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Applications of the lightweight aggregate strength compression cylinder
This applies to the testing of porous lightweight aggregates, including fly-ash ceramsite and ceramsite sand, clay ceramsite and ceramsite sand, shale ceramsite and ceramsite sand, and natural lightweight aggregates.
Product Overview
The lightweight aggregate compression cylinder is a specialized instrument used in accordance with GB 2842-81, “Test Methods for Lightweight Aggregates,” to determine the average relative strength index of lightweight aggregate particles. It is suitable for testing porous lightweight aggregates such as fly-ash ceramsite and ceramsite sand, clay ceramsite and ceramsite sand, shale ceramsite and ceramsite sand, and natural lightweight aggregates.
Test Procedure for the Compressive Cylinder Test of Lightweight Coarse Aggregate
1. Select test samples with a particle size of 10–20 mm (for fly-ash ceramsite, a particle size of 10–15 mm is permissible), ensuring that the volumetric proportion of the 10–15 mm fraction is between 50% and 70%.
2. Place the test sample in a pressurized cylinder (with a cylindrical bottom), determine the loose bulk density three times, and calculate the arithmetic mean. For natural aggregates, multiply the measured average loose bulk density by a packing factor of 1.15 to obtain the required sample quantity; for other aggregates, multiply by a packing factor of 1.10.
3. Weigh the test sample according to the above-mentioned sample quantity, place it into the pressure cylinder, and first gently tap the cylinder wall several times with a wooden hammer. Then install the guide cylinder and the punching die, and check whether the lower graduation line of the punching die aligns with the upper edge of the guide cylinder. If they do not align, continue gently tapping the cylinder wall until complete alignment is achieved. Place the pressure cylinder on the lower platen of the testing machine and apply the load at a uniform rate of approximately 30–50 kg per second. When the punching die has been pressed in to a depth of 20 mm, record the corresponding pressure value.
Technical Parameters of the Light Coarse Aggregate Compression Cylinder
The internal dimensions of the cylinder are 115 mm × 100 mm, with a perpendicularity deviation of -1 mm.
The external dimensions of the stamping die are 113 mm × 70 mm, with a perpendicularity deviation of -1 mm.
The cylinder body, guide sleeve, and stamping die shall all be perfect right circular cylinders, with a perpendicularity between their top and bottom surfaces and the cylindrical surface not exceeding 1 mm.
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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