A neutron diffraction study of ice and water within a hardened cement paste during freeze–thaw

2001 ◽  
Vol 31 (12) ◽  
pp. 1821-1830 ◽  
Author(s):  
Ian P. Swainson ◽  
Erland M. Schulson
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Cement Paste ◽  
Neutron Diffraction Study ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Freeze Thaw

scholarly journals Salt frost attack on concrete: the combined effect of cryogenic suction and chloride binding on ice formation

2021 ◽  
Vol 54 (5) ◽  
Author(s):  
Matthias Müller ◽  
Horst-Michael Ludwig ◽  
Marianne Tange Hasholt
Keyword(s):  
Cement Paste ◽  
Damage Mechanism ◽  
Concrete Surface ◽  
Model Material ◽  
Ice Formation ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Scanning Calorimetry ◽  
Freeze Thaw ◽  
Ice Content

AbstractScaling of concrete due to salt frost attack is an important durability issue in moderate and cold climates. The actual damage mechanism is still not completely understood. Two recent damage theories—the glue spall theory and the cryogenic suction theory—offer plausible, but conflicting explanations for the salt frost scaling mechanism. The present study deals with the cryogenic suction theory, which assumes that freezing concrete can take up unfrozen brine from a partly frozen deicing solution during salt frost attack. According to the model hypothesis, the resulting saturation of the concrete surface layer intensifies the ice formation in this layer and causes salt frost scaling. In this study an experimental technique was developed that makes it possible to quantify to which extent brine uptake can increase ice formation in hardened cement paste (used as a model material for concrete). The experiments were carried out with low temperature differential scanning calorimetry, where specimens were subjected to freeze–thaw cycles while being in contact with NaCl brine. Results showed that the ice content in the specimens increased with subsequent freeze–thaw cycles due to the brine uptake at temperatures below 0 °C. The ability of the hardened cement paste to bind chlorides from the absorbed brine at the same time affected the freezing/melting behavior of the pore solution and the magnitude of the ice content.

A neutron–diffraction study of changes induced in aluminous cement paste by the application of external electric fields

2004 ◽  
Vol 350 (1-3) ◽  
pp. E561-E564 ◽  
Author(s):  
Marta Castellote ◽  
Xavier Turrillas ◽  
Irene Llorente ◽  
Cruz Alonso ◽  
Carmen Andrade ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Electric Fields ◽  
Cement Paste ◽  
Neutron Diffraction Study ◽  
External Electric Fields ◽  
Aluminous Cement

Neutron diffraction study of nickel zirconium hydride

1964 ◽  
Vol 25 (5) ◽  
pp. 451-453 ◽  
Author(s):  
S.W. Peterson ◽  
V.N. Sadana ◽  
W.L. Korst
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Neutron Diffraction Study ◽  
Zirconium Hydride

A NEUTRON DIFFRACTION STUDY OF CuSeO4

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-855-C1-856 ◽  
Author(s):  
W. SCHARENBERG ◽  
G. WILL
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Neutron Diffraction Study

NEUTRON DIFFRACTION STUDY OF ErFe2

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-675-C1-676 ◽  
Author(s):  
M. O. BARGOUTH ◽  
G. WILL
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Neutron Diffraction Study

NEUTRON DIFFRACTION STUDY OF THE Ho-Fe SYSTEM

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-670-C1-671 ◽  
Author(s):  
J. M. MOREAU ◽  
C. MICHEL ◽  
M. SIMMONS ◽  
T. J. O'KEEFE ◽  
W. J. JAMES
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Neutron Diffraction Study
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