A study of deterioration of cement paste due to acid attack using X-ray computed micro-tomography

2018 ◽  
Vol 30 (3) ◽  
pp. 123-138 ◽  
Author(s):  
Koodalloor P. Ramaswamy ◽  
Manu Santhanam
Keyword(s):  
Cement Paste ◽  
Acid Attack ◽  
X Ray ◽  
X Ray Computed ◽  
Micro Tomography

A new species of anapid spider (Araneae: Araneoidea, Anapidae) in Eocene Baltic amber, imaged using phase contrast X-ray computed micro-tomography

Zootaxa ◽  
2011 ◽  
Vol 2742 (1) ◽  
pp. 60 ◽  
Author(s):  
DAVID PENNEY ◽  
ANDREW MCNEIL ◽  
DAVID I. GREEN ◽  
ROBERT BRADLEY ◽  
YURI M. MARUSIK ◽  
...  
Keyword(s):  
New Species ◽  
Phase Contrast ◽  
Baltic Amber ◽  
X Ray ◽  
The Family ◽  
X Ray Computed ◽  
Micro Tomography ◽  
The Baltic ◽  
A New Species ◽  
Eocene Amber

A new species of the extant spider family Anapidae is described from a fossil mature male in Eocene amber from the Baltic region and tentatively assigned to the genus Balticoroma Wunderlich, 2004. Phase contrast X-ray computed micro-tomography was used to reveal important features that were impossible to view using traditional microscopy. Balticoroma wheateri new species is easily diagnosed from all other anapids by having clypeal extensions that run parallel to the ectal surface of the chelicerae and in having the metatarsus of the first leg highly reduced and modified into what is presumably a y-shaped clasping structure. Although only a single extant anapid species occurs in northern Europe, the family was diverse in the Eocene. The discovery of yet another anapid species in Baltic amber supports the idea that Eocene European forests may have been a hotspot of evolution for this family of spiders.

Density mapping of hardened cement paste using ptychographic X-ray computed tomography

2013 ◽  
Vol 36 ◽  
pp. 71-77 ◽  
Author(s):  
Pavel Trtik ◽  
Ana Diaz ◽  
Manuel Guizar-Sicairos ◽  
Andreas Menzel ◽  
Oliver Bunk
Keyword(s):  
Computed Tomography ◽  
Cement Paste ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
X Ray ◽  
Density Mapping ◽  
X Ray Computed

Effect of Fly Ash on the early Age Cracking Performance of Cement Paste

2014 ◽  
Vol 584-586 ◽  
pp. 894-898
Author(s):  
Ping Zhang ◽  
Guan Guo Liu ◽  
Chao Ming Pang ◽  
Bing Du ◽  
Hong Gen Qin
Keyword(s):  
Computed Tomography ◽  
Fly Ash ◽  
Cement Paste ◽  
Test Method ◽  
Early Age ◽  
Cement Ratio ◽  
X Ray ◽  
Cracking Performance ◽  
X Ray Computed ◽  
Ct Test

The X ray computed tomography (X-CT) was applied to test the cracking resistance of cement paste, and the hydration process was monitored to study the effect of fly ash on the early age cracking performance. The results showed that the hydration heat reduced with the increase of fly ash under the same water-cement ratio. Within 24h, the porosity increased with time. The addition of fly ash increased the proportion of large holes and then changed the internal stress state. Using X-CT test method and by comparing the number of cracks, the sample with 20% FA was found to have the most serious cracks, whereas the sample with 30% FA had the best crack resistance.

Visualization of Penetration of NanoSiO2 into Cement Paste Using X-ray Computed Tomography

2018 ◽  
Vol 10 (1) ◽  
pp. 135-137
Author(s):  
Yue Gu ◽  
Qianping Ran ◽  
Zhenhua Wei ◽  
Wei She ◽  
Jiaping Liu
Keyword(s):  
Computed Tomography ◽  
Cement Paste ◽  
X Ray ◽  
X Ray Computed

scholarly journals Modelling particle scale leach kinetics based on X-ray computed micro-tomography images

2016 ◽  
Vol 162 ◽  
pp. 25-36 ◽  
Author(s):  
Q. Lin ◽  
D.J. Barker ◽  
K.J. Dobson ◽  
P.D. Lee ◽  
S.J. Neethling
Keyword(s):  
X Ray ◽  
X Ray Computed ◽  
Micro Tomography

X-ray computed micro-tomography to study the porous structure and degradation processes of a building stone from Sabucina (Sicily)

2015 ◽  
Vol 27 (3) ◽  
pp. 279-288 ◽  
Author(s):  
Simona Raneri ◽  
Veerle Cnudde ◽  
Tim De Kock ◽  
Hannelore Derluyn ◽  
Germana Barone ◽  
...  
Keyword(s):  
Porous Structure ◽  
Building Stone ◽  
X Ray ◽  
Degradation Processes ◽  
X Ray Computed ◽  
Micro Tomography
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