Pore structure of self-compacting concretes made using different superplasticizers

• Autorzy: Gorzelańczyk T. , Hoła J.

Warianty tytułu

PL

Struktura porów w betonach samozagęszczonych wykonanych z użyciem różnych superplastyfikatorów

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of investigations into the pore structure of self-compacting concretes made from the same components, except for the added (two most commonly used in building practice) superplasticizers. It is shown that the pore structure depends on the superplasticizer used. Also the results of tests carried out to determine the mechanical properties of the investigated concretes, including their compressive strength and the levels of cracking initiating stress and critical stress (demarcating the particular stages in failure under compression), are presented. It is shown that the properties depend on the pore structure.

PL

W pracy przedstawiono wyniki badań struktury porów kilku betonów samozagęszczonych, wykonanych z użyciem takich samych składników i dwóch najczęściej stosowanych w praktyce superplastyfikatorów. Wykazano, że struktura porów zależy od użytego superplastyfikatora. Zaprezentowano także wyniki badań podstawowych cech mechanicznych badanych betonów, w tym wytrzymałości na ściskanie i poziomów naprężeń inicjujących pękanie i krytycznych rozgraniczających procesy niszczenia pod wpływem obciążeń ściskających. Wykazano, że cechy te zależą od struktury porów.

Słowa kluczowe

EN

pore structure; superplasticizer; self-compacting concrete; acoustic methods; failure

PL

samozagęszczalny beton; metody akustyczne; struktura porów; superplastyfikator

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2011
• Tom: Vol. 11, no 3
• Strony: 611--621
• Opis fizyczny: Bibliogr. 21 poz., tab., wykr.

Twórcy

autor

Gorzelańczyk T.

autor

Hoła J.

• Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

Bibliografia

• [1] Bień J.: Defects and diagnostics of bridge structures (in Polish), Wydawnictwa Komunikacji i Łączności, Warszawa, 2010.
• [2] Błaszczyński T.: Durability of cement based composite systems influenced by physico-chemical agents, Durability of polymer based composite systems for structural applications, ed. by Cardon & Verchery, Elsevier Science Publishers Ltd., 1991, pp. 504-513.
• [3] Błaszczyński T.Z.: The influence of crude oil products on RC structure destruction, Journal of Civil Engineering and Management, Vol. 17, No. 1, 2011, pp. 146-156.
• [4] Furtak K.: Concrete's destruction by stress, Conference: "Days of Concrete - Tradition and Modernity", Polski Cement, Szczyrk, 2002, pp. 427-439.
• [5] Gołaszewski J.: Influence of viscosity enhancing agent on rheology and compressive strength of superplasticized mortars, Journal of Civil Engineering and Management, Vol. 15, No. 2, 2009, pp. 181-188.
• [6] Gorzelańczyk T.: Assessment of the failure of self-compacting concretes by means of acoustic methods (in Polish), PhD dissertation. Reports of the Institute of Building Engineering at Wrocław University of Technology, Ser. PRE, No. 9, Wrocław, 2007.
• [7] Gorzelańczyk T., Hoła J.: Assessment of the failure of self-compacting concretes differing in their air pore structure by acoustic techniques, Defektoskopie 2007, 37th International Conference, Proceedings. Prague, Czech Republic, 2007, pp. 75-82.
• [8] Hoła J.: Relation of initiating and critical stress to stress failure (in Polish), Scientific Papers of the Institute of Building Engineering of the Wrocław University of Technology. No. 76, Monographs No. 33, Wrocław University of Technology Publishing House, Wrocław, 2000.
• [9] Hoła J.: Experimentally determined effects of technological and service factors on stressinduced destruction of concrete under compression. Engineering Transactions, Vol. 50, No. 4, 2002, pp. 251-265.
• [10] Hoła J., Kapelko A., Schabowicz K.: Non-destructive assessment of the strength of selfcompacting concrete, Technologies for sustainable development in regions. TECHSTA 2004, 4th International conference [Electronic document], Prague, CVUT, 2004, pp. 113-118.
• [11] Jamroży Z.: Concrete and its technologies (in Polish), Wydawnictwo Naukowe PWN, Warsaw-Cracow, 2005.
• [12] Kurdowski W.: Cement and concrete chemistry (in Polish), Association of Cement Producers, Cracow, 2010.
• [13] Li L., Hwang C.: The mixture proportion and property of SCC, Proceeding PRO33 - 3rd International RILEM Symposium: Self-Compacting Concrete. RILEM Publications S.A.R.L., 2003, pp. 525-529.
• [14] Łaźniewska-Piekarczyk B.: Effect of viscosity stabilizing agents on the properties of selfcompacting martars and concretes, Cement-Wapno-Beton, No. 1, 2011, pp. 44-51.
• [15] Mačiulaitis R., Vaičiene M., Žurauskiene R.: The effect of concrete composition and aggregates properties on performance of concrete, Journal of Civil Engineering and Management, Vol. 15, No. 3, 2009, pp. 317-324.
• [16] Mehta P.K.: Hardened cement paste-microstructure and its relation to properties, VIII International Congress Chem., Cement, Rio de Janerio, Vol. 1, 1986, pp. 113-121.
• [17] Nagamoto N., Ozawa K.: Mixture properties of self-compacting, high-performance concrete, ACI Materials Journal, Vol. 172, 1999, pp. 623-636.
• [18] Neville A.M.: Właściwości betonu, Polski Cement, Kraków, 2000.
• [19] Paczkowski P., Kaszyńska M., Nowak A.S., Lutomirski T.: Self-consolidating concrete for on-site bridge applications, Fifth international conference on current and future trends in Bridge design, construction and maintenance: proceedings of the two day international conference ed. Robert Lark London: Thomas Telford Publishing, 2007, pp. 312-320.
• [20] Szwabowski J., Łaźniewska-Piekarczyk B.: Air-entrainment problem in self-compacting concrete, Journal of Civil Engineering and Management, Vol. 15, No. 2, 2009, pp. 137-147.
• [21] The European Guidelines for Self-Compacting Concrete. Specification, Production and Use. EFNARC The European Federation of Specialist Construction Chemicals and Concrete Systems, May 2005. Available from internet: http://www.efnarc.org/ pdf/ SCCGuidelinesMay2005.pdf