Asbestos cement building boards

IS 2098: Scope - Key Specifications & Tables

• Scope: Covers asbestos cement building boards used in construction, specifying dimensions, tolerances, and quality.

Table 1: Dimensions of Asbestos Cement Building Boards (Clause 7.1)

• Note: Values not in brackets are preferred sizes.
• Boards may be supplied in other dimensions by mutual agreement.

Tolerances (Clause 7.1)

• Length and width tolerance: ± 5 mm from nominal dimensions.

General Appearance (Clause 6)

• Boards must be flat, rectangular, with smooth surface on at least one side.
• Edges must be straight, trimmed, and corners square.
• Free from visible defects affecting appearance or serviceability.

Rounding Off (IS 2:1960)

• Final measured/calculated values must be rounded off to the same significant figures as specified.

This summary ensures compliance with IS 2098 for asbestos cement boards in terms of size, tolerance, and finish.

IS 2098 Key References and Specifications

1. References

• Indian Standards listed in Annex A are essential adjuncts to IS 2098.
• Rounding off numerical values must follow IS 2:1960 rules.
• Technical committees are listed in Annex B.

2. Dimensions of Asbestos Cement Building Boards (Table 1, Clause 7.1)

• Values not in brackets are preferred sizes.
• Boards may be supplied in other dimensions by mutual agreement.

3. Tolerances (Clause 7.1)

• Length and width tolerance: ± 5 mm from nominal dimensions.

4. General Appearance (Clause 6)

• Boards must be free from visible defects.
• At least one surface must be smooth.
• Boards must be flat, rectangular, with neatly trimmed edges and square corners.

flowchart TD
    A[IS 2098 Standard] --> B[Annex A: Indian Standards]
    A --> C[Annex B: Technical Committees]
    A --> D[Table 1: Board Dimensions]
    D --> E[Class A, B, C Sizes]
    A --> F[Tolerances ±5 mm]
    A --> G[Appearance & Finish Requirements]

This summary covers critical references, dimensions, tolerances, and finish requirements per IS 2098.

IS 2098: Classification of Asbestos Cement Building Boards

Classification (Clause 5 & 7.1)

Boards are classified into Class A, B, and C, differing mainly by thickness.

• Values not in brackets are preferred sizes.
• Tolerance on length and width: ±5 mm.
• Boards must be flat, rectangular, with smooth surface and square corners.
• Custom sizes allowed by mutual agreement.

Rounding Off (IS 2:1960)

• Final test/analysis values must be rounded to the same significant digits as specified.

flowchart TD
    A[Classification] --> B[Class A: Thickness 6mm]
    A --> C[Class B: Thickness 5mm]
    A --> D[Class C: Thickness 4mm]
    B --> E[Preferred Sizes: 2440x1220, 1830x1220, 1220x1220 mm]
    C --> E
    D --> E

This classification helps in selecting boards based on thickness and size for appropriate structural or architectural use.

IS 2098: Materials and Composition - Key Specifications

1. Thickness Measurement (Clause 7.1)

• Measure thickness at 3 points near each end, 20 mm from edge.
• Use a metal plate gauge: diameter ≥ 9 mm, reading to 0.1 mm.
• Thickness must conform to nominal thickness ± tolerance (see Table 1).

2. Dimensions & Classification (Table 1, Clause 7.1)

• Values not in brackets are preferred sizes.
• Length & width tolerance: ±5 mm.

3. General Appearance (Clause 6)

• Free from visible defects.
• Uniform texture, at least one smooth surface.
• Flat, rectangular, neatly trimmed edges, square corners.

4. Related Standards

• Asbestos cement flat sheets: IS 2096:1992.
• Silica asbestos cement sheets: IS 13000:1990.

flowchart TD
    A[Material Sampling] --> B[Thickness Measurement]
    B --> C{Thickness within tolerance?}
    C -- Yes --> D[Dimension Check]
    C -- No --> E[Reject/Remake]
    D --> F{Length & Width ±5mm?}
    F -- Yes --> G[Accept Board]
    F -- No --> E

This ensures quality control per IS 2098 for asbestos cement boards.

IS 2098: Dimensions and Tolerances for Asbestos Cement Boards

Key Specifications:

• Thickness Measurement:
  Measured at 3 points near each end, ~20 mm from edge, using a metal plate gauge (diameter ≥ 9 mm, accuracy 0.1 mm).

• Thickness Tolerance (Clause 7.2):
  For thickness 3 mm to 5 mm: ± 0.5 mm

• Length & Width Tolerance (Clause 7.1):
  ± 5 mm from nominal dimensions.

Table 1: Board Dimensions (mm)

Note: Values outside brackets are preferred sizes.

Summary:

• Thickness tolerance depends on nominal thickness (e.g., ±0.5 mm for 3–5 mm thickness).
• Length and width tolerance: ±5 mm.
• Boards must be flat, rectangular, with smooth surface and square corners.

flowchart TD
    A[Measure Thickness] --> B[3 points at each end]
    B --> C[Use metal plate gauge (Ø ≥ 9 mm)]
    C --> D[Check average thickness]
    D --> E{Thickness Tolerance}
    E -->|3-5 mm| F[± 0.5 mm]
    E -->|Others| G[Refer specific tolerance]
    H[Length & Width] --> I{Tolerance ± 5 mm}

This ensures quality control per IS 2098 standards.

IS 2098: General Appearance and Finish of Asbestos Cement Boards

Key Specifications (Clause 6 & 7.1)

• Surface: At least one smooth surface, uniform texture, free from visible defects impairing appearance or serviceability.
• Shape: Flat, rectangular, neatly trimmed straight edges, and square corners.
• Dimensional Tolerances: Length & width ±5 mm from nominal sizes (see Table 1).

Table 1: Dimensions of Boards (Preferred sizes)

Note: Values in brackets are alternative sizes; preferred sizes are without brackets.

Additional Notes

• Thickness measured per Clause 8.3.
• Water absorption ≤ 40% dry weight (IS 5913).
• Boards must be marked with:
  • Class of board
  • Manufacturer ID
  • Nominal thickness
  • Warning sign per IS 12081 (Part 2)

Summary Diagram of Board Appearance Requirements

graph TD
    A[Board Surface] -->|Uniform texture| B[Smooth surface ≥ 1 side]
    A -->|No visible defects| C[Appearance & Serviceability]
    D[Board Shape] -->|Flat & Rectangular| E[Edges: Straight & Trimmed]
    D -->|Corners| F[Square]
    G[Dimensions] -->|Length & Width| H[±5 mm tolerance]

This ensures quality, dimensional accuracy, and safety marking compliance.

IS 2098: Physical and Mechanical Requirements Summary

1. Dimensions & Tolerances (Clause 7.1 & Table 1)

• Tolerance on length & width: ±5 mm from nominal.
• Thickness measured at 3 points near edges with a 9 mm diameter gauge, tolerance per Table 1.

2. Appearance & Finish (Clause 6)

• Flat, rectangular, smooth surface on at least one side.
• Neatly trimmed edges and square corners.
• Free from visible defects impairing appearance or serviceability.

3. Water Absorption (Clause 8.4)

• Max water absorption ≤ 40% of dry weight (IS 5913 test).

4. Marking & Certification (Clause 10)

• Boards must be marked with:
  • Class of board
  • Manufacturer ID
  • Nominal thickness
  • Warning sign as per IS 12081 (Part 2)
• Manufacturer to provide certificate of conformity.

Additional Notes:

• Sampling & inspection per IS 7639.
• Rounding off test results per IS 2:1960 rules.

flowchart TD
    A[Board Dimensions] --> B[Tolerances ±5mm]
    A --> C[Thickness per Table 1]
    D[Appearance] --> E[Flat, smooth surface]
    D --> F[No visible defects]
    G[Water Absorption] --> H[≤ 40% dry weight]
    I[Marking] --> J[Class, Manufacturer ID]
    I --> K[Thickness, Warning Sign]

This concise summary covers key physical and mechanical specs per IS 2098.

IS 2098: Testing Methods Summary

• Rounding Off Results:
  Follow IS 2:1960 for rounding numerical test results. Retain the same significant figures as specified in IS 2098.

• Reference Testing Standard:
  Testing methods align with IS 5913:1989 (Methods for asbestos cement products).

• Water Absorption Test (Clause 8.4):

  • Method: As per IS 5913
  • Requirement: Water absorption ≤ 40% of dry weight.

• Sampling & Inspection:

  • As per IS 7639
  • Inspection lot sizes: Min 400 sheets, Max 3000 sheets.

• Manufacturer’s Certificate & Marking (Clause 10):
  Each board must be marked on the non-weathering side with:

  • Class of board
  • Manufacturer identification
  • Nominal thickness
  • Pictorial warning (IS 12081 Part 2)

Quick Reference Table: Water Absorption Limit

flowchart TD
    A[Start Testing] --> B{Follow IS 5913 Methods?}
    B -- Yes --> C[Conduct Water Absorption Test]
    C --> D{Absorption ≤ 40%?}
    D -- Yes --> E[Pass]
    D -- No --> F[Fail]
    B -- No --> G[Revise Testing Method]

This ensures compliance with IS 2098 testing requirements.

IS 2098: Sampling and Inspection Key Points

• Sampling & Inspection Standard:
  Follow IS 7639 for sampling, inspection, and acceptance criteria of asbestos cement boards.

• Inspection Lot Size:

  • Maximum: 3,000 sheets
  • Minimum: 400 sheets

• Dimensional Tolerances (Clause 7.1):
  Length and width shall not vary more than ±5 mm from nominal sizes (see Table 1).

(Preferred sizes without brackets)

• Water Absorption (Clause 8.4):
  Tested as per IS 5913, max water absorption ≤ 40% of dry weight.

• Manufacturer's Certification (Clause 10):
  Boards must be marked with:

  • Class
  • Manufacturer ID
  • Nominal thickness
  • Warning sign per IS 12081 (Part 2)

• Rounding Off Results:
  Follow IS 2:1960 for rounding numerical test results, matching significant figures to those specified.

flowchart LR
  A[Sampling per IS 7639] --> B{Lot Size}
  B -->|Min 400 sheets| C[Inspection]
  B -->|Max 3000 sheets| C
  C --> D[Dimensional Check ±5 mm]
  C --> E[Water Absorption ≤ 40%]
  D & E --> F[Acceptance/Rejection]
  F --> G[Manufacturer's Certificate & Marking]

This ensures quality compliance and traceability of asbestos cement boards per IS 2098.

IS 2098 - Manufacturer's Certificate & Key Specifications

Manufacturer's Certificate (Clause 10)

• Manufacturer must ensure boards conform to IS 2098.
• Certificate must state:
  • Class of board (A, B, or C)
  • Source of manufacture
  • Nominal thickness
  • Pictorial warning sign per IS 12081 (Part 2)
• Each board must be stamped/marked on the non-weathering side with above info.

Key Dimensions (Table 1, Clause 7.1)

• Tolerance on length & width: ±5 mm

Other Important Specs

• Water Absorption (Clause 8.4): ≤ 40% dry weight (IS 5913 test)
• Appearance (Clause 6): Flat, rectangular, smooth surface, neat edges, square corners
• Sampling & Inspection: Per IS 7639, lot sizes 400–3000 sheets

Rounding Off (IS 2:1960)

• Final test values rounded to same decimal places as specified values.

flowchart TD
    A[Manufacturing] --> B[Quality Check per IS 2098]
    B --> C[Marking on Boards]
    C --> D[Manufacturer's Certificate]
    D --> E[Delivery to Purchaser]

This ensures traceability and compliance with IS 2098 standards.

IS 2098: Marking and Packaging Key Points

1. Marking (Clause 10)

Each asbestos cement board shall be clearly marked on the non-weathering side with:

• Class of Board (A, B, or C)
• Source of Manufacture (manufacturer's identification)
• Nominal Thickness (in mm)
• Pictorial Warning Sign as per IS 12081 (Part 2)

2. Packaging & Dimensions (Clause 7.1, Table 1)

• Values in brackets are alternate sizes; preferred sizes are without brackets.
• Length & width tolerance: ±5 mm.

3. Packaging Requirements

• Boards must be free from visible defects.
• Surfaces: uniform texture, at least one smooth face.
• Edges: neatly trimmed, straight, square corners.
• Sampling and inspection as per IS 7639.

4. Rounding Off (IS 2:1960)

• Test results must be rounded to the same significant figures as specified in IS 2098.

flowchart LR
  A[Manufactured Board] --> B{Marking on Non-weathering Side}
  B --> C[Class of Board]
  B --> D[Manufacturer ID]
  B --> E[Nominal Thickness]
  B --> F[Pictorial Warning]
  A --> G[Packaging]
  G --> H[Free from defects]
  G --> I[Uniform texture & smooth surface]
  G --> J[Trimmed edges & square corners]

This ensures compliance with IS 2098 for marking and packaging of asbestos cement boards.

IS 2098 - List of Referenced Indian Standards (Annex A)

This standard refers to key Indian Standards relevant to cement and asbestos cement products:

Notes:

• These referenced standards cover cement grades, testing methods, safety guidelines for asbestos products, and sampling procedures.
• For detailed design, testing, and certification, refer to the respective IS codes.
• BIS Certification Mark usage is governed by the BIS Act, 1986 (Clause 11.2.1).

flowchart TD
    A[IS 2098] --> B[IS 269:1989 - OPC 33 Grade]
    A --> C[IS 8041:1990 - Rapid Hardening Cement]
    A --> D[IS 8112:1989 - OPC 43 Grade]
    A --> E[IS 455:1989 - Portland Slag Cement]
    A --> F[IS 1489:1991 - Pozzolana Cement]
    A --> G[IS 11769:1987 - Asbestos Safety Guidelines]
    A --> H[IS 12081:1987 - Warning Signs]
    A --> I

IS 2098: Technical Committee Composition & Key Specifications

Technical Committee (Annex B): Cement Matrix Products Sectional Committee, CED 53

Key Points:

• Committee includes experts from government, industry, research, and manufacturing sectors.
• Alternate members are nominated for each primary member.
• BIS Director General is an ex-officio member.

Table: Dimensions of Asbestos Cement Building Boards (Clause 7.1)

• Preferred sizes are without brackets.
• Length and width tolerance: ±5 mm.

Summary Diagram of Committee Composition

graph LR
A[Chairman] --> B[Members]
B --> C[Industry Representatives]
B --> D[Research Institutes]
B --> E[Government Bodies]
B --> F[BIS Officials]

Note: For full committee details, refer Annex B of IS 2098.