3. The use of DustBubble
As shown in Fig. 1, according to the guidelines provided by
DustBubble Ltd. (2011), there are four simple steps to use a
DustBubble:
– Step 1: Rub the DustBubble between your fingers to loosen up
the plastic, remove the backing tape and stick to the wall.
– Step 2: Pull the label to inflate the DustBubble.
– Step 3: Push the drill bit through the crosshairs on the label and
drill, keeping the drill spinning on withdrawal.
– Step 4: Insert a wall plug through the DustBubble to seal the
hold. To remove, wrap your fingers around the DustBubble
and pinch carefully towards the hole.
During the comparative experimental study, the following two
situations were compared: (a) drilling concrete using electric ro-
tary hammers with DustBubbles, and (b) drilling concrete using
electric rotary hammers without DustBubbles. The worker using
DustBubble were asked to follow the above four steps to conduct
the drilling process.