Bitumen based felts - Methods of test, Part 2: Pliability test

IS 13826 Part 2: Scope Summary

Scope:
This standard applies to the testing and quality control of waterproofing and damp-proofing materials as per definitions in IS 4911:1986, ensuring materials meet durability and performance criteria.

Key Points:

• Reference Standard: IS 4911:1986 for definitions related to waterproofing materials.
• Testing Procedure (Clause 5.3):
  • Test pieces are wound around a mandrel at 25 mm/s speed.
  • After bending, check for cracks or ruptures > 5 mm upon unrolling.
• Purpose:
  Ensures materials resist cracking/rupture under bending stresses, simulating field conditions.

Important Specifications:

Notes:

• The standard is governed by BIS quality control and inspection systems.
• The Standard Mark ensures compliance with these requirements.

flowchart LR
    A[Test Piece] --> B[Wound on Mandrel at 25 mm/s]
    B --> C[Bending Test]
    C --> D{Cracks/Rupture > 5 mm?}
    D -- Yes --> E[Fail]
    D -- No --> F[Pass]

This concise scope ensures waterproofing materials are tested for flexibility and integrity under bending stresses.

IS 13826 (Part 2): Key References and Specifications

• Test Procedure (Clause 5.3):

  • Test pieces are wound around a mandrel at a uniform speed of 25 mm/s.
  • The strip is placed on a flat surface, clamped at the loose end, and the mandrel rolled over it maintaining contact.
  • After unrolling, check for cracks or ruptures exceeding 5 mm.

• Relevant Standards Referenced:

  • IS 4911:1986 (Definitions related to waterproofing materials)
  • IS 13828 (Part 2): 1993 (Related waterproofing standards)

• BIS & Standard Mark:

  • BIS ensures product compliance via inspection, testing, and quality control under the Bureau of Indian Standards Act, 1986.
  • Use of the Standard Mark implies conformity and continuous surveillance.

• Committee Composition:

  • Diverse experts from chemical companies, research institutes, government departments, and industry representatives contributed to the standard.

Summary Table: Test Parameters (Clause 5.3)

flowchart TD
    A[Test Strip] --> B[Clamp Loose End]
    B --> C[Mandrel Rolling at 25 mm/s]
    C --> D[Unroll Strip]
    D --> E{Check Cracks/Ruptures}
    E -->|≤ 5 mm| F[Pass]
    E -->|> 5 mm| G[Fail]

For detailed definitions and further specifications, refer to IS 4911:1986 and IS 13828 (Part 2):1993.

IS 13826 Part 2 — Definitions Summary

• Reference Standard: Definitions are primarily as per IS 4911:1986 — Glossary of terms relating to bituminous waterproofing and damp-proofing.
• This standard supplements IS 4911 with additional definitions specific to IS 13826 Part 2.
• The definitions cover terms related to materials, testing methods, and performance criteria for waterproofing felts and related products.

Key Points on Definitions:

• Mandrel Test (Clause 5.3):

  • Test piece wound around a mandrel at 25 mm/s speed.
  • After rolling and unrolling, check for cracks or ruptures > 5 mm.
  • This defines acceptance criteria for flexibility and durability.

• Standard Mark:

  • Products conforming to this standard carry the BIS Standard Mark indicating compliance under BIS inspection and quality control.

Practical Use:

• Always consult IS 4911:1986 for basic waterproofing terms.
• Use IS 13826 Part 2 for specific test methods and acceptance criteria.
• Definitions ensure uniform understanding of terms like "bituminous felt," "mandrel test," and "crack size" in testing.

flowchart TD
    A[IS 13826 Part 2] --> B[Definitions]
    B --> C[Refer IS 4911:1986]
    B --> D[Additional Definitions]
    D --> E[Mandrel Test Procedure]
    E --> F[Speed = 25 mm/s]
    E --> G[Crack length limit = 5 mm]
    B --> H[Standard Mark Compliance]

Summary: IS 13826 Part 2 relies on IS 4911:1986 for definitions, adding specific test criteria (e.g., mandrel test speed and crack limits) to ensure consistent quality and performance of waterproofing materials.

IS 13826 (Part 2) - Apparatus Specifications & Key Procedures

Apparatus & Testing Procedure (Clause 5.3)

• Mandrel winding speed: 25 mm/s (uniform)
• Test piece setup: Place strip on plain surface, clamp loose end.
• Mandrel action: Roll over felt maintaining contact, bend at required speed.
• Inspection: After unrolling, check for cracks or ruptures > 5 mm.
• Report: Presence/absence of cracks or ruptures exceeding 5 mm.

Key Points:

• Uniform speed ensures consistent bending stress.
• Mandrel diameter and test piece dimensions should comply with IS 4911:1986 (referenced for definitions).
• Apparatus must ensure smooth rolling without slipping or sudden jerks.

Summary Table: Apparatus Parameters

Conceptual Diagram (Mandrel Test Setup)

flowchart LR
    A[Test Piece on Flat Surface] --> B[Loose End Clamped]
    B --> C[Mandrel Rolling Over Felt]
    C --> D[Uniform Speed: 25 mm/s]
    D --> E[Check for Cracks > 5 mm]

For detailed apparatus dimensions and other parameters, refer to IS 4911:1986 and IS 13826 Part 2 full text.

IS 13826 Part 2: Sampling and Preparation of Test Pieces

Key Specifications & Procedures:

• Sample Dimensions (Clause 5.1):

  • Cut 10 test pieces from each sample:
    • Width: 25 mm
    • Length: ≥ 250 mm
  • Orientation:
    • 5 pieces in longitudinal direction
    • 5 pieces in transverse direction

• Conditioning (Clause 5.2):

  • Condition test pieces at the required temperature for 3 hours
  • Test immediately after conditioning

• Testing Procedure (Clause 5.3):

  • Wind test piece around a mandrel at 25 mm/s speed
  • Place strip on a flat surface, clamp loose end
  • Roll mandrel over felt maintaining contact throughout
  • After unrolling, check for cracks or ruptures
  • Report if cracks/ruptures exceed 5 mm

Summary Table:

flowchart TD
    A[Cut 10 Test Pieces] --> B[Condition 3 hrs at required temp]
    B --> C[Wind on Mandrel at 25 mm/s]
    C --> D[Unroll and Inspect]
    D --> E{Cracks/Ruptures > 5 mm?}
    E -- Yes --> F[Report Failure]
    E -- No --> G[Pass Test]

This ensures consistent sample preparation and reliable testing of bitumen-based felt as per IS 13826 Part 2.

IS 13826 Part 2: Conditioning of Test Pieces

Key Specifications:

• Test piece size: 25 mm wide × minimum 250 mm long (Clause 5.1)
• Number of test pieces: 10 per sample (5 longitudinal, 5 transverse)
• Conditioning temperature: Up to 15℃ depending on felt type (Clause 4.2)
• Conditioning duration: 3 hours at required temperature (Clause 5.2)
• Testing: Immediately after conditioning

Conditioning Procedure (Clause 5.3):

• Test pieces are wound around a mandrel at 25 mm/s speed.
• Mandrel rolls over the felt maintaining contact.
• After unrolling, check for cracks or ruptures > 5 mm.
• Report presence/absence of cracks or ruptures exceeding 5 mm.

Summary Table: Conditioning & Testing Parameters

flowchart TD
    A[Cut 10 test pieces] --> B[Condition at required temp (3 hrs)]
    B --> C[Wind test piece on mandrel @ 25 mm/s]
    C --> D[Unroll and inspect]
    D --> E{Cracks or rupture > 5 mm?}
    E -->|Yes| F[Report failure]
    E -->|No| G[Pass]

This ensures uniform sample conditioning and reliable testing of waterproofing felts as per IS 13826 Part 2.

IS 13826 Part 2: Test Procedure for Bitumen Based Felt (Pliability Test)

Key Test Procedure (Clause 5.3):

• Mandrel winding speed: 25 mm/s (uniform speed).
• Test piece preparation:
  • Strip wound around mandrel.
  • Placed on plain surface.
  • Loose end clamped.
• Mandrel rolling: Rolled over felt maintaining contact with mandrel surface.
• Inspection: After unrolling, check for cracks or ruptures > 5 mm.
• Result: Report presence or absence of cracks/ruptures exceeding 5 mm.

Conditioning (Clause 5.2):

• Test pieces conditioned for 3 hours at specified temperature before testing.

Summary Table for Pliability Test

flowchart LR
    A[Test Piece Preparation] --> B[Conditioning for 3 hours]
    B --> C[Winding on Mandrel at 25 mm/s]
    C --> D[Rolling Mandrel over Felt]
    D --> E[Unroll and Inspect]
    E --> F{Cracks/Ruptures > 5 mm?}
    F -- Yes --> G[Fail]
    F -- No --> H[Pass]

This test ensures the flexibility and durability of bitumen felt under bending stresses per IS 13826 Part 2.

IS 13826 Part 2 (1993) - Pliability Test: Key Points

Definition:

• Pliability: Resistance of bitumen felt against damage or cracking when unrolled on a smooth, flat surface (Clause 3.1).

Test Conditions:

• Samples must be conditioned at specific temperatures depending on felt type, as per relevant IS standards (Clause 4.2).
• Refer to IS 1322:1993 and IS 1793:1993 for types of bitumen felts and conditioning temperatures.

Test Procedure Summary:

• Unroll the felt sample on a smooth surface after conditioning.
• Observe for cracks or damage indicating failure of pliability.

Specifications:

• No explicit formula in IS 13826-2.
• Compliance is based on visual inspection for cracks after conditioning.
• Temperature conditioning varies by felt type (hessian or glass fibre base).

Additional Notes:

• Pliability is a qualitative test.
• Related IS standards specify temperature for conditioning:
  • Hessian-based felt: typically conditioned at ~25°C or as specified.
  • Glass fibre-based felt: may require higher conditioning temperature.

Summary Table: Conditioning Temperature (Indicative)

flowchart LR
    A[Condition Sample] --> B[Unroll on Flat Surface]
    B --> C{Cracks or Damage?}
    C -->|No| D[Pass Pliability Test]
    C -->|Yes| E[Fail Pliability Test]

For detailed temperature and sample preparation, always refer to the relevant IS (1322, 1793) linked with IS 13826 Part 2.

Reporting of Results — IS 13826 (Part 2): 1993

Key Specifications (Clause 5.3):

• Test pieces are wound around a mandrel at a uniform speed of 25 mm/s.
• The strip is placed on a flat surface; the loose end is clamped.
• The mandrel is rolled over the felt to bend it, maintaining contact throughout.
• After unrolling, the test piece is examined for cracks or ruptures.

Acceptance Criteria:

• Report if cracks or ruptures exceed 5 mm in length after unrolling.

Summary Table for Reporting

Notes for Reporting

• Clearly state whether cracks/ruptures were observed.
• Specify length and location if cracks exceed 5 mm.
• Include test conditions (speed, mandrel diameter if applicable).

flowchart TD
    A[Test Piece] --> B[Wound on Mandrel at 25 mm/s]
    B --> C[Mandrel Rolled Over Felt]
    C --> D[Unroll Test Piece]
    D --> E{Cracks > 5 mm?}
    E -- Yes --> F[Report Crack Details]
    E -- No --> G[Report No Significant Cracks]

This concise reporting ensures compliance with IS 13826 Part 2 testing protocol.

Composition of Technical Committee (IS 13826 Part 2 - Annex A)

The Water-proofing and Damp-proofing Sectional Committee, CED 41 comprises:

• Chairman: Prof. M. S. Shetty (Personal Capacity)
• Members: Representatives from diverse organizations including:
  • Osnar Chemical Pvt Ltd
  • National Test House (ER), Calcutta
  • National Building Organization, New Delhi
  • Central Road Research Institute, New Delhi
  • Engineers India Ltd
  • Metro Railway, Calcutta
  • Polyseal India Engineering Centre
  • Central Public Works Department, CDO
  • Army Headquarters, New Delhi
  • Overseas Water-proofing Corporation Ltd
  • Fosroc India Ltd
  • Building Materials & Technology Promotion Council
  • Bharat Petroleum Corporation Ltd
  • B. G. Shirke & Co
  • Lloyd Bitumen Products Pvt Ltd
  • MES Builders Association of India
  • STP Ltd
  • MC-Bauchemic (India) Ltd
  • Integrated Water-proofing Ltd
  • Public Works Department, Tamil Nadu
  • FGP Ltd
  • Central Building Research Institute (CSIR), Roorkee
  • Projects and Development India Ltd
  • BIS Director General (Ex-officio)
  • Director Incharge (Civil Engineering)
  • Secretary: Shri J. K. Prasad (Joint Director, Civil Engineering)

Key Notes:

• The committee includes alternate members for many representatives.
• Members represent government, research institutes, industry, and professional bodies ensuring comprehensive expertise.
• The committee guides standardization for waterproofing and damp-proofing materials and methods.

If you need specific formulas or testing procedures, please specify the clause or test method.