Experimental investigation on the microstructure of fluidized nanoparticle agglomerates by TEM image analysis

2020 ◽  
Author(s):  
Shaowei Wang ◽  
Huanpeng Liu ◽  
Chenyu Yang ◽  
Yang Li
Keyword(s):  
Experimental Investigation ◽  
Image Analysis ◽  
Nanoparticle Agglomerates

Non-aqueous phase liquids distribution in three-fluid phase systems in double-porosity soil media: Experimental investigation using image analysis

2018 ◽  
Vol 7 ◽  
pp. 133-142 ◽  
Author(s):  
Motasem Y.D. Alazaiza ◽  
Su Kong Ngien ◽  
Mustafa M. Bob ◽  
Samira A. Kamaruddin ◽  
Wan Mohd Faizal Ishak
Keyword(s):  
Experimental Investigation ◽  
Image Analysis ◽  
Aqueous Phase ◽  
Fluid Phase ◽  
Double Porosity ◽  
Soil Media ◽  
Phase Systems

REDUCING BUG-HOLES ON TUNNEL LINING CONCRETE BY USING COVERING SHEETS

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Sari Harada ◽  
Tomoyuki Maeda ◽  
Masayuki Hirano ◽  
Isamu Yoshitake
Keyword(s):  
Experimental Investigation ◽  
Image Analysis ◽  
Concrete Surface ◽  
Tunnel Lining ◽  
Coated Steel ◽  
Test Results ◽  
Sheet Materials ◽  
Tunneling Method ◽  
Experimental Parameters ◽  
Entrapped Air

This study focused on bug-holes on sidewalls of tunnel lining concrete. The bug-holes of lining concrete may negatively affect aesthetics and durability of NATM (New Austrian Tunneling Method) tunnels. Most bug-holes appeared on concrete surface are generated from entrapped air during consolidating concrete. In particular, the sidewall of tunnel lining is constructed with negative angles, so bug-holes are often observed on the sidewall. Seven concrete specimens were prepared to simulate conventional tunnel lining. In the experimental investigation, breathable-waterproof material sheets and permeable sheets were used. The primary experimental parameters are (a) covering-sheet materials and (b) form surfaces such as ceramic-coated steel with grooves. The study examined bug-hole distributions in the concrete specimens using the various sheets. The bug-hole distributions were quantified by using an image analysis developed in this study. The test results show that quantity of bug-holes of concrete using the sheets is lower than the quantity of concrete without sheets. It was noteworthy that the bug-holes were hardly observed in the test using the form covered with the permeable sheets.

scholarly journals Experimental Investigation of the Variation of Concrete Pores under the Action of Freeze-Thaw Cycles by Using X-Ray CT

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Jie Yuan ◽  
Yang Liu ◽  
Hongxia Li ◽  
Baokun Zhang
Keyword(s):  
Experimental Investigation ◽  
Image Analysis ◽  
Failure Process ◽  
Statistical Characteristics ◽  
Freezing And Thawing ◽  
X Ray ◽  
Freeze Thaw ◽  
Complete Disintegration ◽  
Repeated Freezing ◽  
Extent Of Damage

The variation of concrete pores under the action of freeze-thaw cycles was investigated experimentally by using the X-ray CT. Firstly, the statistical characteristics of pores of concrete specimens were obtained by using the X-ray image analysis. Secondly, the variation of porosity and pore volume of concrete pores were analyzed and discussed by comparing with above characteristics. Thirdly, the failure process of the concrete specimens acted by the freeze-thaw cycles was investigated by scanning the interior of concrete specimens. The results showed that the pore volumes of concrete pores whose volumes were located at the interval [0.5 mm3, 20 mm3] have no big variation in both the amounts and volume of concrete pores, while others were found to have huge change during the process of experiment. The extent of damage acted by the repeated freezing and thawing gradually ranged from surface to complete disintegration of the interior of concrete specimens after 30 cycles of freeze-thaw acting.

EXPERIMENTAL INVESTIGATION OF SLUGGING USING IMAGE ANALYSIS

1994 ◽  
Vol 12 (1) ◽  
pp. 13-20 ◽  
Author(s):  
D. L. McKAIN ◽  
N. N. CLARK ◽  
G. GANSER
Keyword(s):  
Experimental Investigation ◽  
Image Analysis
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