The evolution of cement paste hydration process by impedance spectroscopy

2001 ◽  
Vol 303 (1-2) ◽  
pp. 54-59 ◽  
Author(s):  
G. Dotelli ◽  
C.M. Mari
Keyword(s):  
Impedance Spectroscopy ◽  
Cement Paste ◽  
Hydration Process

scholarly journals Effect of nano-SnO2 on early-age hydration of Portland cement paste

2019 ◽  
Vol 11 (6) ◽  
pp. 168781401985194 ◽  
Author(s):  
Jianping Zhu ◽  
Genshen Li ◽  
Ruijie Xia ◽  
Huanhuan Hou ◽  
Haibin Yin ◽  
...  
Keyword(s):  
Portland Cement ◽  
Cement Paste ◽  
Cement Hydration ◽  
Cementitious Materials ◽  
Hydration Process ◽  
Strength Development ◽  
Early Age ◽  
Test Machine ◽  
Portland Cement Paste ◽  
Scanning Electron

Nanomaterial, as a new emerging material in the field of civil engineering, has been widely utilized to enhance the mechanical properties of cementitious material. Nano-SnO2 has presented high hardness characteristics, but there is little study of the application of nano-SnO2 in the cementitious materials. This study mainly investigated the hydration characteristics and strength development of Portland cement paste incorporating nano-SnO2 powders with 0%, 0.08%, and 0.20% dosage. It was found that the early-age compressive strength of cement paste could be greatly improved when nano-SnO2 was incorporated with 0.08% dosage. The hydration process and microstructure were then measured by hydraulic test machine, calorimeter, nanoindentation, X-ray diffraction, scanning electron microscope, and mercury intrusion porosimetry. It was found that the cement hydration process was promoted by the addition of nano-SnO2, and the total amount of heat released from cement hydration is also increased. In addition, the addition of nano-SnO2 can promote the generations of high density C-S-H and reduce the generations of low density C-S-H indicating the nucleation effect of nano-SnO2 in the crystal growth process. The porosity and probable pore diameter of cement paste with 0.08% nano-SnO2 were decreased, and the scanning electron microscopic results also show that the cement paste with 0.08% nano-SnO2 promotes the densification of cement microstructure, which are consistent with the strength performance.

Hydration process of rice husk ash cement paste and its corrosion resistance of embedded steel bar

2020 ◽  
Vol 27 (11) ◽  
pp. 3464-3476
Author(s):  
Hui Wang ◽  
Ai-lian Zhang ◽  
Lin-chun Zhang ◽  
Qian Wang ◽  
Yan Han ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Cement Paste ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Hydration Process ◽  
Steel Bar

scholarly journals The effect of micelles with random pH-sensitive/hydrophobic structure on the workability, hydration process and microstructure of cement paste

RSC Advances ◽  
2017 ◽  
Vol 7 (28) ◽  
pp. 17085-17094 ◽  
Author(s):  
Y. Y. Zhu ◽  
J. Hu ◽  
Y. W. Ma ◽  
H. B. Xie ◽  
W. H. Guo ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Cement Paste ◽  
Ph Sensitive ◽  
Hydration Process ◽  
Nucleation Effect

In this study, micelles with pH sensitive/hydrophobic structure efficiently affected the workability, hydration and microstructure of cement paste. The mechanisms are related to the nucleation effect, molecular structure and adsorption of micelles.

Impedance spectroscopy to characterize the pore structure during the hardening process of Portland cement paste

2006 ◽  
Vol 51 (8-9) ◽  
pp. 1831-1841 ◽  
Author(s):  
M. Cabeza ◽  
M. Keddam ◽  
X.R. Nóvoa ◽  
I. Sánchez ◽  
H. Takenouti
Keyword(s):  
Impedance Spectroscopy ◽  
Portland Cement ◽  
Pore Structure ◽  
Cement Paste ◽  
Hardening Process ◽  
Portland Cement Paste

Interpretation of the impedance spectroscopy of cement paste via computer modelling

1994 ◽  
Vol 29 (19) ◽  
pp. 4984-4992 ◽  
Author(s):  
R. T. Coverdale ◽  
B. J. Christensen ◽  
T. O. Mason ◽  
H. M. Jennings ◽  
E. J. Garboczi
Keyword(s):  
Impedance Spectroscopy ◽  
Cement Paste ◽  
Computer Modelling
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