Ceramic Tiles-Methods of the test, Sampling and Basis of Acceptance, Part 2: Determination of water absorption (see IS 13630: Parts 1 to 15)

IS 13630 Part 2: Scope Summary

IS 13630 Part 2 primarily deals with testing and analysis methods for structural steel, focusing on ensuring compliance with specified standards.

Key Points on Scope:

• Applies to steel materials and components used in construction.
• Covers testing procedures, including mechanical and chemical tests.
• Specifies rounding off rules for test results as per IS 2:1960:
  • Final values (observed or calculated) must be rounded off to the same number of significant digits as the specified values.

Important Specification:

IS 2:1960 Rounding Rule (Summary):

• If the digit to be dropped is >5, increase the last retained digit by 1.
• If the digit is <5, leave the last retained digit as is.
• If the digit is exactly 5, round to the nearest even number.

flowchart TD
    A[Test/Analysis Result] --> B{Round off?}
    B -- Yes --> C[Apply IS 2:1960 Rules]
    B -- No --> D[Use raw value]
    C --> E[Retain significant figures as per standard]

For detailed formulas and tables, refer to the respective testing clauses in IS 13630 Part 2.

IS 13630 Part 2 - Definitions (Clause 2.1)

• This clause establishes that all definitions used in the standard are as per ISO 13006:1998 for ceramic tiles, covering:

  • Classification of tiles
  • Characteristics (e.g., dimensions, water absorption)
  • Marking and terminology

• Rounding Off Rules (IS 2:1960):

  • Test or calculated values must be rounded to the same number of significant figures as specified.
  • Ensures consistency and clarity in reporting results.

Key Points:

No specific formulas or tables are given in this clause; it mainly sets the framework for terminology and data precision.

flowchart TD
    A[IS 13630 Part 2] --> B[Definitions as per ISO 13006]
    A --> C[Rounding off per IS 2:1960]
    B --> D[Tile Classification]
    B --> E[Tile Characteristics]
    C --> F[Consistent significant figures]

IS 13630 Part 2: Apparatus and Equipment Key Points

• Heating Apparatus (Clause 3.2):

  • Must be made of inert materials (e.g., glass, stainless steel) to avoid chemical interaction during boiling.
  • Designed to maintain uniform heating and withstand test conditions.

• Wire Loop, Halter, Basket (Clause 3.8):

  • Should support specimens submerged in water for suspended mass measurements.
  • Made of corrosion-resistant wire (e.g., stainless steel) to avoid mass change.

• Rounding Off (Clause 4):

  • Final test values must be rounded per IS 2:1960 rules.
  • Retain the same number of significant digits as specified in the standard.

Typical Specifications Summary

Note: For precise dimensions or further details, refer to IS 13630 Part 2 annexures or relevant referenced standards.

flowchart LR
    A[Heating Apparatus] --> B[Inert Material]
    A --> C[Uniform Heating]
    D[Wire Loop/Basket] --> E[Corrosion Resistant]
    D --> F[Supports Specimens Underwater]

This ensures accurate and reliable test results per IS 13630 Part 2 requirements.

IS 13630 Part 2: Test Specimens - Key Points

1. Test Specimen Preparation (Clause 4.3)

• If individual tile mass < 50 g, combine tiles to get 50–100 g per test specimen.

2. Suspended Weight Measurement (Clause 5.2)

• After water impregnation, measure mass ( m_3 ) of specimen suspended in water.
• Use wire loop, halter, or basket (Clause 3.8) suspended from balance arm.
• Counterbalance with empty wire loop/halter/basket immersed at same depth.
• Accuracy: nearest 0.01 g.

3. Expression of Results (Clause 6.3)

Test report must include:

• Description of tiles.
• Water absorption and bulk density of each tile.
• Average water absorption and bulk density.

Formula for Bulk Density and Water Absorption (from general knowledge):

[ \text{Bulk Density} = \frac{\text{Mass of dry specimen}}{\text{Volume of specimen}} \quad \left(\text{g/cm}^3\right) ]

[ \text{Water Absorption (%)} = \frac{m_2 - m_1}{m_1} \times 100 ]

where:

• ( m_1 ) = dry mass of specimen
• ( m_2 ) = mass after water immersion (saturated surface dry)

Summary Diagram of Weighing Setup

graph LR
A[Balance Arm] --> B[Wire Loop / Halter / Basket]
B --> C[Test Specimen suspended in water]
D[Counterbalance with empty loop immersed] --> A

Note: Always ensure specimens are fully saturated and weighed under identical conditions for accuracy.

IS 13630 Part 2 — Test Methods: Key Specifications

Test Report Requirements (Clause 6.3)

The test report for tiles must include:

• Description of tiles (type, size, grade)
• Water Absorption and Bulk Density for each individual tile
• Average Water Absorption and Bulk Density of the tested batch

Test Specimen Handling (Clause 3.8)

• Use Wire Loop, Halter, or Basket to support specimens underwater for suspended mass measurements.

Rounding Off (General Clause)

• Final test values should be rounded off as per IS 2:1960 rules.
• Maintain the same number of significant digits as specified in the standard.

Typical Test Parameters & Formulas

Summary Diagram: Test Report Content

graph TD
  A[Test Report] --> B[Tile Description]
  A --> C[Water Absorption (Individual)]
  A --> D[Bulk Density (Individual)]
  A --> E[Average Water Absorption]
  A --> F[Average Bulk Density]

For detailed procedural steps, refer to the full IS 13630 Part 2 document and IS 2:1960 for rounding rules.

IS 13630 Part 2: Expression of Results - Key Points

• Rounding Off (Clause 6.1.2 & IS 2:1960):

  • Results must be given to 1 decimal place.
  • Final values (observed/calculated) are rounded per IS 2:1960 rules.
  • Retain the same number of significant places as specified in the standard.

• Mass Measurement Accuracy (Clause 5.1.3 & Table 1):
  Accuracy depends on tile mass as follows:

• Suspended Weight (Clause 5.2):
  • Measure mass suspended in water to nearest 0.01 g.
  • Use wire loop/halter/basket, counterbalance before weighing.

Summary Formula for Rounding:

If x = measured/calculated value, and d = decimal places required (usually 1), then:

[ x_{rounded} = \text{round}(x, d) ]

This ensures consistent precision and reliability in test results reporting.

IS 13630 Part 2 - Clause 6.3: Test Report Specifications

The test report for tiles must include:

• Description of the tiles: Type, size, and relevant identification.
• Water absorption and bulk density of each individual tile tested.
• Average water absorption and bulk density calculated from all tested tiles.

Key Measurement Accuracy (from Clause 5.1.3, Table 1)

Additional Notes:

• Final values should be rounded per IS 2:1960 rules.
• Use wire loops or baskets for suspended mass measurements under water (Clause 3.8).
• Bulk density and water absorption are critical for quality control and durability assessment.

flowchart TD
    A[Test Tiles] --> B[Measure Individual Water Absorption & Bulk Density]
    B --> C[Record Each Measurement]
    C --> D[Calculate Average Values]
    D --> E[Prepare Test Report]
    E --> F[Include Tile Description, Individual & Average Values]

This ensures traceability and compliance with IS 13630 Part 2 standards.