Acrylic-based polymer waterproofing material - Methods of the test, Part 3: Determination of capillary water take-up

Scope of IS 13435 Part 3: Determination of Capillary Water Take-up

This part specifies the method to determine the capillary water absorption of acrylic-based polymer waterproofing materials applied on concrete slabs.

Key Specifications

• Specimen size: 240 mm × 240 mm × 45 mm (cut from aerated concrete block of density 451 to 550 kg/m³, grade 1, size 600 mm × 250 mm × 200 mm per IS 2185 Part 3).
• Number of samples: Minimum 3 specimens.
• Conditioning: Coated slabs conditioned for 28 days before testing.
• Testing: Slabs immersed in water for 24 hours, then reweighed.

Core Formula for Capillary Water Take-up

[ \text{Capillary water take-up} = \frac{W_2 - W_1}{V_{24}} = 0.204 \times (W_2 - W_1) ]

Where:

Reporting Requirements

• Date of sample preparation
• Date of water immersion
• Date of testing
• Average capillary water take-up value

This ensures quality control and performance evaluation of waterproofing materials per BIS guidelines.

flowchart TD
    A[Prepare Specimen (240×240×45 mm)] --> B[Condition for 28 days]
    B --> C[Weigh specimen: W1]
    C --> D[Immerse in water for 24 h]
    D --> E[Reweigh specimen: W2]
    E --> F[Calculate Capillary Water Take-up]
    F --> G[Report results]

Note: Use IS 2:1960 for rounding off numerical values.

IS 13435 Part 3 — Key Formulas, Tables & Specifications for Capillary Water Take-up

Specimen Preparation (Clause 4.3)

• Specimen size: 240 mm × 240 mm × 45 mm
• Material: Aerated concrete block, density ~500 kg/m³ (per IS 2185 Part 3)
• Samples: Minimum 3 specimens

Capillary Water Take-up Formula

[ \text{Capillary water take-up} = \frac{W_2 - W_1}{V} \times 24 = 0.204 \times (W_2 - W_1) ]

Where:

• ( W_1 ) = Weight of coated slab after 28 days conditioning (kg)
• ( W_2 ) = Weight of coated slab after 24 h water immersion (kg)
• ( V ) = Volume of specimen (m³)

Note: The factor 0.204 relates to specimen volume normalization.

Reporting Requirements (Clause 6)

• Date of sample preparation
• Date of immersion in water
• Date of testing
• Average capillary water take-up

Summary Table: Specimen Details

This method quantifies water penetration in acrylic polymer coatings, ensuring waterproofing efficacy per IS 13435 Part 3.

IS 13435 Part 3: Apparatus & Key Specifications for Capillary Water Take-Up Test

Apparatus:

• Aerated Concrete Slabs:
  • Density: 451 to 550 kg/m³ (typically 500 kg/m³)
  • Size: 240 mm × 240 mm × 45 mm
  • Manufactured as per IS 2185 (Part 3): 1984
• Plastic Pan:
  • Large enough to hold one or more horizontal specimens submerged partially in water.

Key Formula for Capillary Water Take-Up:

[ \text{Capillary water take-up} = 0.204 \times (w_2 - w_1) ]

Where:

• ( w_1 ) = Weight of coated slab after 28 days conditioning (kg)
• ( w_2 ) = Weight of coated slab after 24 hours water immersion (kg)

Procedure Highlights:

• Condition slabs for 28 days.
• Immerse in water for 24 hours.
• Measure weights ( w_1 ) and ( w_2 ).
• Use at least 3 samples for averaging.

Reporting:

• Date of preparation, immersion, and testing.
• Average capillary water take-up value.

flowchart TD
    A[Prepare Aerated Concrete Slabs] --> B[Condition for 28 Days]
    B --> C[Weigh Slabs (w1)]
    C --> D[Immerse in Water for 24 Hours]
    D --> E[Weigh Slabs (w2)]
    E --> F[Calculate Capillary Water Take-Up]
    F --> G[Report Results]

This ensures standardized evaluation of acrylic polymer waterproofing materials' water penetration resistance.

IS 13435 Part 3: Preparation of Specimen & Procedure for Capillary Water Take-up Test

Specimen Preparation (Clause 4.1 & Amendment No.1)

• Use aerated concrete slabs:
  • Size: 240 mm × 240 mm × 45 mm
  • Density: 451 to 550 kg/m³
  • Grade 1, per IS 2185 (Part 3)
• Apply the acrylic polymer coating on slab surface and allow to dry.
• Seal the sides of the slab with polyurethane finish to prevent lateral water ingress.

Testing Procedure (Clause 4.3)

• After 28 days conditioning, weigh the coated slab: W₁.
• Immerse the slab in water for 24 hours.
• Remove and reweigh the slab: W₂.
• Use at least three samples for accuracy.

Key Formula for Capillary Water Take-up:

[ \text{Capillary water take-up} = 0.204 \times (W_2 - W_1) \quad \text{(kg/m}^2\text{)} ]

Where:

• (W_1) = Weight after 28 days conditioning (kg)
• (W_2) = Weight after 24 h water immersion (kg)

Reporting (Clause 6)

Include:

• Date of preparation
• Date of immersion
• Date of testing
• Average capillary water take-up (kg/m²)

flowchart TD
    A[Prepare Aerated Concrete Slabs] --> B[Apply Polymer Coating]
    B --> C[Dry & Cure for 28 Days]
    C --> D[Weigh Specimen (W₁)]
    D --> E[Immerse in Water for 24h]
    E --> F[Weigh Specimen (W₂)]
    F --> G[Calculate Capillary Water Take-up]
    G --> H[Report Results]

This method ensures standardized evaluation of waterproofing efficacy per IS 13435 (Part 3).

IS 13435 Part 3 — Key Formula and Specifications for Capillary Water Take-up

Specimen Details:

• Size: 240 mm × 240 mm × 45 mm
• Material: Aerated concrete block, density ~500 kg/m³ (per IS 2185 Part 3)

Test Procedure Summary:

• Condition coated slab for 28 days.
• Weigh the slab after conditioning: W₁.
• Immerse slab in water for 24 hours.
• Weigh slab after immersion: W₂.
• Use at least 3 samples for averaging.

Key Formula:

[ \text{Capillary Water Take-up (V_{24})} = 0.204 \times (W_2 - W_1) ]

• (W_1) = Weight after 28 days conditioning (kg)
• (W_2) = Weight after 24 h water immersion (kg)
• (V_{24}) = Capillary water take-up (liters/m²)

Reporting Requirements:

• Date of sample preparation
• Date of water immersion
• Date of testing
• Average capillary water take-up

Notes:

• The factor 0.204 converts weight difference to volume per unit area considering specimen dimensions.
• Ensures waterproofing effectiveness by quantifying water penetration.

flowchart TD
    A[Prepare Specimen] --> B[Condition 28 days]
    B --> C[Weigh specimen: W₁]
    C --> D[Immerse in water 24 h]
    D --> E[Weigh specimen: W₂]
    E --> F[Calculate V₍₂₄₎ = 0.204 × (W₂ - W₁)]
    F --> G[Report results]

This method standardizes capillary water absorption measurement for acrylic polymer waterproofing materials.

IS 13435 Part 3 — Reporting of Results for Capillary Water Take-Up Test

Key Formula:

[ \text{Capillary water take-up} = \frac{W_2 - W_1}{A \times t} ]

Where:

• (W_1) = Weight of coated slab after 28 days conditioning (kg)
• (W_2) = Weight of coated slab after 24 h water immersion (kg)
• (A) = Surface area of specimen (m²)
• (t) = Time period (24 h)

Note: The code gives a simplified factor:
[ = 0.204 \times (W_2 - W_1) ]

Reporting Requirements (Clause 6):

• Date of preparation of sample
• Date of immersion in water
• Date of testing
• Average capillary water take-up from at least three specimens

Specimen Details (from Clause 4.3 & Amendment):

• Size: 240 mm × 240 mm × 45 mm
• Density: 451 to 550 kg/m³
• Material: Aerated concrete blocks as per IS 2185 (Part 3)

Summary Table for Reporting

flowchart TD
    A[Prepare Specimens] --> B[Condition 28 days]
    B --> C[Weigh Specimens (W1)]
    C --> D[Immerse in Water for 24h]
    D --> E[Weigh Specimens (W2)]
    E --> F[Calculate Capillary Water Take-up]
    F --> G[Report Results with Dates and Average]

This ensures consistent, standardized reporting of capillary water absorption in acrylic polymer waterproofing materials per IS 13435 Part 3.

IS 13435 (Part 3) - Notes and Precautions Summary

Key Formula for Capillary Water Take-up:

[ \text{Capillary water take-up} = \frac{W_2 - W_1}{A \times t} ]

Where:

• ( W_1 ) = Weight of coated slab after 28 days conditioning (kg)
• ( W_2 ) = Weight of coated slab after 24 h water immersion (kg)
• ( A ) = Surface area of specimen (m²)
• ( t ) = Time duration (usually 24 h)

Note: The standard gives a simplified factor: [ \text{Capillary water take-up} = 0.204 \times (W_2 - W_1) ]

Specimen Details:

• Size: 240 mm × 240 mm × 45 mm
• Material: Aerated concrete block, density 451 to 550 kg/m³, grade 1 (IS 2185 Part 3)
• Minimum 3 samples for observation

Procedure Notes:

• Condition coated slabs for 28 days before testing.
• Immerse slabs in water for 24 h.
• Weigh slabs before and after immersion.
• Calculate average capillary water take-up from at least 3 samples.

Reporting Requirements:

• Date of sample preparation
• Date of immersion in water
• Date of testing
• Average capillary water take-up

Precautions:

• Use specimens conforming to IS 2185 (Part 3).
• Ensure consistent conditioning and immersion times.
• Use precise weighing instruments.
• Follow IS 2:1960 for rounding off results.

flowchart TD
    A[Prepare Specimens] --> B[Condition for 28 days]
    B --> C[Weigh specimens (W1)]
    C --> D[Immerse in water for 24 h]
    D --> E[Weigh specimens after immersion (W2)]
    E --> F[Calculate capillary water take-up]
    F --> G[Report results with dates & averages]

This ensures reliable and repeatable measurement of water penetration resistance of acrylic polymer coatings.