Improve your Concrete Test Method

Existing Concrete Tests

Terms used in the implementation of the assignment based on the calculation procedure of Concrete Structures for Buildings / Tata cara Penghitungan Struktur Beton untuk Bangunan gedung (TCPS-BBG), SNI 03-2847, 1992.

1. Loading Test

Loading procedure

1. Initial reading of deflection, prior to loading implementation.
2. The amount of total load, including dead load has worked, is equivalent with 0.85 (1.2 DL + 1.0 LL).
3. Loading test is conducted shall not be less than 4 loading stages (load as much). The deflection shall be measured in every stage.
4. Read the deflection after 24 hours loading thereafter remove the load and measure the deflection.
5. Read the deflection 24 hours after the load was removed.

The structure adequate the technical requirements when:

1. Measured maximum deflection for ebam, slab and/or roof is less than L/20000 h.
2. If the deflection is more than L/20000 h, measured deflection after 24 hours load test is removed is at least 75% of maximum deflection for normal concrete or 80% for precast.
3. Retest for failure normal concrete can be conducted at least 72 hours after the load test is removed.

The tested structure adequate technical requirements if:

1. Retested structure is free from failure indication visually.
2. Recover deflection in the second test shall be at least 80% of maximum deflection.

2. Convermeter Test

The purpose is to identify the diameter, distance and quality of the reinforcement including concrete cover. This test is conducted with radiograph method that can identify the reinforcement condition directly and give the information of the reinforcement to identify reinforcement quality.

3. Corrosion Test

To identify corrosion rate of reinforcement. This test is conducted with supplying small electricity to the reinforcement in the large crack concrete area to identify the rate of corrosion with electricity potential difference.

4. Vibration Test

To identify Load Bearing of the tested structure including mode shapes values and natural frequency with damping factors. Vibration is given from ultra dynamic vibrator with sweap generator 5-1000 Hz that is connected with amplifier. Measurement is recorded by triaxial accelerometer or velocity transducer that is installed on that location.
Another advantage of this instrument is can identify Pile head stiffness, pile length, area of pile section, level of discontinuitas, possible range of stiffness from ground/pile conditions.

5. Shock Test

Purposes:

1. Identify the stiffness of beam and column and the integrity of beam and column.
2. Identify stiffness of pile head, length and section area of the pile.
3. Identify end of pile condition whether there is necking in the cast in situ pile or no.

Method:

1. Elastic pulse is given by 1 kg hammer punching to the tested structure.
2. Load transducer will receive the wave impact.
3. The signal from transducer ais saved in the micro computer.

Shock Test Instruments and tools:

1. Z-80A Zilog micro computer
2. Converter
3. Conditioning Electronics
4. Sensonic Vibration Transducer
5. Load Cell/Integral Torsional Accelerometer
6. Hammer 1 kg
7. Connecting Cable
8. Recording Device T-912
9. Tectronic scope with Ocilloscope camera Co. 212

This link below is only for your information. No advertisement purposed.....
http://www.mradcorp.com/prod_shocktesting.html
hopefully this link is usefull to little bit understanding about shocking test equipment.

So sorry for can't give you the instruments related with this tests in detail. Maybe someday I'll provide it including the estimation prices.

Have a nice Keeping Improve your Things....!!!