Cement bonded particle boards -Specification

IS 14276: Scope - Key Specifications & Tables

This standard covers Cement Bonded Particle Boards with key physical and mechanical property requirements as below:

Table: Physical & Mechanical Properties (Summary)

Testing Conditions:

• Wet condition MOR: Specimens soaked at 27 ± 2°C for 24h.
• Accelerated Ageing: Boiled 2h, dried to ~12% moisture, then tested.
• pH Measurement: Specimens immersed in water at 27 ± 2°C for 72h, then pH measured.

Sampling:

• Three test specimens each for dry and wet conditions per IS 2380 (Part 4):1977.

Important Formulae:

• Modulus of Rupture (MOR):

[ MOR = \frac{3PL}{2bd^2} ]

Where:

• (P) = Load at failure (N)
• (L) = Span length (mm)
• (b) = Width of specimen (mm)
• (d) = Thickness of specimen (mm)

This concise scope ensures quality control for cement bonded

IS 14276: Referenced Indian Standards & Key Specifications

Referenced Standards:

• IS 707: 1976 — Definitions related to the standard.
• IS 2380 (Part 4): 1977 — Specifies test specimen dimensions for modulus tests.

Key Mechanical Properties (Table from Clause 8.5)

Testing Requirements (Clause 9.2.1(f))

• Specimens: 3 each for dry and wet conditions.
• Dimensions: As per IS 2380 (Part 4): 1977.

Summary:

• Use IS 707 for definitions.
• Mechanical properties must meet the above minimums.
• Test specimens must conform to IS 2380 (Part 4) for valid results.

flowchart TD
    A[Sample Collection] --> B[Test Specimens]
    B --> C[Dry Condition (3 specimens)]
    B --> D[Wet Condition (3 specimens)]
    C --> E[Modulus of Rupture & Elasticity Tests]
    D --> E
    E --> F[Compare with IS 14276 Requirements]

This ensures compliance with IS 14276 mechanical property requirements.

IS 14276: Key Definitions & Specifications Summary

Definitions (Clause 3.1)

• Refer primarily to IS 14276 Clause 3.1.
• For additional definitions, consult IS 707:1976.

Physical & Mechanical Properties (Table 1, Clause 10.10)

Important Notes:

• Wet Condition Testing: Specimens soaked at 27 ± 2°C for 24 h before testing MOR.
• Accelerated Ageing: Boil specimens for 2 h, dry to ~12% moisture, then test tensile strength.
• pH Testing: Specimens immersed in water at 27 ± 2°C for 72 h; measure water pH.

Modulus of Rupture & Elasticity (Clause 8.5 updated values)

IS 14276: Cement Bonded Particle Boards - Key Material Specifications

Testing Notes:

• Wet condition MOR/MOE: Specimens soaked at 27 ± 2°C for 24 h.
• Accelerated ageing: Boiling specimens for 2 h, then drying to ~12% moisture before tensile test.
• Specimen dimensions: As per IS 2380 (Part 4):1977.

flowchart TD
    A[Raw Materials] --> B[Cement Bonded Particle Board]
    B --> C{Properties Tested}
    C --> D[Density]
    C --> E[Moisture Content]
    C --> F[Water Absorption & Swelling]
    C --> G

IS 14276: Cement Bonded Particle Boards - Manufacturing Process Key Specifications

Testing Notes:

• Wet MOR: Specimens soaked at 27±2°C for 24h.
• Accelerated Ageing: Boiled 2h, dried to ~12% moisture, then tested.
• pH Test: Specimens immersed 72h at 27±2°C; water pH measured.

Reference Standards:

• Mechanical tests per IS 2380 (Part 4): 1977.
• Sampling: 3 specimens each for dry and wet conditions.

flowchart LR
    A[Raw Materials] --> B[Mixing with Cement]
    B --> C[Forming Boards]
    C --> D[Pressing & Curing]
    D --> E[Cutting & Finishing]
    E --> F[Testing (Density, MOR, MOE, etc.)]
    F --> G

IS 14276: General Requirements for Cement Bonded Particle Boards

Key Physical & Mechanical Properties (Clause 10.10, Table 1)

Important Notes:

• Wet condition tests: Specimens soaked at 27 ± 2°C for 24h (for MOR).
• Accelerated ageing: Boiled 2h, dried to ~12% moisture before tensile test.
• Sampling: 3 specimens each for dry & wet conditions as per IS 2380 (Part 4):1977.

Modulus of Rupture & Elasticity Requirements (Updated Table 1)

This summary ensures compliance with IS 14276 general requirements for cement bonded particle boards.

IS 14276: Dimensions and Tolerances for Particle Boards

Key Tolerances (Clause 7.3.1, Table 7.3)

Additional Specifications

• Uniformity: Boards must have uniform thickness and density across length and width (Clause 6.1).
• Flatness & Smoothness: All boards must be flat and smooth.
• Measurement Standards: Dimensional accuracy is verified as per IS 2380 (Part 2) 1977, covering:
  • Straightness of edges
  • Squareness of boards
  • Length, width, and thickness

Practical Notes

• Thickness tolerance depends on board thickness; for example:
  • Thickness ≤ 6 mm: ± 0.3 mm
  • Thickness > 6 mm: ± 0.5 mm
• Edge straightness and squareness are critical for proper fitting in applications.

flowchart LR
    A[Board Dimensions] --> B[Length ± 5 mm]
    A --> C[Width ± 5 mm]
    A --> D[Thickness ± 0.3-0.5 mm]
    A --> E[Flatness & Smoothness]
    A --> F[Uniform Thickness & Density]
    A --> G[Measurement per IS 2380 (Part 2)]

This ensures boards meet quality and fitment requirements for construction and furniture use.

IS 14276: Physical Characteristics of Cement Bonded Particle Boards

Notes:

• Thickness tolerance: 12-20 mm ±1.5 mm; >20 mm ±2 mm.
• Edge straightness: 2 mm per 1000 mm.
• Squareness: 2 mm per 1000 mm.

Summary Formula for Modulus of Rupture (MOR):

[ \text{MOR} = \frac{3PL}{2bd^2} ]

Where:

• (P) = Load at failure (N)
• (L) = Span length (mm)
• (b) = Width of specimen (mm)
• (d) = Thickness of specimen (mm)

flow

IS 14276: Sampling and Inspection Key Points

1. Scale of Sampling (Clause 9.1.2)

Number of boards to select from a lot:

2. Testing and Requirements (Clause 10.1, Table 1)

3. Special Testing Notes

• Wet MOR: Specimens soaked 24h at 27±2°C before test.
• Accelerated Ageing: Boil specimens 2h, dry to ~12% moisture, then test tensile strength.
• pH Measurement: After 72h water immersion, measure water pH.

IS 14276: Testing of Samples - Key Points

1. Test Specimens (Clause 9.2, 9.2.1(f))

• Specimen count: 3 specimens each for dry and wet conditions per sample.
• Dimensions: As per IS 2380 (Part 4): 1977.

2. Testing Requirements (Clause 10.1)

• Test specimens must conform to requirements in Clause 8 and Table 1.

3. Mechanical Properties (Table 1 - Modified)

4. Failure Protocol (Clause 9.3.1)

• On failure, double the number of samples must be tested.
• Lot passes if all new samples meet requirements.

flowchart TD
    A[Sample Collection] --> B[Test Specimens Preparation]
    B --> C{Test Conditions}
    C -->|Dry| D[3 Specimens]
    C -->|Wet| E[3 Specimens]
    D & E --> F[Testing as per IS 2380 (Part 4)]
    F --> G[Check Modulus of Rupture & Elasticity]
    G --> H{Pass?}
    H -->|Yes| I[Lot Accepted]
    H -->|No| J[Double Samples Tested]
    J --> K{All Pass?}
    K -->|Yes| I
    K -->|No| L[Lot Rejected]

Summary: Test 3 dry + 3 wet specimens per sample, check modulus values per Table 1, and double samples if failure occurs.

IS 14276: Certification and Marking Key Points

1. BIS Certification Mark (Clause 11.2.1)

• Products may be marked with the Standard Mark indicating compliance with IS 14276.

2. Mechanical Properties (Table 1 - Modified)

3. Test Specimens (Clause 9.2.1(f))

• 3 specimens each for dry and wet conditions.
• Dimensions as per IS 2380 (Part 4): 1977.

4. Criteria for Conformity (Clause 9.3)

• A lot passes if all samples and test specimens meet requirements in Clause 10.

flowchart TD
    A[Sample Lot] --> B{Test Specimens}
    B -->|Dry Condition| C[3 Specimens]
    B -->|Wet Condition| D[3 Specimens]
    C & D --> E{Test Results}
    E -->|Pass| F[Lot Conforms]
    E -->|Fail| G[Lot Rejected]

Summary: Mark with BIS Standard Mark after passing mechanical tests (modulus of rupture & elasticity) on prescribed specimens.

IS 14276: Cement Bonded Particle Boards - Key Annex Specifications & Formulas

Annex A: Related Indian Standards

• Annex A lists necessary adjunct Indian Standards for complementary reference (Clause 2.1).

Mechanical Properties (Table 1, amended)

Test Specimen Requirements (Clause 9.2.1(f))

• Use 3 specimens each for dry and wet conditions.
• Specimens must conform to dimensions per IS 2380 (Part 4):1977.

Testing Modulus of Elasticity (Clause 10.8)

• Follow IS 2380 (Part 4):1977 for test procedure.
• Confirm average and minimum individual values per Table 1.

Summary Formula for Modulus of Elasticity (E) Testing:

[ E = \frac{\Delta \sigma}{\Delta \varepsilon} = \frac{\text{Stress change}}{\text{Strain change}} ]

Where:

• Stress and strain are measured under controlled loading conditions.

flowchart TD
    A[Sample Preparation] --> B[Specimen Dimensions per IS 2380]
    B --> C[Conditioning: Dry & Wet]
    C --> D[Mechanical Testing]
    D --> E[Measure MOR & MOE]
    E --> F[Compare with Table 1 Limits]

Note: Always refer to the latest amendments and IS codes for precise testing methodology and acceptance criteria.