Specification for flow table for use in tests of hydraulic cement and pozzolanic materials

IS 5512: Scope & Key Specifications for Flow Table Apparatus

Scope (Clause 2.1 & 3.1)

• Specifies materials and dimensions for flow table components.
• Dimensions follow Fig. 1 with tolerances as per IS 2102-1969 (Coarse class).
• Final test values rounded as per IS 2-1960.

Materials for Components (Table 1)

Dimensional Highlights (from Fig. 1)

• Drop height: 12.0 ± 1.10 mm
• Hole diameter in base: 36 mm
• Scribe lines depth: ~2 mm at 60° tool angle
• Handle is free rotating at drop position.

Notes:

• Use IS 2102-1969 for dimensional tolerances.
• Round off test results per IS 2-1960.

flowchart TB
    A[Flow Table Apparatus] --> B[Table (Cast Brass)]
    A --> C[Supporting Frame (Cast Iron)]
    A --> D[Mould (Cast Brass)]
    A --> E[Cam (Case-hardened Mild Steel)]
    A --> F[Cam Shaft (Mild Steel)]
    A --> G[

IS 5512 - Materials for Flow Table Apparatus (Clause 2.1 & Table 1)

Key Notes:

• Hardness values: HRB = Rockwell B scale; HRC = Rockwell C scale; HV = Vickers hardness.
• Materials ensure durability and wear resistance for precise flow table operation.
• Case hardening on cams and shafts improves surface wear resistance.

Reference IS Codes:

• IS 292-1961: Brass ingots and castings
• IS 210-1978: Grey iron castings
• IS 1570-1961: Wrought steels for general engineering

flowchart LR
    A[Flow Table Apparatus] --> B[Table (Cast Brass)]
    A --> C[Supporting Frame (Cast Iron)]
    A --> D[Mould (Cast Brass)]
    A --> E[Cam (Mild Steel, Case Hardened)]
    A --> F[Cam Shaft (Mild Steel)]
    A --> G[Vertical Shaft (Mild Steel, Case Hardened)]
    A --> H[Base Plate (Cast Iron or Steel)]

This ensures standardized, wear-resistant construction for reliable hydraulic cement testing.

IS 5512: Key Formulas, Tables & Specifications for Dimensions and Construction

1. Dimensions & Tolerances (Clause 3.1 & Fig. 1)

• Table diameter: 250 ± 2.5 mm
• Vertical drop: 12 mm ± 0.1 mm (new), ± 0.4 mm (in use)
• Hole diameter in base: 36 mm
• Scribe lines depth: ~2 mm with 60° tool
• Drop height adjustment: 12.0 ± 1.10 mm
• Tolerances follow Coarse class deviation per IS 2102-1969

2. Materials (Table 1, Clause 2.1)

3. Construction Highlights (Clause 4.1 & 5.2.5)

• Rigid integrally cast iron frame.
• Circular rigid table top with screw-attached vertical shaft.
• Vertical drop controlled by cam mechanism.
• Free rotating handle for manual drive.
• Shaft and cam surfaces case-hardened for wear resistance.

Summary Diagram of Flow Table Components

graph TD
    A[Supporting Frame (Cast Iron)] --> B[Table Top (Cast

IS 5512: Flow Table Assembly and Mounting Key Points

1. Flow Table Dimensions (Clause 4.1 & 3.1)

• Table Top Diameter: 250 ± 2.5 mm (circular rigid top)
• Vertical Drop Height: 12 mm ± 0.1 mm (new table), ± 0.4 mm (in use)
• Mounting: Table top fixed perpendicular on a shaft with integral contact shoulder
• Tolerance: Coarse class deviation as per IS 2102-1969

2. Flow Table Mounting (Clause 4.2)

• Table mounted on a rigid iron frame allowing vertical drop via a rotated cam
• Drop height precisely controlled (12.0 ± 0.1 mm)
• Shaft and frame designed for free rotation and smooth vertical movement

3. Construction Details (Fig. 1 Highlights)

• Scribing: 3 scribe lines on table face, 60° apart, 2 mm depth
• Hole in Base: 36 mm diameter for mounting
• Handle: Free rotating for manual drive, positioned for drop action

Summary Table

flowchart TB
    A[Flow Table Assembly] --> B[Rigid Iron Frame]
    B --> C[Vertical Shaft with Contact Shoulder]
    C --> D[Table Top (250 mm dia)]
    B --> E[Rotated Cam Mechanism]
    E --> F[Vertical Drop 12 mm ± tolerance]
    D --> G[Scribe Lines (3 lines, 60° apart)]
    B --> H[Base with 36 mm hole]
    B --> I[Free Rotating Handle]

This setup ensures consistent flow table operation for concrete flowability testing per IS 5512.

IS 5512: Performance Requirements for Flow Table

Key Performance Clause (5.1)

• Flow value accuracy: Calibration tests must show flow values within ±5% of standard calibration material flow values.
• This ensures reliable and consistent flow measurement for hydraulic cement and pozzolanic materials.

Materials Specification (Clause 2.1 & Table 1)

Additional Notes

• Optional features: counter for drops & motor cutoff after set drops.
• Hardness requirements ensure durability and precision of moving parts.
• Material flexibility allowed for cam and shafts to optimize manufacturing.

flowchart LR
    A[Flow Table Performance] --> B[Calibration Test]
    B --> C{Flow Value within ±5%?}
    C -- Yes --> D[Performance Satisfactory]
    C -- No --> E[Recalibrate or Repair]

Summary: IS 5512 mandates ±5% accuracy in flow values and specifies robust materials with hardness criteria to ensure durability and consistent performance of flow tables used in cement testing.

IS 5512: Lubrication of Flow Table — Key Specifications & Details

Clause 6 (Lubrication):

• The code emphasizes proper lubrication of the flow table's moving parts, especially the cam and vertical shaft, to ensure smooth operation and minimize wear.

Key Specifications from Clause 4.1.2:

• Wearing surfaces of cam tip and vertical shaft must be case hardened (depth ~6 mm).
• Shaft diameter clearance with bore:
  • New tables: 0.05 mm to 0.075 mm
  • In use: 0.05 mm to 0.125 mm
• The cam surface: smooth spiral curve with radius increasing uniformly from 12 mm to 30 mm over 360° rotation.
• Shaft contact with cam occurs not less than 120° from drop point to avoid impact.
• Surfaces in contact at drop end must be smooth, plane, horizontal, and parallel for full 360° continuous contact.

Lubrication Best Practices (Engineering Knowledge)

• Use high-quality grease or oil suitable for case-hardened steel surfaces to reduce friction and wear.
• Lubricate cam-vertical shaft interface regularly to maintain smooth spiral motion and prevent jamming.
• Ensure lubrication does not contaminate test materials on the flow table.

Summary Table: Shaft Diameter Clearance

flowchart LR
    A[Vertical Shaft] -->|Case Hardened| B[Cam Surface]
    B -->|Smooth Spiral (12-30 mm radius)| C[Rotation 360°]
    A -->|Lubrication| D[Reduced Friction & Wear]
    C --> E[Flow Table Operation]

Note: Proper lubrication ensures the flow table meets the 5% accuracy tolerance in flow value calibration (Clause 5.1).

IS 5512 - Marking Requirements for Flow Table Components

Key Marking Specifications (Clause 7.1 & 7.1.1)

• Mandatory Markings on Each Component:

  • Manufacturer's name or registered trademark (or both)
  • Date of manufacture

• Marking must be clear, suitable, and not affect flow table performance.

• Optional Marking:

  • The Standard Mark may be applied, indicating BIS certification and compliance.

Notes on Standard Mark:

• Governed by Bureau of Indian Standards Act, 1986.
• Implies quality control, inspection, and testing under BIS supervision.
• Continuous conformity checks by BIS.
• License conditions for Standard Mark use available from BIS.

Materials for Flow Table Components (Table 1, Clause 2.1):

Summary Diagram of Marking Placement

flowchart LR
    A[Flow Table Component] --> B[Mark Manufacturer Name/Trademark]
    A --> C[Mark Date of Manufacture]
    A --> D[Optional: BIS Standard Mark]
    style B fill:#f9f,stroke:#333,stroke-width:1px
    style C fill:#bbf,stroke:#333,stroke-width:1px
    style D fill:#bfb

IS 5512: Accessories for Flow Table Apparatus

Key Specifications (Clause 4.3 & 2.1)

Dimensional & Functional Highlights (Clause 52.5 & Figures)

• Drop height: Adjusted to give a drop of 12.0 ± 1.0 mm
• Hole in base: 36 mm diameter
• Scribe lines: On table face with 60° tool, depth ~2 mm
• Handle: Free rotating, position critical at drop time
• Supporting frame: Internal diameter (ID) specified for vertical shaft (IC)

Summary Diagram of Accessories

graph TD
    A[Base Plate] --> B[Supporting Frame]
    B --> C[Vertical Shaft]
    C --> D[Cam & Cam Shaft]
    A --> E[Table with Scribe Lines]
    E --> F[Handle (Free Rotating)]
    E --> G[Mould]

Notes

• Materials and hardness ensure durability and precision.
• Optional: counter for drop recording and motor switch-off device.
• Outside caliper is not mandatory as per latest revision.

This concise summary aligns with IS 5512 for accessory apparatus in flow table equipment.

IS 5512: Calibration of Flow Table — Key Points

1. Calibration Performance (Clause 5.1)

• The flow table is satisfactory if the flow value from calibration tests differs by no more than 5% from the flow values obtained using a standard calibration material.

2. Materials for Flow Table Components (Clause 2.1 & Table 1)

3. Dimensional Tolerances (Clause 3.1)

• Dimensions and tolerances follow Fig. 1 (not provided here).
• Deviations as per coarse class in IS: 2102-1969.
• Values rounded per IS: 2-1960.

Summary Formula for Calibration Acceptance:

[ \left| \frac{Q_{\text{test}} - Q_{\text{standard}}}{Q_{\text{standard}}} \right| \leq 0.05 ]

Where:

• ( Q_{\text{test}} ) = Flow value from the flow table under test
• ( Q_{\text{standard}} ) = Flow value from standard calibration material

If needed, lubrication and other construction details are in later clauses but are not specified here.

flowchart TD
    A[Flow

IS 5512: Drive Mechanism for Flow Table

Key Specifications (Clauses 4.1.1 to 4.1.4)

• Drive Speed: Cam shaft speed ≈ 100 rev/min.
• Drive Options:
  • Manual by hand wheel on cam shaft.
  • Motor-driven via enclosed worm gear speed reducer + flexible coupling.
• Motor Power: Suitable motor rating is 40 W.
• Mounting: Motor drive must NOT be fastened to table base/frame.
• Counter & Switch: Optional counter for drops and auto motor switch-off device.

Cam and Vertical Shaft (Clause 4.1.2)

• Cam Profile: Smooth spiral curve with radius increasing uniformly from 12 mm to 30 mm in 360°.
• Shaft-Bore Clearance:
  • New tables: 0.05 to 0.075 mm
  • In use: 0.05 to 0.125 mm
• Contact: Shaft contact with cam ≥ 120° away from drop point.
• Rotation Limit: Max 1 revolution per 25 drops.
• Surface Hardening: Cam tip and shaft wearing surfaces case hardened (~6 mm depth).

Dimensional Highlights (Fig. 1 & Clause 4.1.1)

Summary Diagram of Drive Mechanism

graph LR
  Motor[Motor (40 W)] -->|Worm Gear Reducer| WormGear[Enclosed Worm Gear]
  WormGear -->|Flexible Coupling| CamShaft[Cam Shaft (100 rpm)]
  CamShaft -->|Drives| FlowTable[Flow Table]
  HandWheel[Hand Wheel (Manual Drive)] --> CamShaft

Note: Maintain smooth, plane, and horizontal contact surfaces for reliable operation and minimal wear.

IS 5512: Maintenance and Inspection of Flow Table

Performance Check (Clause 5.1):

• Flow value from calibration tests must not differ by more than ±5% from standard calibration material.

Lubrication & Materials (Clause 2.1 & Table 1)

Key Inspection Points:

• Calibration: Verify flow values within ±5% tolerance.
• Material Hardness: Confirm hardness levels of components as per table.
• Lubrication: Ensure cam and shafts are well lubricated to avoid wear.
• Drop Count: Optional counter device recommended for drop monitoring.

flowchart LR
    A[Calibration Test] -->|Flow value ±5%| B[Performance Satisfactory]
    B --> C[Material Hardness Check]
    C --> D[Lubrication of Cam & Shafts]
    D --> E[Drop Counter Device (Optional)]
    E --> F[Routine Maintenance]

This ensures reliable flow table operation per IS 5512 standards.