Specification for concrete slump test apparatus

IS 7320: Scope & Key Specifications for Concrete Slump Test Apparatus

Scope:
IS 7320 specifies the requirements for the concrete slump test apparatus, ensuring reliable and comparable test results using standardized equipment.

Key Specifications (Clause 3.1 & Table 1)

• Mould Shape: Frustum of a cone (Fig. 1 or 2 in IS 7320)
• Material: Seamless or with seam mould allowed
• Thickness: Minimum 1.6 mm (Clause 1.6)
• Tolerance Note: Diameter and height measured anywhere on the mould shall not deviate beyond the specified tolerance.

Additional Notes:

• Tamping Bar: Steel bar, 16 mm diameter, 600 mm length, rounded working end (Amendment 1984).
• Rounding Off: Final test values rounded as per IS 2-1960.

flowchart TD
    A[Mould Shape] --> B[Frustum of Cone]
    B --> C[Bottom Diameter: 200 mm ± Tolerance]
    B --> D[Top Diameter: 100 mm ± Tolerance]
    B --> E[Height: 300 mm ± 1.5 mm]
    F[Tamping Bar] --> G[16 mm diameter, 600 mm length]

This ensures standardized slump testing for concrete consistency evaluation.

IS 7320: Apparatus Components for Concrete Slump Test

1. Mould Dimensions (Clause 3.1, Table 1)

The mould is a frustum of a cone with internal dimensions:

• Note: Diameter and height measured anywhere on the mould must not differ beyond these tolerances.

2. Shape

• The mould shape is a truncated cone (frustum), as shown in IS 7320 Fig. 1 or 2 (not provided here).

3. Tamping Bar (Amendment 1984)

• The tamping rod is now referred to as a tamping bar.
• It is used for compacting concrete in the mould.

Summary Diagram of Mould Shape

graph TD
    A[Top Diameter = 100 mm] --> B[Height = 300 mm]
    B --> C[Bottom Diameter = 200 mm]
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#bbf,stroke:#333,stroke-width:2px
    style C fill:#f96,stroke:#333,stroke-width:2px

Key Takeaway: Use the frustum mould with specified dimensions and tolerances for slump testing concrete consistency, and use a tamping bar for compaction as per IS 7320.

IS 7320: Mould Specifications for Slump Test

Key Dimensions (Clause 3.1 & Table 1)

• Thickness: Minimum 1.6 mm (Clause 1.6)
• Shape: Frustum of a cone (Fig. 1 seamless or Fig. 2 with seam)
• Top & Bottom: Open, parallel, and perpendicular to cone axis (Clause 3.3.1)
• Surface: Smooth, free from dents/protrusions (Clause 3.3.1)
• Handles & Foot Pieces: Provided for easy lifting; riveted/welded/brazed; rivets countersunk inside (Clause 3.3.2)

Notes:

• Diameter and height measured anywhere on the mould must be within specified tolerances.
• Mould may clamp to non-absorbent base plate if conforming to specs.

flowchart LR
    A[Mould Shape] --> B[Frustum of Cone]
    B --> C[Bottom Diameter 200 ± tolerance]
    B --> D[Top Diameter 100 ± tolerance]
    B --> E[Height 300 ± tolerance]
    B --> F[Thickness ≥ 1.6 mm]
    B --> G[Open Top & Bottom]
    B --> H[Smooth Internal Surface]
    B --> I[Handles & Foot Pieces]

This ensures consistent and reliable slump test results per IS 7320.

IS 7320 - Shape and Dimensions of Slump Test Mould

Key Specifications (Clause 3.1 & Table 1)

• Thickness: Minimum 1.6 mm (Clause 1.6)
• Shape: Frustum of a cone (Fig. 1 & 2)
• Top & Bottom: Open, parallel, and perpendicular to the axis (Clause 3.3.1)
• Surface: Smooth internal surface, free from dents and projections

Notes:

• Diameter and height measured anywhere on the mould must not deviate beyond the specified tolerances.
• Where no tolerance is specified, the nominal dimension applies (Clause 3.1.1).

Diagram of Mould Shape (Frustum of Cone)

flowchart TB
    A[Top Diameter = 100 mm] --> B[Height = 300 mm]
    B --> C[Bottom Diameter = 200 mm]
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#bbf,stroke:#333,stroke-width:2px
    style C fill:#f96,stroke:#333,stroke-width:2px

This ensures consistent and standardized slump test results by maintaining precise mould geometry.

IS 7320 - Material Specifications for Concrete Slump Test Mould

Key Specifications (Clause 3.2)

• Material: Galvanized iron sheet or other suitable metal resistant to cement paste.
• Not Allowed: Aluminium.
• Thickness: Minimum 1.6 mm.

Mould Dimensions (Clause 3.1 & Table 1)

• Dimensions apply anywhere on the mould surface.
• Shape: Frustum of a cone (see Fig. 1 or 2 in IS 7320).

Notes

• The mould must be seamless or with a seam but conforming to dimensional tolerances.
• Material must withstand chemical attack from cement paste and maintain shape integrity.

flowchart TB
    A[Mould Material] -->|Galvanized Iron Sheet| B[Thickness ≥ 1.6 mm]
    A -->|Other Suitable Metal| B
    A -->|Aluminium| C[Not Allowed]
    B --> D[Shape: Frustum of Cone]
    D --> E[Bottom Diameter: 200 mm ± tolerance]
    D --> F[Top Diameter: 100 mm ± tolerance]
    D --> G[Height: 300 mm ± tolerance]

This ensures durability and accuracy in slump test results as per IS 7320-1974.

IS 7320: Concrete Slump Test Apparatus - Key Construction Specifications

1. Mould Shape & Dimensions (Clause 3.1 & Table 1)

• Shape: Frustum of a cone (Fig. 1 or 2)
• Internal Dimensions:

• Diameter and height anywhere on the mould must not deviate beyond these tolerances.

2. Construction (Clause 3.3)

• Mould can be made with or without a seam.
• If a seam is present, it must follow the design shown in Fig. 2 (typically a lap or welded seam ensuring no leakage).

3. Material & Finish

• Typically made of steel or metal with smooth internal surfaces to avoid adhesion of concrete.
• Rounding off of edges as per standard practice to avoid sharp corners.

flowchart TD
    A[Mould Construction] --> B{Seam?}
    B -->|Yes| C[Seam as per Fig. 2]
    B -->|No| D[Seamless mould]
    A --> E[Dimensions as per Table 1]
    E --> F[Bottom diameter: 200 mm ± tolerance]
    E --> G[Top diameter: 100 mm ± tolerance]
    E --> H[Height: 300 mm ± tolerance]

This ensures reliable and repeatable slump test results as per IS 7320:1974.

IS 7320 - Tamping Bar Specifications

• Dimensions:

  • Diameter = 16 mm (round steel bar)
  • Length = 600 mm

• Tip Shape:

  • Rounded working end with a hemispherical tip of diameter 16 mm.

• Material:

  • Steel, straight and round.

• Relevant Clauses:

  • Clause 4.1: Defines the tamping bar size and shape.
  • Clause 2.1 (Amendment): Specifies apparatus includes mould and tamping bar.

Summary Table

Usage Context:

• Used for compacting concrete in slump test molds to ensure consistent compaction.

graph LR
A[Tamping Bar] --> B[Steel Round Bar]
A --> C[Diameter: 16 mm]
A --> D[Length: 600 mm]
A --> E[Hemispherical Tip, 16 mm dia]

This ensures uniform compaction and reliable slump test results per IS 7320.

IS 7320 - Dimensions and Shape of Slump Test Mould

Mould Shape

• Frustum of a cone (Fig. 1 seamless or Fig. 2 with seam)
• Internal dimensions per Table 1

Table 1: Internal Dimensions of Mould

• Diameter and height anywhere on the mould must be within specified tolerances.
• Minimum thickness of mould: 1.6 mm (Clause 1.6)
• All dimensions in millimeters.

Notes:

• Nominal dimensions are 200 mm (bottom dia), 100 mm (top dia), and 300 mm (height).
• Tolerances ensure uniformity and accuracy for slump testing.

flowchart TD
    A[Mould Shape: Frustum of Cone] --> B[Bottom Diameter: 200 mm ± Tolerance]
    A --> C[Top Diameter: 100 mm ± Tolerance]
    A --> D[Height: 300 mm ± Tolerance]
    style B fill:#f9f,stroke:#333,stroke-width:1px
    style C fill:#f9f,stroke:#333,stroke-width:1px
    style D fill:#f9f,stroke:#333,stroke-width:1px

This ensures the slump test apparatus meets IS 7320 standards for consistent and reliable concrete workability testing.

IS 7320 - Marking Specifications (Clause 5.1 & 5.1.1-5.1.2)

• Marking on Apparatus:

  • Must include:
    • Manufacturer's name and/or registered trademark
    • Date of manufacture
  • Marking should be clear, indelible, and not affect apparatus performance.

• Standard Mark:

  • Apparatus may bear the Standard Mark as per BIS Act, 1986.
  • Use governed by BIS licensing rules.

Summary Table for Marking Requirements

Related Mould Dimensions (Clause 3.1 & Table 1)

flowchart TD
    A[Apparatus] --> B[Marking]
    B --> C[Manufacturer's Name/Trademark]
    B --> D[Date of Manufacture]
    B --> E[Standard Mark (optional)]
    style C fill:#f9f,stroke:#333,stroke-width:1px
    style D fill:#f9f,stroke:#333,stroke-width:1px
    style E fill:#ccf,stroke:#333,stroke-width:1px

Note: For licensing and detailed conditions on Standard Mark use, contact BIS regional offices listed in the standard.

IS 7320 - Information to be Marked on Mould and Rod

Key Marking Requirements (Clause 5.1):

• Mandatory Markings:
  • Name of manufacturer or registered trade-mark or both.
  • Date of manufacture.
• Markings must be clear, indelible, and not interfere with apparatus performance.

Optional Marking (Clause 5.1.1):

• The apparatus may be marked with the Standard Mark as per BIS regulations.

BIS Standard Mark License (Clause 5.1.2):

• Use governed by the Bureau of Indian Standards Act, 1986.
• Licenses and conditions available from BIS offices (contact details provided in the code).

Summary Table for Marking Information:

Additional Notes:

• Marking location: On mould and rod.
• Marking method: Should not affect apparatus function.
• For licensing and Standard Mark details, contact BIS regional/branch offices.

If you need mould dimensions or other specs, refer to Table 1 of Clause 3.1 for mould internal dimensions.

flowchart TD
    A[Start: Manufacture] --> B[Mark Manufacturer's Name & Date]
    B --> C{Use Standard Mark?}
    C -->|Yes| D[Mark Standard Mark as per BIS]
    C -->|No| E[No Standard Mark]
    D --> F[Ensure markings do not affect performance]
    E --> F
    F --> G[Final Product Ready]

IS 7320 — Standard Mark Key Points

Clause 5.1.1 & 5.1.2: Standard Mark Usage

• The apparatus may be marked with the Standard Mark as per IS 7320.
• Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• Licence conditions for the Standard Mark are available from the BIS office.

Contact Details for BIS (for Standard Mark licensing)

Summary:

• Standard Mark indicates compliance with IS 7320.
• Manufacturers must obtain a licence from BIS.
• Marking ensures quality assurance and standardization.

Additional: Mould Dimensions (Clause 3.1 & Table 1)

Note: Diameter and height anywhere on the mould must be within specified tolerances.

flowchart LR
    A[Manufacturer] --> B[Apply for BIS Licence]
    B --> C[Obtain Standard Mark Licence]
    C --> D[Mark Apparatus with Standard Mark]
    D --> E[Assured Quality & Compliance]

For full licensing details, contact the nearest BIS office listed above.

IS 7320: Tolerances for Concrete Slump Test Mould Dimensions

Key Tolerances (Clause 3.1 & Table 1)

• Note: Diameter and height measured anywhere on the mould must not deviate beyond these tolerances from nominal values.

Important Specifications

• Mould shape: Frustum of a cone (see Fig. 1 & 2 in IS 7320).
• Dimensions must follow the nominal values with above tolerances.
• No tolerance specified means nominal dimension is referenced (Clause 3.1.1).

Summary of Tolerance Application

flowchart TD
    A[Nominal Dimension] --> B{Tolerance Specified?}
    B -- Yes --> C[Apply Tolerance Limits]
    B -- No --> D[Use Nominal Dimension]
    C --> E[Check dimension within + / - tolerance]
    E --> F[Accept if within limits]
    E --> G[Reject if outside limits]

Use these tolerances strictly for manufacturing slump test moulds to ensure test accuracy and repeatability.

IS 7320 - Key Notes, Tables & Specifications Summary

1. Mould Dimensions (Clause 3.1, Table 1)

• Shape: Frustum of a cone (Fig. 1 or 2)
• Internal Dimensions:

• Note: Diameter and height anywhere on the mould must not deviate beyond tolerances.

2. Amendment Highlights (March 1984)

• Terminology changed from "tamping rod" to "tamping bar" (Clause 2.1, 4.1).

3. Marking & Licensing (Clause 5.1.2)

• Use of Standard Mark governed by Bureau of Indian Standards Act, 1986.
• Licensing details available from BIS.

4. General Notes

• The mould is critical for slump test accuracy.
• Tolerances ensure uniformity in test results.
• The document includes detailed committee and contact info for BIS offices.

Visual: Mould Shape (Frustum of Cone)

graph TD
A[Top Diameter 100 mm] --> B[Frustum Shape]
B --> C[Bottom Diameter 200 mm]
B --> D[Height 300 mm]

For detailed procedures, follow IS 7320:1974 and its amendments.