SVA-SERIES — OPERATION
SVA SeriesVibrator Motor Familiarization
This VIBRATOR MOTOR is designed for the compaction of concrete by removal of air pockets and voids.
The action of vibration is to set the particles in the fresh concrete in motion, thereby reducing the friction between the particles and giving the mixture the mobile quality of a thick fluid so gravity and the displacement of entrapped air will cause it to settle easily into place.
By consolidating the concrete quickly, "stiffer" or "drier" mixes can be poured than would otherwise be possible. It has been proven that (up to a point) the drier the concrete, (that is, the less water in it), the better the quality throughout and the greater the strength.
Drier mixes also make the concrete more water tight, increase resistance to weathering, and create a better bond between concrete and reinforcement. Because vibration causes much of the entrapped air in the concrete to rise to the surface, honeycombing is prevented. Vibration also eliminates most of the air pockets between the concrete and the vertical forms.
SVA-SERIESVIBRATOR MOTOR OPERATION
Read all the safety instructions carefully. Safety instructions will be found throughout this manual and on theVibrator Motor. Keep all safety information in good, readable condition.
1.Make certain that the flexible shaft is properly attached to the motor and the head to the flexible shaft.
2.Use the flexible shaft in as straight a position as possible.
3.DO NOT bend the flexible shaft sharply at any point. Sharp bends may cause a permanent kink, requiring early replacement of the flexible shaft.
4.With the vibrator motor properly plugged into the correct power source, turn the ON/OFF switch to the "ON" position and proceed to insert the vibrator into the concrete.
5.The concrete is normally placed in the forms in layers about 12 to 18 inches thick in a manner which forms a fairly level surface.The vibrator head is inserted vertically into the top of the pile.
6.DO NOT insert the head into the side of the pile to make the concrete flow as this practice can cause segregation of the aggregate from the mortar.When the surface has become fairly level, the head the should be immersed and generally moved in the pattern shown in Figure 5.
| Figure 5. Compaction Coverage |
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| with 50% Radial Overlap |
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| Table 4. Compaction Coverage |
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Head | 900 | 1000 | 1300 | 1400 | 1700 |
| 2100 | 2600 |
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4" | 8" | 8" | 12" |
| 14" | 18" | ||
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7.Immerse the head for 5 to 10 seconds, (until air stops rising), and then withdraw it slowly to let the concrete fill the void left by the head.
8.The head shoud be completely below the surface when vibrating to keep the head cool.
9.When vibrating a thin horizontal slab, the head can be used in a horizontal position.
