Volumetric strains of cement-based mortars caused by ice formation in terms of frost resistance diagnostics

• Autorzy: Rusin Z. , Świercz P.

Identyfikatory

DOI

10.1515/bpasts-2015-0005

• Języki publikacji: EN

Abstrakty

EN

The paper presents the volumetric strain test results of differently composed cement mortar samples during the phase transformation of water into ice, and juxtaposes the results with other relevant indicators, such as the water absorption and the degree of filling pores with water. It also presents the possibility of using these observations in terms of frost resistance diagnostics. The investigation covered non-airentrained mortars, which were also subjected to the vacuum treatment and vibration to reduce the air content. It was found experimentally that the volumetric strain of mortar samples soaked in water under vacuum at ΔV/V < 2‰ means the mortar of high frost resistance. ΔV/V > 4‰ indicates that the mortar requires air-entraining regardless of the microstructure and kind of cement.

Słowa kluczowe

EN

cement mortar; volumetric strain; absorption; degree of filling; frost resistance

PL

zaprawa cementowa; szczepy objętościowe; absorpcja; stopień napełnienia; odporność na mróz

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2015
• Tom: Vol. 63, nr 1
• Strony: 35--41
• Opis fizyczny: Bibliogr. 12, tab., wykr., rys.

Twórcy

autor

Rusin Z.

• Faculty of Civil Engineering and Architecture, Kielce University of Technology, 7 Tysiąclecia Państwa Polskiego Ave., 25-314 Kielce, Poland

autor

Świercz P.

• Faculty of Civil Engineering and Architecture, Kielce University of Technology, 7 Tysiąclecia Państwa Polskiego Ave., 25-314 Kielce, Poland

Bibliografia

• [1] J.P. Kaufmann, “Experimental identification of ice formation in small concrete pores”, Cement and Concrete Research 34, 1421-1427 (2004).
• [2] V. Penttala and F. Al-Neshawy, “Stress and strain state of concrete during freezing and thawing cycles”, Cement and Concrete Research 32, 1407-1420 (2002).
• [3] Z. Rusin, G. Stelmaszczyk, and P. Świercz, “Differential analysis of volumetric strains in porous materials in terms of water freezing”, Ceramics-Silikaty 57, 103-107 (2013).
• [4] Z. Rusin, G. Stelmaszczyk, P. Świercz, and Ł. Nowak, “Prediction of frost resistance of concrete with water/cement ratio < 0.45”, in Ministry of Science and Higher Education. Research Project No. 5 T07E 016 25, Kielce University of Technology, Kielce, 2007.
• [5] P. Świercz, “Influence of fly ash content in cement on the volumetric strains of frozen cement mortars”, PhD Thesis, Kielce University of Technology, Kielce, 2013.
• [6] H.M. Jennings, “A model for the microstructure of calcium silicate hydrate in cement paste” Cement and Concrete Research 30, 101-116 (2000).
• [7] O. Coussy and P.J.M. Monteiro, “Poroelastic model for concrete exposed to freezing temperatures”, Cement and Concrete Research 38, 40-48 (2008).
• [8] G. Fagerlund, “Critical degrees of saturation at freezing of porous and brittle materials”, Lund Institute of Technology, ISSN 346-864X, Lund, 1973.
• [9] Z. Rusin, “Indicator of aggregate usability in frost-resistant concretes”, XXXII Sci. Conf. Committee Civil Engineering Polish Sciences Academy 4, 161-166 (1986).
• [10] T.D. Larson and P.D. Cady, “ Identification of frost-susceptible particles in concrete aggregates”, NCHR Program Report 66, CD-ROM (1969).
• [11] G. Fagerlund, “Frost resistance of concrete with porous aggregate”, Swedish Cement and Concrete Research Institute, Research 2:78, 189 (1978).
• [12] M.J. Setzer, “Micro-ice-lens formation in porous solid”, J.Colloid and Interface Science 243, 193-201 (2001).