mould assembly for determination of permeability of soils

IS 11209: Scope - Key Specifications & Tables

Scope:
IS 11209 specifies the materials, dimensions, and construction details for mould assemblies used in soil permeability tests.

Key Points:

• Materials (Clause 3.1, Table 1):

• Dimensions & Tolerances (Clause 2.1):
  Dimensions as per Figures 1 to 6; tolerances follow IS: 2102 (Part 1) - 1980 (medium class).

• Units:
  All dimensions in millimetres (mm).
  Uses SI units for physical quantities (force in Newtons, pressure in Pascal, etc.).

Important Unit Conversions (from IS 11209):

This scope ensures uniformity in material quality and dimensional accuracy for reliable soil permeability testing equipment.

flowchart TD
    A[IS 11209 Scope] --> B[Materials Specification]
    A --> C[Dimensional Tolerances]
    B

IS 11209: Dimensions and Tolerances Summary

• Dimensions & Tolerances:

  • Refer to Figures 1 to 6 for nominal dimensions of equipment parts.
  • Unless otherwise specified, tolerances follow IS 2102 (Part 1)-1980, Medium Class.
  • Rounding off numerical values must comply with IS 2-1960.

• Key Figures Include:

  • Fig. 3: Drainage Base (3 holes, Ø11 mm at 120°)
  • Fig. 4: Drainage Cap (3 holes, Ø11 mm at 120°)
  • Fig. 5: Metal Ring (M10 with fly nut)
  • Fig. 6: Tie Rod
  • Fig. 7: Extension Collar

• General Tolerances (per IS 2102 Part 1):

  • Linear dimensions tolerance depends on nominal size range (e.g., ±0.1 mm for up to 10 mm, ±0.2 mm for 10-50 mm).
  • Angular tolerances typically ±1° or as specified.

• Units:

  • All dimensions in millimetres (mm).
  • Use SI units as per IS standards.

Example: Tolerance Table (IS 2102 Part 1 - Medium Class)

Notes:

• Always check the specific figure for dimensional details.
• Materials and special finishes are specified in Table 1 of IS 11209.
• For form and position tolerances, refer to IS 2102 Part 1.

flowchart LR
    A[Equipment Part] --> B{Dimension}
    B -->|Nominal| C[Refer to Fig. 1-6]
    B -->|Tolerance| D[IS 2102 (Part 1) Medium Class]
    C --> E[Dimension in mm]
    D --> E

This ensures standardized sizes and manufacturing precision for components under IS 11209.

IS 11209: Materials for Construction of Equipment Parts

Notes:

• IS 292 covers leaded brass ingots and castings.
• IS 318 covers leaded tin bronze ingots and castings.
• Tie rods and fly nuts require nickel or chrome plating for corrosion resistance.
• All dimensions and holes (e.g., drainage base/cap) are specified in millimeters with 3 holes of diameter 11 mm at 120° apart.

SI Units Reference (for clarity in specifications):

This table and specifications ensure correct material selection for durability, corrosion resistance, and compliance with Indian Standards in soil permeability test equipment.

IS 11209: Construction - Key Specifications & Materials

1. Materials for Equipment Parts (Table 1, Clause 3.1)

2. Construction Details (Clause 4.1)

• Assembly: Mould, drainage base, drainage cap, metal ring, tie rod, and extension collar as per Figures 1 to 7.
• Hydraulic Testing: Leakproof assembly tested at 100 kPa internal pressure.
• Hole Details: Drainage base & cap have 3 holes, 11 mm diameter, spaced at 120°.

3. Important Units & Definitions (SI Units)

Summary Diagram of Assembly Components

graph LR
  Mould --> DrainageBase
  DrainageBase --> DrainageCap
  DrainageCap --> MetalRing
  MetalRing --> TieRod
 

IS 11209: Marking - Key Specifications & Tables

Clause 5.1: Mandatory Marking on Equipment

Each equipment must be clearly and indelibly marked with:

• Manufacturer's name or registered trademark
• Date of manufacture
• Type of material

Clause 5.1.1: ISI Certification Mark

• Equipment may also carry the ISI Certification Mark.
• ISI Mark assures compliance with Indian Standards under strict inspection and quality control.

Materials for Equipment Parts (Table 1, Clause 3.1)

Additional Notes:

• Dimensions for holes and parts are in millimeters.
• Example: Drainage base and cap have 3 holes, 11 mm diameter, spaced at 120°.

Summary Diagram: Marking & Material Flow

graph TD
  A[Equipment] --> B[Marking]
  B --> C[Manufacturer's name/trademark]
  B --> D[Date of manufacture]
  B --> E[Type of material]
  B --> F[ISI Certification Mark (optional)]
  A --> G[Material Selection]
  G --> H[Mould - Brass/Gun Metal]
  G --> I[Drainage base/cap - Brass/Gun Metal]
  G --> J[Tie rod/fly nut - Mild Steel (Ni/Cr plated)]
  G --> K

IS 11209: Permeability Cell Assembly - Key Details

Though IS 11209 lacks explicit formulas, it specifies the mould assembly for soil permeability tests with the following key points:

• Permeability Cell Assembly:

  • Consists of a cylindrical mould with 6 tapped holes (M10) arranged at 60° intervals around the circumference for clamping.
  • Designed to hold soil samples under controlled conditions for permeability measurement.

• Marking:

  • Equipment may bear the ISI Certification Mark ensuring compliance with quality and testing standards.

Typical Dimensions & Specifications (per IS 11209 and common practice):

Permeability Test Formula (Darcy’s Law):

[ k = \frac{QL}{A t h} ]

Where:

• (k) = coefficient of permeability (m/s)
• (Q) = volume of water passed (m³)
• (L) = length of soil sample (m)
• (A) = cross-sectional area of soil sample (m²)
• (t) = time taken for flow (s)
• (h) = hydraulic head difference (m)

flowchart TD
    A[Water Reservoir] --> B[Permeability Cell Assembly]
    B --> C[Soil Sample]
    C --> D[Water Outlet]
    D --> E[Measuring Cylinder]

Summary: IS 11209 defines the mould assembly with 6 M10 tapped holes at 60° spacing, suitable for permeability tests using Darcy’s law. The ISI mark ensures quality compliance.

IS 11209: Testing and Quality Requirements - Key Points

1. Materials (Clause 3.1, Table 1)

• Mould, Drainage Base, Drainage Cap, Metal Ring, Extension Collar: Brass/Gun Metal as per IS: 292-1983 / IS: 318-1981.
• Tie Rod and Fly Nut: Mild Steel, nickel/chromium plated as per IS: 4367-1967.

2. Marking and Certification (Clause 5.1.1)

• Equipment may bear ISI Certification Mark, ensuring compliance with IS 11209.
• ISI mark implies adherence to strict inspection, testing, and quality control by ISI.

3. Units and Definitions (International System of Units)

• Force: 1 N = 1 kg·m/s²
• Pressure/Stress: 1 Pa = 1 N/m²
• Energy: 1 J = 1 N·m
• Power: 1 W = 1 J/s

4. Testing Reporting

• Final test results should be rounded as per IS : 2 - 1960.

Summary Table: Materials for Equipment Parts

This ensures quality and uniformity in equipment construction and testing under IS 11209.

Use of ISI Certification Mark as per IS 11209:1985

• Clause 5.1.1 states that equipment may be marked with the ISI Certification Mark.
• The ISI Mark assures compliance with the Indian Standard under a strict system of inspection, testing, and quality control supervised by ISI.
• The mark indicates continuous conformity checks by ISI for quality assurance.
• Use of the ISI Mark is governed by the Indian Standards Institution (Certification Marks) Act and related rules.
• Manufacturers/processors must obtain a license from ISI to use the mark legally.
• Details on licensing conditions are available from the Indian Standards Institution.

Key Points:

• ISI Mark = Quality assurance symbol for products meeting IS standards.
• Requires licensing and ongoing surveillance by ISI.
• Provides consumer confidence in product reliability and standard compliance.

Reference Table: SI Units used in IS 11209

flowchart LR
    A[Manufacturer] --> B[Apply for ISI License]
    B --> C{License Granted?}
    C -- Yes --> D[Use ISI Mark on Product]
    C -- No --> E[Cannot use ISI Mark]
    D --> F[ISI Surveillance & Testing]
    F --> G[Continuous Quality Assurance]

Summary: The ISI Certification Mark is a trusted quality mark under IS 11209, requiring licensing and compliance with ISI's inspection and testing regime.

IS 11209: References to Related Indian Standards & SI Units

Key Specifications:

• Dimensions: All dimensions in millimetres (mm).
• Marking: Equipment may bear the ISI Certification Mark (Clause 127.3).
• Figures: Drainage base, cap, metal ring, tie rod, extension collar—all with specified dimensions and hole patterns (3 holes, Ø11 mm at 120°).

Related Indian Standards:

• IS 11209:1985 itself is referenced for design and testing of drainage equipment.
• Other related IS codes typically cover materials, testing methods, and installation procedures for geotechnical and drainage equipment (refer to IS codes on soil engineering, civil engineering materials).

International System of Units (SI) as per IS 11209:

Important Formulae:

• Force:
  [ F = m \times a \quad (N = kg \cdot m/s^2) ]
• Pressure (Stress):
  [ \sigma = \frac{F}{A} \quad (Pa = N/m^2) ]

Summary Diagram of Hole Pattern (Drainage Base/Cap):

circleDiagram
    title Drainage Base/Cap Hole Pattern
    circle
    hole1: Ø11 mm at 0°
    hole2: Ø11 mm at 120°
    hole3: Ø11 mm at 240°

**Use IS 11209:1985 for standard dimensions and SI unit