Fill in (1) holes then (2) holes after delaying (Refer to Figures 1, 2, and 3)) This can be applied for controlling of a crack direction (See Bellow).
![](http://demosol.com/editor/UploadFile/200881412441701.gif)
Figure 1: Splitting of Large Boulder
d |
32-35 mm |
44-51 mm |
1 1/4-1 3/8 |
1 3/4-2 |
L |
30-40 cm |
60-90 cm |
1’-1’4 |
2’-3’ |
D |
70% of Height |
![](http://demosol.com/editor/UploadFile/200881413227892.gif)
Figure 2: Trenching and tunneling of Rock
d |
38-51 mm |
1 1/2-2 |
L |
30-60 cm |
1’-2’ |
D |
1-1.8 m |
3’-6’ |
![](file:///D|/sites/demosol_posuiji/clip_image001_0004.gif)
|
45°-60° |
Reliever holes are necessary when trench is deep |
![](http://demosol.com/editor/UploadFile/200881413845728.gif) |
Figure 3: Mass Concrete
|
Concrete |
reinforced Concrete |
d |
38-51 mm |
38-44 mm |
1 1/2-2 |
1 1/2-1 3/4 |
L |
50-90 cm |
40-60 cm |
1’8-3’ |
1’4-2’ | ![](http://demosol.com/editor/UploadFile/2008814131825762.gif) |