scholarly journals Evaluation of Microstructure and Transport Properties of Deteriorated Cementitious Materials from Their X-ray Computed Tomography (CT) Images

Materials ◽  
2016 ◽  
Vol 9 (5) ◽  
pp. 388 ◽  
Author(s):  
Michael Promentilla ◽  
Shermaine Cortez ◽  
Regina Papel ◽  
Bernadette Tablada ◽  
Takafumi Sugiyama
Keyword(s):  
Computed Tomography ◽  
Transport Properties ◽  
Cementitious Materials ◽  
Ct Images ◽  
X Ray ◽  
X Ray Computed

scholarly journals Using X-Ray CT Scanning to Study the Failure Mechanism of Concrete under Static and Dynamic Loadings

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Guangyu Lei ◽  
Jichang Han ◽  
Faning Dang
Keyword(s):  
Computed Tomography ◽  
Failure Mechanism ◽  
Static Load ◽  
Ct Scanning ◽  
Ct Images ◽  
X Ray ◽  
Dynamic Loadings ◽  
Ultimate Failure ◽  
X Ray Computed ◽  
Straight Lines

X-ray images can be used to nondestructively monitor the initiation, extension, and combination of cracks in concrete. In this study, real-time X-ray computed tomography (CT) scanning of concrete specimens under static and dynamic loadings was done. The CT images showed the growth, propagation, and penetration of the cracks and showed the ultimate failure of the concrete samples. Analysis of the CT images and CT numbers showed that the failure followed the structure’s areas of weakness under the static load, but for dynamic loading, the cracks formed very rapidly along straight lines through the aggregate.

On the use of X-ray computed tomography for determining wood properties: a review1This article is a contribution to the series The Role of Sensors in the New Forest Products Industry and Bioeconomy.

2011 ◽  
Vol 41 (11) ◽  
pp. 2120-2140 ◽  
Author(s):  
Qiang Wei ◽  
Brigitte Leblon ◽  
Armand La Rocque
Keyword(s):  
Computed Tomography ◽  
Growth Ring ◽  
Back Propagation ◽  
Forest Products ◽  
Ct Images ◽  
Ct Scanner ◽  
Forest Products Industry ◽  
X Ray ◽  
Feed Forward Back Propagation ◽  
X Ray Computed

In several processes of the forest products industry, an in-depth knowledge of log and board internal features is required and their determination needs fast scanning systems. One of the possible technologies is X-ray computed tomography (CT) technology. Our paper reviews applications of this technology in wood density measurements, in wood moisture content monitoring, and in locating internal log features that include pith, sapwood, heartwood, knots, and other defects. Annual growth ring measurements are more problematic to be detected on CT images because of the low spatial resolution of the images used. For log feature identification, our review shows that the feed-forward back-propagation artificial neural network is the most efficient CT image processing method. There are also some studies attempting to reconstruct three-dimensional log or board images from two-dimensional CT images. Several industrial prototypes have been developed because medical CT scanners were shown to be inappropriate for the wood industry. Because of the high cost of X-ray CT scanner equipment, other types of inexpensive sensors should also be investigated, such as electric resistivity tomography and microwaves. It also appears that the best approach uses various different sensors, each of them having its own strengths and weaknesses.

scholarly journals Characterization of air-void systems in 3D printed cementitious materials using optical image scanning and X-ray computed tomography

2021 ◽  
Vol 173 ◽  
pp. 110948
Author(s):  
Yu Chen ◽  
Oğuzhan Çopuroğlu ◽  
Claudia Romero Rodriguez ◽  
Fernando F. de Mendonca Filho ◽  
Erik Schlangen
Keyword(s):  
Computed Tomography ◽  
Cementitious Materials ◽  
Optical Image ◽  
Image Scanning ◽  
X Ray ◽  
3D Printed ◽  
X Ray Computed ◽  
Air Void

scholarly journals Study of the evolution of transport properties induced by additive processing sand mold using X-ray computed tomography

2020 ◽  
Vol 277 ◽  
pp. 116495
Author(s):  
Saptarshee Mitra ◽  
Mohamed EL Mansori ◽  
Antonio Rodríguez de Castro ◽  
Marius Costin
Keyword(s):  
Computed Tomography ◽  
Transport Properties ◽  
Sand Mold ◽  
X Ray ◽  
X Ray Computed
Sign in / Sign up

Export Citation Format

Share Document