Ceramic Tiles - Methods of Test, Sampling and Basis of Acceptance, Part 5: Determination of resistance to thermal shock (see IS 13630: Parts 1 to 15)

IS 13630 Part 5: Scope Overview

• Scope Definition: This part of IS 13630 covers specific requirements for design, testing, or analysis related to the subject matter (e.g., structural components, materials, or systems) defined in the broader IS 13630 series.
• Rounding Off Rules: Final values from tests or calculations must be rounded per IS 2:1960 rules:
  • Retain the same number of significant digits as the specified value.
  • Ensures consistency and accuracy in reporting results.

Key Points:

IS 2:1960 Rounding Summary:

• If the digit to be dropped is >5, round up.
• If <5, round down.
• If exactly 5, round to the nearest even digit (to avoid bias).

flowchart LR
    A[Test/Analysis Result] --> B[Apply IS 2:1960 Rounding]
    B --> C{Digit to drop?}
    C -->|>5| D[Round Up]
    C -->|<5| E[Round Down]
    C -->|=5| F[Round to Nearest Even]
    D --> G[Final Value]
    E --> G
    F --> G

For detailed formulas or tables, refer to other specific clauses or parts within IS 13630 series.

IS 13630 Part 5 primarily references other standards and specifies rounding rules rather than providing direct formulas or tables.

Key Points from IS 13630 Part 5:

• References: The standard draws extensively from other Indian Standards and international codes for its provisions.
• Rounding Off:
  • Follow IS 2:1960 for rounding numerical values.
  • The number of significant digits in the rounded result must match those in the specified value.

Practical Implications:

• When reporting test or analysis results, round off values carefully to maintain consistency and compliance.
• Use referenced standards (like IS 2:1960) for rounding rules rather than arbitrary rounding.

Summary Table for Rounding (from IS 2:1960):

This ensures uniformity in reporting structural test results.

If you need specific formulas or tables, refer to the respective parts of IS 13630 or other referenced IS codes.

IS 13630 Part 5: Definitions - Key Points & Specifications

Context:

• Definitions and terminology are largely aligned with ISO 13006:1998 (Ceramic tiles - Definitions, classification, characteristics, marking).
• Numerical values and test results are rounded per IS 2:1960 rules.

Key Specifications for Definitions:

• Test Specimen Examination (Clause 5.5):
  • Inspect tiles at 25–30 cm distance under ~300 lux illumination.
  • Use a 1% methylene blue solution with wetting agent to highlight defects.
  • After 1 min, wipe stain with a damp cloth.
  • Report must include:
    • Tile description
    • Water absorption coefficient
    • Test type (with/without immersion)
    • Number of specimens with visible defects

Rounding Off Rule (IS 2:1960):

• Round off test results to the same number of significant figures as specified values.

Summary Table: Examination Parameters

This ensures uniformity in defining and testing ceramic tiles per IS 13630 Part 5.

flowchart TD
    A[Test Specimen] --> B[Visual Inspection]
    B --> C[Distance: 25-30 cm]
    B --> D[Illumination: ~300 lux]
    B --> E[Apply 1% Methylene Blue]
    E --> F[Wait 1 min]
    F --> G[Wipe stain]
    G --> H[Record visible defects]

For detailed definitions, refer to ISO 13006:1998 and rounding per IS 2:1960.

IS 13630 Part 5: Test Specimens - Key Specifications & Procedures

1. Number of Specimens:

• Minimum 5 test specimens required for testing.

2. Oven Conditions (Clause 3.2):

• Oven temperature: 145°C to 150°C.

3. Visual Examination (Clause 5.5):

• Inspect specimens at 25-30 cm distance under illumination of approx. 300 lux.
• Use naked eye or spectacles if normally worn.
• Apply 1% aqueous methylene blue solution with wetting agent on glazed surfaces.
• After 1 minute, wipe stain with damp cloth to highlight defects.
• Specimens must be free from visible defects before testing.

4. Test Report Must Include:

• Tile description.
• Water absorption coefficient.
• Type of test (with/without immersion).
• Number of specimens with visible defects.

Summary Table for Test Specimens

flowchart TD
    A[Test Specimens (min 5)] --> B[Oven Conditioning (145-150°C)]
    B --> C[Visual Inspection]
    C --> D{Defects?}
    D -- Yes --> E[Reject Specimen]
    D -- No --> F[Proceed with Test]
    F --> G[Record Results in Report]

This ensures reliable, standardized evaluation of tiles per IS 13630 Part 5.

IS 13630 Part 5: Test Apparatus Key Details

Oven (Clause 3.2)

• Temperature range: 145°C to 150°C
• Used for conditioning test specimens.

Low Temperature Bath (Clause 3.1)

• Temperature: 15 ± 5°C (cold water flow)
• Example dimensions:
  • Length: 550 mm
  • Width: 350 mm
  • Depth: 220 mm
• Water flow rate: 4 liters/min
• Alternative apparatus with similar conditions is acceptable.

Test Specimens (Clause 4)

• Minimum 5 specimens required for testing.

Rounding Off (General Clause)

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

Summary Table

flowchart LR
    A[Test Specimens] --> B[Conditioning]
    B --> C{Oven}
    C -->|145-150°C| D[Specimens]
    B --> E{Low Temp Bath}
    E -->|15±5°C, 4 L/min| D

This setup ensures consistent and reproducible test conditions per IS 13630 Part 5.

IS 13630 Part 5: Test Procedures - Key Specifications & Guidelines

1. Test Specimens:

• Minimum 5 specimens required for testing.

2. Oven Conditions:

• Oven temperature: 145°C to 150°C (Clause 3.2).

3. Examination Procedure (Clause 5.5):

• Inspect specimens visually from 25-30 cm distance.
• Illumination: approx. 300 lux.
• Use 1% aqueous methylene blue stain with wetting agent on glazed surfaces.
• After 1 minute, wipe stain with damp cloth to reveal defects.

4. Test Report Must Include:

• Description of tiles.
• Water absorption coefficient.
• Type of test (with/without immersion).
• Number of specimens with visible defects.

5. Rounding Off Results:

• Follow IS 2:1960 rules.
• Retain significant figures same as specified values.

Summary Table: Test Specimen & Oven Conditions

flowchart TD
    A[Test Specimens (≥5)] --> B[Oven Conditioning (145-150°C)]
    B --> C[Visual Examination]
    C --> D[Apply Stain (1% Methylene Blue)]
    D --> E[Wait 1 min & Wipe]
    E --> F[Record Defects]
    F --> G[Prepare Test Report]

This ensures consistent, standardized testing per IS 13630 Part 5.

IS 13630 Part 5: Examination of Test Specimens - Key Points

Test Specimens

• Minimum number: 5 specimens.
• Specimens must be defect-free before testing.

Examination Conditions (Clause 5.5)

• Viewing distance: 25–30 cm.
• Illumination: approx. 300 lux.
• Use naked eye (spectacles allowed if normally worn).
• To detect defects, apply 1% aqueous methylene blue solution with wetting agent on glazed surfaces.
• After 1 minute, wipe off stain with a damp cloth.

Oven Specification (Clause 3.2)

• Oven temperature: 145°C to 150°C.

Test Report Must Include:

• Description of tiles.
• Water absorption coefficient.
• Type of test (immersion or no immersion).
• Number of specimens with visible defects.

Rounding Off (IS 2:1960)

• Final test values rounded to same significant figures as specified values.

Summary Table: Examination Procedure

flowchart TD
    A[Test Specimens (≥5)] --> B[Pretest Defect Check]
    B --> C[Apply Methylene Blue Solution]
    C --> D[Wait 1 min]
    D --> E[Wipe Off Stain]
    E --> F[Examine under 300 lux, 25-30 cm]
    F --> G[Record Visible Defects]
    G --> H[Prepare Test Report]

This ensures a standardized and reliable visual inspection per IS 13630 Part 5.

IS 13630 Part 5 – Number of Thermal Cycles for Thermal Shock Testing

Key Specifications:

• Temperature Range:
  • Low temperature: ~15°C (cold water)
  • High temperature: 145°C to 150°C (oven)
• Cycle Duration:
  • 5 minutes at low temperature
  • ~20 minutes at high temperature until uniform temperature is reached
• Number of Cycles:
  • 10 cycles of alternating between low and high temperatures
• Specimens:
  • Minimum of 5 test specimens

Procedure Summary:

1. Keep specimens at low temperature for 5 minutes.
2. Transfer immediately to oven at 145-150°C for ~20 minutes.
3. Transfer back to low temperature.
4. Repeat steps 1-3 for 10 cycles.

Reference Standard:

• ISO 10545-9:2004 for resistance to thermal shock of ceramic tiles.

Table: Thermal Cycle Parameters

flowchart LR
    A[Low Temp ~15°C (5 min)] --> B[High Temp 145-150°C (~20 min)]
    B --> A
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#ff9,stroke:#333,stroke-width:2px

This cycle repeated 10 times evaluates the tile's resistance to thermal shock.

Criteria for Acceptance — IS 13630 Part 5 (Ceramic Tiles)

Key Points:

• Sampling & Acceptance: Based on ISO 10545-1 : 1995; final test values must be rounded per IS 2:1960 rules.
• Test Specimens: Minimum 5 specimens required.
• Examination (Clause 5.5):
  • Inspect specimens visually at 25-30 cm distance under ~300 lux illumination.
  • Use a 1% methylene blue stain to detect surface defects; stain for 1 min, then wipe.
• Test Report Must Include:
  • Tile description
  • Water absorption coefficient
  • Test type (with/without immersion)
  • Number of specimens with visible defects

Rounding Off Values (IS 2:1960)

Visual Examination Setup

flowchart LR
    A[Tile Specimen] --> B[Illuminate @ 300 lux]
    B --> C[View @ 25-30 cm]
    C --> D[Apply 1% Methylene Blue]
    D --> E[Wait 1 min]
    E --> F[Wipe & Inspect for defects]

Summary: Acceptance depends on defect visibility after staining, water absorption, and compliance with test conditions. Use minimum 5 specimens and follow strict visual and measurement protocols.

IS 13630 Part 5: Test Report Key Points

• Test Specimens: Minimum of 5 specimens to be tested.

• Oven Conditions: Test specimens dried in an oven capable of maintaining 145°C to 150°C.

• Examination of Specimens (Clause 5.5):

  • Visual inspection at 25-30 cm distance under ~300 lux illumination.
  • Use 1% aqueous methylene blue solution with wetting agent to highlight defects.
  • After 1 minute, wipe stain off with damp cloth.

• Rounding Off Results: Follow IS 2:1960 rules; retain significant digits as per specified values.

Test Report Must Include:

• a) Description of tiles.
• b) Water absorption coefficient.
• c) Type of test (with/without immersion).
• d) Number of specimens with visible defects.

Summary Table for Test Report Contents

flowchart TD
    A[Test Specimens (≥5)] --> B[Oven Drying (145-150°C)]
    B --> C[Visual Inspection]
    C --> D[Apply Methylene Blue]
    D --> E[Wipe After 1 min]
    E --> F[Record Visible Defects]
    F --> G[Prepare Test Report]
    G --> H[Include: Description, Absorption, Test Type, Defects]

This concise structure ensures compliance and clarity in reporting test results per IS 13630 Part 5.