Advanced search
1 file | 431.15 KB

Isothermal and solution calorimetry to assess the effect of superplasticizers and mineral admixtures on cement hydration

P Siler, Jozef Kratky (UGent) and Nele De Belie (UGent)
Author
Organization
Abstract
The heat of hydration evolution of eight paste mixtures of various water to binder ratio and containing various pozzolanic (silica fume, fly ash) and latent hydraulic (granulated blast furnace slag) admixtures have been studied by means of isothermal calorimetry during the first 7 days of the hydration process and by means of solution calorimetry for up to 120 days. The results of early heat of hydration values obtained by both methods are comparable in case of the samples without mineral admixtures; the values obtained for samples containing fly ash and granulated blast furnace slag differ though. The results from isothermal calorimetry show an acceleration of the hydration process by the presence of the fine particles of silica fume and retarding action of other mineral admixtures and superplasticizer. The influence of the presence of mineral admixtures on higher heat development (expressed as joules per gram of cement in mixture) becomes apparent after 20 h in case of fly ash without superplasticizer and after 48 h for sample containing fly ash and superplasticizer. In case of samples containing slag and superplasticizer the delay observed was 40 h. The results obtained by solution calorimetry provide a good complement to the ones of isothermal calorimetry, as the solution calorimetry enables to study the contribution of the mineral admixtures to the hydration heat development at later ages of the hydration process, which is otherwise hard to obtain by different methods
Keywords
Isothermal calorimetry, Solution calorimetry, PASTES, STRENGTH, REACTIVITY, TEMPERATURE, CONCRETE, SILICA FUME, PORTLAND-CEMENT, NATURAL POZZOLANS, BLAST-FURNACE SLAG, DIFFERENT FLY ASHES, Superplasticizer, Mineral admixtures, Cement hydration

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 431.15 KB

Citation

Please use this url to cite or link to this publication:

Chicago
Siler, P, Jozef Kratky, and Nele De Belie. 2012. “Isothermal and Solution Calorimetry to Assess the Effect of Superplasticizers and Mineral Admixtures on Cement Hydration.” Journal of Thermal Analysis and Calorimetry 107 (1): 313–320.
APA
Siler, P., Kratky, J., & De Belie, N. (2012). Isothermal and solution calorimetry to assess the effect of superplasticizers and mineral admixtures on cement hydration. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 107(1), 313–320.
Vancouver
1.
Siler P, Kratky J, De Belie N. Isothermal and solution calorimetry to assess the effect of superplasticizers and mineral admixtures on cement hydration. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY. 2012;107(1):313–20.
MLA
Siler, P, Jozef Kratky, and Nele De Belie. “Isothermal and Solution Calorimetry to Assess the Effect of Superplasticizers and Mineral Admixtures on Cement Hydration.” JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 107.1 (2012): 313–320. Print.
@article{3047920,
  abstract     = {The heat of hydration evolution of eight paste mixtures of various water to binder ratio and containing various pozzolanic (silica fume, fly ash) and latent hydraulic (granulated blast furnace slag) admixtures have been studied by means of isothermal calorimetry during the first 7 days of the hydration process and by means of solution calorimetry for up to 120 days. The results of early heat of hydration values obtained by both methods are comparable in case of the samples without mineral admixtures; the values obtained for samples containing fly ash and granulated blast furnace slag differ though. The results from isothermal calorimetry show an acceleration of the hydration process by the presence of the fine particles of silica fume and retarding action of other mineral admixtures and superplasticizer. The influence of the presence of mineral admixtures on higher heat development (expressed as joules per gram of cement in mixture) becomes apparent after 20 h in case of fly ash without superplasticizer and after 48 h for sample containing fly ash and superplasticizer. In case of samples containing slag and superplasticizer the delay observed was 40 h. The results obtained by solution calorimetry provide a good complement to the ones of isothermal calorimetry, as the solution calorimetry enables to study the contribution of the mineral admixtures to the hydration heat development at later ages of the hydration process, which is otherwise hard to obtain by different methods},
  author       = {Siler, P and Kratky, Jozef and De Belie, Nele},
  issn         = {1388-6150},
  journal      = {JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY},
  keyword      = {Isothermal calorimetry,Solution calorimetry,PASTES,STRENGTH,REACTIVITY,TEMPERATURE,CONCRETE,SILICA FUME,PORTLAND-CEMENT,NATURAL POZZOLANS,BLAST-FURNACE SLAG,DIFFERENT FLY ASHES,Superplasticizer,Mineral admixtures,Cement hydration},
  language     = {eng},
  number       = {1},
  pages        = {313--320},
  title        = {Isothermal and solution calorimetry to assess the effect of superplasticizers and mineral admixtures on cement hydration},
  url          = {http://dx.doi.org/10.1007/s10973-011-1479-8},
  volume       = {107},
  year         = {2012},
}

Altmetric
View in Altmetric
Web of Science
Times cited: