Standard: ASTM C1170, ASTM C1176
Vebe Consistometer (ASTM)
Vebe Consistometer (ASTM) is used to measure the consistency and density of roller-compacted concrete, which determines the ease with which concrete can be transported, placed, and compacted. The test involves placing a sample of freshly mixed concrete in a cylindrical container and subjecting it to vibration using the Vebe Consistometer apparatus. The time taken for the concrete to undergo a certain degree of deformation under the influence of vibration is measured and used as an indicator of its consistency.
The test can be performed on both laboratory and field-prepared freshly mixed concrete with a maximum aggregate size of 22” (50mm) or less. In addition to roller compacted concrete, the device can be on cement treated, aggregates & soil cement type mixer. Meets ASTM C1170 Test Method for consistency and density determinations of roller-compacted concrete. Can be used on both laboratory and filed-prepared mixes.
Features of Vebe Consistometer (ASTM)
- Measurement of Level of Workability and Consistency: The device measures the time taken for the concrete sample to undergo a specific degree of deformation under vibration. This measurement provides a quick indication of the consistency and workability of fresh concrete.
- Wide Aggregate Test Size: It can handle concrete mixes with a maximum aggregate size of up to 2 inches (50mm), accommodating a variety of mix designs commonly used in construction projects.
Technical Specifications
| Model Number |
NL 4005 X / 002 |
| Dimension (mm) |
480 (L) x 430 (W) x 880 (H) |
| Desk Area (mm) |
380 (L) x 250(W) |
| Amplitude (mm) |
0.43 ± 0.08 |
| Cylindrical Mould (mm) |
Ø240 x 200 (H) |
| Approx. Weight |
110 kg |
| Power |
220 V, 50 / 60 Hz, 1 ph |
Unit Consists Of:
| Model Number |
Parts Description |
| NL 4005 X / 002 – P 001 |
Cylindrical Mould |
| NL 4005 X / 002 – P 002 |
Swivel Arm c/w Sliding Weight (22.7kg/50 lbs) (ASTM C1170 Method A) |
| NL 4005 X / 002 - P 004 |
Foot Switch |
| NL 7031 X / 001 |
Stop Watch |
| NL 4013 X / 001 – P 003 |
Tamping Rod |
*1 Copy of Manual Instruction
Optional Accessories
| Model Number |
Parts Description |
| NL 4005 X / 002 – A 001 |
Sliding Weight (12.5 kg/27.5 lbs) ( ASTM C1170 Method B ) |
| NL 4005 X / 002 – A 002 |
Sliding Weight (9.1 kg/20 lbs) (ASTM C1176) |
| NL 4014 X / 015 |
Ø 150 x 300 mm Mild Steel Cylinder Mould |
Standards
- ASTM C1170: Standard Test Method for Determining Consistency and Density of Roller-Compacted Concrete Using a Vibrating Table: This standard specifies the procedure for determining the consistency and density of roller-compacted concrete (RCC) using a vibrating table. It outlines the apparatus, sampling, specimen preparation, testing procedure, and calculation methods required to assess the workability and density of RCC mixes.
- ASTM C1176: Standard Practice for Making Roller-Compacted Concrete in Cylinder Molds Using a Vibrating Table: This standard provides guidelines for the preparation of roller-compacted concrete (RCC) specimens in cylinder molds using a vibrating table. It details the procedure for mixing, molding, compacting, curing, and testing RCC specimens to ensure consistency and reliability in laboratory testing.
Test Procedure of Vebe Consistometer (ASTM)
- Equipment Check: Ensure that the Vebe Consistometer apparatus is in good working condition and properly calibrated.
- Sample Preparation: Prepare a representative sample of fresh concrete according to the project specifications.
- Vebe Table Setup: Set up the Vebe table with the appropriate mould, ensuring it is clean and free from any residues.
- Sample Placement: Place the fresh concrete sample into the mould on the Vebe table.
- Initial Measurement: Set the timer and start the Vebe table. Record the time it takes for the concrete to reach a specified level of consistency.
- Recording Vebe Time: Record the Vebe time, which represents the time taken for the concrete to undergo a specified amount of vertical movement.
- Repeat Testing: Conduct multiple tests with fresh samples to ensure consistency and reliability of results.
- Data Analysis: Analyse the Vebe time data to assess the workability of the concrete. Shorter Vebe times typically indicate higher workability.
- Comparisons with Standards: Compare the obtained Vebe time with project specifications or industry standards to ensure the concrete meets the required workability criteria.
- Documentation: Document the test results, including the Vebe time, any observations, and details of the concrete mix.
- Clean-Up: Clean the Vebe table and mould thoroughly between tests to prevent any residue from affecting subsequent measurements.
