LBHP-4.0 Intelligent Self-Sealing Concrete Impermeability Tester

Product Introduction

The intelligent self-sealing concrete permeability tester is designed and manufactured in accordance with national standards and industry safety regulations, including JG/T 249-2009 “Concrete Permeability Tester” and GB/T 50082-2024 “Standard Methods for Testing Long-Term Performance and Durability of Concrete.” This instrument is suitable for conducting tests on concrete based on its impermeability grade, water penetration height, and relative permeability coefficient.

Key Features

High efficiency: Six sets of 36 specimens can operate simultaneously, with each set completely independent of the others.

Space-saving: Featuring a compact, bookshelf-style design that accommodates the majority of laboratory space requirements. Loading and unloading test blocks is faster and more convenient.

New sealing method: Utilizing the latest sealing technology, the sealing area extends beyond the test specimen, eliminating the need for a sealing ring at the base.

Excellent safety: Higher safety standards, with a mechanical locking mechanism. In the event of a power outage, the mold automatically stops at its current position, preventing any downward movement that could pose a safety hazard. Requires only a standard 220V household power supply.

Smart Networking: Equipped with internet upload functionality, eliminating the need for post‑installation upgrades.

Low Loss: The sealing components that customers care about most exhibit very low loss, as demonstrated by testing under proper operating and maintenance conditions.

Reference standard:

JG/T 249-2009 “Concrete Impermeability Tester”

GB/T 50082-2024 “Standard for Test Methods of Long-Term Performance and Durability of Concrete”

Technical Specifications:

Test method

1 Test Conditions

Ambient temperature: The impermeability testing apparatus shall be operated at a water temperature and ambient temperature ranging from 4°C to 40°C, with relative humidity not exceeding 85%, protected from rain and water immersion, and free from strong vibrations.

Use under vibrating conditions.

The supply voltage shall be AC 220 V ± 22 V; the frequency shall be 50 Hz ± 0.5 Hz.

2 Sample Preparation

Each test group consists of six specimens. When the specimens are compacted by manual tamping, the concrete mixture is placed in two layers, with 25 tamping strokes per layer, under standard curing conditions.

Curing, when required by the project, shall be carried out at the place of placement. For each unit project, at least two sets of test specimens shall be prepared, with at least one set cured under standard conditions.

Curing: The remaining specimens and components shall be cured under the same conditions. The curing period for the test cubes shall be no less than 28 days and no more than 90 days.

After 24 hours of specimen curing, remove the mold and use a wire brush to thoroughly clean the cement paste film from both end faces. The standard curing period is 28 days.

3 Water Infiltration Height Method

1 This method is applicable to the determination of the water impermeability of hardened concrete, expressed as the average water penetration height under a constant water pressure.

2. The water pressure range of the impermeability testing apparatus shall be (0.1 to 1.2) MPa.

3 The mold shall be a frustum of a cone with an upper internal diameter of 175 mm, a lower internal diameter of 185 mm, and a height of 150 mm.

4. The sealing material employs a rubber sleeve as the sealing structure.

5 The trapezoidal board shall be made of a transparent material measuring 200 mm × 200 mm and shall be marked with ten equally spaced straight lines perpendicular to the trapezoid’s base.

Line.

6. The water penetration resistance test shall be conducted according to the following steps:

6.1 Specimens shall be fabricated and cured in accordance with the procedures specified in Section 2 of this specification, and the water permeability test shall be conducted on groups of six specimens.

6.2 After formwork removal, the cement paste film on both end faces shall be brushed off with a wire brush, and the specimens shall be promptly transferred to a standard curing room for curing.

6.3 The age for the water‑penetration resistance test is 28 days. One day prior to reaching the test age, the specimens shall be removed from the curing chamber and thoroughly wiped clean.

Allow the specimen surface to dry. Place the specimen in the mold sleeve of the permeability testing apparatus, and seal the specimen by pressurizing it with water injected into the airbag.

6.4 After the specimen is prepared, start the permeability testing apparatus; the operation screen will turn on and display the operating interface, as shown in Figure 1.

Smart Concrete Permeability Tester Operating Interface

6.5 On the operation interface, select and click the “Parameter Settings” button to enter the parameter settings screen, as shown in Figure 2. On this screen, enter the required test data according to the number of test layers. Once completed, return to the smart concrete permeability tester’s operation interface.

Parameter Settings Interface

6.6 On the operator interface, select the desired instrument test layer and click the corresponding “Open Mold” button. After clicking the “Open Mold” button, the self-locking mechanism of the permeability tester’s cover will disengage, opening the mold; place a set of six concrete specimens, one in each of the six molds.

6.7 On the operation interface, select the desired instrument test layer and click the corresponding “Close Mold” button. After clicking the “Close Mold” button, the mold clamp on the permeability tester’s cover will engage, and the self-locking mechanism will close and lock in place.

6.8 After the specimen is properly installed, select the desired instrument test layer on the operation interface and click the corresponding “New Test” button to enter the new test interface, as shown in the figure below.

6.9 After completing the form, return to the Smart Concrete Permeability Tester’s operation interface. On this interface, select the desired test chamber and click the corresponding “Start Test” button. The tester will automatically perform the sealing‑bag pressurization and sealing procedure, as well as the pressurized water‑injection phase of the permeability test. During the pressurized water‑injection step, the system will automatically open the six valves corresponding to the selected test chambers, maintaining a constant water pressure of (1.2 ± 0.05) MPa for 24 hours. The pressurization process must not exceed 5 minutes. The specimen that reaches stable pressure first shall be taken as the starting point for recording the test duration. Throughout the stabilization period, continuously monitor the water seepage at the specimen’s end face; if any specimen exhibits seepage, immediately stop testing that specimen, record the time, and proceed with…

The height of water penetration is taken as the measured penetration depth for the specimen. If no water penetration is observed on the specimen’s end face, the test shall be terminated after 24 hours, and the specimen shall be removed promptly. Should water be found to have leaked along the specimen’s perimeter during the test, the sealing procedure must be repeated.

6.10 On the operating interface, select the desired test chamber for the instrument and click the corresponding “Open Mold” button. After clicking “Open Mold,” the self-locking mechanism of the permeability tester’s cover will disengage, opening the mold. Remove the specimen from the permeability tester and place it on the compression testing machine. At the center of each of the specimen’s lower end faces, position a steel shim 6 mm in diameter along the diameter, ensuring that both shims lie in the same vertical plane. Then, activate the compression testing machine to split the specimen into two halves along its longitudinal fracture plane. Following splitting, use a waterproof pen to mark the water‑stain lines.

6.11 The trapezoidal plate shall be placed on the splitting surface of the specimen, and a steel ruler shall be used to measure the water‑penetration height at 10 equally spaced points along the water‑streak line. If a reading at a particular point is obstructed by aggregate, the arithmetic mean of the water‑penetration heights measured near both ends of the aggregate may be taken as the water‑penetration height for that point.

6.12 On the operation interface, click the “Result Query” button to access the test result query screen, where you can query, export, and delete test data, as shown in the figure below.

Stepwise Pressurization Method

4.1 This method is applicable for determining the water impermeability of concrete, expressed in terms of its impermeability grade, by progressively applying hydraulic pressure.

4.2 The water penetration resistance test shall be conducted according to the following procedures:

4.2.1 Specimens shall be fabricated and cured in accordance with the procedures specified in Section 2 of this manual, and the water permeability test shall be conducted using groups of six specimens.

4.2.2 After formwork removal, the cement paste film on both end faces shall be brushed off with a wire brush, and the specimens shall be promptly transferred to a standard curing room for curing.

4.2.3 The age for the water permeability test is 28 days. One day prior to reaching the test age, the specimens shall be removed from the curing chamber and thoroughly wiped clean.

Allow the specimen surface to dry. Place the specimen in the mold sleeve of the permeability testing apparatus, and seal the specimen by pressurizing it with water injected into the airbag.

4.2.4 After the specimen is prepared, start the permeability testing apparatus. The operation screen will turn on, and the operating interface will appear, as shown in the figure below.

4.2.5 On the operation interface, select and click the “Parameter Settings” button to enter the parameter settings screen, as shown in Figure 4.2. On this screen, enter the required test data according to the number of test layers, and then return to the operation interface.

4.2.6 On the operator interface, select the desired test chamber for the instrument and click the corresponding “Open Mold” button. After clicking the “Open Mold” button, the self-locking mechanism of the permeability tester’s cover will disengage, opening the mold; place a set of six concrete specimens, one in each mold.

4.2.7 On the operation interface, select the desired instrument test layer and click the corresponding “Close Mold” button. After clicking the “Close Mold” button, the mold‑holding cover of the permeability tester will engage, and the self‑locking mechanism will close and lock in place.

4.2.8 After the specimen is properly installed, select the desired instrument test layer on the operation interface and click the corresponding “New Test” button to enter the new test interface, as shown in the figure below.

On the new test interface, enter the test number, impermeability grade, test method, initial water pressure, and final water pressure; in this method, select the step-by-step approach.

Pressurization method.

4.2.9 After completing the input, return to the operation interface. On the interface, select the desired test chamber and click the corresponding “Start Test” button. The permeability tester will automatically perform the sealing‑bag pressurization and sealing procedure, as well as the pressurized water‑injection phase of the permeability test. During the pressurized water‑injection phase, the system will automatically open the six valves corresponding to the selected test chambers. The initial water pressure should be set at 0.1 MPa, with subsequent increments of 0.1 MPa every 8 hours. Throughout the test, continuously monitor the specimen end faces for any signs of water leakage. If water leakage is observed on the surfaces of three or more of the six specimens, or if, after reaching the specified pressure, fewer than three specimens exhibit internal surface leakage within 8 hours, the test may be terminated, and the water pressure at that time should be recorded. Should water leakage occur around the perimeter during the test, the sealing procedure must be repeated.

4.2.10 On the operating interface, select the desired instrument test layer and click the corresponding “Open Mold” button. After clicking “Open Mold,” the self-locking mechanism of the permeability tester’s cover will disengage, opening the mold. Remove the specimen from the permeability tester and place it on the compression testing machine. At the center of each of the specimen’s lower end faces, position a steel shim 6 mm in diameter along the diameter, ensuring that both shims lie in the same vertical plane. Then, activate the compression testing machine to split the specimen into two halves along the overall fracture plane. Following splitting, use a waterproof pen to mark the water‑stain lines.

4.2.11 The trapezoidal plate shall be placed on the splitting surface of the specimen, and a steel ruler shall be used to measure the water‑penetration height at 10 equally spaced points along the water‑streak line. If a reading at a particular point is obstructed by aggregate, the arithmetic mean of the water‑penetration heights measured at the two adjacent ends of the aggregate may be taken as the water‑penetration height for that point.

4.2.12 On the operation interface, click the “Result Query” button to access the test result query screen, where you can query, export, and delete test data, among other operations.