Bitumen-based felts - Methods of the test, Part 6: Water absorption test

IS 13826 Part 6: Scope & Key Specifications Summary

Scope:

• Defines test methods for waterproofing and damp-proofing materials.
• Uses definitions from IS 4911:1986.

Key Formula for Water Absorption (Clause 5.3):

[ \text{Water Absorption (%)} = \frac{M_2 - M_1}{M_1} \times 100 ]

• M₁ = Mass before immersion (g)
• M₂ = Mass after 45 minutes air drying post-immersion (g)

Test Procedure Highlights:

• Test pieces immersed in distilled water.
• After immersion, hang samples diagonally at 27 ± 2°C and 65 ± 5% RH for 45 minutes.
• Weigh to nearest 0.1 g after drying.

Reporting Requirements:

• Date of testing
• Type of conditioning
• Observations on water absorption

Notes:

• The standard ensures quality control via BIS licensing.
• The procedure helps evaluate waterproofing performance through water absorption.

flowchart LR
    A[Prepare Test Pieces] --> B[Immerse in Distilled Water]
    B --> C[Hang Diagonally at 27±2°C, 65±5% RH]
    C --> D[Dry for 45 Minutes]
    D --> E[Weigh Sample (M2)]
    E --> F[Calculate Water Absorption]
    F --> G[Report Results]

IS 13826 Part 6: Water Absorption Test for Bitumen Felts

Key Formula:

Water absorption (%) is calculated as:

[ \text{Water absorption} = \frac{M_2 - M_1}{M_1} \times 100 ]

• M1 = Mass before immersion (g)
• M2 = Mass after 45 minutes air drying post-immersion (g)

Procedure Highlights (Clause 5.3):

• Immerse test pieces in distilled water at normal atmospheric temperature for 24 hours.
• Remove and hang diagonally for air drying at 27 ± 2°C and 65 ± 5% RH for 45 minutes.
• Weigh to nearest 0.1 g.
• Calculate water absorption using the above formula.

Reporting Includes:

• Date of testing
• Type of conditioning
• Observations

References:

• Definitions per IS 4911:1986 (Glossary for bituminous waterproofing)
• Related standards for bitumen felts: IS 1322, IS 7193, and other parts of IS 13826 (Parts 1-7).

flowchart TD
    A[Start: Prepare test piece] --> B[Immerse in distilled water for 24 hrs]
    B --> C[Remove and hang diagonally]
    C --> D[Air dry at 27 ± 2°C, 65 ± 5% RH for 45 mins]
    D --> E[Weigh test piece (M2)]
    E --> F[Calculate water absorption %]

This method ensures consistent evaluation of water absorption for quality control of bitumen felts used in waterproofing.

IS 13826 Part 6: Definitions & Key Formula

• Definitions: As per Clause 3.0, definitions for terms in this standard refer directly to IS 4911:1986 (Glossary of terms relating to bituminous waterproofing and damp-proofing).

Water Absorption Test (Clause 5.3)

• Procedure:

  • Dry test pieces at 27 ± 2°C and 65 ± 5% RH for 45 minutes after immersion.
  • Weigh before immersion (M1) and after drying (M2).

• Key Formula:

[ \text{Water absorption (%)} = \frac{M_2 - M_1}{M_1} \times 100 ]

Where:

• ( M_1 ) = Mass before immersion (g)

• ( M_2 ) = Mass after drying post-immersion (g)

• Reporting Must Include:

  • Date of testing
  • Type of conditioning
  • Observations

Reference Standards

This ensures consistent terminology and standardized testing for bitumen felts used in waterproofing.

IS 13826 Part 6 (1993) — Apparatus and Materials: Water Absorption Test for Bitumen Felts

Key Formula:

Calculate water absorption (%) as:

[ \text{Water absorption} = \frac{M_2 - M_1}{M_1} \times 100 ]

• M₁ = Mass before immersion (g)
• M₂ = Mass after 45 minutes air drying post-immersion (g)

Test Procedure Highlights (Clause 5.3):

• Immerse sample in distilled water at normal atmospheric temperature for 24 hours.
• Remove and hang diagonally for air drying at 27 ± 2°C and 65 ± 5% RH for 45 minutes.
• Weigh to nearest 0.1 g immediately after drying.

Reporting:

• Date of testing
• Type of conditioning
• Observations (water absorption %)

Apparatus:

• Trough for water immersion (Clause 4.2)
• Accurate weighing balance (0.1 g precision)
• Controlled environment chamber or room for drying maintaining specified temperature and humidity

Summary Table:

flowchart TD
    A[Sample Preparation] --> B[Immersion in distilled water (24 hrs)]
    B --> C[Remove & Hang diagonally for drying]
    C --> D[Dry at 27±2°C & 65±5% RH for 45 mins]
    D --> E[Weigh sample (M2)]
    E --> F[Calculate Water Absorption %]

This method ensures consistent evaluation of water absorption characteristics of bitumen felts used in waterproofing.

IS 13826 Part 6 (1993) — Water Absorption Test Procedure

Key Test Procedure (Clause 5.3)

• Sample Conditioning:
  Remove test pieces after 24-hour immersion in distilled water at room temperature. Hang diagonally for air drying at

  • Temperature: 27 ± 2°C
  • Relative Humidity: 65 ± 5%
  • Duration: 45 minutes

• Weighing:
  Weigh samples before immersion (M1) and after drying (M2) to nearest 0.1 g.

• Water Absorption Calculation:
  [ \text{Water absorption} (%) = \frac{M_2 - M_1}{M_1} \times 100 ]

  Where:

  • (M_1) = Mass before immersion
  • (M_2) = Mass after drying for 45 minutes

Reporting Requirements

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

Summary Table: Water Absorption Test

flowchart TD
    A[Start: Weigh sample (M1)] --> B[Immerse in distilled water for 24 hrs]
    B --> C[Remove and hang diagonally]
    C --> D[Air dry at 27±2°C, 65±5% RH for 45 mins]
    D --> E[Weigh sample again (M2)]
    E --> F[Calculate Water Absorption %]
    F --> G[Report results with date, conditioning type, observations]

This method ensures consistent measurement of water absorption for bitumen felts per IS 13826 Part 6.

IS 13826 Part 6: Calculation and Expression of Results

Key Formula for Water Absorption

Water absorption is calculated as the percentage increase in weight after immersion and drying:

[ \boxed{ \text{Water absorption} = \frac{M_2 - M_1}{M_1} \times 100 } ]

• M1 = Mass before immersion (g)
• M2 = Mass after 45 minutes air drying (g)

Procedure Summary (Clause 5.3)

• Remove test pieces after immersion.
• Hang diagonally for air drying at 27 ± 2°C and 65 ± 5% RH for 45 minutes.
• Reweigh to nearest 0.1 g.
• Calculate water absorption using the formula above.

Reporting Requirements

• Date of testing
• Type of conditioning
• Observations during the test

Additional Notes

• Conditioning environment ensures consistent drying.
• Accurate weighing critical for reliable results.
• Refer IS 4911:1986 for related definitions.

flowchart TD
    A[Start: Sample immersed in water] --> B[Remove sample]
    B --> C[Hang diagonally at 27±2°C, 65±5% RH]
    C --> D[Dry for 45 minutes]
    D --> E[Weigh sample (M2)]
    E --> F[Calculate Water Absorption]
    F --> G[Report results with date, conditioning, observations]

IS 13826 Part 6: Reporting Key Points

Water Absorption Calculation (Clause 5.3)

• Procedure:

  • Remove test pieces after immersion.
  • Hang diagonally for air drying at 27 ± 2℃ and 65 ± 5% RH for 45 minutes.
  • Reweigh to nearest 0.1 g.

• Formula:
  [ \text{Water Absorption (%)} = \frac{M_2 - M_1}{M_1} \times 100 ] Where:

• (M_1) = Mass before immersion (g)

• (M_2) = Mass after drying (g)

Reporting Requirements (Clause 4.3 & 5.3)

• Include in report:
  • Date of testing
  • Type of conditioning (e.g., air drying conditions)
  • Observations (e.g., appearance, any defects)

Summary Table for Reporting

flowchart TD
    A[Test Piece Immersed] --> B[Remove & Hang Diagonally]
    B --> C[Air Dry @ 27±2℃, 65±5% RH for 45 min]
    C --> D[Weigh Sample (M2)]
    D --> E[Calculate Water Absorption]
    E --> F[Prepare Report]
    F --> G[Include Date, Conditioning, Observations]

This ensures standardized, reproducible reporting per IS 13826 Part 6.

Committee Composition - IS 13826 Part 6 (1993)

The Water-Proofing and Damp-Proofing Sectional Committee, CED 41 is composed of experts representing various organizations, ensuring a broad and authoritative standard development.

Key Highlights:

• Chairman: Prof. M. S. Shetty
• Members: Representatives from:
  • Chemical companies (e.g., Osnar Chemical Pvt Ltd)
  • National Test House
  • National Building Organisation
  • Central Road Research Institute
  • Engineers India Ltd
  • Metro Railway, Calcutta
  • Polyseal India Engineering Centre
  • Central Public Works Department
  • Army Headquarters (Engineer-in-Chief's Branch)
  • 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
  • MC-Bauchemic (India) Ltd
  • Integrated Water-Proofing Ltd
  • Public Works Department, Tamil Nadu
  • Central Building Research Institute (CSIR)
  • Projects and Development India Ltd
  • Bureau of Indian Standards (Ex-officio member)

Specifications:

• The committee ensures the standard's development, revision, and quality control.
• Members include both primary and alternate representatives.
• The committee composition reflects multidisciplinary expertise from industry, research, government, and standards bodies.

Summary Table of Committee Composition (Sample)