Ceramic Tiles - Methods of Test, Sampling and Basis of Acceptance, Part 4: Determination of linear thermal expansion (see IS 13630: Parts 1 to 15)

IS 13630 Part 4: Scope Summary

• Scope Definition: This part of IS 13630 standardizes methods related to testing and analysis of materials or components (specific scope depends on Part 4's focus, e.g., fatigue, fracture, etc.).
• Rounding Off Rules: Final test or analysis results must be rounded per IS 2:1960:
  • Retain the same number of significant figures as specified in the standard.
  • Ensures consistency and accuracy in reporting.

Key Specifications:

IS 2:1960 Rounding Rules (Summary):

• If digit after last significant figure <5, round down.
• If digit after last significant figure ≥5, round up.
• Maintain equal decimal places as specified.

If you need formulas or tables specific to Part 4's technical content, please specify the exact test or parameter (e.g., fatigue life, fracture toughness).

Key References & Specifications from IS 13630 Part 4 (2006)

1. Coefficient of Linear Expansion (Clause 6.1)

• Formula:
  [ \alpha = \frac{\Delta L}{L_0 \times \Delta T} \times 10^6 \quad (^\circ C^{-1}) ] where:

  • ( L_0 ) = original length of specimen at ambient temperature
  • ( \Delta L ) = increase in length
  • ( \Delta T ) = temperature rise

• Expressed to the first decimal place in units of ( \times 10^{-6} / ^\circ C ).

• Test report must include:

  • Apparatus description
  • Tile description
  • Coefficient values for both specimens

2. Rounding Off (IS 2:1960)

• Final values (test or calculated) must be rounded off as per IS 2:1960 rules, retaining the same number of significant figures as specified.

3. Amendments & BIS Offices

• Amendments table provided (blank in the context).
• Contact details for BIS headquarters and regional offices are listed for standards and certification inquiries.

Summary Table for Coefficient of Linear Expansion

flowchart LR
    A[Start: Measure initial length \(L_0\)] --> B[Heat specimen by \(\Delta T\)]
    B --> C[Measure length increase \(\Delta L\)]
    C --> D[Calculate \(\alpha = \frac{\Delta L}{L_0 \times \Delta T} \times 10^6\)]
    D --> E[Round off \(\alpha\) per IS

IS 13630 Part 4: Apparatus for Thermal Expansion Testing

Key Specifications:

• Heating Rate: Apparatus must heat specimens at 3ºC/min with uniform heat distribution (Clause 3.1).
• Soaking Time: Some apparatus require soaking at 100ºC before testing (Clause 3.1).
• Specimen Size:
  • Length = 25.4 ± 1 mm
  • Diameter = 10 ± 1 mm
  • Or as per apparatus requirement (Clause 4.3).
• Ambient Temperature: Record ambient temperature before starting test (Clause 5.3).
• Rounding Off Results: Follow IS 2:1960 for rounding numerical results, retaining significant figures as per the standard (Clause None).

Typical Procedure Outline:

flowchart TD
    A[Place specimen in apparatus] --> B[Note ambient temperature]
    B --> C[Heat at 3ºC/min uniformly]
    C --> D[Soak at 100ºC if required]
    D --> E[Measure thermal expansion]
    E --> F[Calculate and round off results per IS 2:1960]

This ensures accurate and standardized thermal expansion measurement.

IS 13630 Part 4 - Test Specimens: Key Specifications & Formulas

Test Specimen Dimensions (Clause 4.3)

• Length: 25.4 ± 1 mm
• Diameter: 10 ± 1 mm
• Alternatively, size as per apparatus requirement.

Specimen Preparation (Clause 4.2)

• Ends must be ground flat and parallel to ensure accurate measurement.

Coefficient of Linear Thermal Expansion (Clause 6.1)

[ \alpha = \frac{\Delta L}{L_0 \times \Delta T} \times 10^6 \quad ( \times 10^{-6}/°C ) ]

Where:

• ( L_0 ) = Initial length at ambient temperature
• ( \Delta L ) = Increase in length
• ( \Delta T ) = Temperature rise

Test Report Must Include:

• Description of apparatus
• Description of test specimens
• Calculated coefficient of linear thermal expansion for both specimens

Summary Table for Specimen Dimensions

This ensures standardized testing for reliable thermal expansion data.

IS 13630 Part 4: Procedure - Key Points

• Test Specimen Dimensions (Clause 4.3):

  • Length = 25.4 ± 1 mm
  • Diameter = 10 ± 1 mm
  • Alternatively, specimen size may be as per the testing apparatus requirements.

• Rounding Off Results (No specific clause number):

  • Follow IS 2:1960 for rounding off numerical values.
  • Final values from tests or calculations must be rounded to the same number of significant figures as specified in the standard.

Summary Table for Test Specimen Dimensions

Notes:

• Ensure specimen preparation is precise to ensure test validity.
• Rounding rules maintain consistency and accuracy in reporting results.

flowchart TD
    A[Test Specimen Preparation] --> B{Dimensions}
    B -->|Length| C[25.4 ± 1 mm]
    B -->|Diameter| D[10 ± 1 mm]
    A --> E[Testing]
    E --> F[Result Calculation]
    F --> G[Rounding off as per IS 2:1960]
    G --> H[Final Report]

IS 13630 Part 4 - Expression of Results: Key Points

1. Rounding Off (General)

• Follow IS 2:1960 for rounding off numerical values.
• Retain the same number of significant places as specified in the standard.

2. Rate of Heating (Clause 5.5)

• Heating rate for test: 3ºC/min

3. Coefficient of Linear Expansion (Clause 6.1)

[ \alpha = \frac{\Delta L}{L_0 \times \Delta T} \times 10^6 \quad ( \times 10^{-6}/^\circ C) ]

Where:

• ( \alpha ) = coefficient of linear expansion

• ( L_0 ) = original length at ambient temperature

• ( \Delta L ) = increase in length

• ( \Delta T ) = temperature rise

• Express ( \alpha ) to 1 decimal place (e.g., 6.5 × 10⁻⁶/°C).

4. Test Report Must Include:

• Brief description of apparatus used.
• Description of test specimens (tiles).
• Coefficient of linear thermal expansion for each specimen.

Summary Table: Expression of Results

flowchart TD
    A[Start: Measure initial length \(L_0\)] --> B[Heat specimen at 3°C/min]
    B --> C[Measure length increase \(\Delta L\)]
    C --> D[Calculate \(\alpha = \frac{\Delta L}{L_0 \Delta T} \times 10^6\)]
    D --> E[Round off \(\alpha\) to 1 decimal place]
    E --> F[Prepare test report with apparatus, specimen, and \(\alpha\)]

This concise summary ensures compliance with IS 136

IS 13630 Part 4 — Test Report Key Points

Test Specimens (Clause 3.4 & 4.3)

• Length: 25.4 ± 1 mm
• Diameter: 10 ± 1 mm
• Alternatively, specimen size per apparatus requirement

Coefficient of Linear Expansion, α (Clause 6.1)

[ \alpha = \frac{\Delta L}{L_0 \times \Delta T} \times 10^6 \quad ( \times 10^{-6}/^\circ C ) ]

Where:

• (L_0) = initial length at ambient temperature
• (\Delta L) = increase in length
• (\Delta T) = temperature rise

Test Report Must Include:

• Brief description of apparatus
• Description of tiles (test specimens)
• Coefficient of linear thermal expansion for both specimens

Rounding Off (IS 2:1960)

• Final results rounded to the same decimal places as specified values

flowchart TD
    A[Test Specimens] --> B[Measure Initial Length \(L_0\)]
    B --> C[Heat Specimen]
    C --> D[Measure Length Increase \(\Delta L\)]
    D --> E[Calculate \(\alpha\)]
    E --> F[Prepare Test Report]
    F --> G[Include Apparatus, Tile Description, \(\alpha\) values]

This concise summary follows IS 13630 Part 4 requirements for test reporting of linear thermal expansion.