Bitumen-based felts - Method of the test, Part 4: Pressure head test

IS 13826 Part 4: Scope - Key Points & Specifications

Scope Summary:

• Applies to bituminous waterproofing and damp-proofing materials.
• Definitions as per IS 4911:1986 apply.
• Testing involves conditioning samples at:
  • 65 ± 2°C for 3 hours (hot conditioning)
  • 5°C or lower for 3 hours (cold conditioning)
• Samples are subjected to a constant pressure head of 300 mm water for 1 hour to check leakage.

Key Specifications & Testing Procedure (Clause 5.2)

Rounding Off (General)

• Follow IS 2:1960 for rounding numerical values.
• Retain the same number of significant figures as specified in the standard.

Reference

• Use IS 4911:1986 for all relevant definitions related to bituminous waterproofing.

flowchart LR
    A[Sample Preparation] --> B{Conditioning}
    B --> C[Hot: 65 ± 2°C, 3 hr]
    B --> D[Cold: ≤ 5°C, 3 hr]
    C & D --> E[Apply 300 mm Water Head]
    E --> F[Observe Leakage for 1 hr]
    F --> G{Leakage?}
    G -- No --> H[Pass]
    G -- Yes --> I[Fail]

This concise summary covers the scope, conditioning, testing, and rounding rules as per IS 13826 Part 4. For detailed test methods and definitions, refer to IS 4911:1986.

Key References & Specifications from IS 13826 Part 4

• Rounding Off (Clause None):
  Final test/analysis values must be rounded per IS 2:1960 rules, retaining the same significant figures as specified.

• Conditioning of Test Pieces (Clause 5.2):

  Conditioning Type	Temperature	Duration	Test Conditions
  a) Hot Conditioning	65 ± 2°C	3 hours	Subjected to 300 mm water pressure head, checked for leakage for 1 hour
  b) Cold Conditioning	≤ 5°C	3 hours	Tested immediately after conditioning under same pressure

• Reporting Requirements:

  • Date of testing
  • Type of conditioning
  • Observations on leakage

• Definitions:
  Refer to IS 4911:1986 for terms related to bituminous waterproofing and damp-proofing.

Summary Table: Conditioning & Testing

Notes:

• Use IS 2:1960 for rounding test results.
• IS 4911:1986 is essential for terminology.
• Conditioning ensures durability and performance under temperature extremes.

flowchart TD
    A[Test Pieces] --> B{Conditioning}
    B -->|Hot| C[65 ± 2°C for 3 h]
    B -->|Cold| D[≤ 5°C for 3 h]
    C --> E[Test under 300 mm water pressure]
    D --> E
    E --> F[Leakage check for 1 hour]
    F --> G[Report: Date, Conditioning type, Observation]

For detailed test procedures and quality control, always consult the full standard and related IS codes.

IS 13826 Part 4: Definitions Key Points

• Definitions Reference: Clause 3.0 states that all definitions used in IS 13826 Part 4 refer to IS 4911:1986 — Glossary of terms relating to bituminous waterproofing and damp-proofing of buildings.

• Rounding Off: For test results or calculations, values must be rounded as per IS 2:1960 rules, maintaining the same number of significant figures as specified.

Summary Table

Additional Notes

• Conditioning Test Procedure:
  • Three test pieces at 65 ± 2°C for 3 hours.
  • Three test pieces at 5°C or lower for 3 hours.
  • Test under 300 mm water pressure for 1 hour, check for leakage.

Visual: Conditioning Test Setup

flowchart LR
    A[Test Pieces] --> B[Condition at 65±2°C for 3h]
    A --> C[Condition at ≤5°C for 3h]
    B --> D[Apply 300 mm water pressure]
    C --> D
    D --> E[Observe leakage for 1 hour]

For detailed definitions, always refer to IS 4911:1986.

IS 13826 Part 4: Apparatus for Pressure Head Test

• Test Piece: Circular, diameter = 200 mm.
• Pressure Head: Constant water column height = 300 mm.
• Arrangement: As per Fig. 1 (Circular test piece under water head).
• Conditioning of Test Pieces (Clause 5.2):
  • 3 pieces conditioned at 65 ± 2°C for 3 hours.
  • 3 pieces conditioned at 5°C or lower for 3 hours, then tested immediately.
• Test Duration: Each piece subjected to constant pressure head for 1 hour, checked periodically for leakage.
• Reporting: Include date, conditioning type, and observations.
• Rounding Off: Follow IS 2:1960 rules for numerical rounding, matching significant figures of specified values.

Key Formula:

Hydrostatic pressure head ( P ) (in Pascal) from water column height ( h ) (in meters):

[ P = \rho \times g \times h ]

Where:

• ( \rho = 1000 , \text{kg/m}^3 ) (density of water),
• ( g = 9.81 , \text{m/s}^2 ),
• ( h = 0.3 , \text{m} ) (300 mm).

[ P = 1000 \times 9.81 \times 0.3 = 2943 , \text{Pa} \approx 2.94 , \text{kPa} ]

Apparatus Conceptual Diagram (Simplified):

flowchart TB
    A[Water Reservoir] --> B[300 mm Water Column]
    B --> C[Apparatus Holding Circular Test Piece (200 mm dia)]
    C --> D[Outlet / Drain]
    style C fill:#add8e6,stroke:#000,stroke-width:2px

This setup ensures a constant hydrostatic pressure head of 300 mm on the test piece for leakage evaluation.

IS 13826 Part 4: Test Specimen Preparation & Conditioning

Clause 5.1: Preparation of Test Pieces

• Cut 6 test pieces, each at least 200 mm diameter.
• Ensure part of the specimen extends beyond the clamping plate when fixed.

Clause 5.2: Conditioning of Test Pieces

• After conditioning, place each piece under a constant pressure head of 300 mm.
• Observe for leakage periodically over 1 hour.

Reporting Must Include:

• Date of testing
• Type of conditioning used
• Observations (e.g., leakage presence)

Summary Table for Conditioning

flowchart LR
    A[Cut 6 test pieces (≥200 mm)] --> B{Conditioning}
    B --> C[3 pieces at 65 ± 2°C for 3h]
    B --> D[3 pieces at ≤ 5°C for 3h]
    C & D --> E[Place under 300 mm pressure head]
    E --> F[Observe leakage for 1 hour]
    F --> G[Report date, conditioning type, observations]

This ensures consistent preparation and reliable waterproofing test results per IS 13826 Part 4.

IS 13826 Part 4: Pressure Head Test - Key Points

• Test Specimen: Circular felt sample, diameter = 200 mm.
• Test Setup: Subject the felt to a constant water pressure head of 300 mm.
• Purpose: To check water resistance of bitumen-based felts under specified pressure.
• Apparatus: Arrangement as per Fig. 1 (circular sample mounted, water column applying pressure).
• Rounding Off: Final test results must be rounded per IS 2:1960 rules, maintaining the same significant figures as specified values.

Summary Table

Test Procedure Overview

1. Mount the felt sample securely.
2. Apply water pressure head of 300 mm.
3. Observe for leakage or failure.
4. Record and round off results as per IS 2.

flowchart LR
    A[Prepare 200 mm Felt Sample] --> B[Mount Sample in Apparatus]
    B --> C[Apply 300 mm Water Pressure Head]
    C --> D[Observe for Leakage]
    D --> E[Record Result]
    E --> F[Round Off per IS 2:1960]

This test ensures compliance with water resistance requirements for bitumen felts.

IS 13826 Part 4: Observations and Reporting - Key Points

Rounding Off Results (IS 2:1960)

• Final test values must be rounded off per IS 2:1960 rules.
• Retain the same number of significant figures as specified in the standard.

Conditioning of Test Pieces (Clause 5.2)

• Test pieces are subjected to a constant water pressure head of 300 mm.
• Check for leakage periodically over 1 hour.

Reporting Requirements

• Date of testing
• Type of conditioning (hot/cold)
• Observations (leakage, failure, etc.)

Test Setup Summary (Fig. 1)

• Circular test piece diameter: 200 mm
• Constant pressure head: 300 mm water column

flowchart LR
    A[Test Piece (Ø 200 mm)] --> B[Constant Water Pressure Head (300 mm)]
    B --> C[Leakage Check for 1 hour]
    C --> D{Leakage?}
    D -->|Yes| E[Record Leakage Observation]
    D -->|No| F[Pass Test]

This ensures uniformity in test conditions and clarity in reporting for waterproofing felts.

IS 13826 Part 4: Precision & Interpretation of Results

Key Points from the Standard:

• Rounding Off (IS 2:1960): Final test or analysis results must be rounded off to the same number of significant figures as specified in the standard.

• Test Setup (Clause 4.1):

  • Circular test piece diameter: 200 mm
  • Constant water pressure head: 300 mm
  • Test duration: 1 hour, checking periodically for leakage.

• Conditioning (Clause 5.2):

  • Three test pieces conditioned at 65 ± 2°C for 3 hours.
  • Three test pieces conditioned at 5°C or lower for 3 hours and tested immediately.

• Reporting Requirements:

  • Date of testing
  • Type of conditioning
  • Observations (e.g., leakage)

Summary Table: Conditioning & Testing

Interpretation of Results:

• If no leakage is observed during the test period under specified conditions, the material complies.
• Results should be reported with proper rounding as per IS 2:1960 to maintain precision.

Visual: Test Setup (Simplified)

flowchart TB
    A[Circular Test Piece (Ø 200 mm)] --> B[Clamping Plate]
    B --> C[Water Column (300 mm Head)]
    C --> D[Leakage Observation for 1 Hour]

Note: Use IS 2:1960 for rounding rules to ensure consistent interpretation of numerical results.

IS 13826 Part 4 - Committee Composition Summary

The technical committee for IS 13826 Part 4 is the Water-Proofing and Damp-Proofing Sectional Committee, CED 41. Its composition is detailed in Annex A and includes:

• Chairman: Prof. M. S. Shetty (In Personal Capacity, Pune)
• Members: Representatives from diverse organizations such as Osnar Chemical Pvt Ltd, National Test House, National Building Organization, Central Road Research Institute, Engineers India Ltd, Metro Railway, Polyseal India Engineering Centre, CPWD, Army Headquarters, Overseas Water-Proofing Corporation, Fosroc India Ltd, B. G. Shirke & Co, Lloyd Bitumen Products, MES Builders Association, Central Building Research Institute, and others.
• Each member often has an alternate for representation.

This committee ensures a broad representation from industry, government, research, and consultancy for standard formulation.

Key Points:

• Committee consists of experts from industry, government bodies, research institutes, and consultants.
• The Chairman leads the committee.
• Alternates are nominated to maintain quorum and continuity.
• The committee oversees standard development, testing protocols, and quality assurance.

Diagram: Committee Structure Overview

graph TD
    A[Chairman: Prof. M. S. Shetty] --> B[Members]
    B --> C[Industry Representatives]
    B --> D[Government Agencies]
    B --> E[Research Institutes]
    B --> F[Consultants & Others]
    C --> C1[Osnar Chemical Pvt Ltd]
    C --> C2[Fosroc India Ltd]
    D --> D1[CPWD]
    D --> D2[Army HQ]
    E --> E1[CBRI Roorkee]
    E --> E2[NBO Delhi]
    F --> F1[Metro Railway]
    F --> F2[Polyseal India]

This composition ensures comprehensive expertise for waterproofing and damp-proofing standards under IS 13826 Part 4.