consolidometer for determination of consolidation properties
1988 Edition

IS 12287: Scope & Essential Specifications for Consolidometer Devices

1. Scope (Clause 1)

• Defines requirements for consolidometers utilized in one-dimensional consolidation tests.
• Applicable to consolidometers sized at 50 mm and 60 mm.
• Used to evaluate soil consolidation properties.

2. Material Composition (Table 1)

3. Dimensions & Tolerance Details

• Detailed drawings available in Figures 1 through 11 for both 50 mm and 60 mm variants.
• Tolerance values conform to IS 2102 (Part 1)-1980 (medium class).
• Nominal dimensions are standard unless otherwise noted.

Equipment Component Diagram

graph TD
    A[Base] --> B[Water Jacket]
    B --> C[Water Inlet]
    A --> D[Ring]
    D --> E[Collar]
    E --> F[Loading Pad]
    F --> G[Rubber Gasket]
    G --> H[Porous Disc A]
    G --> I[Porous Disc B]

For full dimensional details, consult Figures 1-11 in IS 12287. The standard promotes uniformity and precision.

IS 12287: Summary of Critical Dimensions & Tolerances

• Dimensions & Accuracy:

  • Refer to Figures 1-11 for nominal dimensions of all parts.
  • Unless specified, tolerances comply with IS 2102 (Part 1)-1980, medium grade.
  • Example: Grooves are sized 1.5 mm by 1.5 mm (Clause 1.5).

• Typical Sizes (in mm):

  • Bases, water jackets, rings, collars, loading pads, gaskets, and porous discs are distinctly dimensioned for 50 mm and 60 mm sizes.
  • All measurements are in millimetres.

• Material Information (Table 1):

Important Reminders:

• Tolerances follow IS 2102 Part 1 unless otherwise mentioned.
• Refer to Figures 2A, 2B, 3A, 3B, etc., for precise drawings.
• Materials chosen for longevity and corrosion resistance critical for testing accuracy.

flowchart LR
    A[Base] --> B[Water Jacket]
    B --> C[Screws]
    C --> D[Water Inlet]
    D --> E[Ring]
    E --> F[Collar]
    F --> G[Loading Pad]
    G --> H[Gasket]
    H --> I[Porous Discs A & B]

For exact dimensions, refer to the figures in IS 12287.

IS 12287 - Material Details for Consolidometer Components

Table 1: Constituent Materials

Notes:

• IS 292-1983 covers leaded brass ingots and castings.
• IS 3622-1977 specifies sandstone slabs and tiles.
• Metallic components are chrome or rhodium plated to resist corrosion.
• Rubber gaskets provide effective sealing.

Summary

• Metallic parts: Leaded brass with chrome/rhodium plating.
• Gaskets: Rubber.
• Porous discs: Sandstone stone.
• Compliance with IS standards assures durability and operational reliability.

IS 12287: Guidelines for Fabrication of Consolidometer Equipment

Materials (Refer to Table 1)

Fabrication & Dimensions

• Dimensions for 50 mm and 60 mm sizes are as per Figures 1-11.
• Tolerances conform to IS 2102 (Part 1) - 1980, medium class.
• Features include 1.5 x 1.5 mm grooves and straight knurled surfaces on components.
• Loading pads and porous discs have specific dimensional specifications (Figs. 8A/B, 9A/B, 10A/B, 11A/B).

Summary

• Use leaded brass with chrome/rhodium plating for metal components to prevent corrosion.
• Employ rubber gaskets to ensure proper sealing.
• Use stone porous discs compliant with IS 3622 standards.
• Maintain dimensional tolerances as per IS 2102 for precision.

flowchart TD
    A[Base (Leaded Brass)] --> B[Water Jacket]
    B --> C[Screws]
    C --> D[Water Inlet]
    D --> E[Ring]
    E --> F[Collar]
    F --> G[Loading Pad]
    G --> H[Gasket]
    H --> I[Porous Discs]

This guarantees consistent performance and durability.

IS 12287 - Identification Marking Requirements (Clause 5.1)

Each consolidometer must be clearly and permanently marked with:

• a) Manufacturer's name and/or registered trademark
• b) Manufacturing date
• c) Material type used

Additional Details:

• Material specifications per Table 1 include:

  • Base, water jacket, screws, loading pad, ring, collar: Leaded brass with chrome/rhodium plating according to IS 292-1983
  • Gasket: Rubber
  • Porous discs A & B: Stone as specified in IS 3622-1977

• Marking facilitates equipment traceability and material verification for quality assurance.

Marking Overview Table:

flowchart TD
    A[Consolidometer] --> B[Marking]
    B --> C[Manufacturer Name/Trademark]
    B --> D[Date of Manufacture]
    B --> E[Material Type]

Refer to Bureau of Indian Standards guidelines for marking placement and style.

IS 12287 - Assembly Instructions and Leakproof Standards

1. Leakproof Assembly (Clause 4.2)

• The equipment must be leakproof when the water jacket is filled and screws are tightened solely by hand.
• No additional torque or sealants are necessary beyond hand tightening.

2. Material Summary (Table 1)

3. Dimensional & Construction Criteria

• Follow Figures 1 through 11 for exact measurements and tolerances.
• Tolerances adhere to IS 2102 (Part 1)-1980 (medium class).
• Key features include grooves of 1.5 x 1.5 mm, knurling on the water jacket, and precise pitch circle diameters for screw holes (e.g., 28.5 mm & 43.5 mm PCD).

4. Critical Leakproof Assembly Specifications

• Incorporate rubber gasket as detailed in Figures 9A/B for sealing.
• Ensure all mating surfaces are clean and intact.
• Uniformly hand-tighten screws to avoid distortion.

flowchart TD
    A[Assemble Base & Water Jacket] --> B[Insert Rubber Gasket]
    B --> C[Place Porous Disc]
    C --> D[Hand Tighten Screws on PCD]
    D --> E{Water Filled}
    E -->|No Leak| F[Passes Leak Test]
    E -->|Leak Detected| G[Inspect Gasket & Retighten]

Summary:
A leakproof seal is achieved by hand-tightening screws over a rubber gasket, using specified materials and dimensions, ensuring reliable performance.