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Water-Filling Method Rapid Compaction Tester, Water-Filling Method Compaction Tester, Water-Filling Method

This method is suitable for the rapid assessment of railway subgrade compaction. By measuring the volume of water poured into the test cylinder, the bulk density of the material in the cylinder can be calculated, thereby determining the compaction degree.

Water Filling Method (T0110—93)

6.4.1 Purpose and Scope of Application

This test method is applicable to the in-situ determination of the density of coarse-grained and very coarse-grained soils.

6.4.2 Instruments and Equipment

6.4.2.1 Seat Plate: The seat plate is an iron plate with a circular hole in the center and a square or circular outer edge, with a retaining ring provided at the circular hole.

The diameter of the casing hole shall be three times the maximum particle size of the stones present in the soil, and the height of the casing ring shall be 5% of the particle size.

6.4.2.2 Film: Polyethylene plastic film.

6.4.2.3 Water Storage Cylinder: The diameter shall be uniform, and the cylinder shall be equipped with graduations.

6.4.2.4 Platform scale: capacity 50 kg, readability 5 g.

6.4.2.5 Other: pickaxes, shovels, levels, etc.

6.4.3 Test Procedure

Maximum particle size of the specimen

(mm)
Test Pit Dimensions (mm)

Diameter Depth

5~20

40

60

200

150

200

250

800

200

250

300

1000

6.4.3.1 The maximum particle size of the test specimen shall be determined in accordance with the table.

Determine the dimensions of the test pit.

6.4.3.2 Mark the outline of the pit opening according to the specified test-pit diameter. Level the ground surface at each measurement point, removing any loose soil, stones, debris, and other foreign materials. Fill any depressions or uneven areas with sand to achieve a smooth surface. Use a leveling instrument to verify that the ground surface is horizontal.

6.4.3.3 After the ground surface has been leveled, secure the base plate. Carefully lay the polyethylene plastic film along the inner wall of the ring formwork and tightly against the ground surface. Record the initial water level in the water storage cylinder, then open the filling valve of the cylinder and slowly inject water from above the ring formwork until the cylinder is just full but no water overflows. Record the water level in the cylinder and calculate the volume of the portion of the base plate. While keeping the base plate securely fixed, drain the water contained in the plastic film to a location that will not affect the test, and then carefully remove the plastic film from the base plate.

6.4.3.4 Excavate within the outline to the specified depth, place the samples that have fallen into the pit into a soil-sampling container, and determine the moisture content.

6.4.3.5 Use excavation tools to dig a test pit along the holes on the base plate; to ensure tight contact between the pit walls and the plastic film, the pit walls must be properly trimmed. Lay the plastic film tightly against both the pit bottom and the pit walls. When filling the bag formed by the film with water, gently pull and release a section of the film while simultaneously adding water, so as to expel any air trapped between the film and the pit walls and thereby enhance the close adhesion of the film to the pit walls.

6.4.3.6 Record the initial water level in the water storage cylinder, then open the water-fill valve of the cylinder and slowly inject water into the plastic film. When the water surface approaches the upper edge of the ring sleeve, reduce the flow rate until the water surface is flush with the upper edge of the ring sleeve, at which point close the water-fill valve. Maintain this condition for 3 to 5 minutes, then record the water level in the storage cylinder.

Technical Specifications

1. The test cylinder has a diameter of 300 mm and a height of 300 mm;

2. Maximum water capacity: 10,000 ml;

3. Accuracy: ±25 ml

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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Water-Filling Method Tester

This method is suitable for the rapid assessment of railway subgrade compaction. By measuring the volume of water poured into the test cylinder, the bulk density of the material in the cylinder can be calculated, thereby determining the compaction degree.

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qcj@cnhblabequipment.com

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Water Filling Method (T0110—93)

Technical Specifications

Water-Filling Method Tester