Influence of addition of AI compound and gypsum on tobermorite formation in autoclaved aerated concrete studied by in situ X-ray diffraction

• Autorzy: Matsui K. , Ogawa A. , Kikuma J. , Tsunashima M. , Ishikawa T. , Matsuno S.
• Konferencja: 5th International Conference on Autoclaved Aerated Concrete "Securing a sustainable future" to be held at Bydgoszcz to celebrate 60 years of AAC experience in Poland, Bydgoszcz, September 14-17, 2011
• Języki publikacji: EN

Abstrakty

EN

The hydrothermal formation of tobermorite during the processing of autoclaved aerated concrete was investigated by in situ XRD analysis. The XRD measurement is carried out using high-energy X-rays from a synchrotron radiation source. The effects of AI and gypsum addition on tobermorite formation were studied. Acceleration of tobermorite formation by AI and gypsum addition was clearly observed. The tobermorite formation mechanisms were discussed in these systems.

Słowa kluczowe

EN

autoclaved aerated concrete; tobermorite; C-S-H phase; gypsum; Al dust; reaction kinetics; XRD examination

PL

beton komórkowy; tobermoryt; faza C-S-H; gips; pył Al; kinetyka reakcji; badanie XRD

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2011
• Tom: nr spec.
• Strony: 3--6
• Opis fizyczny: Bibliogr. 8 poz., il.

Twórcy

autor

Matsui K.

autor

Ogawa A.

autor

Kikuma J.

autor

Tsunashima M.

autor

Ishikawa T.

autor

Matsuno S.

• Construction Materials Laboratory, Asahi-KASEI Construction Materials Corporation, Japan

Bibliografia

• [1] Avrami M., 1939, Kinetics of phase change. I, J. Chem. Phys, 7, 1103-1112
• [2] Brown P.W., Pommersheim J,, Frohnsdorff G., 1985, A kinetic model for the hydration of tricalcium silicate, Cem. Concr. Res., 15, 35-41.
• [3] Hancock J.D., Sharp J.H., 1972, Method of comparing solid-state kinetic data and its application to the decomposition of kaolinite, brucite, and BaCO3, J. Am. Ceram. Soc., 55, 74-77.
• [4] Kikuma J., Tsunashima M., Ishikawa T., Matsuno S., Ogawa A., Matsui K., Salo M., 2009. Hydrothermal formation of tobermorilte studied by in-situ X-ray diffraction under autoclave condition, J. Synchrotron Rad., 16, 683-686.
• [5] Kikuma J., Tsunashima M., Ishikawa T., Matsuno S., Ogawa A., Matsui K., Sato M., 2010. In-situ time-resolved X-ray diffraction of tobermorite formation process under autoclave condition, J. Am. Ceram. Soc., 93, 2667-2674.
• [6] Larosa-Thompson J.L., Grutzeck M.W., 1996. C-S-H, tobermorite. and coexisting phases in the system CaO-Al2O3-SiO2-H2O, World Cement, 27, 69-74
• [7] Mitsuda, T., Sasaki K., Ishida H., 1992. Phase evolution during autoclaving process of aerated concrete, J. Am. Ceram. Soc., 75, 1858-1863.
• [8] Sakiyama M., Oshio Y., Mitsuda T., 2000, Influence of gypsum on the hydrothermal reaction of lime-quartz system and on the strength of autoclaved calcium silicate product, J. Soc. Inorganic Mater. Jpn., 7, 685-691.