1. Quality inspection with LIBS for grey & red bathes
Sub task 3.1.3:
Quality inspection with LIBS for grey & red bathes
, Orleans, France
Lead partner:
PhD student: Han XIA
Supervisor: Maarten BAKKER
Delft University of Technology

2. Outline
Achievement of 3rd period: quality control with LIBS (T )
Laser-induced breakdown spectroscopy (LIBS) adaptive setup
Classification of clean brick, brick with adhered mortar and tile
Quantitative analysis of brick contaminated with gypsum / cement paste
Economic perspective
Cost for a onsite LIBS quality control system
Plans for next 6 months
Concrete aggregate batch (4 -16 mm) prepared for MEBIN
Brick granular fraction (> 500 mm) from VITO, (gypsum & cement)
Fragmented brick fraction from BRGM, (input & output)
Summary

3. Overview of WP3: quality control with LIBS

4. Adaptive LIBS setup
LIBS: adaptive optics design for brick and concrete aggregate quality inspection
Conveyor belt speed: 350 mm/s
(To scale up 20 times)
Sampling rate: 100 Hz
Working distance: 200 mm
Surface roughness: ± 20 mm

5. Achievement during 3rd period: brick fraction
GAIK
BRGM
VITO
TUD
quality data
Clean red brick: 15 kg
Brick + adhered mortar: 3 kg
Tile: 10 kg
Classification model done. 13

6. Brick with adhered mortar
Materials from GAIKER
Clean brick
Brick with adhered mortar
Tile

7. Classification model

8. Achievement during 3rd period: brick fraction
GAIK
BRGM
VITO
TUD
quality data
LIBS quantitative analysis on
Self-prepared powdered brick
+ gypsum / mortar (1-10 wt%,
< 250 mm) done. 13

9. Emission line selection for quantitative analysis

10. Univariate calibration curves
Direct LIBS measurement on powder without any sample preparation

11. Achievement during 3rd period: concrete aggregate
STRUK/TUD
MEBIN
quality data
TUD
150 Kg Recycled CA (4-16 mm):
Characterization of inherent
contamination level by hand-picking
ready for LIBS test 12

12. LIBS methods: classification & quantification
Categorizing new contaminants
Demolition concrete (500 Kg) ->
Concrete aggregate (150 Kg) ->
Sink-float (contamination level)
In process
Database of classified contaminants

13. Cost for onsite LIBS quality control system [€]:
Economic perspective
Cost for onsite LIBS quality control system [€]:
Laser unit:
Spectrometer: 5.000
Optics:
Software:

14. Plans for the next 6 months: brick fraction
GAIK
clean brick ~3 kg
adhered brick ~3 kg
BRGM
VITO
clean brick ~3 kg
adhered brick ~3 kg
Brick + gypsum
/ mortar
(> 500 mm) &
Mech. Str. data
TUD
Clean red brick: 15 kg
Brick + adhered mortar: 3 kg
Tile: 10 kg
Classification model done.
LIBS quantitative analysis on
self-made powdered bricks +
gypsum/mortar (1-10 wt%) done. 13

15. Plans for the next 6 months: concrete aggregate
STRUK/TUD
MEBIN
TUD
quality data
150 Kg recycled CA (4-16 mm):
Characterization of inherent
contamination level by hand-picking
ready for LIBS test
Delivery to MEBIN after LIBS test
by the end of Feb. 2016 12

16. Summary LIBS adaptive setup: working distance vs. sensitivity
Brick fraction (samples from GAIKER, for VITO) & concrete aggregate for MEBIN
Wavelength range selections: Vis. for classification, NIR for quantitative analysis
Feeding may be tricky, e.g. for tile
Cost: varying cost, e.g. feeding & transport, personnel and other maintenance

17. Thank you very much for your attention! Questions? Remarks?