Multi-walled carbon nanotubes with different features reinforced cement pastes: A compressive and systematic approach using principal component analysis

2020 ◽  
Vol 32 ◽  
pp. 101792
Author(s):  
Barış Şimşek
Keyword(s):  
Carbon Nanotubes ◽  
Principal Component Analysis ◽  
Systematic Approach ◽  
Principal Component ◽  
Component Analysis ◽  
Cement Pastes ◽  
Multi Walled Carbon Nanotubes ◽  
Reinforced Cement ◽  
Walled Carbon Nanotubes

Compressive Strength and Microstructure of Multi-Wall Carbon Nanotubes Reinforced Cement Composites

2012 ◽  
Vol 450-451 ◽  
pp. 594-599
Author(s):  
Jin Tao Liu ◽  
Dong Ming Yan ◽  
Shi Lang Xu
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Strength ◽  
Carbon Nanotube ◽  
Microscopic Analysis ◽  
Cement Composites ◽  
Cement Pastes ◽  
Multi Wall Carbon Nanotubes ◽  
Multi Walled Carbon Nanotubes ◽  
Reinforced Cement ◽  
Walled Carbon Nanotubes

Advancement in the study of carbon nanotube has enabled its application in civil engineering as constitutive materials or additives. In this study, the availability of applying multi-walled carbon nanotube to improve the characteristics of cement composites was investigated with experiments on more than 30 specimens. The multi-walled carbon nanotubes (MWCNTs) were effectively dispersed in the water with surfactant, which can keep stable for over 3 months. Specimens with MWCNTs of 0.025%, 0.05% and 0.1% of cement (by weight) were tested with a loading machine and then analyzed with a SEM. It was found that the compressive strength of the samples increased with the increasing MWCNTs, it can improve the 7-day compressive strength by 22% . Microscopic analysis (SEM) revealed that carbon nanotubes were surrounded with hydration products. The bridging and debonding of carbon nanotubes in cement pastes was observed as well.

The effect of multi-walled carbon nanotubes on the rheological properties and hydration process of cement pastes

2018 ◽  
Vol 189 ◽  
pp. 947-954 ◽  
Author(s):  
Dainius Leonavičius ◽  
Ina Pundienė ◽  
Giedrius Girskas ◽  
Jolanta Pranckevičienė ◽  
Modestas Kligys ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Rheological Properties ◽  
Hydration Process ◽  
Cement Pastes ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Using X-ray powder diffraction and principal component analysis to determine structural properties for bulk samples of multiwall carbon nanotubes

2007 ◽  
Vol 222 (3-4) ◽  
Author(s):  
Jette Oddershede ◽  
Kurt Nielsen ◽  
Kenny Stahl
Keyword(s):  
Carbon Nanotubes ◽  
Principal Component Analysis ◽  
Structural Properties ◽  
Powder Diffraction ◽  
Multiwall Carbon Nanotubes ◽  
Principal Component ◽  
Component Analysis ◽  
Structural Parameter ◽  
Inner Radius ◽  
Multiwall Carbon

It has been attempted to derive the structural properties of bulk multiwall carbon nanotubes (MWCNTs) from a combination of powder diffraction and principal component analysis (PCA). By a transformation of the direct PCA basis functions to a structural parameter set it was possible to obtain average values of inner radius, number of turns and

scholarly journals The investigation of multi-walled carbon nanotubes dispersion and its influence on rheological properties of cement systems

2018 ◽  
Vol 251 ◽  
pp. 01030
Author(s):  
Gintautas Skripkiunas ◽  
Grigory Yakovlev ◽  
Ekaterina Karpova
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Particle Size ◽  
Rheological Properties ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Cement Pastes ◽  
Multi Walled Carbon Nanotubes ◽  
Ph Level ◽  
Walled Carbon Nanotubes

The current research is devoted to the studying of multi-walled carbon nanotubes (MWCNT) dispersion and its influence on the rheological properties of cement pastes. The pH and electrical conductivity test, zeta potential measurements, particle size analysis were performed for characterization of MWCNT dispersion. The MWCNT dispersion were tested during 1 month and presented the decrease of pH level from 8.89 to 8.02, increase of electrical conductivity from 2.00 to 2.75 mS/cm. The particle size analysis did not reveal the significant changes during 1 month of storage. The rheological test of nanomodified cement pastes were performed for concentration of MWCNT dispersion in the range from 0 to 0.5% by weight of cement. The decrease of yield stress by 30.7% and increase of plastic viscosity by 29.6% were obtained for cement paste modified by MWCNT dispersion in dosage of 0.25% by weight of cement. The changes in flow behaviour were established for cement pastes tested in 5 min after mixing and were not observed for cement pastes tested after 120 min of mixing.

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