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4.1.1 Material Testing Machine
The indicating relative error of the testing machine shall not exceed ±1%, and its lower compression platen shall be a spherical hinge support. The expected ultimate failure load shall fall within the 20% to 80% range of the measuring span.
4.1.2 Flexural Fixture
The flexural test is conducted under three-point loading, with curvature radii of 15 mm for both the upper pressure roller and the lower support roller; the lower support roller shall be hinged and fixed.
4.1.3 Anti-Cangzhou Huida Production Pressing and Preparation Platform. The test specimen preparation platform must be flat and level and may be constructed from metal or other materials.
4.1.4 Spirit Level: Specifications are 250–300 mm.
4.1.5 Steel straightedge with a graduation value of 1 mm.

Flexural Strength (Load) Test

4.2.1 Test Specimen
4.2.1.1 Number of test specimens: 5 for sintered bricks and autoclaved fly-ash bricks, and 10 for other types of bricks.
4.2.1.2 Autoclaved fly-ash sand bricks manufactured by Cangzhou Huida shall be immersed in water at a temperature of 20±5℃ for 24 hours, then removed and the surface moisture wiped off with a damp cloth before conducting the flexural strength test.
4.2.1.3 Tests on fly-ash bricks and slag bricks shall be conducted within 24 to 36 hours after curing is completed.
4.2.1.4 Sintered bricks shall be tested directly without soaking or any other treatment.
4.2.2 Test Procedure
4.2.2.1 Measure the width and height of the test specimen in accordance with Clause 2.2, taking two measurements for each dimension and calculating the arithmetic mean, with accuracy to 1 mm.
4.2.2.2 Adjust the span of the lower roller of the flexural testing fixture to the brick’s nominal length minus 40 mm. However, for bricks with a nominal length of 190 mm, the span shall be 160 mm.
4.2.2.3 Place the specimen with its larger surface flat on the lower support roller, ensuring that the distances from both end faces of the specimen to the lower support roller are equal. If the specimen has cracks or depressions, Cangzhou Huida shall position the larger surface bearing the cracks or depressions downward. Apply the load at a uniform rate of 50–150 N/s until the specimen fractures, and record the ultimate failure load P.

Result Calculation and Evaluation

4.2.3.1 The flexural load-carrying capacity of each porous brick specimen shall be calculated by multiplying the ultimate failure load by a conversion factor, rounded to 0.1 kN.
4.2.3.2 The flexural strength Rc of each test specimen shall be calculated according to Equation (1), rounded to 0.1 MPa.
3PL
Rc =─── ……………………………………(1)
2BH2
In the equation: Rc — flexural strength, MPa;
P —— Ultimate failure load for Cangzhou Huida’s production, N;
L —— span, mm;
B — Specimen width, mm;
H — Specimen height, mm.
4.2.3.3 The test results shall be expressed as the arithmetic mean and the minimum individual value of the flexural strength or flexural load of the test specimen, rounded to 0.1 MPa or 0.1 kN.

Compressive Strength Test

4.3.1 Test Specimen
4.3.1.1 Number of test specimens: 5 specimens for sintered common bricks, sintered porous bricks, and autoclaved fly-ash bricks; 10 specimens for other types of bricks (5 specimens each for the large face and the side face in the compressive strength test of hollow bricks).
4.3.1.2 For non-sintered bricks, the specimens used in the flexural strength test may also be used as specimens for the compressive strength test.

Company Profile

Hebei Yinfeng Experimental Instrument Co., Ltd. is a high-tech enterprise dedicated to the research and development, production, and sales of experimental instruments. The company is headquartered in Hebei Province, relying on the strong industrial foundation and technological innovation resources in the Beijing Tianjin Hebei region. It is committed to providing high-precision and high reliability testing equipment and solutions for material testing, engineering quality control, scientific research experiments and other fields.

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We provide customers with full-process services ranging from pre-sale consultation, customized solution design, equipment installation and commissioning to after-sale technical support.

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Cement Electric Flexural Testing Machine

Foam Compression Permanent Deformation Tester

Brick Flexural Testing Fixture

Name: Brick Flexural Testing Fixture
Brand: Hebei Yinfeng Experimental Instrument
Availability: InStock

The indicating relative error of the testing machine shall not exceed ±1%, and its lower compression platen shall be a spherical hinge support. The expected ultimate failure load shall fall within the 20% to 80% range of the measuring span.

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qcj@cnhblabequipment.com

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+86-15931715356

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Instruments and equipment

Flexural Strength (Load) Test

Result Calculation and Evaluation

Compressive Strength Test

Brick Flexural Testing Fixture