About Permeability Apparatus For Constant And Variable Head Test
Compliance Standards
IS : 2720 (Part 17)-1986, IS : 11209-1985, IS : 9198
Purpose
To study the permeability characteristics of all type of soil samples (For both Re molded as well as undisturbed specimen) under different conditions of Laboratory as well as in the field.
Set up consists of following parts and accessories
- Gunmetal mould 100mm dia x 127.3mm height x 1000ml volume, with collar of 100mm dia X 60mm high (as per IS:11209 - 1985)
- Drainage base plate
- Drainage cap
- Metallic clamping ring
- Two porous stone for base and cap
- Dummy plate
- Air release valve
- Rubber tube of 3 meter length
- Pinch cock for rubber tube
- Over head tank made of G.I. sheet with six outlet at bottom and inlet port on top (For constant head test)
- With a set of three glass stand pipes approximately 6mm, 10mm and 20mm diameter x 1 meter length mounted on a wooden board
- The end of the glass tube is serrated to connect rubber tube of 3 meter length with pinch cock.
- Compaction device
Versatile Dual Test CapabilityThis apparatus is equipped to perform both constant and variable head tests on soil samples, providing flexibility for diverse laboratory requirements. With interchangeable molds and adjustable measurement settings, users benefit from the ability to assess a wide range of soil permeability characteristics. Its robust construction ensures reliable results and prolonged equipment longevity.
Precision Measurement and Safety FeaturesThe permeability apparatus includes clear markings for accurate graduation readings and an analog scale with 0.01 cm resolution, ensuring precision in head loss and flow rate calculations. Additional safety attributes such as a pressure relief outlet and splash guard safeguard operators against spillages and excessive pressure, elevating both accuracy and safety in laboratory procedures.
Easy Sample Preparation and User HandlingIt comes complete with all necessary sample preparation tools, allowing users to efficiently process soil specimens for testing. The bench-top mounting with a compact footprint enables convenient placement in laboratory environments, facilitating straightforward set-up and operation for technicians and engineers.
FAQs of Permeability Apparatus For Constant And Variable Head Test:
Q: How is the Permeability Apparatus for Constant and Variable Head Test used in soil analysis?
A: The apparatus is utilized to determine soil permeability by measuring the rate at which water flows through a soil specimen under controlled head conditions. Users place the prepared sample in the cylinder, set the desired head (constant or variable), and manually control the test while observing measurements using the analog scale and clear graduations.
Q: What safety features does this permeability equipment offer during operation?
A: Safety is enhanced through the inclusion of a pressure relief outlet and a splash guard, which help prevent accidental spills and overpressure situations, ensuring safe handling for laboratory personnel throughout the testing process.
Q: When should I perform constant head versus variable head tests using this apparatus?
A: Constant head tests are typically used for coarse-grained soils where water flows rapidly, while variable head tests are suited for fine-grained soils with slower permeability rates. The apparatus supports both methods for flexibility based on sample characteristics and standard compliance.
Q: Where is this equipment most suited for installation or usage?
A: Designed for laboratory use, the apparatus is best mounted on a bench-top due to its compact dimensions and manual operation features, making it ideal for educational institutions, research laboratories, and quality control facilities.
Q: What is the process for preparing and inserting a soil specimen into the apparatus?
A: Sample preparation tools included in the package are used to compact and shape the soil specimen to the required size (6 cm diameter x 12 cm height), which is then placed in the chamber before connecting to the measuring tubes and initiating the permeability test.
Q: How does this product benefit soil testing laboratories in terms of compliance and accuracy?
A: The apparatus conforms to IS: 2720 (Part 17) and ASTM D2434 standards, guaranteeing reliable and consistent test results. Its high measurement accuracy (1%) and immediate response enable laboratories to efficiently evaluate soil permeability for engineering and environmental studies.