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Close-up of the Carlson Reinforced Concrete Meter
Close-up of the Carlson Reinforced Concrete Meter
Carlson Reinforced Concrete Meter at an Angle Close-up of the Carlson Reinforced Concrete Meter showing the detailed head of the instrument

CARLSON REINFORCED CONCRETE METER

CATEGORY > Carlson Instruments

CARLSON REINFORCED CONCRETE METER

DESCRIPTION

The Carlson Reinforced Concrete Meter is a rod-like device which simulates a bar of reinforcing steel. The rod is hollow to accommodate a miniature strain meter within, and it is this strain meter which measures the change in length from which the stress is derived. What makes the Reinforced Concrete Meter unique is that it measures the change in length of the steel rod regardless of the occurrence of fine cracking which is common to reinforced concrete. It measures the average strain over most of the rod’s length, as all of the bond between the steel rod and the concrete occurs within a few inches of each end. To insure this happening the hollow steel rod is threaded externally near each end.

The fact that the Reinforced Concrete Meter measures average length change is important when there are external cracks, because the average length change determines the stress in the reinforcing. On the other hand, if conventional strain meters of limited length were used, they would indicate a different result depending upon whether a crack is within the gauge length or just beyond it. Whenever the Reinforced Concrete Meter indicates a strain greater than the strain capacity of the concrete, it may be concluded that the concrete is cracked. In such a case, it nevertheless indicates the true stress in the steel. In the case where the tensile strain is below the strain capacity of the concrete, the Reinforced Concrete Meter indicates both the tensile stress in the reinforcing and that in the concrete. Another advantage is ease of installation. Since the sensing element is surrounded by a heavy steel wall, the device is very rugged. The usual method of installation is to wire the meter to a bar of reinforcing steel and have the cable attached to the reinforcing in such a way that when the concrete is placed, movement of the concrete will not pull on the cable.

The temperature correction can be applied simply and accurately as in all Carlson Instruments, temperature measurement is standard.

QUICK SPECS

Robust construction.


Ease of installation.


Proven Carlson design.


Integral temperature measurement.


Self temperature compensating.

APPLICATIONS

Measurement of stress in reinforced concrete.

BENEFITS

Increase Productivity


High Accuracy


High Reliability

DESCRIPTION

The Carlson Reinforced Concrete Meter is a rodlike device which simulates a bar of reinforcing steel. The rod is hollow to accommodate a miniature strain meter within, and it is this strain meter which measures the change in length from which the stress is derived. What makes the Reinforced Concrete Meter unique is that it measures the change in length of the steel rod regardless of the occurrence of fine cracking which is common to reinforced concrete. It measures the average strain over most of the rod’s length, as all of the bond between the steel rod and the concrete occurs within a few inches of each end. To insure this happening the hollow steel rod is threaded externally near each end.

The fact that the Reinforced Concrete Meter measures average length change is important when there are external cracks, because the average length change determines the stress in the reinforcing. On the other hand, if conventional strain meters of limited length were used, they would indicate a different result depending upon whether a crack is within the gauge length or just beyond it. Whenever the Reinforced Concrete Meter indicates a strain greater than the strain capacity of the concrete, it may be concluded that the concrete is cracked. In such a case, it nevertheless indicates the true stress in the steel. In the case where the tensile strain is below the strain capacity of the concrete, the Reinforced Concrete Meter indicates both the tensile stress in the reinforcing and that in the concrete. Another advantage is ease of installation. Since the sensing element is surrounded by a heavy steel wall, the device is very rugged. The usual method of installation is to wire the meter to a bar of reinforcing steel and have the cable attached to the reinforcing in such a way that when the concrete is placed, movement of the concrete will not pull on the cable.

The temperature correction can be applied simply and accurately as in all Carlson Instruments, temperature measurement is standard.

QUICK SPECS

Robust construction.


Ease of installation.


Proven Carlson design.


Integral temperature measurement.


Self temperature compensating.

APPLICATIONS

Measurement of stress in reinforced concrete.

BENEFITS

Increase Productivity


High Accuracy


High Reliability

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com

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ASK A QUESTION

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com



CONNECT WITH RST

Linkedin icon
Youtube icon

ASK A QUESTION

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