19-Jun-2013
20:45:21 IST
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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.18 [2011] >
IJEMS Vol.18(6) [December 2011] >
| Title: | Characterization of fiber distribution in steel fiber reinforced cementitious composites with low water-binder ratio |
| Authors: | Liu, Jiaping
Li, Changfeng
Liu, Jianzhong
Du, Zhaojin
Cui, Gong |
| Keywords: | Image Analysis
Steel Fiber
Dispersion Coefficient
Orientation Factor |
| Issue Date: | Dec-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Image
analysis technique is introduced to characterize fiber distribution in steel
fiber reinforced cementitious composites. Through cutting and polishing of specimen,
image acquisition of specimen surface, extraction of fiber feature, and measurement of related fiber parameters, i.e., dispersion coefficient and orientation
factor, are given to quantitatively analyze fiber distribution. Effects of specimen
size, fiber volume fraction and aggregate characteristics on fiber distribution
are discussed. Results
show that the dispersion coefficient increases with the increase of specimen
size and with the decrease of fiber volume fraction and aggregate size, but the
changes are small. The orientation factor of fiber is affected by boundary
effect, while the influence will get smaller and smaller with the increase of
specimen size, especially for the specimen size larger than 50 mm. With the increase of
fiber volume fraction, the orientation factor in each direction deviates from 0.5, and the orientation factor in
y-direction decreases. Aggregate characteristics have a significant effect on
fiber distribution, with the increase of aggregate size, the orientation factors
in x- and y- directions increases, while that in z-direction decreases. With
the increase of aggregate content, the orientation factors in y- and z-directions
increase, while that in x-direction decreases. |
| Page(s): | 449-457 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.18(6) [December 2011]
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