Swell test apparatus is used to measure the swelling potential of soil samples, particularly in geotechnical engineering. It determines how much a soil sample will expand when exposed to water, helping to assess its stability and suitability for construction projects. The apparatus typically includes a mold, a means to apply a load to restrain swelling, and a dial gauge to measure the amount of swelling.
Key Features and Functions:
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Measuring Swelling:The apparatus measures the vertical expansion of a soil sample when it’s wetted.
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Determining Swelling Pressure:It can also measure the pressure exerted by the swelling soil, which is important for understanding how it might impact structures
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Analyzing Soil Behavior:The results of a swell test provide valuable information about the soil’s compressibility, its potential for movement, and its overall stability.
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Testing with Restraint:Some apparatuses are designed to allow for the measurement of swelling under a certain amount of restraint, which simulates real-world scenarios where soil might be subjected to pressure
Typical Components:
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Mold:A cylindrical container to hold the soil sample.
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Swell Plate:A perforated plate placed on top of the soil sample to facilitate water absorption and measure swelling
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Dial Gauge:A device used to measure the vertical movement of the swell plate as the soil expands.
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Loading System:A mechanism to apply a controlled load to the soil sample, allowing for the measurement of swelling under pressure.
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Soaking Tank:A tank to submerge the mold and soil sample in water for the swelling test
This equipment is used to monitor the swelling by placing it on top of the soil sample. The swell test consists of perforated plate (swell plate) with adjustable stem, dial gauge and dial gauge tripod for mounting swell dial gauge in position on CBR Mould Collar.
Standard Tripod to use with dial gauges