Dry Coring and Dry Wire Sawing in Reinforced Concrete
Dry Coring and Dry Wire Sawing in Reinforced Concrete
Dry Coring and Dry Wire Sawing in Reinforced Concrete
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Polycrystall<strong>in</strong>e Diamond PCD for <strong>Dry</strong> Drill<strong>in</strong>g<br />
PCD carrier<br />
Cutt<strong>in</strong>g<br />
Re<strong>in</strong>forced concrete<br />
¼<strong>in</strong>ch<br />
Cutt<strong>in</strong>g direction<br />
¼<strong>in</strong>ch<br />
• Process with high efficiency<br />
• Primarily cutt<strong>in</strong>g<br />
coarse debris produced<br />
• Air cool<strong>in</strong>g feasible<br />
1 mm<br />
PCD cutt<strong>in</strong>g – Effect on Gra<strong>in</strong> Size of Debris<br />
Share <strong>in</strong> volume [%]<br />
12<br />
10<br />
8<br />
6<br />
4<br />
PCD<br />
Diamond Segment<br />
2<br />
0<br />
1 10 100 1000<br />
Gra<strong>in</strong> size [µm]<br />
• Coarse debris can be removed easily<br />
• Energetically favorable process<br />
• Coarse debris facilitates dust collection<br />
www.hilti.com<br />
IACDS Bauma 2010 sem<strong>in</strong>ar | ZH-Goedickemeier | 2010-04 5<br />
www.hilti.com<br />
IACDS Bauma 2010 sem<strong>in</strong>ar | ZH-Goedickemeier | 2010-04 6<br />
Energetic Considerations<br />
Geometrically Def<strong>in</strong>ed Cutters<br />
Diamond impregnated<br />
segments – wet<br />
PCD cutter – dry<br />
W 0 = 1900 J/mm 3 W 0 = 380 J/mm 3<br />
W heat = 1600 J/mm 3<br />
W heat = 330 J/mm 3<br />
Fracture energy<br />
Plastic<br />
deformation<br />
Plastic<br />
deformation<br />
Fracture energy<br />
5x higher efficiency with PCD<br />
Basic experiments – lathe test on re<strong>in</strong>forced concrete<br />
www.hilti.com<br />
IACDS Bauma 2010 sem<strong>in</strong>ar | ZH-Goedickemeier | 2010-04 7<br />
www.hilti.com<br />
IACDS Bauma 2010 sem<strong>in</strong>ar | ZH-Goedickemeier | 2010-04 8<br />
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