Multiquip CV1A, CV3A/3B manual General information, Consolidation, Vibration time, Vibration range

Multiquip's CV Series Vibrator Motors are designed to work with flex shafts and vibrator heads for consolidation of fresh concrete to ensure optimum strength and durability. See Table 2 for the required shafts for the different vibrator motor models.

These vibrator motors have large vibration-isolated handles to protect the motor and the operator. They have a quick- disconnect knob for easy shaft removal.

The cassette-style motor improves durability and performance by minimizing friction and enabling the motor to maintain optimum RPM.

The flow-through ventilation feature of these motors reduces contamination by taking in air from the rear of the motor.

FLEXIBLE SHAFTS

Multiquip's flex-shafts vibrator heads are designed to work in medium to high slump concrete. Typical applications include small pours, slabs, driveways, stem walls and footings.

Typical shaft lengths range from 2 to 21 feet (0.6 to 6.4 meters). See Table 6 for recommended shaft lengths.

Steel heads, attached to one end of the flex-shaft, generate vibration via an eccentric rotator that consolidates the concrete by removing air pockets. The round head design allows for the transmission of vibration in all directions.

There are 7 different steel head sizes that range from 7/8 to 25/8 inches in diameter. Typical vibration frequency for these vibrating heads range from 9,200 to 12,150 VPM with 1-inch slump when using electric motors.

Consolidation

Consolidation eliminates pockets of air bubbles maximizing strength and eliminating voids. Vibrators consolidate concrete by transmitting shock waves which allow the aggregate to float freely while pushing lighter trapped air up and out of the concrete mix.

A properly consolidated concrete pour will display a thin line of mortar appearing along the form near the vibrator and the coarse aggregate has been dispersed evenly throughout the pour and is not visible.

vibration time

Vibration time depends on frequency. The higher the frequency, the less vibration time is required for the job.

vibration range

Vibration range (Figure 2) can be defined as "Area of Influence". This area of influence (vibrating radius) is the distance from the center of the vibrator to the outer most edge.

AREA OF INFLUENCE (VIBRATING RADIUS)

R

D

VIBRATOR HEAD

INSERTION SPACING

Figure 2. Vibrator Radius/Spacing

Table 4 shows the vibration radius and spacing for a given vibrator head diameter.

Table 4. Vibrating Radius/Insertion Spacing

NOTICE

Radius (area of influence R) and vibrator head spacing (D) are expressed in inches/millimeters. Radius and distance values expressed in Table 4 are only to be used as a general guide.Values are subject to change.