The Non-Contact Concrete Shrinkage and Expansion Deformation Tester is designed to measure shrinkage and expansion of early-age concrete. It can also be used to determine the shrinkage and expansion deformation of concrete under unrestrained conditions. The instrument uses eddy-current displacement sensors to measure the movement of targets embedded in concrete. Its high-precision processor accurately measures and processes early-age concrete deformation data, enabling reliable monitoring of changes in specimen dimensions over time.

Non-Contact Concrete Shrinkage Deformation Tester

Model: TD575-2

I. Product Overview

The tester features a 7-inch full-color touchscreen for convenient operation and a user-friendly interface. Its data analysis software supports bidirectional data analysis, while the measuring fixture features a scientifically designed structure and precision manufacturing to support reliable testing.

The instrument is suitable for scientific research institutions, quality control laboratories, and other organizations involved in concrete testing and construction materials research.

Reference or Applicable Standards: GB/T 50082-2009, ASTM C157/C157M-24e1, ISO 1920-8:2009, ASTM C1698-19.

II. Product Features

1. Large, true-color touchscreen with a user-friendly interface.

2. Automatic data recovery after power failure; no data loss.

3. Resumption of operation and data recovery upon power restoration.

4. Simultaneous display of real-time temperature and humidity values, as well as shrinkage data (via both graphs and tables).

5. Test data export via USB flash drive.

6. PC analysis software featuring dual display (graphs and tables) and historical data retrieval.

7. Exported Excel files allow for the direct generation of graphs.

III. Technical Specifications

1. Data storage capacity: 8 GB (based on the SD card included with the main unit); expandable to 32 GB;

2. Number of test channels: 24;

3. Displacement measurement range: 3.0 mm;

4. Accuracy: <2 μm;

5. Minimum detection time interval: 1 minute;

6. Imported Ambient Temperature and Humidity Sensor: Temperature accuracy: ±0.5°C; humidity accuracy: ±4.5% RH.

7. Color Touchscreen: 8-inch display, 800 × 600 pixels.

8. Power Supply: AC 220 V, 50 Hz.

9. Operating Temperature: 0°C to +50°C.

10. USB Flash Drive: 8 GB.

IV. Standard Configuration

- Main Unit of the Concrete Shrinkage Deformation Tester

- Measurement Sensors: 24 pcs

- Sensor Mounting Fixtures: 24 sets

- Target Markers: 24 sets

- Data Analysis Software: 1 set

- USB Flash Drive: 1 pc

V. Working Principle

The Non-Contact Concrete Shrinkage Deformation Tester measures early-age concrete deformation using eddy-current displacement sensors and target markers embedded in the specimen. As the concrete shrinks or expands during setting and hardening, the relative displacement between the targets and sensors changes.

The sensors convert these displacement changes into electrical signals, which are processed by the instrument's high-precision measurement system. The resulting data are recorded and displayed as numerical values, graphs, and historical records, allowing users to monitor concrete shrinkage and expansion over time.

The non-contact measurement principle minimizes mechanical interference with the measurement targets, making the instrument suitable for investigating early-age concrete deformation under specified testing conditions.

VI. Applications

The Non-Contact Concrete Shrinkage Deformation Tester is suitable for research laboratories, construction materials testing centers, universities, and quality control institutions.

Typical applications include:

Early-Age Concrete Shrinkage Testing: Monitoring dimensional changes during the initial setting and hardening stages.

Concrete Expansion Measurement: Investigating expansion behavior under specified material and curing conditions.

Autogenous Shrinkage Research: Studying deformation associated with cement hydration and internal moisture changes.

Concrete Mix Design Research: Comparing the deformation characteristics of different concrete mixtures and cementitious materials.

Durability and Cracking Research: Investigating the relationship between early-age deformation, restrained shrinkage, and potential cracking.

Construction Materials Quality Control: Collecting quantitative data to support material evaluation and comparative testing.

The suitability of each application depends on the specimen configuration, test procedure, and measurement arrangement.