Wpływ minerałów ilastych na właściwości zaczynu cementowego z dodatkiem naftaleno-sulfonianu sodowego

• Autorzy: Tan H. , Lin C. , Yang H. , Ma B. , Qi C. , Li X.

Warianty tytułu

EN

Effect of clay minerals on the properties of cement paste with the addition of sodium naphthalene sulphonate superplasticizer

• Języki publikacji: PL EN

Abstrakty

PL

W pracy zbadano wpływ dodatku minerałów ilastych do cementu, a mianowicie kaolinitu i montmorillonitu na właściwości zaczynu z równoczesnym dodatkiem superplastyfikatora naftalenowego. Przeprowadzone doświadczenia wykazały, że adsorpcja plastyfikatora przez kaolinit i montmorillonit, badane za pomocą spektrometru promieniowania ultrafioletowego, była mniejsza niż cementu. Jednak szereg właściwości zaczynu uległo pogorszeniu, a szczególnie skurcz suszenia zaczynu cementowego zwiększył się, a wytrzymałość na ściskanie uległa zmniejszeniu. Wodożądność wzrosła bardzo znacznie, a konsystencja zaczynu uległa pogorszeniu. W podsumowaniu można stwierdzić, że należy unikać występowania w betonie minerałów ilastych, gdyż mają one niekorzystny wpływ na właściwości tego kompozytu.

EN

In the paper the investigations of the effect of clay minerals addition, namely kaolinite and montmorillonite, to cement on the properties of cement paste with sodium naphthalene sulfonate superplasticizer(NS) are presented. The studies have shown that the adsorption of NS by kaolinite and montmorillonite, determined by UV-VIS spectrophotometer, was lower than that of cement, but several cement paste properties were worse. Particularly the drying shrinkage of cement paste was increasing and the compressive strength was much lower as well as water demand was drastically increased and consistency of the paste was decreased. Summarizing the presence of clay minerals should be avoided in concrete because they have very disadvantage effect on the properties of this composite.

Słowa kluczowe

PL

zaczyn cementowy; modyfikacja; kaolinit; montmorylonit; superplastyfikator naftalenowy; adsorpcja; właściwości reologiczne; skurcz; wytrzymałość na ściskanie

EN

cement paste; modification; kaolinite; montmorilonite; naphthalene superplasticizer; adsorption; rheological properties; shrinkage; compressive strength

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2015
• Tom: R. 20/82, nr 3
• Strony: 193--200
• Opis fizyczny: Bibliogr. 18 poz., il., tab.

Twórcy

autor

Tan H.

• State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China

autor

Lin C.

• State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China

autor

Yang H.

• State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China

autor

Ma B.

• State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China

autor

Qi C.

• State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China

autor

Li X.

• State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, China

Bibliografia

• 1. P.-C. Aïtcin, Admixtures: Essential Components of Modern Concrete, Cement Wapno Beton, 73, 277 (2006).
• 2. M. Aly, M. S. J. Hashmi, A. G. Olabi, M. Messeiry, A. I. Hussain, Effect of nano clay particles on mechanical, thermal and physical behaviors of wasteglass cement mortars. Mat. Scien. Eng. A., 528, 27, 7991-7998 (2011).
• 3. D. Atarashi, Interaction between Superplasticizers and clay minerals. Japan Cement Association, 58, 287-392 (2005).
• 4. B. Felekoglu, H. Sarıkahya, Effect of chemical structure of polycarboxylate-based superplasticizers on workability retention of self-compacting concrete. Constr. Build. Mat., 22, 9, 1972-1980 (2008).
• 5. R. J. Flatt, Y. F. Houst, A simplified view on chemical effects perturbing the action of superplasticizers, Cem. Concr. Res., 31, 8, 1169-1176 (2001).
• 6. J. K. Norvell, J. G. Stewart, M. C. G. Juenger, D. W. Fowler, Influence of clays and clay-sized particles on concrete performance, Journal of Materials in Civil Engineering, 19, 12, 1053-1059 (2007).
• 7. B. M. Olga, M. Palacios, P. Rivilla, Compatibility between superplasticizer admixtures and cements with mineral additions, Constr. Build. Mat., 31, 300-309 (2012).
• 8. M. Palacios, Y. F. Houst, P. Bowen, F. Puertas, Adsorption of superplasticizer admixtures on alkali-activated slag pastes, Cem. Concr. Res., 39, 8, 670-677 (2009).
• 9. A. Peschard, A. Govina, J. Pourchez, E. Fredon, L. Bertrand, S. Maximilien, B. Guilhot, Effect of polysaccharides on the hydration of cement suspension. Journal of the European Ceramic Society, 26, 8, 1439–1445 (2006).
• 10. J. Plank, Z. Dai, N. Zouaoui, D. Vlad, 2006. Intercalation of polycarboxylate superplasticizers into C3A hydrate phases 8th CANMET/ACI conference on superplasticizers and other chemical admixtures in concrete, pp. 201-214, ACI Sorrento 2006.
• 11. J. Plank, C. Hirsch, Impact of zeta potential of early cement hydration phases on superplasticizer adsorption. Cem. Concr. Res., 37, 4, 537-542 (2007).
• 12. Q. P. Ran, P. Somasundaran, C. W. Miao, J. P. Liu, S.S. Wu, Effect of the length of the side chains of comb-like copolymer dispersants on dispersion and rheological properties of concentrated cement suspensions, Journal of Colloid and Interface Science, 336, 2, 624-633 (2009).
• 13. B. Tiwari, B. Ajmera, Consolidation and swelling behavior of major clay minerals and their mixtures. Applied Clay Science, 54, 3-4, 264-273 (2011).
• 14. P. Q. Wang, The study for quantitative analysis water on clays and their hydration mechanism (in Chinese), Southwest Petroleum University 2003.
• 15. K. Yamada, S. Ogawe, S. Hanehava, Working mechanism of poly-betanaphthalene sulfonate and polycarboxylate superplasticizer types from point of cement caste characteristics. In: V. M. Malhota. Porceedings of the 6th International CANMET/ACI Conference on superplasticizer and other chemical admixtures in concrete, SP-195, 367-382, American Concrete Institute, Detroit 2000.
• 16. K. Yoshioka, E. Tazawa, K. Kawai, T. Enohata, Adsorption characteristics of superplasticizers on cement component minerals, Cem. Concr. Res., 37, 10, 1507-1513 (2002).
• 17. L. M. Zhang, X. H. Huang, X. L. Song, Fundaments of materials science (2nd Edition, in Chinese), pp.66-69, Wuhan: Wuhan University of Technology Press 2008.
• 18. D. F. Zhang, B. Z. Ju, S. F. Zhang, J. Z. Yang, The study on the dispersing mechanism of starch sulfonate as a water-reducing agent for cement. Carbohydrate Polymers, 70, 4, 363-368 (2007).