burnt clay soling bricks - Specification

IS 5779: Scope & Key Specifications for Soling Bricks

• Scope: Covers standard sizes, dimensions, and tolerances for soling bricks used in construction.

• Rounding Off: Final test or analysis values must be rounded per IS 2-1960, retaining the same significant figures as the specified standard values.

• Definitions: Follow definitions as per IS 2248-1981 (Burnt Clay Building Bricks).

Standard Dimensions of Soling Bricks (Clause 5.1)

Notes:

• These dimensions ensure uniformity and compatibility in construction.
• Tolerances on these dimensions are as per the standard but not explicitly provided here.

flowchart LR
    A[IS 5779 Standard] --> B[Scope: Soling Bricks]
    B --> C[Dimensions & Tolerances]
    C --> D[Length: 190 mm]
    C --> E[Width: 90 mm]
    C --> F[Depth: 40 or 90 mm]
    A --> G[Rounding as per IS 2-1960]
    A --> H[Definitions per IS 2248-1981]

This ensures soling bricks meet quality and dimensional standards for effective use in foundations and flooring.

IS 5779 - Definitions and Key Specifications

• Definitions: As per Clause 2.1, all definitions refer to IS 2248:1981 (Burnt Clay Building Bricks).

• Rounding Off: According to Clause 0.4, test or analysis results must be rounded per IS 2:1960, maintaining the same significant figures as specified values.

• Standard Dimensions for Soling Bricks (Clause 5.1):

• Tolerance: Dimensions should conform within tolerances specified in the standard (refer to Clause 5 for detailed tolerances).

Summary Diagram of Brick Dimensions

graph TD
A[Brick] --> B[Length: 190 mm]
A --> C[Width: 90 mm]
A --> D[Depth: 40 mm or 90 mm]

For detailed definitions, refer to IS 2248:1981.

IS 5779: Materials and Manufacture Key Points

1. Water Absorption (Clause 6.2)

• Maximum water absorption by weight after 24 hours immersion in cold water ≤ 20%.
• Test as per IS 3495 (Part 2) - 1976.

2. Measurement and Tolerances (Fig. 1)

• Length, width, and height of bricks measured as per IS 5779.
• Tolerances are specified for soling bricks dimensions (refer to Fig. 1 in the code).

3. Marking (Clause 8.1.1)

• Bricks may carry the ISI Certification Mark.
• ISI Mark ensures compliance with quality, inspection, and testing standards.

4. Rounding Off (Clause 0.4)

• Final test or analysis values rounded off per IS 2-1960.
• Retain the same significant figures as the specified value.

Summary Table: Water Absorption Limit

Notes:

• ISI Mark is a quality assurance symbol governed by Indian Standards Institution.
• For detailed dimensional tolerances and manufacturing specifics, refer to IS 5779 Fig. 1 and related clauses.

flowchart TD
    A[Raw Clay] --> B[Manufacturing Process]
    B --> C[Forming Bricks]
    C --> D[Drying]
    D --> E[Firing]
    E --> F[Finished Brick]
    F --> G[Testing: Water Absorption IS 3495]
    G --> H{Water Absorption ≤ 20%?}
    H -- Yes --> I[Mark with ISI Certification]
    H -- No --> J[Reject or Reprocess]

For full details, consult the IS 5779 document and IS 3495 for test procedures.

IS 5779: General Quality - Key Points & Specifications

1. Rounding Off (Clause 0.4)

• Final test/analysis values must be rounded as per IS:2-1960.
• Number of significant digits in results = number in the specified standard value.

2. ISI Certification Mark (Clause 8.1.1)

• Bricks may carry the ISI mark, ensuring compliance with IS 5779 under strict inspection & quality control.
• ISI mark signifies continuous conformity checks by ISI.

3. Measurement of Dimensions (Fig. 1)

• Length, width, and height of bricks are measured to ensure tolerance compliance.
• Tolerances for soling bricks are specified in the standard (refer Fig. 1 in IS 5779).

Summary Table: Measurement Parameters for Soling Bricks

Notes:

• Quality control includes dimensional checks, material strength, and visual defects.
• ISI mark is a quality assurance symbol under Indian law.

flowchart TD
    A[Brick Production] --> B[Inspection & Testing]
    B --> C{Meets IS 5779?}
    C -->|Yes| D[ISI Certification Mark]
    C -->|No| E[Reject or Reprocess]

For detailed dimensional tolerances and quality parameters, refer to the full IS 5779 standard document.

IS 5779 - Dimensions and Tolerances for Soling Bricks

1. Standard Dimensions (Clause 5.1)

2. Tolerances on Dimensions (Clause 5.2)

*Note: The length tolerance values given (372 to 388 cm) appear inconsistent with standard brick sizes; likely a typographical error in the clause. The expected length tolerance is ±8 mm around 190 mm.

3. Additional Specifications

• Bricks must be free from cracks, flaws, and free lime nodules (Clause 4.1).
• Faces should be plane and rectangular with straight right-angle edges.
• Dimension rounding should follow IS:2-1960 for compliance checking.

Summary Table for Quick Reference

flowchart TD
    A[Start: Brick Manufacture] --> B[Check Dimensions]
    B --> C{Dimensions within tolerance?}
    C -- Yes --> D[Check Surface Quality]
    C -- No --> E[Reject Brick]
    D --> F{Free from cracks/flaws?}
    F

IS 5779: Physical Properties of Soling Bricks

Key Specifications & Formulas

• Dimensions (Clause 5.1):

• Measurement Procedure (Clause 5.2.1):

  • Select 20 or more bricks randomly.
  • Remove blisters, loose particles.
  • Arrange bricks in a straight line in contact.
  • Measure overall length with a steel tape in one stretch.
  • If impractical, divide into rows of 10 bricks and measure separately.
  • Sum all measurements to get total length.

• Water Absorption (Clause 6.2):

  • After 24 hours immersion in cold water, water absorption by weight ≤ 20%.
  • Test as per IS: 3495 (Part 2)-1976.

• Rounding Off (Clause 6.0.4):

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

Summary Table for Physical Properties

flowchart LR
  A[Select 20+ bricks] --> B[Remove blisters & loose particles]
  B --> C[Arrange in straight line]
  C --> D[Measure overall length with steel tape]
  D --> E{Impractical?}
  E -- Yes --> F[Divide into rows of 10 bricks]
  F --> G[Measure each row separately]
  G --> H[Sum all measurements]
  E -- No --> H

This ensures accurate dimension verification per IS 5779.

Sampling and Criterion for Conformity - IS 5779

1. Sampling Procedure (Clause 7.1):

• Sampling of bricks shall follow IS 5454:1978.
• Select 20 or more whole bricks randomly from the batch depending on stack size (Clause 5.2.1).
• Remove blisters, loose clay, and projections before testing.

2. Measurement Method (Clause 5.2.1):

• Arrange bricks in a straight line, in contact, on a level surface (see Fig. 1A-C in IS 5779).
• Measure overall length with a steel tape or inextensible measure in one stretch (no repeated short measures).
• If impractical, divide into rows of 10 bricks and measure each separately to the nearest mm, then sum.

3. Rounding Off Results (Clause 0.4):

• Round off test results as per IS 2:1960, keeping the same number of significant digits as specified values.

4. Efflorescence Limit (Clause 6.3):

• Efflorescence rating shall not exceed "slight" as per IS 3495 (Part 3)-1976.

Summary Table: Sampling & Measurement

flowchart LR
    A[Select bricks as per IS 5454] --> B[Remove defects]
    B --> C[Arrange bricks in a straight line]
    C --> D[Measure overall length with steel tape]
    D --> E{Is single row measurement possible?}
    E -- Yes --> F[Record length]
    E -- No --> G[Divide into rows of 10 bricks]
    G --> H[Measure each row separately]
    H --> I[Sum lengths]
    F & I -->

IS 5779 - Marking of Bricks (Clause 8.1 & 8.1.1)

• Marking Requirements:

  • Each brick shall be marked at the time of moulding with:
    • Manufacturer's identification mark or initials.
    • Type of the brick.
  • Optionally, bricks may carry the ISI Certification Mark indicating compliance with IS standards under ISI supervision.

• Purpose of ISI Mark:

  • Assurance of quality control, inspection, and testing.
  • Continuous conformity checks by ISI.

• Rounding Off Results (Clause 0.4):

  • Test results must be rounded as per IS:2-1960.
  • Number of significant digits retained should match the specified value.

Summary Table for Marking

Additional Notes:

• Marking is done during moulding.
• ISI Mark usage governed by Indian Standards Institution Certification Marks Act.
• For detailed testing methods, refer to IS test standards (compressive strength, water absorption, efflorescence).

flowchart LR
    A[Brick Moulding] --> B[Mark Manufacturer's ID & Brick Type]
    B --> C{Optional}
    C -->|Yes| D[Apply ISI Certification Mark]
    C -->|No| E[No ISI Mark]
    D & E --> F[Finished Brick]

This ensures traceability and quality assurance as per IS 5779.

IS 5779 (1986) primarily covers specifications for bricks, but packaging and storage details are not explicitly detailed in the provided clauses.

Key Points on Packaging & Storage (General Practice for Bricks per IS standards):

• Packaging:

  • Bricks should be stacked on pallets or wooden trays to prevent damage.
  • Use protective coverings (tarpaulins/plastic sheets) to avoid moisture ingress.
  • Mark bricks with ISI Certification Mark as per Clause 8.1.1 for quality assurance.

• Storage:

  • Store bricks in dry, well-ventilated areas.
  • Stack bricks in a stable manner, usually in stretcher bond pattern.
  • Avoid direct contact with soil or water to prevent moisture absorption.
  • Maximum stack height generally limited to 1.5 meters to avoid crushing.

ISI Marking:

Measurement of Brick Dimensions (for packaging tolerance):

• Length, Width, Height as per IS 2248.
• Tolerances ensure uniformity aiding in packaging efficiency.

Summary Table: Packaging & Storage Recommendations

flowchart TD
    A[Bricks Production] --> B[Mark with ISI Certification]
    B --> C[Packaging on Pallets]
    C --> D[Cover with Moisture Protection]
    D --> E[Store in Dry, Ventilated Area]
    E --> F[Stack up to 1.5 m Height]

For detailed packaging & storage, refer to IS 2212 (Code of Practice for Brickwork) and IS 2185 (Concrete Masonry Units).