Charakterystyka mikrostruktury pianobetonu o różnych gęstościach przy zastosowaniu technik mikroskopowych

• Autorzy: Chung S. Y. , Lehmann C. , Elrahman M. A. , Stephan D.

Warianty tytułu

EN

Microstructural characterization of foamed concrete with different densities using microscopic techniques

• Języki publikacji: PL EN

Abstrakty

PL

W pracy przedstawiono wyniki badań próbek pianobetonów z użyciem skaningowej mikroskopii elektronowej oraz mikrotomografii rentgenowskiej. Scharakteryzowano porowatość oraz właściwości matrycy cementowej betonów po różnych czasach dojrzewania. Gęstość decyduje w pierwszej kolejności o mikrostrukturze matrycy cementowej, a co za tym idzie właściwości pianobetonów. Jak można się było spodziewać, matryca cementowa jest bardziej zwarta w pianobetonach o większej gęstości i dojrzewających przez dłuższy okres. Średnica porów zmniejsza się, wraz ze zwiększaniem się gęstości betonów i jest bardziej stabilna w późniejszych okresach.

EN

In this paper a set of foamed concrete specimens with different densities was prepared, and microscopic techniques such as scanning electron microscopy and X-ray micro-computed tomography were used to characterize the specimens. The pore and solid characteristics of the foamed concrete at different ages were also examined to investigate the effect of aging on the materials. The microstructure of cement matrix and thus the properties of foamed concrete are strongly affected by the density of concrete. As it should be expected, the cement matrix is denser in concrete of higher density and concrete cured for longer period. The pore size distribution of the foamed concrete shows the tendency to be composed of smaller pores as the density of the specimens is increasing and to became more stable after longer curing period.

Słowa kluczowe

PL

pianobeton; struktura porowa; rozkład porów; SEM; mikroskopia skaningowa; tomografia rentgenowska; wytrzymałość na ściskanie

EN

foamed concrete; pore structure; pore distribution; SEM; scanning electron microscope; X-ray tomography; compressive strength

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2018
• Tom: R. 21/83, nr 3
• Strony: 216--225
• Opis fizyczny: Bibliogr. 27 poz., il., tab.

Twórcy

autor

Chung S. Y.

• Building Materials and Construction Chemistry, Technische Universität Berlin, Germany

autor

Lehmann C.

• Building Materials and Construction Chemistry, Technische Universität Berlin, Germany

autor

Elrahman M. A.

• Building Materials and Construction Chemistry, Technische Universität Berlin, Germany
• Structural Engineering Department, Mansoura University, Egypt

autor

Stephan D.

• Building Materials and Construction Chemistry, Technische Universität Berlin, Germany

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).