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Wpływ opóźniaczy węglowodanowych na ograniczenie złego wpływu minerałów ilastych na właściwości dyspergujące superplastyfikatorów polikarboksylanowych

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Wybrane pełne teksty z tego czasopisma
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Warianty tytułu
EN
Effect of carbohydrate retarders on clay tolerance of the polycarboxylate superplasticizer
Języki publikacji
PL EN
Abstrakty
PL
W pracy zbadano wpływ węglowodanów sacharozy oraz maltodekstryny na skuteczność działania domieszek polikarboksylanowych w zaczynach zawierających montmorillonit. W tym celu oznaczano konsystencję zaczynów oraz oceniono stopień adsorpcji PCE oraz węglowodanów w zawiesinie montmorillonitu na podstawie całkowitej zawartości węgla organicznego. Oba węglowodany zmniejszały dodatek PCE potrzebny do uzyskania założonej płynności zaczynów o kilkanaście procent i ograniczały zmniejszanie się konsystencji w czasie. Zarówno sacharoza jak i maltodekstryna nie wbudowują się pomiędzy warstwy montmorillonitu, ale w niewielkim stopniu ograniczają interkalację PCE, najprawdopodobniej dzięki wiązaniom wodorowym cząsteczek węglowodanów z bocznymi łańcuchami poli(tlenku etylenu).
EN
The effect of two carbohydrate retarders i.e. sugar and maltodextrin on the clay tolerance of PCE was investigated in this study. The fluidity loss of cement-montmorillonite paste was tested to assess the clay tolerance of PCE. Adsorption of PCE and carbohydrate in montmorillonite suspension was assessed with Total Organic Carbon measurements. On the basis of several methods application the interaction of carbohydrates with montmorillonite was discussed. Carbohydrates addition is reducing the addition of PCE needed to reach the same initial fluidity level of cement paste. Also the consistency loss is decreased by addition of carbohydrates. The results showed that nor sugar neither maltodextrin can be intercalated between montmorillonite layers. However, they have a slight effect on hindering the intercalation of PCE, most probably, due to the hydrogen bonds between carbohydrate and long side chain of PEO.
Czasopismo
Rocznik
Strony
16--29
Opis fizyczny
Bibliogr. 22 poz., il., tab.
Twórcy
autor
  • State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China
autor
  • State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China
autor
  • State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China
autor
  • State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China
Bibliografia
  • 1. J. Plank, E. Sakai, C. W. Miao. “Chemical admixtures — Chemistry, applications and their impact on concrete microstructure and durability”. Cement and Concrete Research, 78, 81-99 (2015).
  • 2. E. Sakai, D. Atarashi, M. Daimon. “Interaction between superplasticizers and clay minerals”. Proceedings of the 6th International Symposium on Cement & Concrete and CANMET/ACI International Symposium on Concrete Technology for Sustainable Development, Vols 1 and 2, 1560-1566 (2006).
  • 3. H. Tan, C. Qi, B. Ma. “Effect of polycarboxylate superplasticiser adsorption on fluidity of cement-clay system”. Materials Research Innovations, 19, 423-428 (2015).
  • 4. N. A . Tregger, M. E. Pakula, S. P. Shah. “Influence of clays on the rheology of cement pastes”. Cement and Concrete Research, 40, 384-391 (2010).
  • 5. V. A . Fernandes, P. Purnell, G. T. Still. “The effect of clay content in sands used for cementitious materials in developing countries”. Cement and Concrete Research, 37, 751-758 (2007).
  • 6. J. K . Norvell, J. G. Stewart, M. C. Juenger. “Influence of clays and clay-sized particles on concrete performance”. Journal of materials in civil engineering, 19, 1053-1059 (2007).
  • 7. L. Lei and J. Plank. “A concept for a polycarboxylate superplasticizer possessing enhanced clay tolerance”. Cement and Concrete Research, 42, 1299-1306 (2012).
  • 8. D. Atarashi, K. Yamada, A. Itoh. “Interaction between Montmorillonite and Chemical Admixture”. Journal of Advanced Concrete Technology, 13, 325-331 (2015).
  • 9. H. Tan, B. Gu, B. Ma. “Mechanism of intercalation of polycarboxylate superplasticizer into montmorillonite”. Applied Clay Science, 129, 40-46 (2016).
  • 10. R. Ait-Akbour, P. Boustingorry, F. Leroux. “Adsorption of PolyCarboxylate Poly(ethylene glycol) (PCP) esters on Montmorillonite (Mmt): Effect of exchangeable cations (Na+, Mg2+ and Ca2+) and PCP molecular structure”. Journal of Colloid and Interface Science, 437, 227-234 (2015).
  • 11. H. Tan, Y. Guo, B. Ma. “Effect of sodium gluconate on clay tolerance of polycarboxylate superplasticiser”. Advances in Cement Research, 29, 278-286 (2017).
  • 12. M. L . Nehdi. “Clay in cement-based materials: Critical overview of state-of-the-art”. Construction and Building Materials, 51, 372-382 (2014).
  • 13. S. Ng and J. Plank. “Interaction mechanisms between Na montmorillonite clay and MPEG-based polycarboxylate superplasticizers”. Cement and Concrete Research, 42, 847-854 (2012).
  • 14. H. Tan, B. Gu, S. Jian. “Improvement of Polyethylene Glycol in Compatibility with Polycarboxylate Superplasticizer and Poor-Quality Aggregates Containing Montmorillonite”. Journal of Materials in Civil Engineering, 29, 04017131 (2017).
  • 15. M. C . G. Juenger and H. M. Jennings. “New insights into the effects of sugar on the hydration and microstructure of cement pastes”. Cement and Concrete Research, 32, 393-399 (2002).
  • 16. F. Zou, H. Tan, Y. Guo. “Effect of sodium gluconate on dispersion of polycarboxylate superplasticizer with different grafting density in side chain”. Journal of Industrial and Engineering Chemistry, 55, 91-100 (2017).
  • 17. H. Tan, F. Zou, B. Ma. “Effect of competitive adsorption between sodium gluconate and polycarboxylate superplasticizer on rheology of cement paste”. Construction and Building Materials, 144, 338-346 (2017).
  • 18. Y. Guo, B. Ma, Z. Zhi. “Effect of polyacrylic acid emulsion on fluidity of cement paste”. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 535, 139-148 (2017).
  • 19. G. Duan, G. Huang, A. Li. “A study of supermolecular polarization of comb-like polycarboxylate admixtures synthesized with polyoxyethylene macromolecules”. Journal of Molecular Liquids, 174, 129-134 (2012).
  • 20. Y. F . Houst, P. Bowen, F. Perche. “Design and function of novel superplasticizers for more durable high performance concrete (superplast project)”. Cement and Concrete Research, 38, 1197-1209 (2008).
  • 21. Y.R. Zhang and X.M. Kong. “Correlations of the dispersing capability of NSF and PCE types of superplasticizer and their impacts on cement hydration with the adsorption in fresh cement pastes”. Cement and Concrete Research, 69, 1-9 (2015).
  • 22. Y.R. Zhang, X.M. Kong, Z.B. Lu. “Effects of the charge characteristics of polycarboxylate superplasticizers on the adsorption and the retardation in cement pastes”. Cement and Concrete Research, 67, 184-196 (2015).
Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-be896436-9d22-4b4c-83e7-2ea1437ad42f
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