Silica-asbestos-cement Flat Sheets

IS 13000: Scope Key Points and Specifications

• Scope: Specifies requirements for silica-asbestos-cement flat sheets, including dimensions, density, and quality.

Key Specifications:

Notes:

• Dimensions can be varied by mutual agreement.
• Cement grades referenced: IS 8112:1989 and IS 12269:1987.

Table 2 Extract (Nominal Dimensions)

flowchart TD
    A[Start: Sheet Manufacture] --> B[Select Nominal Dimensions]
    B --> C{Width?}
    C -->|1200 mm| D[Lengths: 600,1200,1800,2400,3000 mm]
    C -->|1220 mm| E[Lengths: 610,1220,1830,2440,3050 mm]
    D & E --> F[

Key Referenced Indian Standards in IS 13000 (Silica-Asbestos-Cement Flat Sheets)

IS 13000 refers to several important Indian Standards as adjuncts, mainly related to cement types, asbestos cement products, and safety guidelines:

Measurement Specification (Clause 7.1)

• Measurement Method: Take 3 measurements at one end cover width, approx. 20 mm from the edge.
• Gauge: Flat anvil diameter ≥ 19 mm, accuracy 0.1 mm.
• Result: Average of 3 measurements should match nominal thickness ± tolerance.

Notes on Usage

• The standard adopts IS 2:1960 for rounding off numerical values.
• Safety and handling guidelines are detailed in IS 11769 and IS 12081.
• Cement grades specified (IS 269, IS 8112, IS 12269) ensure compatibility with cement used in asbestos-cement sheets.

flowchart LR
    A[IS 13000 Standard] --> B[Referenced IS Codes]
    B --> C[IS 269, 8112, 12269 - Cement Grades]
    B --> D[IS 5913, 7639 - Sampling & Testing]
    B --> E[IS 11769, 12081 - Safety & Warning Signs]

IS 13000: Key Material Specifications for Silica-Asbestos-Cement Flat Sheets

1. Nominal Dimensions of Sheets (Clause 7.2, Table 2)

• Custom sizes allowed by mutual agreement.

2. Classification by Bending Stress & Density (Clause 5.1, Table 1)

• Use lower bending stress when fibre direction is unclear.

3. Density Measurement (Clause 8.6)

• Density tested per IS 5913:1989.
• Minimum density as per Table 1 above.

4. Thickness Measurement (Clause 7.1)

• Measure 3 points at 20 mm from edge with a flat anvil gauge (≥19 mm diameter).
• Average thickness must meet nominal value ± tolerance.

Summary Diagram: Material Properties

flowchart TD
    A[Silica-Asbestos-Cement Sheets] --> B[Dimensions]
    B -->|Length| C[600 to 3050 mm]
    B -->|Width| D[1200 or 1220 mm]
    A --> E[Classification]
    E --> F[Class I: Bending Stress 13/16 N/mm², Density ≥ 2.0 g/cm³]
    E --> G[Class II: Bending Stress 20/28 N/mm², Density ≥ 2.16 g/cm³]
    A --> H[Density Test per IS 5913:1989]
    A --> I[Thickness Measurement per Clause 7.1]

This concise summary covers essential material specs, dimensional tables, and testing requirements from IS

IS 13000: Colouring Matter in Silica-Asbestos-Cement Sheets

Key Points from IS 13000:

• Colouring Matter:
  • Pigments can be added in the composition or as surface coatings.
  • Pigments must be permanent in colour and comply with relevant IS standards.
  • Refer IS 5913:1989 for testing colour and staining power of pigments.

Material Composition (Clause 3.1):

• Cement: OPC (IS 269), PPC (IS 1489), or Blast Furnace Slag Cement (IS 455).
• Silica chemically combined with asbestos fibers.
• Compatible pozzolanic materials, fillers, and pigments allowed.

Classification & Mechanical Properties (Table 1):

• Lower bending stress value applies if fibre direction is unclear.
• Density measured as per IS 5913:1989.

Summary:

• Use permanent pigments conforming to IS standards.
• Ensure density ≥ 2.0 g/cm³ (Class I) or ≥ 2.16 g/cm³ (Class II).
• Bending stress varies with fibre orientation; always check both directions.

flowchart LR
    A[Raw Materials] --> B[Cement + Silica + Asbestos Fibres]
    B --> C[Add Pigments (Permanent Colour)]
    C --> D[Sheet Formation]
    D --> E[Testing: Density & Bending Stress]
    E --> F{Classify Sheet}
    F -->|Class I| G[Density ≥ 2.0, Bending Stress ≥ 13/16 N/mm²]
    F -->|Class II| H[Density ≥ 2.16, Bending Stress ≥ 20/28 N/mm²]

For detailed pigment testing, consult IS 5913:1989.

IS 13000: Classification of Silica-Asbestos-Cement Flat Sheets

1. Classification (Clause 5.1 & Table 1)

Sheets are classified into Class I and Class II based on minimum bending stress and density:

• Note: If fibre direction is unclear, the lower bending stress value must exceed the Class I parallel value (13 N/mm²), and the higher must not be less than the Class I right-angle value (16 N/mm²).

2. Density Measurement (Clause 8.6)

• Density must be tested as per IS 5913:1989.
• Must meet or exceed values in Table 1 for classification.

3. Nominal Dimensions (Clause 7.2 & Table 2)

• Other sizes may be supplied by mutual agreement.

Summary:

• Class I: Lower bending stress & density (13/16 N/mm²; 2.0 g/cm³)
• Class II: Higher bending stress & density (20/28 N/mm²; 2.16 g/cm³)
• Follow IS 5913 for density testing.
• Standard sizes as per

IS 13000: General Appearance and Finish — Key Points & Tables

Clause 6.1: General Appearance

• Finished sheets must be free from visible defects impairing appearance or serviceability.
• Surface: Uniform texture, with at least one smooth surface.
• Shape: Flat, rectangular, with neatly trimmed straight edges.
• Corners: Square.

Dimensions & Classification

• Bending stress values depend on fibre orientation.
• Density measured as per IS 5913:1989.

Nominal Dimensions (mm)

Summary

• Appearance: Uniform, smooth, defect-free.
• Shape: Flat, rectangular, square corners.
• Mechanical: Classified by bending stress & density.
• Dimensions: Standard nominal sizes with options by agreement.

flowchart TD
    A[Finished Sheet] --> B{Appearance}
    B --> C[Uniform Texture]
    B --> D[Smooth Surface]
    B --> E[No Visible Defects]
    A --> F{Shape}
    F --> G[Flat & Rectangular]
    F --> H[Straight Edges]
    F --> I[Square Corners]
    A --> J{Classification}
    J --> K[Bending Stress]
    J --> L[Density]
    A --> M{

IS 13000: Dimensions and Tolerances Summary

1. Tolerance on Thickness (Clause 7.3)

• For thickness 3 mm to 5 mm:
  [ \pm 0.5 \text{ mm} ]
• For thickness 6 mm and above:
  [ +0.1 \times e \text{ mm} \quad (e = \text{nominal thickness}) ]
• Max thickness variation within a sheet:
  [ \leq 10% \text{ of max measured thickness} ]

2. Tolerance on Length and Width (Clause 7.4)

• Specified tolerances depend on nominal dimensions (refer IS 13000 Table, typically ± specified mm based on size).

3. Tolerance on Shape (Clause 7.5)

• Straightness of edges (Clause 7.5.1):
  [ \leq 2 \text{ mm per meter length or width} ]

Quick Reference Table for Thickness Tolerance

flowchart LR
    A[Nominal Thickness] -->|3-5 mm| B[±0.5 mm]
    A -->|≥6 mm| C[+0.1 × e mm]
    D[Thickness Variation] --> E[≤ 10% of max thickness]
    F[Edge Straightness] --> G[≤ 2 mm/m length or width]

This ensures dimensional accuracy and quality control for steel sheets per IS 13000.

IS 13000: Physical and Mechanical Properties of Silica-Asbestos-Cement Sheets

1. Density (Clause 8.6)

• Density must comply with Table 1 values.
• Tested as per IS 5913:1989.
• Minimum density for classification is:

2. Bending Stress (Clause 8.5, Table 1)

• Determines sheet class.
• Values are minimum bending stresses (N/mm²) in two directions:

Note: If fibre direction is unclear, the lower value must exceed the parallel value, and the higher value must not be less than the right-angle value.

3. Nominal Dimensions (Clause 7.2, Table 2)

Custom sizes allowed by mutual agreement.

Summary Table:

This classification ensures mechanical strength and durability of asbestos-cement sheets per IS 13000.

IS 13000: Sampling and Criteria for Conformity

Key Points from Clause 9 (Sampling and Criteria for Conformity):

• Sampling & Inspection: As per IS 7639:1975 (Methods of sampling asbestos cement products).
• Inspection Lot Size:
  • Maximum: 3,000 sheets
  • Minimum: 400 sheets
• Sampling and acceptance criteria follow IS 7639 unless otherwise agreed between manufacturer and purchaser.

Density Measurement (Clause 8.6):

• Density tests per IS 5913:1989.
• Density values must meet or exceed those in Table I of IS 13000 (not provided here, refer to IS 13000 Table I for exact values).
• Density + bending stress determine sheet classification.

Thickness Measurement (Clause 7.1):

• Take 3 measurements at one end cover width, ~20 mm from edge.
• Use gauge with flat anvil ≥19 mm diameter, accuracy 0.1 mm.
• Average thickness must meet nominal thickness and tolerance (per Clauses 7.1 & 7.3).

Summary Table for Sampling (IS 13000 & IS 7639):

References for Related Standards:

• IS 7639:1975 – Sampling methods for asbestos cement products.
• IS 5913:1989 – Density measurement methods.
• IS 8112:1989 & IS 12269:1987 – Cement grades referenced.

flowchart LR
    A[Inspection Lot] -->|400 to 3000 sheets| B[Sampling per IS 7639]
    B --> C[Take Samples]
    C --> D[Density Test (IS 5913)]
    C --> E[Thickness Measurement]
    D & E --> F[Check Against Table I & Tolerances]
    F --> G{Conforms?}
    G -->|Yes| H[Accept Lot]
    G -->|No| I[Reject Lot]

IS 13000: Manufacturer's Certificate & Key Specifications

Manufacturer's Certificate (Clause 10.1)

• Manufacturer must ensure sheets conform to IS 13000 standards.
• If requested, a certificate stating the class of the sheet must be furnished to purchaser or representative.
• Certificate confirms compliance with all relevant requirements.

Sampling & Inspection (Clause 9.1)

• Follow IS 7639:1975 for sampling and inspection.
• Inspection lot sizes:
  • Maximum: 3,000 sheets
  • Minimum: 400 sheets
• Sampling plan ensures quality control before certification.

Nominal Dimensions of Asbestos Cement Sheets (Clause 7.2)

• Custom sizes allowed by mutual agreement.

Summary:

• Manufacturer's Certificate certifies compliance & sheet class.
• Sampling per IS 7639 with lot sizes 400–3000 sheets.
• Standard sheet sizes as per Table 2; custom sizes possible.

flowchart TD
    A[Manufacturer] --> B[Inspection per IS 7639]
    B --> C{Sheets conform to IS 13000?}
    C -- Yes --> D[Issue Manufacturer's Certificate]
    C -- No --> E[Reject or Rework Sheets]
    D --> F[Supply to Purchaser]

This ensures traceability and quality assurance in asbestos cement sheet supply.

IS 13000 - Marking of Asbestos Cement Sheets

Key Marking Requirements (Clause 11.1 & 11.2)

Each sheet shall be legibly and indelibly marked with:

• Class of sheet (refer Clause 5)
• Source of manufacture
• Year and date of manufacture
• Nominal thickness (in bold letters)
• Pictorial warning sign as per IS 12081 (Part 2):1987
• Optionally, Standard Mark (Clause 11.2)

Nominal Dimensions (Clause 7.2)

Note: Custom sizes may be agreed upon between purchaser and manufacturer.

Additional Notes

• Marking must be indelible and legible throughout the sheet's service life.
• Thickness marking should be bold for easy identification.
• Warning signs are mandatory for safety compliance.

flowchart LR
    A[Sheet] --> B[Mark Class]
    A --> C[Mark Manufacturer]
    A --> D[Mark Date & Year]
    A --> E[Mark Thickness (bold)]
    A --> F[Mark Warning Sign (IS 12081)]
    A --> G[Optional: Standard Mark]

This ensures traceability, safety, and compliance with IS 13000.

IS 13000: Safety Rules Sheet for Silica-Asbestos-Cement Sheets

Key Points from IS 13000 & Related IS 11769 (Part 1):

• Clause 12.1:
  Every delivery of silica-asbestos-cement flat sheets must be accompanied by a Safety Rules Sheet as per IS 11769 (Part 1): 1987.
  This sheet outlines safe handling, storage, and installation practices to minimize health hazards.

• Marking on Sheets (Clause 11.1):
  Each sheet shall be marked with:

  • Class of sheet
  • Manufacturer's identification
  • Date/year of manufacture
  • Nominal thickness (bold)
  • Pictorial warning sign (per IS 12081 Part 2:1987)

Nominal Dimensions Table (Clause 7.2):

Note: Custom sizes possible by mutual agreement.

Summary of Safety Rules Sheet Content (IS 11769 Part 1):

• Avoid dry cutting or breaking to reduce dust.
• Use wet methods or dust extraction.
• Wear approved respiratory protection.
• Store sheets flat and avoid damage.
• Dispose of waste safely as hazardous material.

flowchart TD
    A[Delivery of Sheets] --> B[Safety Rules Sheet Included]
    B --> C[Safe Handling Instructions]
    B --> D[Health Hazard Warnings]
    B --> E[Storage & Disposal Guidelines]

Ensure compliance with IS 11769 for detailed safety instructions accompanying asbestos-cement sheets.

IS 13000 - List of Referenced Indian Standards (Annex A)

This standard references key IS codes essential for silica-asbestos-cement flat sheets:

Key Specifications from IS 13000:

• Thickness Measurement (Clause 7.1):
  • Take 3 measurements at one end cover width, ~20 mm from edge.
  • Use a gauge with a flat anvil ≥19 mm diameter, accuracy 0.1 mm.
  • Average must meet nominal thickness and tolerances per clauses 7.1 & 7.3.

Notes on Usage:

• Final test values must be rounded per IS 2:1960 (rounding rules).
• The standard aligns with ISO 396/2:1980 for fibre reinforced cement products.

flowchart LR
    A[IS 13000 Standard] --> B[Annex A: Referenced IS Codes]
    B --> C[Portland Cement Specs (IS 269, 8112, 12269)]
    B --> D[Sampling & Testing (IS 5913, 7639)]
    B --> E[Safety Guidelines (IS 11769, 12081)]
    A --> F[Thickness Measurement Procedure]

For detailed testing and safety, refer to the respective IS codes listed above.

IS 13000: Technical Committee Composition - Key Points

1. Committee Composition (Annex B):

• Chairman: Dr. H.C. Visvesvaraya (University of Roorkee)
• Members: Representatives from diverse sectors including:
  • Cement industries (Orissa Cement Ltd, The Associated Cement Companies Ltd)
  • Government departments (CPWD, Central Water Commission)
  • Research institutions (CSIR Structural Engineering Research Centre, Central Building Research Institute)
  • Testing & Standards organizations (National Test House, Research Designs & Standards Organization)
  • Industry bodies (Builders Association of India, Larsen & Toubro Ltd)
  • Others: Geological Survey of India, Ministry of Transport, Army Headquarters, etc.

2. Purpose:

• To formulate and revise standards related to silica-asbestos-cement flat sheets.
• Ensures coordination with international standards (e.g., ISO 396/2:1980).

3. Related IS Codes:

• IS 269, 455, 1489, 5913, 7639, 11769, 12081, 8112, 12269 (cement and asbestos product standards).

Summary Table: Technical Committee Composition

Notes:

• The committee ensures comprehensive expertise covering manufacturing, testing, research, and regulatory aspects.
• The committee's work supports standardization, safety, and quality assurance in asbestos cement products.

graph TD
  A[Chairman: Dr. H.C. Visvesvaraya] --> B[Cement Industry]
  A --> C[Govt. Departments]
  A --> D[Research Institutes]
  A --> E[Testing & Standards]
  A --> F[Industry Bodies]
  A --> G[