Recommendations for selection of dairy floor finishes

IS 7956: Scope - Key Points & Specifications

Scope Summary:

• IS 7956 covers standards for industrial floors, focusing on durability and maintenance.
• It aligns with international practices and local field conditions.
• Emphasizes prevention of damage due to impact and dirt accumulation, especially in trucking areas.

Key Specifications

• Rubber Latex Content in Mix:

  • Rubber latex is mixed with cement and aggregate.
  • Latex content varies 8% to 25% by weight of the total mix.
  • (Clause 4.3.5.2)

• Maintenance of Dairy Floors:

  • Avoid dirt crusts in trucking areas to prevent impact stresses.
  • Use rubber mats in severe impact zones to prolong floor life.
  • (Clause 7.1.2, Table 7)

Additional Notes

• The standard references various specifications for specialized cements and mortars:
  • Chemical resistant mortars (Part I & II)
  • Supersulphated cement
  • Portland blast furnace slag cement

Contact & Reference

• Headquarters: Manak Bhavan, New Delhi
• Regional & branch offices available for support and testing.

flowchart LR
    A[Industrial Floor Mix] --> B[Rubber Latex 8-25%]
    B --> C[Cement + Aggregate]
    C --> D[Durable Floor]
    D --> E[Maintenance]
    E --> F{Avoid Dirt Crust}
    E --> G[Use Rubber Mats]

This summary provides the core scope and key mix proportions from IS 7956 for industrial floors. For detailed design and testing, refer to the full standard.

IS 7956: General Requirements for Dairy Floor Finishes

Key Specifications (Clause 2.0):

• Impact & Abrasion Resistance: Must withstand heavy impact, abrasion, and vibration from dairy machinery.
• Chemical Resistance: Resistant to mildly corrosive liquids including milk, milk products, and cleaning detergents.
• Surface Characteristics:
  • Easily cleaned
  • Non-slippery when wet (important for safety)
• Hygienic Conditions: Should not harbor bacteria or dirt; smooth and dustless.
• Repairability: Should allow quick and easy repairs to minimize downtime.

Recommended Properties Summary Table

Additional Notes:

• Floors often use epoxy or polyurethane coatings for durability and chemical resistance.
• Surface roughness should be controlled to balance slip resistance and cleanability.
• Structural base must be sound, level, and free from cracks to support the finish.

flowchart TD
    A[Heavy Machinery Impact] --> B[Floor Finish]
    C[Milk & Detergents] --> B
    B --> D[Non-Slip Surface]
    B --> E[Chemical Resistance]
    B --> F[Easy Cleaning]
    B --> G[Quick Repair]

This ensures a durable, safe, and hygienic dairy floor finish per IS 7956.

IS 7956: Structural Base in Dairy Floor - Key Specifications

1. Slope for Structural Base (Clause 3.1.1)

• Minimum slope: 1 in 80 (1.25%)
• Purpose: Ensure quick drainage of liquid spillage to nearest drain by shortest route.

2. Waterproofing

• A waterproof membrane must be placed between the structural base and the floor finish to prevent moisture ingress.

3. Surface Preparation

• Remove all laitance from the concrete base.
• Roughen the surface before applying floor finish to ensure proper bonding.

4. Joints

• Provide joints as per IS 3414-1968 for concrete floors to control cracking.

5. Floor Finish Requirements (Clause 4)

• Withstand heavy impact, abrasion, and vibration.
• Resistant to mildly corrosive liquids.
• Non-slippery surface, even when wet.
• Easy to clean and hygienic.
• Quick repairability.

Summary Table: Structural Base Requirements

flowchart LR
    A[Structural Base] --> B[Slope ≥ 1 in 80]
    A --> C[Waterproof Membrane]
    A --> D[Surface Preparation]
    D --> E[Remove Laitance]
    D --> F[Roughen Surface]
    A --> G[Joints per IS 3414]
    A --> H[Floor Finish]
    H --> I[Impact & Abrasion Resistant]
    H --> J[Non-Slip & Hygienic]
    H --> K[Easy to Clean & Repair]

This ensures a durable, hygienic, and safe dairy floor structure as per IS 7956.

IS 7956: Recommendations for Dairy Floor Finishes

Key Points on Classification & Recommendations:

• Floor Conditions:

  • Heavy abrasion & impact from machinery.
  • Chemical attack from milk, milk products, and detergents.
  • Special needs: non-slippery, dustless, noiseless, easy to clean.

• General Requirements:

  • Floors must resist heavy impact and chemical attack.
  • Proper drainage design is essential.
  • Damp-proofing of structural floor is necessary.
  • For dairies processing ≤10,000 litres/day, alternative finishes may be used.

Recommended Floor Finishes by Dairy Section (Typical Guidance):

Additional Notes:

• Floors must be designed with proper slope (1-2%) for drainage.
• Use acid-resistant materials due to milk acidity.
• Surface finish should minimize slip hazards and facilitate cleaning.

flowchart LR
    A[Milk Reception] -->|Non-slip, Acid-resistant| B[Processing Area]
    B -->|Abrasion & Chemical Resistance| C[Packaging]
    C -->|Smooth, Dustless| D[Storage]
    D -->|Durable Concrete| A

Summary: Select floor finishes based on abrasion, chemical exposure, and hygiene needs, ensuring durability and ease of maintenance per IS 7956 guidelines.

Waterproof Membrane for Dairy Floors (IS 7956 Key Points)

• Purpose: Prevent leakage of effluents to base concrete; protect reinforcement from corrosion.

• Membrane Requirements:

  • Resistant to mild acids and alkalis.
  • Should shed liquids quickly to drains without permeating walls.
  • Acts as a second defense behind the floor finish.

• Common Membrane Type:

  • Acid-resistant bitumen mastic over saturated bitumen felt (IS:1322-1970) or fiberglass-based saturated bitumen felt (IS:7193-1974).
  • Isolated from the building base to avoid movement stresses.
  • Refer IS:1196-1968 for laying bitumen mastic floors.

• Structural Base:

  • Minimum slope: 1 in 80 to ensure drainage.
  • Surface must be roughened and laitance removed before membrane application.
  • Joints per IS:3414-1968.

• Floor Finish Options over Membrane:

  • Ceramic unglazed vitreous acid-resistant tiles (IS:4457-1967).
  • Acid-resistant bricks (IS:4860-1968).
  • Granolithic concrete floor topping.

Summary Table: Waterproof Membrane Specification

flowchart TD
    A[Structural Base Concrete]
    B[Surface Preparation: Remove Laitance, Roughen]
    C[Waterproof Membrane Layer]
    D[Floor Finish (Tiles / Bricks / Granolithic)]
    E[Drainage with Slope 1:80]

    A --> B --> C --> D --> E

This layered system ensures durability, hygiene, and protection against effluent leakage in dairy floors.

Drainage in Dairies — IS 7956 Key Points

1. Floor Slope & Drainage (Clause 3.1.1)

• Minimum slope: 1 in 80 (1.25%) towards drains.
• Ensures quick flow of liquid spillage to nearest drain by shortest route.
• Waterproof membrane mandatory between base concrete and floor finish.

2. Floor Finish & Membrane (Clause 5.1)

• Floor finish must prevent effluent leakage to base concrete.
• Use acid-resistant bitumen mastic membrane on saturated bitumen felt or fiberglass felt (IS:1322-1970, IS:7193-1974).
• Membrane sheds liquids to drains, prevents wall permeation.
• Recommended floor finishes: granolithic concrete, cement concrete tiles, ceramic unglazed acid-resistant tiles, acid-resistant bricks.

3. Drain Material & Joints (Clause 6.5)

• Use chemically resistant salt-glazed pipes or similar chemical-resistant tiles.
• Joints made with chemical resistant resin mortar.

Summary Table

flowchart LR
    FloorSurface -->|Slope 1:80| Drain
    FloorSurface -->|Effluent| Membrane
    Membrane -->|Prevents leakage| BaseConcrete
    Drain -->|Salt-glazed pipes| Outlet

References:

• IS 7956 Clauses 3.1.1, 5.1, 6.5
• IS 1322-1970, IS 7193-1974 (bitumen felts)
• IS 3414-1968 (joint details for structural base)

IS 7956: Maintenance of Dairy Floors – Key Points

General Requirements for Dairy Floor Finishes (Clause 2.0)

• Durability: Resist heavy impact, abrasion, and vibration from machinery.
• Chemical Resistance: Withstand mildly corrosive liquids (e.g., milk acids, detergents).
• Safety: Non-slippery surface even when wet, facilitating easy cleaning.
• Hygiene: Maintain good hygienic conditions to prevent contamination.
• Repairability: Allow quick repairs to minimize downtime.

Design Considerations

• Structural Base: Proper design of the structural floor with damp-proofing is essential to prevent moisture ingress and damage.
• Drainage: Adequate slope and drain design to avoid water pooling, typically a minimum slope of 1:100 towards drains.
• Floor Finish Selection: Should be matched to the structural base and expected load/chemical exposure.

Typical Floor Finishes (Qualitative)

• Cement Concrete: High durability, good abrasion resistance.
• Epoxy Resin Coatings: Chemical resistant, smooth, hygienic.
• Terrazzo: Durable and hygienic but may be slippery when wet.
• Rubberized Floors: Good impact absorption and slip resistance.

Quick Reference Table: Floor Slope and Drainage

flowchart LR
    A[Structural Floor] --> B[Damp-proof Treatment]
    B --> C[Floor Finish]
    C --> D[Drainage System]
    D --> E[Efficient Water Removal]

Summary: Select floor finishes that balance durability, hygiene, safety, and repairability. Ensure structural base and drainage design comply with IS 7956 recommendations for long-lasting, low-maintenance dairy floors.