Portland pozzolana cement Part 1 (Flyash based) – Specification

IS 1489 Part 1: Scope & Key Specifications

• Scope: Covers manufacture, physical & chemical requirements of Portland-Pozzolana Cement (Fly Ash based).
• Fly Ash Pozzolana: Only fly ash as pozzolanic material is permitted.
• Compliances: Uses definitions from IS 4845:1968.
• Standard Consistency Water (P): Percentage of water for paste consistency (Clause 12.3).
• Standard Sand: Must conform to IS 650:1966 for testing.

Key Tolerances for Cement Bag Mass (Annex B, Clause 10.2)

• Average net mass per bag ≥ 50 kg.
• Bags selected randomly (see IS 4905:1968).

Important Amendments:

• Minimum compressive strength changed from 4.0 MPa to 4.5 MPa (Clauses 4.1.2 & 4.1.3).

Rounding Off:

• Follow IS 2:1960 rules for rounding test results, retaining significant digits as per specified values.

flowchart TD
    A[Fly Ash Based PPC] --> B[Manufacture & Testing]
    B --> C[Physical & Chemical Requirements]
    B --> D[Bag Mass Tolerances]
    D --> E[Sample Size as per Batch]
    C --> F[Standard Consistency Water (P)]
    C --> G[Standard Sand IS 650:1966]

For detailed chemical & physical requirements, refer to full IS 1489 Part 1 text and related IS standards.

IS 1489 (Part 1): Definitions & Key Specifications

• Scope: Covers Portland-Pozzolana Cement (Fly Ash based) manufacture, physical & chemical requirements.
• Reference Standards: Definitions per IS 4845:1968 (Hydraulic Cement terminology).
• Standard Consistency Water (P):
  Percentage of water to produce standard consistency paste (Clause 12.3.1).
• Standard Sand:
  Must conform to IS 650:1966 for cement testing (Clause 12.3.2).
• Rounding Off:
  Follow IS 2:1960 for rounding test results, keeping significant figures consistent with specified values.
• Sampling:
  Random sampling per IS 4905:1968.
• Tolerance for Cement Bag Mass (Annex B):

• Storage & Retesting:
  Cement stored >6 months in bulk or >3 months in bags may be retested (Clause 13.2).

Summary Diagram: Cement Consistency & Sampling Process

flowchart TD
    A[Start: Cement Production] --> B{Measure Water % (P)}
    B --> C[Prepare Paste of Standard Consistency]
    C --> D[Test Physical & Chemical Properties]
    D --> E{Sampling per IS 4905}
    E --> F[Batch Size?]
    F -->|100-150| G[Sample 20 Bags]
    F -->|151-280| H[Sample 32 Bags]
    F -->|281-500| I[Sample 50 Bags]
    F -->|501-1200| J[Sample 80 Bags]
    F -->|1201-3200| K[Sample 125 Bags]
    F -->|>3200| L[Sample 200 Bags]
    G & H & I & J & K & L --> M[Check Mass Tolerance]
    M --> N{Pass?}

Portland Clinker as per IS 1489 Part 1:

• Definition (Clause 3.2):
  Clinker is mainly calcium silicates formed by heating a homogeneous mix of lime (CaO), silica (SiO₂), alumina (Al₂O₃), and iron oxide (Fe₂O₃) to incipient fusion.

• Chemical Requirements (Refer IS 269:1989 via Clause 4.2):
  Clinker must comply with IS 269 for Portland cement clinker chemical composition.

• Key Chemical Limits for Portland-Pozzolana Cement Clinker (Clause 6.1, Table 1):

• Notes:
  • Loss on ignition indicates unburnt carbonates or moisture.
  • MgO content affects soundness; high MgO (>6%) may cause expansion.
  • Insoluble material relates to impurities affecting cement quality.

Summary Formula for Insoluble Material Limit:

[ \text{Max Insoluble Material} = x + \frac{4.0(100 - x)}{100} ]

where x = percentage of some constituent (context-specific).

This ensures clinker quality for durable, sound Portland-pozzolana cement production.

IS 1489 Part 1: Constituent Materials Key Formulas & Specifications

1. Insoluble Material Limit (Clause 4.0.iv)

For Portland-pozzolana cement with fly ash content x%: [ \text{Insoluble Material (max %)} = x + \frac{4.0 (100 - x)}{100} ]

• x = declared fly ash percentage by mass
• Ensures insoluble material stays within limits based on fly ash content.

2. Chemical Requirements (Clause 6.1, Table 1)

3. Physical Requirements (Clause 12.3)

• P = % water for standard consistency paste.
• Standard sand for testing conforms to IS 650:1966.

Notes:

• Rounding off test results follows IS 2:1960 rules.
• Fly ash is the only pozzolana used.
• Chemical and physical tests ensure cement quality and performance.

flowchart LR
    A[Fly Ash % (x)] --> B[Calculate Insoluble Material Max]
    B --> C[Perform Chemical Tests]
    C --> D{Pass Limits?}
    D -- Yes --> E[Use Cement]
    D -- No --> F[Reject Batch]

This summary aids in quality control of Portland-pozzolana cement per IS 1489 Part 1.

IS 1489 (Part 1) - Composition Requirements for Portland-Pozzolana Cement (Fly Ash Based)

Chemical Requirements (Clause 6.1, Table 1)

• Loss on Ignition: Measures unburnt carbon and moisture.
• Magnesia: Excess MgO can cause expansion.
• Insoluble Material: Depends on fly ash content (x); controls cement fineness and quality.

Physical Requirements (Clause 7 & 12.3)

• Standard Consistency Water (P%): Percentage of water to produce standard paste consistency.
• Standard Sand: Must conform to IS 650:1966 for testing.

Notes:

• Rounding of test results must follow IS 2:1960.
• Fly ash percentage (x) is declared by the manufacturer and used in insoluble material formula.

Formula for Insoluble Material Limit:

[ \text{Max Insoluble Material} = x + \frac{4.0(100 - x)}{100} ]

Where:

• (x) = % fly ash in cement

This ensures cement quality control by balancing chemical constituents per IS 1489 (Part 1).

IS 1489 (Part 1) Chemical Requirements for Portland-Pozzolana Cement

• x = declared percentage of fly ash in the cement.
• Insoluble material limit adjusts based on fly ash content.

Notes:

• Chemical tests follow IS 4032:1985.
• Values are rounded per IS 2:1960 rules.
• Cement failing these limits may be rejected (Clause 13.2).
• Fly ash must conform to IS 3812.

Formula for Insoluble Material Limit:

[ \text{Max Insoluble Material} = x + \frac{4.0 \times (100 - x)}{100} ]

where x = % fly ash in cement.

References:

• IS 4032:1985 — Chemical analysis methods.
• IS 3812 — Fly ash specification.
• IS 2:1960 — Rounding rules.

flowchart TD
    A[Declared Fly Ash % (x)] --> B[Calculate Insoluble Material Limit]
    B --> C[Max Insoluble Material = x + 4.0*(100-x)/100]
    C --> D[Check against test results]
    D -->|Pass| E[Accept Cement]
    D -->|Fail| F[Reject Cement]

This ensures chemical compliance of Portland-pozzolana cement as per IS 1489 (Part 1).

IS 1489 Part 1: Physical Requirements Summary

Key Formulas & Specifications

• Insoluble Material % (Max):
  [ \text{Max Insoluble material} = x + \frac{4.0 (100 - x)}{100} ]
  where x = declared % of fly ash in Portland-pozzolana cement.

• Standard Testing Conditions:

  • Temperature: 27 ± 2°C (Clause 12.2)
  • Record actual temperature during tests.

• Water for Standard Consistency (P):

  • P = % water to produce standard paste consistency (Clause 12.3).

• Standard Sand:

  • Must conform to IS 650:1966 (Clause 12.3).

Chemical Requirements (Table 1)

Notes:

• These physical and chemical limits ensure cement quality and durability.
• Always verify test temperature and water content for consistency.

flowchart TD
    A[Portland-Pozzolana Cement] --> B[Physical Tests at 27±2°C]
    B --> C[Measure Water % for Standard Consistency (P)]
    B --> D[Use Standard Sand IS 650:1966]
    A --> E[Chemical Tests]
    E --> F[Loss on Ignition ≤ 5%]
    E --> G[MgO ≤ 6%]
    E --> H[Insoluble Material ≤ x + 4(100-x)/100]

IS 1489 Part 1 – Manufacture Key Points

• Water for Standard Consistency (Clause 12.3):
  Percentage of water (P) required to produce a paste of standard consistency is determined per IS 4031 (Part 4). This water content is critical for cement testing.

• Standard Sand (Clause 12.3):
  Must conform to IS 650:1966 for physical and grading properties, used in cement testing.

• Packing Tolerances (Annex B, Clause 10.2):
  Sampling size depends on batch size for quality control of cement bag weights:

• Packing Material (Clause 10.2.2.3):
  Must be agreed upon between manufacturer and purchaser.

Summary Diagram of Manufacture Process Considerations

flowchart TD
    A[Raw Materials] --> B[Mixing & Grinding]
    B --> C[Water Addition (P% for standard consistency)]
    C --> D[Quality Testing with Standard Sand (IS 650)]
    D --> E[Packing in Bags]
    E --> F[Sampling & Tolerance Check (Annex B)]
    F --> G[Dispatch]

References:

• IS 4031 (Part 4) for water consistency test
• IS 650:1966 for standard sand
• IS 4905:1968 for random sampling of bags

This ensures cement quality and compliance with IS 1489 (Part 1).

Manufacturer's Certificate Requirements (IS 1489 Part 1)

• Fly Ash Content Declaration (Clause 9.1):

  • Manufacturer must certify the percentage of fly ash in the cement within 10 days of dispatch.
  • Fly ash content variation must be within ±3% of declared value.

• Drying Shrinkage Limit (Clause 7.5):

  • Average drying shrinkage of mortar bars tested per IS 4031 (Part 10):1988 must not exceed 0.15%.

• Storage:

  • Cement must be stored in weather-proof buildings to prevent dampness and deterioration.

Tolerance for Mass of Cement Packed in Bags (Annex B, Clause 10.2)

• Sample bags are selected randomly as per IS 4905:1968.
• Average net mass per bag in sample must be ≥ 50 kg.

Strength Requirements (Clause 4.5)

• Substituted compressive strength values:
  • 4.5 MPa (instead of 4.0 MPa) for relevant strength checks.

flowchart TD
    A[Manufacturer] --> B[Check Cement Quality]
    B --> C[Confirm Fly Ash %]
    C --> D[Issue Certificate (±3% fly ash)]
    B --> E[Pack Cement Bags]
    E --> F[Random Sampling per IS 4905]
    F --> G[Check Bag Mass ≥ 50 kg]
    G --> H[Dispatch Cement]

This ensures traceability and quality compliance as per IS 1489 Part 1.

IS 1489 Part 1: Packing and Marking Key Points

• Packing Material: As per Clause 10.2.2.3, the packing material must be mutually agreed upon by the manufacturer (or supplier) and purchaser.

• Packing Type: For export cement (Clause 10.2.2), packing may be:

  • In bags, or
  • In drums,

  with the average net mass per bag or drum agreed between purchaser and manufacturer.

• Typical Bag Mass: Common practice (not explicitly in IS 1489) is 50 kg per bag, but this can vary as per agreement.

• Marking on Bags/Drums: Usually includes:

  • Manufacturer's name
  • Cement type and grade
  • Net mass
  • Batch number
  • ISI mark (if applicable)

No specific tables or formulas are provided in IS 1489 Part 1 for packing; it relies on agreement between parties.

flowchart LR
    A[Manufacturer] -->|Agree on packing material & mass| B[Packing (Bags/Drums)]
    B --> C[Marking: Manufacturer, Grade, Net Mass, Batch No.]
    C --> D[Dispatch to Purchaser]

Summary: Packing and marking are flexible per purchaser-manufacturer agreement, with typical net mass per bag/drum standardized by mutual consent.

IS 1489 Part 1: Sampling Key Points

Sampling Procedure (Clause 11.2)

• Sampling must follow IS 3535:1986 methods.
• Samples are taken randomly as per IS 4905:1968.
• Manufacturer must provide facilities and labor for sampling and identification (Clause 11.3).

Sample Size for Cement Bags (Annex B, Clause 10.2)

• Average net mass per bag in sample must be ≥ 50 kg.

Additional Notes (Clause 12.4.1)

• Independent testing samples can be taken before or immediately after delivery.
• Testing follows IS 1489 Part 1 standards on purchaser's written instructions.

Summary Diagram of Sampling Process

flowchart TD
    A[Start: Cement Batch] --> 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]
    B -->|>3200| H[Sample 200 Bags]
    C --> I[Random Sampling per IS 4905]
    D --> I
    E --> I
    F --> I
    G --> I
    H --> I
    I --> J[Check Avg Mass ≥ 50 kg]
    J --> K[Testing per IS 1489 & IS 3535]

This ensures compliance with IS 1489 Part 1 sampling requirements.

IS 1489 Part 1 – Testing Key Points

1. Testing Temperature (Clause 12.2)

• Physical tests should be conducted at 27 ± 2°C.
• Actual test temperature must be recorded for reference.

2. Independent Testing (Clause 12.4)

• Testing should be performed independently to ensure unbiased results.

3. Sample Size for Mass Tolerance (Annex B, Clause 10.2)

• Sample sizes depend on batch size for cement bags (each bag nominally 50 kg):

• Bags must be randomly selected (refer IS 4905:1968).

4. Water Content (Clause 12.3)

• P = % water for standard consistency paste.
• Standard sand as per IS 650:1966.

Summary Formula for Water Content:

• Water % (P) is determined to achieve standard consistency in cement paste.

flowchart TD
    A[Start Testing] --> B{Temperature 27 ± 2°C?}
    B -- Yes --> C[Record Actual Temperature]
    B -- No --> D[Adjust Lab Conditions]
    C --> E[Select Sample Size Based on Batch]
    E --> F[Random Selection per IS 4905]
    F --> G[Conduct Physical Tests]
    G --> H[Determine Water % for Standard Consistency]
    H --> I[Report & Verify Results]

Note: Always refer to IS 1489 Part 1 for detailed procedures and IS 4905 for sampling methodology.

IS 1489 Part 1 — Rejection Criteria Summary

Key Clauses on Rejection (Clause 13)

• Clause 13.1: Cement consignment may be rejected if it fails any specification requirement.
• Clause 13.2:
  • Cement in bulk storage > 6 months or in vendor bags > 3 months after testing may be retested.
  • If retest fails, cement shall be rejected.

Related Specifications & Sampling

Sampling Table (Annex B - Clause 10.2)

Summary

• Cement older than specified storage durations must be retested.
• Failure in retesting or any specification leads to rejection.
• Sampling size depends on batch size for quality control.
• Refer to IS 4031 for physical test methods and IS 4905 for sampling.

flowchart TD
    A[Cement Storage] --> B{Storage Duration}
    B -->|Bulk > 6 months| C[Retest Cement]
    B -->|Bags > 3 months| C
    C --> D{Pass Retest?}
    D -->|Yes| E[Use Cement]
    D -->|No| F[Reject Cement]
    A --> G{Initial Test}
    G -->|Fail| F
    G -->|Pass| E

References:

• IS 1489 Part 1:1991 Clauses 10.2, 12.4, 13.1

IS 1489 (Part 1): 1991 - List of Referenced Indian Standards (Annex A)

This standard references essential IS codes related to Portland Pozzolana Cement (Fly Ash based). Key referenced standards include:

Important Notes:

• These referenced standards cover material specifications, testing methods, sampling, and packaging for cement and related materials.
• Compliance with these standards ensures uniform quality and performance of Portland Pozzolana Cement.
• For rounding off test values, IS 2:1960 rules apply.
• Cement storage and retesting criteria are specified in Clause 13.2.

Summary Diagram: Referenced IS Codes Relation to IS 1489 (Part 1)

graph LR
A[IS 1489 (Part 1)] --> B[Material Specs]
A --> C[Testing Methods]
A --> D[Sampling & Packaging]
B --> IS269[IS 269: Ordinary Portland Cement]
B --> IS3812[IS 3812: Fly Ash]
C --> IS4031[IS 4031: Physical Tests]
C --> IS403

Tolerance Requirements for Mass of Cement Packed in Bags (IS 1489 Part 1)

Key Points from Clauses:

• Average net mass per bag: Should be ≥ 50 kg (Clause 10.2.2.4, Annex B).
• Tolerance limits: As per Standards of Weights and Measures (Packaged Commodities) Rules, 1977 and IS 1489 Annex B.
• Sample size for testing depends on batch size (Annex B):

• Bags are randomly selected for sampling (see IS 4905:1968).

Summary:

• The average net mass of cement bags in a sample must not be less than the declared mass (usually 50 kg).
• Tolerances on individual bags must comply with the Packaged Commodities Rules.
• Sampling size varies with batch size to ensure statistical reliability.

Reference Formula:

If ( M ) = declared mass per bag (e.g., 50 kg), then:

[ \text{Average mass of sampled bags} \geq M ]

Sampling Process Diagram:

flowchart TD
    A[Start: Batch of 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]
    B -->|>3200| H[Sample 200 Bags]
    C --> I[Random Selection per IS 4905]
    D --> I
    E --> I
    F --> I
    G --> I
    H --> I
    I --> J[Check Average Mass ≥