Wpływ polimeru butadienowo-styrenowego na wczesną hydratację cementu

• Autorzy: Wang R. , Shi X.

Warianty tytułu

EN

Influence of styrene-butadiene rubber latex on the early hydration of cement

• Języki publikacji: PL EN

Abstrakty

PL

W pracy badano wpływ dodatku kopolimeru styrenowo-butadienowego (SBR) na wczesną hydratację cementu. Badania wykazały, że kopolimer SBR opóźnia wiązanie cementu i efekt ten wzrasta ze wzrostem dodatku. Kopolimer SBR zwiększa więc okres indukcji, opóźnia okres wzrastającej szybkości reakcji, a także zwiększa hydratację w okresach zmniejszania szybkości reakcji i małej szybkości reakcji. Ciepło hydratacji i jej stopień w przypadku cementu z dodatkiem SBR jest większy niż wzorca, po 48 godzinach. SBR przyspiesza powstawanie i zwiększa trwałość ettringitu. SBR utrudnia i opóźnia powstawanie CH.

EN

Early hydration of cement in the presence of styrene-butadiene rubber (SBR) latex was investigated in this paper. The initial/final setting time, hydration heat, hydration degree, hydrates of calcium aluminate and hydrates of calcium silicate were analyzed. The results show that SBR latex retards the initial/final setting of cement. The more SBR latex is added, the stronger the retarding effect. SBR latex prolongs the induction period of cement hydration, postpones the accelerating period but promotes the decelerating and stable periods. The hydration heat and hydration degree of cement with SBR latex is higher than the control one after 48 hours. SBR latex promotes the formation and enhances the stability of ettringite. SBR latex also inhibits and retards the formation of CH.

Słowa kluczowe

PL

zaprawa cementowa; zaprawa modyfikowana polimerem; lateks butadienowo-styrenowy; SBR; hydratacja; wydzielanie ciepła; czas wiązania

EN

cement mortar; polymer modified mortar; styrene-butadiene latex; SBR; hydration process; heat release; setting time

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2016
• Tom: R. 21/83, nr 1
• Strony: 36--45
• Opis fizyczny: Bibliogr. 21 poz., il., tab.

Twórcy

autor

Wang R.

• Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education; School of Materials Science and Engineering, Tongji University, Shanghai, China

autor

Shi X.

• Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education; School of Materials Science and Engineering, Tongji University, Shanghai, China

Bibliografia

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• 18. Z. X. Yang, X. M. Shi, C. Andrew et al., Effect of styrene-butadiene rubber latex on the chloride permeability and microstructure of Portland cement mortar, Constr. Build. Mat., 23, 6, 2283-2290 (2009).
• 19. X. X. Shi, R. Wang, P. M. Wang, Dispersion and absorption of SBR latex in the system of mono-dispersed cement particles in water, In Proceedings of the 14th International Congress on Polymers in concrete, pp. 347-353, Ru Wang, Zhenghong Yang, Shanghai, China 2013.
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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.