Consolidation Apparatus
NL 5044 X / 001

Standard: BS 1377-5, ASTM D2435, AASHTO T216

Consolidation Apparatus

The Consolidation Apparatus is used to determine the consolidation characteristics of soil samples, measuring how soil settles and consolidates under load over time. Consolidation refers to the process by which soil gradually settles under stress, typically due to the application of a load or due to natural processes. 

The Consolidation Apparatus applies controlled pressure to soil samples, within a permeable membrane, while measuring the resulting settlement over time. This data helps understand how soil will behave under different loading conditions, which is essential for designing structures such as buildings, roads, and dams.

NL Scientific Consolidation Apparatus is designed to provide reliable results from a compact unit without sacrificing accuracy and repeatability. It comes with a triple beam ratio and a compact design ensures space saving.

Data Acquisition Unit in Consolidation Apparatus

1. Consist of 8 Channels, the test can be run at once.
2. Display live streaming graph plotting of Displacement vs Time.
3. The final graph can be saved in the Paint App.
4. Raw data collection is stored automatically in D drive.

Features of Consolidation Apparatus

• Triple Beam Ratio: This feature likely refers to the apparatus having three beams for applying pressure to the soil sample, allowing for precise control and measurement of the applied load.
• Compact Design: The apparatus is designed to be space-saving, making it suitable for laboratory environments where space may be limited.
• Real-time Graph Plotting: The data acquisition unit provides a real-time display of displacement versus time, allowing researchers to monitor the consolidation process as it occurs.
• Graph Image Saving: The pre-installed software enables users to save graph images, facilitating record-keeping and analysis of the consolidation test results.
• Automatic Raw Data Collection: The apparatus automatically saves raw data, ensuring that no important information is lost during the testing process.
• Support for Multiple Deformation Gauges: The apparatus can accommodate up to 8 channels of deformation gauge simultaneously, allowing for comprehensive testing and data collection.

Technical Specifications

Set Consists Of:

Optional Accessories

Standards

• BS 1377-5: This is a British Standard titled "Methods of test for soils for civil engineering purposes - Part 5: Compressibility, permeability and durability tests." It outlines procedures for determining the compressibility, permeability, and durability of soils, which are crucial properties for assessing soil behavior in civil engineering projects.
• ASTM D2435: This is an ASTM International standard titled "Standard Test Methods for One-Dimensional Consolidation Properties of Soils Using Incremental Loading." It provides procedures for determining the consolidation properties of soils under incremental loading, which is important for understanding how soils settle under applied loads.
• AASHTO T216: This is a standard test method published by the American Association of State Highway and Transportation Officials (AASHTO) titled "Standard Method of Test for Determining Consolidation Characteristics of Soils Using a Constant Rate of Strain." It specifies procedures for determining the consolidation characteristics of soils using a constant rate of strain, which is another important aspect of soil behavior for road and transportation infrastructure projects.

Test Procedure of Consolidation Apparatus

1. Sample Preparation: Prepare the sample to the required dimensions and moisture content according to the testing standard or project specifications.
2. Sample Installation: Place the soil sample in the consolidation cell of the apparatus. Ensure proper sealing to prevent leakage of water during the test.
3. Saturation: Saturation is often required for cohesive soils. Apply water to saturate the soil sample by allowing it to absorb water through the base or top of the sample.
4. Consolidation Stage: Apply a predetermined load or pressure incrementally to the soil sample using the loading device of the apparatus. Record the applied load and corresponding time intervals.
5. Settlement Measurement: Use dial gauges, LVDTs (Linear Variable Differential Transformers), or other displacement measuring devices to measure settlement accurately.
6. Data Collection: Record the settlement data along with the corresponding applied loads or pressures. Plot a consolidation curve showing the relationship between settlement and time or pressure.
7. Consolidation Analysis: Analyse the consolidation curve to determine the consolidation parameters, including coefficient of consolidation (Cv) and coefficient of volume change (mv). Interpret the results to understand the compressibility and consolidation characteristics of the soil.
8. Reporting: Prepare a comprehensive report summarising the test procedure, soil properties, and test results.