3D void distribution in concrete
5
3D void distribution in concrete 2011 Spring, EPS207, Juhyuk Moon Background: Objective: Effects of curing temperature & ASR(alkali-silica reaction) on void distribution Method: Micro-Tomography Construct 3D void map using Matlab Solution! Problem! http:// www.ce.berkeley.edu/ ~paulmont/
description
Background: Objective: Effects of curing temperature & ASR(alkali-silica reaction) on void distribution Method: Micro-Tomography Construct 3D void map using Matlab. 3D void distribution in concrete. http://www.ce.berkeley.edu/~paulmont/. Problem!. Solution!. - PowerPoint PPT Presentation
Transcript of 3D void distribution in concrete
3D void distribution in concrete2011 Spring, EPS207, Juhyuk Moon
Background:
Objective:Effects of curing temperature &ASR(alkali-silica reaction) on void distribution
Method:Micro-TomographyConstruct 3D void map using Matlab
Solution!Problem!http://www.ce.berkeley.edu/
~paulmont/
original image
1st image of 500 stacking imagesoriginal image
Matrix
Original :2075 by 2075 PixelsResize to 500 by 500 PixelsScale: 1pixel = 0.0087 mm Void
Aggregate
18 mm
4.35 mm
0.87 mm
original image bw, im2bw S, median smoothing erode after smoothed
close after erode open after closeclose after open VM, void map
Void segmentation
<void map, larger than 100 pixels>
<bw, 0.46 thresh> <median smoothing w/ size 2>
<erode w/ radius 1><original image>
<close w/ radius 2> <open w/ radius 2> <close w/ radius 5>
0 100 200 300 400 500 6000
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
void number
void
vol
ume
(mm
3 )
3D-Reconstruction of void
85°C curing + ASR
85°C curing
20°C curing
0 500 1000 1500 20000
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
void numbervo
id v
olum
e (m
m3 )
0 200 400 600 800 1000 1200 14000
0.1
0.2
0.3
0.4
0.5
0.6
0.7
void number
void
vol
ume
(mm
3 )
10-4 10-3 10-20
50
100
150
200
250
300
log(void volume,(mm3))
num
ber o
f voi
ds
85`C
85`C+ASR
20`C
3D Void distribution
original image
A
BA
B
4.35 mm
