concrete samples a similar decrease in DOSPM was observed. Alkali activated metakaolin (AAMK) and granulated blast furnace slag (AAH), aged over 6 years show compressive strength of about 60 and 100 MPa for AAH and 35 for AAMK. Heating at 800°C revealed a loss of strength by about 50-80% for AAH but only 20% for MK. For AAH the loss in strength during thermal stress is related to similar effects in the IR spectra also described for breakdown of CSH-phases obtained for CEM-related samples. For AAMK weakening is related to crack formation along Si enriched zones.",
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Download

TY - GEN

T1 - IR-spectroscopic investigation of geopolymer and CSH-phase stability on heating temperature in post-fired building materials

AU - Rüscher, C. H.

AU - Rigo, E.

AU - Unterderweide, K.

AU - Krauss, H. W.

AU - Jirasit, F.

N1 - Funding information: Acknowledgments. This research work was done within the Josef Ressel-center for heuristic optimization “Heureka!” at the Upper Austria University of Applied Sciences, Campus Hagenberg and is supported by the Austrian Research Promotion Agency (FFG).

PY - 2017/1/30

Y1 - 2017/1/30

N2 - Hardened cement pastes were prepared using CEM I 52,5 N, CEM III/B 42,5 and CEM I 52,5 N with the addition of 50 wt% granulated blast furnace slag (H). IR spectra indicated the destruction of Si-O chains of the CSH-phase in 600°C heated with respect to unheated samples. Series of CEM I 42,5 N hardened cement pastes were heated in 100°C steps up to 800°C. IR spectra indicated a certain variation in the density of states (DOS) of asymmetric Si-O vibrations up to 300°C, followed by a linear decrease in the DOSPM (DOS peak maximum) up to 800°C. This effect is explained by the destruction of the Si-O chain units of the CSH phases. A direct relation of the DOSPM behavior with the stagnation of compressive strength up to 300°C, followed by a linear decrease up to 800°C was proved using mortars prepared based on CEM I 42,5 R with the addition of 20 wt% fly ash. For concrete samples a similar decrease in DOSPM was observed. Alkali activated metakaolin (AAMK) and granulated blast furnace slag (AAH), aged over 6 years show compressive strength of about 60 and 100 MPa for AAH and 35 for AAMK. Heating at 800°C revealed a loss of strength by about 50-80% for AAH but only 20% for MK. For AAH the loss in strength during thermal stress is related to similar effects in the IR spectra also described for breakdown of CSH-phases obtained for CEM-related samples. For AAMK weakening is related to crack formation along Si enriched zones.

AB - Hardened cement pastes were prepared using CEM I 52,5 N, CEM III/B 42,5 and CEM I 52,5 N with the addition of 50 wt% granulated blast furnace slag (H). IR spectra indicated the destruction of Si-O chains of the CSH-phase in 600°C heated with respect to unheated samples. Series of CEM I 42,5 N hardened cement pastes were heated in 100°C steps up to 800°C. IR spectra indicated a certain variation in the density of states (DOS) of asymmetric Si-O vibrations up to 300°C, followed by a linear decrease in the DOSPM (DOS peak maximum) up to 800°C. This effect is explained by the destruction of the Si-O chain units of the CSH phases. A direct relation of the DOSPM behavior with the stagnation of compressive strength up to 300°C, followed by a linear decrease up to 800°C was proved using mortars prepared based on CEM I 42,5 R with the addition of 20 wt% fly ash. For concrete samples a similar decrease in DOSPM was observed. Alkali activated metakaolin (AAMK) and granulated blast furnace slag (AAH), aged over 6 years show compressive strength of about 60 and 100 MPa for AAH and 35 for AAMK. Heating at 800°C revealed a loss of strength by about 50-80% for AAH but only 20% for MK. For AAH the loss in strength during thermal stress is related to similar effects in the IR spectra also described for breakdown of CSH-phases obtained for CEM-related samples. For AAMK weakening is related to crack formation along Si enriched zones.

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SN - 9781119321781

T3 - Ceramic Engineering and Science Proceedings

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BT - Developments in Strategic Ceramic Materials II

A2 - Kriven, Waltraud M.

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A2 - Zhu, Dongming

A2 - Costa, Gustavo

PB - American Ceramic Society

T2 - Developments in Strategic Ceramic Materials II - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016

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