Tradycyjne i współczesne domieszki do betonu zmniejszające ilość wody zarobowej

• Autorzy: Kucharska L.

Warianty tytułu

EN

Traditional and modern mixing water reducing admixtures in concrete

• Języki publikacji: PL

Abstrakty

PL

Podano przykłady budowy chemicznej tradycyjnych i nowych domieszek do betonu zmniejszających ilość wody zarobowej, przedstawiono poglądy na temat ich oddziaływania z cementem, mechanizmu upłynniania, reologicznej kompatybilności cement-superplastyfikator, przyczyn krótkotrwałego efektu upłynnienia i sposobów zwiększania skuteczności działania superplastyfikatorów, ze zwróceniem uwagi na problemy związane z ich stosowaniem w praktyce budowlanej.

EN

Examples of the chemical structure of traditional and new mixing water reducing admixfures are given, and the views on the point of their interaction with cement, plasticizing mechanism, rheological compatibility cemen-tsuperplasticizer, plasticizing effect of short duration and means of increasing the effectiveness of superplasticizer action are presented with regard to the problems connected with their utilization in building practice.

Słowa kluczowe

PL

domieszka do betonu; domieszka uplastyczniająca; superplastyfikator; reakcja chemiczna

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2000
• Tom: R. 5/67, nr 2
• Strony: 46--61
• Opis fizyczny: Bibliogr. 37 poz., il., tab.

Twórcy

autor

Kucharska L.

• Politechnika Wrocławska, Instytut Budownictwa

Bibliografia

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• 2. C. Jolicoeur, M.A. Simard, Cement Interactions: Phenomenology and Physico-chemical Concepts, Cement and Concrete Composites 20, s. 67 (1998).
• 3. P.C. Aitcin, The use of superplastticizers in high performance concrete. W: High performance concrete: From materials to structure. 1992, s. 14, red. Yves Malier, E. FN Spon.
• 4. M. Collepardi, Admixtures used to enhance placing characteristics of concrete. Cement and Composites, 20, s. 103 (1988).
• 5. M.R. Rixom, The Economic Aspets of Admixture Use. Ibid, 2, s. 141.
• 6. Y.O. Tanaka, S. Matsuo, M. Ueda, A new admixture for high performance concrete. W: Proc. Int. Conf. Concrete in the Service of Mankind, 1995, s. 291, red. Ravindra K. Dhir, Peter C. Hewlet, FN Spon.
• 7. H.F.W. Taylor, Cement Chemistry. Academic Press 1988, s. 330.
• 8. M.R. Rixom, Chemical Admixtures for concrete. FN Spon, London 1978.
• 9. M. Fukuda, T. Mizunuma, T. Izumi, M. Iizuka, Slump control and properties of concrete with new superplasticizer, I. Laboratory study and tests method. W: Proc. Intern. RILEM Symposium on Admixtures for Concrete. s. 10, red. E. Vasquez. Chapman and Hall, London 1990.
• 10. N. Sakata, K. Maruyama, M. Minami, Basic properties and effcts of welan gum on selfconsolidating concrete. W: Proc. Int. RILEM Conf. Paisley, June 3-5 1996, Production Methods and Workability of Concrete, s. 236, Ed. P.J.M. Bartos, D.L. Marrs and D.J. Cleland, FN Spon.
• 11. T. Yonezawa, The contribution of fluidity improving technology to the widespread use of high-strength concrete. W: Radical Concrete Technology, s. 525, Ed. R.K., Dhir and P.C. Hewlett., FN Spon 1991.
• 12. Y. Tanaka, S. Okazawa, A new polycarboxylate based polimer: Chemistry and dispersing performance. W: Concrete 2000, s. 352, Ed. Ravindra K. Dhir and M. Roderic Jones, FN Spon 1993.
• 13. E. Fridrisberg, Kurs kolloidnoj chimii, s. 222 i 242 "Chimja" 1974.
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• 15. A. Mollach, P. Palta, T. Hess, Chemical and physical effects of sodium lignosulfonate superplasticizer on the hydration of Portland cement and solidification/stabilization consequences. Cem.Concr.Res. 25, 3, s. 671 (1995).
• 16. H. Uchikawa, S. Hanehara, O. Sawaki, The role of steric repulsive force in the dispersion of cement particles in fresh paste prepared with organic admixtures. Cem.Concr.Res. 27, 1, s. 37 (1997).
• 17. H. Uchikawa, Hydration of cement and structures formation and properties of cement paste in the presence of organic admixtures. Ibid 6, s. 3.
• 18. K. Luke, P.C. Aitcin, Effect of superplasticizer on ettringite formation. W: Ceramic Transactions, v. 16, Advances in Cementitious Materials 1992, s. 147. Red. S. Mindess.
• 19. H. Uchikawa, D. Sawaki, S. Hanehara, Influence of kind and added timing of organic admixture on the composition, structure and property of fresh cement paste. Cem.Concr.Res. 25, 2, s. 353 (1995).
• 20. U. Costa, F. Massazza, Cemento 81, s. 127 (1984).
• 21. E.V. Penttala, Effect of delayed dosage of superplasticizer on high performance concrete, s. 874.
• 22. G. Chiocchio, A.E. Paolini, Optimum time for adding superplasticizers to Portland cement pastes, Cem.Concr.Res. 15, s. 901 (1985).
• 23. K. Matsukawa, S. Diamond, Quantitative study of naphthalene sulfonate effects on cement paste pore solution. Ibid. 18, s. 41.
• 24. O. Bonem, S. Sarkar, The superplasticizer adsorption capacity of cement pastes, pore composites, and parameters affecting flow loss. Cem.Concr.Res. 25, 7, s. 1423 (1995).
• 25. R. Mannonem, V. Penttala, The efficiency of NSF-type superplastycizer in Portland cement pastes. Ibid. 10, s. 327.
• 26. V.T. Yilmaz, F.P. Glasser, Influence of sulphonated melamine formaldehyde superplasticizer on cement hydratation and microstructure. Adv. Cem. Res. 2, 7, s. 111 (1989).
• 27. L. Kucharska, M. Moczko, Influence of cement chemical composition on its response to superplasticizers addition in light of rheological tests. Proc. lnteruniversity Research Seminar, Eindhoven University of Technology, 1992, s. 135.
• 28. S. Jiang, B.K. Kim, P. Aitcin, Importance of adequate soluble alkali content to ensure cement/superplasticizer compatibility. Cem.Concr.Res. 29, s. 71 (1999).
• 29. L. Kucharska, Przyczyny zróżnicowanej podatności cementów portlandzkich na działanie superplastyfikatorów. Mat. XXXVII Konferencji KIUW PAN i KNP, tom 5, Krynica 1991, s. 31.
• 30. T. Nawa, H. Eguchi, Y. Fukaya, Effekt of alkali sulfate on the rheological behaviour of cement paste containing a superplasticizer. W: Proc. the 3rd CANAMET/ACI Int. Conf. On Superplasticizers and other Chemical Admixtures in Concrete, 1989, s. 405, ed. V.M. Malhotra, AGI SP-119.
• 31. R. Duval, E.H. Kadri, Influence of silica fume on the workability and the compressive strength of high-performance concretes. Cem.Concr.Res. 28, 4, s. 533 (1998).
• 32. W. Kurdowski, Chemia cementu. s. 171 i 196, PWN 1991.
• 33. G. Lim, S. Hong, D. Kim, B. Lee, J. Rho, Slump loss control of cement paste by adding polycarboxylic type slump-releasing dispersant. Cem.Concr.Res. 29, s. 223-229 (1999).
• 34. D. Rawina, I. Soroka, Slump loss and compressive strength of concrete made with WRR and HRWR. Cem.Concr.Res. 24, 8, s. 1455 (1994).
• 35. I. Soroka, D. Ravina, Weather concreting with admixtures. Cement Concrete Composites 20, s. 129 (1998).
• 36. L. Kucharska, W/C - wskaźnik wpływu warstwy przejściowej na właściwości mechaniczne betonów zwykłych i WWB i ich podziału. Cement-Wapno-Beton 2, s. 39 (1999).
• 37. M. Page, C. Jolicoeur, J. Beaudoin, Superplasticizer: Mode of action and influence on the microstructure. Produits Chimiques, Handy Ltee, CANADA J5R 1J2.