scholarly journals Microstructure and water absorption of ancient concrete from Pompeii: An integrated synchrotron microtomography and neutron radiography characterization

2021 ◽  
Vol 139 ◽  
pp. 106282 ◽  
Author(s):  
Ke Xu ◽  
Anton S. Tremsin ◽  
Jiaqi Li ◽  
Daniela M. Ushizima ◽  
Catherine A. Davy ◽  
...  
Keyword(s):  
Water Absorption ◽  
Neutron Radiography ◽  
Synchrotron Microtomography

scholarly journals Study of Homogeneity and Water Absorption Behavior of Double Layer Silver Gray Tiles Using Film Neutron Radiography Technique

1970 ◽  
Vol 43 (2) ◽  
pp. 197-206
Author(s):  
MK Alam ◽  
MN Islam ◽  
MA Zaman
Keyword(s):  
Water Absorption ◽  
Double Layer ◽  
Optical Density ◽  
Immersion Time ◽  
Building Materials ◽  
Neutron Radiography ◽  
Radiographic Image ◽  
Radiographic Images ◽  
Building Products ◽  
Density Values

Neutron radiography (NR) technique has been adopted to study homogeneity and water absorption behavior of building materials, like double layer silver gray tiles obtained from Concord Real Estate & Building Products, Unit II, Salna, Gazipur, Dhaka, Bangladesh. Measurements of optical density differences between the film background and radiographic images of the dry/wet samples were used for investigation of the present work. The optical density was measured by using the digital optical densitometer (Model 07-424, S-23285, Victoreen Inc. USA). Large variation in optical density values of the radiographic image was observed. From this observation it shows that the rate of water absorption of the tiles increases with increase of immersion time. Through the investigation of radiographic image and subsequently analyzing the optical density we observed that distribution of the elements in the tiles are inhomogeneous. Key words: Homogeneity, Water absorption, Silver gray, Neturon radiography.DOI: 10.3329/bjsir.v43i2.963 Bangladesh J. Sci. Ind. Res. 43(2), 197-206, 2008

Water Absorption into Construction Materials: Comparison of Neutron Radiography Data with Network Absorption Models

2006 ◽  
Vol 63 (3) ◽  
pp. 503-525 ◽  
Author(s):  
Cathy J. Ridgway ◽  
Patrick A. C. Gane ◽  
Abd El-Ghany El Abd ◽  
Andrzej Czachor
Keyword(s):  
Water Absorption ◽  
Neutron Radiography ◽  
Construction Materials ◽  
Absorption Models

Study of Water Absorption Behavior in Wood Plastic Composites by Using Neutron Radiography Techniques

2003 ◽  
Vol 42 (5) ◽  
pp. 925-934 ◽  
Author(s):  
M. N. Islam ◽  
Mubarak A. Khan ◽  
M. K. Alam ◽  
M. A. Zaman ◽  
M. Matsubayashi
Keyword(s):  
Water Absorption ◽  
Neutron Radiography ◽  
Wood Plastic Composites ◽  
Plastic Composites

scholarly journals Comparative Study of Water Absorption Behavior of Indian and Pakistani Tiles Using Conventional Neutron Radiography Technique

1970 ◽  
Vol 46 (1) ◽  
pp. 53-58
Author(s):  
MK Alam ◽  
MN Islam ◽  
MA Zaman
Keyword(s):  
Water Absorption ◽  
Immersion Time ◽  
Neutron Radiography ◽  
Raw Materials ◽  
Single Layer ◽  
The Other ◽  
Radiographic Images ◽  
Indian Origin ◽  
Wet Condition ◽  
Construction Purpose

Neutron radiography (NR) technique has been adopted to study water absorption behavior of single layer tiles made of India and Pakistani raw materials, obtained from Concord Real Estate & Building Products, Shalna, Gazipur, Dhaka, Bangladesh. Measurements were made to study the water absorption behavior of the tiles at different immersion time within the range of 24 hours using conventional NR technique. A series of neutron radiographs of these tiles have been taken at dry and wet condition to observe the water absorption behavior. The optical density differences between the film background and at different reference positions of the radiographic images of the dry and wet samples were measured. In the work it was observed that the water absorption in tiles of Indian origin is less than the other ones. Thus the former one seems better to use for construction purpose. Key words: Neutron radiography; Homogeneity; Water absorption behavior DOI: http://dx.doi.org/10.3329/bjsir.v46i1.8107 Bangladesh J. Sci. Ind. Res. 46(1), 53-58, 2011

scholarly journals Neutron Radiography Study of Laboratory Ageing and Treatment Applications with Stone Consolidants

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 635 ◽  
Author(s):  
Matea Ban ◽  
Tim De Kock ◽  
Frédéric Ott ◽  
Germana Barone ◽  
Andreas Rohatsch ◽  
...  
Keyword(s):  
Water Absorption ◽  
Neutron Radiography ◽  
Reactive Systems ◽  
Ultrasonic Pulse Velocity ◽  
Pulse Velocity ◽  
Tetraethyl Orthosilicate ◽  
Capillary Absorption ◽  
Artificial Ageing ◽  
Nano Silica ◽  
Stone Consolidants

A nano-silica consolidant and nano-titania modified tetraethyl-orthosilicate were applied on two building stones, a carbonate and a silicate, by brush, poultice or capillary absorption. Neutron radiography was used to monitor capillary water absorption, and to analyse changes in physical properties caused by heat treatment of specimens for the purposes of artificially ageing and different treatment applications with stone consolidants. Moreover, ultrasonic pulse velocity and gravimetrically determined water absorption were analysed to cross-validate neutron radiography. The results reveal that reactive systems like tetraethyl-orthosilicates need an unknown period for polymerisation, which makes nano-silica consolidants more favourable for construction follow-up work. While polymerisation is incomplete, hydrophobic behaviour, water trapping and pore clogging are evident. Within the tetraethyl-orthosilicate treatment, poultice and brushing are strongly influenced by the applicant, which results in wide ranging amounts of water absorbed and anomalous water distributions and kinetics. The carbonate lithotype displays polymerisation initiated in the core of the specimen, while the lateral surfaces are still mostly hydrophobic. Reaction time differences can be attributed to the different amounts of consolidants applied, which is a result of the chosen application settings. Artificial ageing of stone specimens is a prerequisite when mechanical strength gain is studied, as demonstrated by sound speed propagation.

scholarly journals Internal defects and water absorption behavior of environmentally friendly brick-MAB using film neutron radiography technique

2014 ◽  
Vol 38 (1) ◽  
pp. 1-6 ◽  
Author(s):  
MK Alam ◽  
MR Islam ◽  
S Saha ◽  
MN Islam ◽  
SM Azaharul Islam
Keyword(s):  
Water Absorption ◽  
Optical Density ◽  
Neutron Radiography ◽  
Environmentally Friendly ◽  
Wave Shape ◽  
Internal Defects ◽  
Beam Port ◽  
Rapid Absorption ◽  
Academy Of Sciences ◽  
Gray Values

Film neutron radiography (NR) technique has been adopted to study the internal defects likehomogeneity, porosity, incremental intrusion area, initial rapid absorption (IRA) and water penetratingheight/behavior of the automated machine made environmentally friendly brick-MAB sample.Thermal neutron radiography facility installed at the tangential beam port of 3 MW TRIGA MARK-IIreactor was used in this study. In here optical density or gray values of the neutron radiographicimages of the sample was measured. From the measurement it was found that most of the areas of thissample were homogeneous, which indicateed the presence of a little bit internal porosity andabsorption of water to be very poor. It also showed that its initial rapid absorption was less and waterabsorption behavior was capillary and of wave shape. DOI: http://dx.doi.org/10.3329/jbas.v38i1.20197 Journal of Bangladesh Academy of Sciences, Vol. 38, No. 1, 1-6, 2014

Using neutron radiography to assess water absorption in air entrained mortar

2016 ◽  
Vol 110 ◽  
pp. 98-105 ◽  
Author(s):  
Wenting Li ◽  
Mohammad Pour-Ghaz ◽  
Pavel Trtik ◽  
Mateusz Wyrzykowski ◽  
Beat Münch ◽  
...  
Keyword(s):  
Water Absorption ◽  
Neutron Radiography
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