Masonry cement – Specification

IS 3466: Introduction and Scope - Key Points

Scope:

• Covers specifications for masonry cement.
• Defines physical, chemical, and mechanical requirements.
• Applies to cement packed in bags, with sampling and tolerance criteria.

Key Specifications & Tables

Sampling & Tolerance for Cement Bags

• Tolerance on net mass for 20-25 tonnes load: 0 to +0.5%

Notes:

• Standard sand for testing conforms to IS 650-1965.
• Sampling must be random as per IS 4905-1968.

flowchart TD
    A[Masonry Cement] --> B[Physical Properties]
    A --> C[Mechanical Properties]
    A --> D[Sampling & Tolerance]
    B --> E[Fineness, Setting Time, Soundness]
    C --> F[Compressive Strength, Air Content, Water Retention]
    D --> G[Sample Size & Tolerance Tables]

This summary covers the scope, key physical and mechanical requirements, and sampling/tolerance criteria from IS 3466.

IS 3466: Scope - Key Specifications & Tables

Scope:
IS 3466 specifies requirements for masonry cement used in masonry construction.

Key Physical Requirements (Table 1, Clause 3.1.1)

Standard sand conforms to IS 650:1965.

Sampling for Cement Bags (Appendix A, Clause 8.2)

Tolerance for wagon/truck load (20-25 tonnes): 0 to +0.5% on net mass.

Summary Diagram (Masonry Cement Quality Control)

flowchart TD
    A[Masonry Cement] --> B[Fineness ≤ 15% residue]
    A --> C[Setting Time: Initial ≥ 90 min, Final ≤ 24 h]
    A --> D[Soundness: Le-Chatelier ≤ 10 mm, Autoclave ≤ 1%]
    A --> E[Compressive Strength: 7d ≥ 2.5 MPa, 28

IS 3466: Definitions & Key Specifications for Masonry Cement

Key Physical Requirements (Clause 3.1.1, Table 1)

Standard sand conforms to IS 650:1965.

Tolerance on Cement Bag Mass (Clause 8.2, Appendix A)

• For wagon/truck loads (20-25 tonnes), tolerance on net mass: 0 to +0.5%

Notes:

• Mortar cube size: 50 mm cubes for compressive strength testing.
• Sampling: Random selection per IS 4905:1968.
• Setting time measured by Vicat apparatus.

flowchart TD
    A[Masonry Cement] --> B[Fineness ≤ 15% residue]
    A --> C[Setting Time: Initial ≥ 90 min, Final ≤ 24 hrs]
    A --> D[Soundness: Le-Chatelier ≤ 10 mm, Autoclave ≤ 1%]
    A --> E[Compressive Strength: 7d ≥ 2.5 MPa

IS 3466: Physical Requirements for Masonry Cement

Notes:

• Standard sand must conform to IS 650-1965.
• Mortar cubes used for strength tests are 50 mm size.
• Vicat apparatus is used for setting time measurement.
• Soundness tests ensure volume stability of cement.

Sample Size for Bag Mass Testing (Appendix A, Clause 8.2)

This summary ensures compliance with IS 3466 physical requirements for masonry cement quality control.

IS 3466: Non-staining Masonry Cement - Key Specifications & Physical Requirements

• Standard sand must conform to IS 650:1965.
• Clause 7.1: Specify if non-staining masonry cement is required; otherwise, ordinary masonry cement requirements apply.

Notes:

• Mortar cubes for compressive strength: 50 mm size.
• Testing methods per IS 4031:1988.
• Ensures durability, workability, and minimal staining in masonry applications.

flowchart TD
    A[Masonry Cement] --> B[Fineness ≤ 15%]
    A --> C[Setting Time: Initial ≥ 90 min, Final ≤ 24 h]
    A --> D[Soundness: Le-Chatelier ≤ 10 mm, Autoclave ≤ 1%]
    A --> E[Compressive Strength: 7d ≥ 2.5 MPa, 28d ≥ 5 MPa]
    A --> F[Air Content ≥ 6%]
    A --> G[Water Retention ≥ 60%]
    B & C & D & E & F & G --> H[Conforms to IS 3466 for Non-staining Masonry Cement]

This summary aids specification, testing, and quality control for non-staining masonry cement per IS 3466.

IS 3466: Storage and Handling of Cement - Key Points

Storage (Clause 5.1)

• Cement must be stored in a weather-tight building to prevent moisture ingress.
• Storage should allow easy access for inspection and identification.
• Protect cement from dampness to minimize deterioration.

Sampling and Testing (Clause 9.1.1)

• If testing cannot be done within 4 weeks of delivery, samples must be stored in airtight containers.

Manufacturer's Certificate (Clause 3.1.1, Table 1)

Tolerances on Packed Cement Mass (Appendix A, Clause 1.2)

• For 20-25 tonnes wagon/truck loads, tolerance is 0 to +0.5% on net mass.

Summary Diagram: Cement Storage Flow

flowchart TD
    A[Receive Cement] --> B[Store in Weather-tight Building]
    B --> C[Allow Easy Access for Inspection]
    B --> D[Protect from Dampness]
    D --> E[Sample for Testing]
    E --> F{Test within 4 weeks?}
    F -- Yes --> G[Test Cement]
    F -- No --> H[Store Sample in Airtight Container]

Note: Use standard sand per IS 650 for testing. Proper storage and handling ensure cement quality and durability.

IS 3466: Manufacturer's Certificate Key Specifications

Additional Notes:

• Standard sand must conform to IS 650-1965.
• Cement storage must be weather-tight to avoid deterioration (Clause 5.1).
• Sampling for bag mass tolerance follows Appendix A; sample sizes depend on batch size (see table below).

• Mass tolerance for wagon/truck loads (20-25 tonnes): 0 to +0.5% (Clause 8.2).

Summary Diagram: Cement Quality Checks Flow

flowchart TD
    A[Manufacturer's Certificate] --> B[Fineness Test]
    A --> C[Setting Time Test]
    A --> D[Soundness Test]
    A --> E[Compressive Strength Test]
    A --> F[Air Content Test]
    A --> G[Water Retention Test]
    A --> H[Sampling & Mass Tolerance]

This ensures cement meets IS 346

IS 3466: Basis of Purchase - Key Specifications & Tables

1. Physical Requirements (Clause 3.1.1, Table 1)

2. Materials

• Standard sand must conform to IS 650-1965.

3. Sampling & Testing (Clause 10.4.1)

• Purchaser may require independent tests on samples taken before or immediately after delivery.

Additional Notes:

• Mortar mix for tests: 1 part masonry cement + 3 parts standard sand by volume.
• Compressive strength tested on 50 mm cubes.
• Air content and water retention ensure workability and durability.

flowchart TD
    A[Masonry Cement] -->|1 part| M[Mortar Mix]
    B[Standard Sand] -->|3 parts| M
    M --> C[Test Specimens]
    C --> D[Physical Tests]
    D -->|Fineness, Setting Time, Soundness| E[Acceptance Criteria]
    D -->|Compressive Strength, Air Content, Water Retention| E

This summary ensures compliance with IS 3466 "Basis of Purchase" requirements for masonry cement.

IS 3466: Packing and Marking - Key Specifications

1. Marking (Clause 8.1.2)

• Bags/packages may bear the Standard Mark indicating compliance with BIS quality control.
• Use of Standard Mark is governed by the BIS Act 1986.
• Standard Mark assures:
  • Production as per IS standards.
  • Continuous BIS inspection and testing.
• Delivery advices must accompany shipments with similar info (Clause 8.1.1).

2. Tolerance for Mass of Cement in Bags (Clause 8.2 & Appendix A)

• Average net mass per bag must be ≥ 50 kg.
• Bags selected randomly (per IS 4905-1968).
• For wagon/truck load (20-25 tonnes), tolerance on net mass is 0 to +0.5%.

Summary Table for Sampling & Tolerances

flowchart TD
    A[Packed Cement Bags] --> B{Batch Size}
    B -->|100-150| C[Sample 20 Bags]
    B -->|151-280| D[Sample 32 Bags]
    B -->|281-500| E[Sample 50 Bags]
    B -->|501-1200| F[Sample 80 Bags]
    B -->|1201-3200| G[Sample 125 Bags

IS 3466 Sampling Key Points

• Sampling method: As per IS 3535-1986, sampling procedures must ensure representativeness and randomness.

• Sample size (Clause 8.2, Appendix A):

  Batch Size (bags)	Sample Size (bags)
  100 to 150	20
  151 to 280	32
  281 to 500	50
  501 to 1,200	80
  1,201 to 3,200	125
  3,201 and over	200

• Mass requirement: Average net mass of cement per bag in the sample ≥ 50 kg.

• Random selection: Bags must be selected randomly per IS 4905-1968.

• Facilities and labor: Manufacturer/supplier must provide all facilities, labor, and materials for sampling and identification (Clause 9.3).

• Testing timeline: Tests on the sample should be done as expeditiously as possible after sampling (Clause 10.4.2).

flowchart TD
    A[Batch of Cement Bags] --> B[Random Sampling as per IS 4905]
    B --> C[Sample Size per Batch Size Table]
    C --> D[Average Mass ≥ 50 kg per bag]
    D --> E[Testing of Sample (IS 3535)]
    E --> F[Results & Identification]

This ensures quality control and compliance in cement packaging and testing.

IS 3466 - Testing Procedures: Key Formulas, Tables, and Specifications

1. Independent Testing (Clause 10.4)

• Testing should be conducted by an independent agency to verify compliance with IS 3466 requirements.

2. Physical Requirements (Clause 3.1.1, Table 1)

Standard sand shall conform to IS 650:1965.

3. Sampling Procedure (Clause 9.2)

• Sampling per IS 3535:1986.
• Random selection of bags per batch size as below:

Refer IS 4905:1968 for random selection.

Summary Diagram: Testing Workflow

flowchart TD
    A[Sampling of Cement Bags] --> B[Physical Tests]
    B --> C[Fineness Test]
    B --> D[Setting Time Test]
    B --> E[Soundness Test]
    B --> F[Compressive Strength Test]
    B --> G[Air Content Test]
    B

IS 3466: Tolerance Requirements for Mass of Cement Packed in Bags

Key Specifications (Appendix A, Clauses 0.4 and 8.2):

• Average net mass per bag:

  • Standard: ≥ 50 kg
  • Alternate: 25 kg (subject to agreed tolerances)

• Tolerance on net mass for wagon/truck load (20 to 25 tonnes):

  • 0 to +0.5%

Sample Size for Testing (based on batch size):

• Bags must be selected randomly (see IS 4905-1968).

Rounding Off Results:

• Follow IS 2-1960 rules for rounding numerical values.
• Retain the same number of significant digits as specified values.

Summary Formula for Tolerance Check:

[ \text{Tolerance range} = \text{Nominal mass} \times (1 + \text{Tolerance %}) ]

Example: For 50 kg bag with +0.5% tolerance, max mass = 50 × 1.005 = 50.25 kg

flowchart TD
    A[Batch Size] --> B{Select Sample Size}
    B -->|100-150| C[20 Bags]
    B -->|151-280| D[32 Bags]
    B -->|281-500| E[50 Bags]
    B -->|501-1200| F[80 Bags]
    B -->|1201-3200| G[125 Bags]
    B -->|>3200| H[200 Bags]
    C & D & E & F & G & H --> I[Random Sampling per IS 4905]
    I --> J[Check Average Mass ≥ 50 kg]
    J --> K[Check Tolerance: 0 to +0.5%]

Note: