Code of practice for preparation and use of lime-pozzolana mixture concrete in buildings and roads

IS 5817: Scope & Key Specifications for Lime-Pozzolana Concrete (Clause 6.1)

Scope:
IS 5817 covers the use of lime-pozzolana mixture concrete in various structural and non-structural applications such as leveling courses, road bases, roof finishes, bonded underlays, and solid building/paving blocks.

Key Table: Recommended Mix Proportions (Excerpt from Table 1, Clause 6.1)

Notes:

• Aggregate grading: Should conform to IS 383:1970.
• Water content: Maintain compaction factor of 0.85 ± 0.02.
• Volume basis: 36 kg bag of LP mixture ≈ 0.0425 m³.
• Applications: Includes roof finishes (Clause 8.4.2), solid blocks (Clause 8.7).

References for Mix Design & Blocks:

• IS 4098:1983 (Lime-Pozzolana mixture)
• IS 10772:1983 (Quick setting lime-pozzolana)
• IS 3115:1978, IS 10049:1981, IS 10359:1982 (Blocks manufacture)

flowchart TD
    A[Lime-Pozzolana Concrete] --> B[Levelling Course]
    A --> C[Road Bases]
    A --> D[Bonded Underlays]
    A --> E[Roof Finish]
    A --> F[Building & Paving Blocks

IS 5817 References & Key Specifications for Lime-Pozzolana Mixture Concrete

Key Reference Standards:

Recommended Mix Proportions (Table 1, Clause 6.1):

Notes:

• Aggregate grading should conform to IS 383:1970.
• Volumetric proportion assumes 1 bag (36 kg) LP mixture = 0.0425 m³.
• Compaction factor for water requirement: 0.85 ± 0.02.
• Use appropriate mix based on application (roof finish, road base, etc.).

Summary Diagram of Mix Design Flow:

flowchart TD
    A[Select Application] --> B{Choose Grade of Lime-Pozzolana}
    B -->|Levelling Course| C[LP-20]
    B -->|Road Base| D

IS 5817 - Definitions and Key Specifications Summary

• Lime-Pozzolana Mixture Grades: LP-7, LP-20, LP-40, Type 1, Type 2, Type 3 (per IS 4098:1983, IS 10772:1983)
• Mix Proportions: Given by mass and volume ratios of Lime-Pozzolana mixture, fine aggregate, and coarse aggregate (crushed stone or brick aggregate).

Table Extract: Recommended Mix Proportions & Strength (28 days)

Notes:

• Aggregate grading should generally conform to IS 383:1970.
• Volumetric proportioning assumes 1 bag (36 kg) LP mixture = 0.0425 m³.
• Compaction factor for water requirement: 0.85 ± 0.02.
• Use lime-pozzolana concrete for solid building and paving blocks (see IS 3115:1978, IS 10049:1981, IS 10359:1982).

Key Definitions (from IS 5817 context):

• Lime-Pozzolana Mixture: A blend of lime and pozzolanic material conforming to IS 4098 and IS 10772.
• Coarse Aggregate: Crushed stone or brick aggregate as per IS 383.
• Mix by Mass/Volume: Proportions of ingredients by weight or volume for concrete mix design.
• Compressive and Flexural Strength: Minimum strengths expected after 28 days curing.

flowchart TD
    A[Lime-Pozzolana Mixture] -->

IS 5817 - Materials for Lime-Pozzolana Mixture Concrete

Key Mix Proportions (Table 1, Clause 6.1)

Notes:

• Aggregates grading should conform to IS 383:1970.
• Water content adjusted for compaction factor 0.85 ± 0.02.
• Volumetric proportion assumes 36 kg bag of LP mixture ≈ 0.0425 m³.
• Fine and coarse aggregates include crushed stone or brick aggregates.

References for Materials:

• Lime-Pozzolana mixture: IS 4098:1983, IS 10772:1983
• Aggregates: IS 383:1970, IS 3068:1986 (brick aggregate)
• Water: IS 456:2000 (clause 5.4)
• Blocks & paving: IS 3115:1978, IS 10049:1981, IS 10359:1982

Application:

• Use suitable mix from Table 1 based on structural requirement (e.g., roof finish per Clause 8.4.2).
• For blocks and paving,

IS 5817: Design Considerations for Lime-Pozzolana Concrete

Key Specifications (Clause 6.1 & Table 1)

Important Notes:

• Aggregate grading should conform to IS 383:1970.
• Volumetric proportioning assumes 1 bag (36 kg) LP mixture = 0.0425 m³.
• Water compaction factor: 0.85 ± 0.02.
• Bed of ground must be wetted and rammed before concreting (Clause 8.2.1).
• Roof finish concrete mix per Table 1, Serial No.1 (Clause 8.4.2).
• Design of water-tight finishes follows IS 3067:1988 (Clause 8.4.3.1).

Summary of Design Considerations:

• Choose mix grade based on application (foundation, road base, paving).
• Use recommended mix ratios by mass or volume for durability and strength.
• Ensure proper site preparation (wetting, ramming).
• Follow related IS codes for specific finishes and waterproofing.

flowchart TD
    A[Site Preparation] --> B[Mix Selection]
    B --> C{Application}
    C -->|Foundation| D[LP-20 Mix]
    C -->|Road Base| E[LP-40 Mix]
    C -->|Paving| F[LP-40 Mix]
    D --> G[Proper Compaction]
    E

IS 5817 - Strength Characteristics of Lime-Pozzolana Concrete

Key Specifications (Clause 5.6 & Table 1)

• Strength depends on:

  • Type of lime-pozzolana mixture (IS 4098:1983 / IS 10772:1983)
  • Water/binder ratio
  • Binder/aggregate ratio

• Minimum 28-day strength requirements:

• Volumetric mix proportions are also provided, e.g., for LP-20: 1 : 2.25 : 4.5 (Lime-Pozzolana : Fine Agg. : Coarse Agg.)

Additional Notes

• Aggregate grading should conform to IS 383:1970.
• Compaction factor for water requirement: 0.85 ± 0.02.
• Lime-pozzolana concrete is durable and sulphate-resistant, suitable for foundations with high sub-soil water and sulphate content.

Summary Formula for Compressive Strength (Approximate):

[ f_c \propto \frac{\text{Binder content}}{\text{Aggregate content}} \times \frac{1}{\text{Water/Binder ratio}} ]

flowchart LR
    A[Select Lime-Pozzolana Grade] --> B[Determine Mix Ratios]
    B --> C{Situation}
    C -->|Foundation Levelling| D[Use LP-20 Mix]
    C -->|Road Base| E[Use LP-40 Mix]
    C -->

IS 5817 - Mixing Methods for Lime-Pozzolana Concrete

1. Hand Mixing (Clause 7.2.2)

• Use a clean, water-tight platform with tight joints to prevent leakage.
• The platform size must be sufficient for sample mixing.
• Mixing tools should not strike joints during operation.

2. Machine Mixing (Clause 7.2.3)

• Sequence of adding materials:
  1. Add saturated surface dry (SSD) coarse aggregate.
  2. Add sand and lime-pozzolana mixture.
  3. Add part of the mixing water and mix.
  4. Add remaining water and mix thoroughly.
• Mixing duration: Minimum 2 minutes to ensure uniformity.

3. Application (Clause 7.2.1)

• Hand mixing for small quantities or hand-operated mixers.
• Mechanical mixers recommended for large-scale work.

Summary Table:

flowchart TD
    A[Start] --> B[Add SSD Coarse Aggregate]
    B --> C[Add Sand + Lime-Pozzolana]
    C --> D[Add Part Water & Mix]
    D --> E[Add Remaining Water & Mix ≥ 2 min]
    E --> F[Uniform Mix Ready]

IS 5817: Preparation and Use of Lime-Pozzolana Mixture Concrete

Key Points from the Code

• Mix Proportions (Clause 5.3 & Table 1):
  Table 1 provides recommended mix proportions for lime-pozzolana concrete depending on the application (foundations, road bases, floors, etc.).

  • For foundations: Use only if strength requirements are moderate (Clause 5.2.1).
  • For road bases and improved floor bases: Use mix proportions as per Serial No. 2, Table 1 (Clause 8.5.1).

• Factors to Consider (Clause 5.2):

  • Soil nature and ground characteristics
  • Sub-soil water level
  • Load transmitted to foundation

Typical Mix Proportions (from IS 5817 Table 1)

Notes:

• Lime is usually hydrated lime.
• Pozzolana can be fly ash, volcanic ash, or other siliceous materials.
• Aggregate size and grading should conform to IS standards for concrete.

Summary Diagram of Preparation Process

flowchart TD
    A[Select Application] --> B{Check Strength Requirement}
    B -- Low to Moderate --> C[Choose Mix Proportion from Table 1]
    B -- High --> D[Use Alternative Concrete]
    C --> E[Prepare Lime-Pozzolana Mix]
    E --> F[Add Aggregates]
    F --> G[Mix Thoroughly]
    G --> H[Place & Cure Concrete]

In brief: Use IS 5817 Table 1 for mix ratios; consider soil and load conditions; ensure proper curing for durability.

IS 5817: Lime-Pozzolana Mixture Concrete (LPMC) Key Points

1. Application (Clauses 5.2.1 & 8.2)

• Used only in foundations and under floors where strength requirements are moderate.
• Not suitable for high strength structural elements.
• Refer Table 1 for permissible strength limits for different work situations.

2. Mix Proportions (Clause 8.5.1)

• Use mix proportions from Serial No. 2, Table I for road bases and improved base concrete under floors.
• Typical lime-pozzolana mix ratio example (by volume):
  • Lime : Pozzolana : Sand : Aggregate = 1 : 2 : 6 : 12 (varies per specific table)
• Water added to achieve workable consistency.

3. Strength & Specifications

• Strength is generally lower than ordinary Portland cement concrete.
• Suitable for non-load bearing foundations, road bases, and flooring bases.
• Pozzolana improves durability and reduces permeability.

Sample Table Extract (Typical Mix Ratios)

Summary Diagram

flowchart TD
    A[Lime + Pozzolana] --> B[Mix with Sand & Aggregate]
    B --> C[Form Lime-Pozzolana Concrete]
    C --> D[Use in Foundations & Under Floors]
    D --> E{Strength Requirements}
    E -->|Low to Moderate| F[Suitable]
    E -->|High| G[Not Suitable - Use OPC Concrete]

Note: Always verify mix proportions and strength limits as per IS 5817 Table 1 and Table I for your specific project.

IS 5817 - Lime-Pozzolana Concrete in Haunches of Arches (Clause 8.3)

Key Points:

• Lime-pozzolana concrete is recommended for haunches of arches due to its good workability and durability.
• The mix proportions should ensure adequate strength without exceeding limits given for foundations (Clause 5.2.1 & Table 1).
• Use mix proportions similar to those in Table 1, Serial No. 2 for foundations and under floors (Clause 8.5.1).

Typical Mix Proportions (from Table 1, Serial No. 2):

Specifications:

• Strength: Should comply with limits in Table 1 (generally low to moderate compressive strength).
• Curing: Proper moist curing for at least 7 days is essential.
• Application: Suitable for non-structural zones like haunches where moderate strength and durability are required.

Summary Diagram:

flowchart LR
    A[Lime] --> Mix[Lime-Pozzolana Concrete Mix]
    B[Pozzolana] --> Mix
    C[Sand] --> Mix
    Mix --> D[Haunches of Arches]
    D --> E[Moderate Strength & Durability]

Note: For detailed strength values and limits, refer to Table 1 of IS 5817. Use lime-pozzolana concrete only where strength requirements are moderate, as per the code.

IS 5817 - Roof Finish Applications: Key Points

1. Concrete Mix for Roof Finish (Clause 8.4.2)

• Use concrete with suitable mix proportions as per Serial No. 1, Table 1 of IS 5817.
• Typically, this refers to lime-pozzolana concrete for durability and water resistance.

2. Design & Preparation (Clause 8.4.3.1)

• Follow IS 3067:1988 for:
  • Basic information on waterproof finishes.
  • Design considerations.
  • Surface preparation before applying roof finish.

3. Slope Requirements for Drainage (Clause 8.4.6.2)

• To prevent water penetration, ensure:
  • Slope ≥ 1:60 (1 in 60) for terrace with lime-pozzolana concrete & tile finish.
  • Slope ≥ 1:50 (1 in 50) for plain lime-pozzolana concrete finish.

Summary Table: Minimum Roof Slope for Drainage

Additional Notes:

• Proper slope ensures efficient surface water drainage and enhances waterproofing.
• Use lime-pozzolana concrete for its pozzolanic reaction, improving durability and water resistance.

flowchart LR
    A[Roof Surface] --> B[Preparation as per IS 3067]
    B --> C[Apply Lime-Pozzolana Concrete Mix]
    C --> D{Finish Type}
    D -->|Tiles + Concrete| E[Slope ≥ 1:60]
    D -->|Plain Concrete| F[Slope ≥ 1:50]
    E & F --> G[Efficient Drainage & Water-tight Finish]

This ensures a durable, water-resistant roof finish per IS 5817.

IS 5817: Key Points on Curing and Compaction

Compaction (Clauses 8.5.3, 8.3.1, 8.2.1)

• Concrete layers ≤ 100 mm thick.
• Compact using:
  • Needle or screed vibrator, or
  • 8-10 tonne roller (depending on site conditions).
• Continue compaction until wet mortar appears on the surface.
• Ground bed must be wetted and rammed before concreting.

Curing (Clause 8.2.6.1)

• Initial curing: Cover with wet hessian for 48 hours.
• Further curing: Spread wet sand or gunny bags and water frequently for at least 10 days.
• Ensures proper hydration and durability.

Mix Proportions (Table 1, Serial No. 1)

• Refer to Table 1 for recommended concrete mix proportions suitable for lime-pozzolana concrete.

Summary Table for Compaction & Curing

flowchart TD
    A[Prepare Ground Bed] --> B[Wetting & Ramming]
    B --> C[Lay Concrete in ≤100 mm Layers]
    C --> D[Compact (Vibrator/Roller)]
    D --> E[Wet Mortar Appears on Surface]
    E --> F[Cover with Wet Hessian (48h)]
    F --> G[Spread Wet Sand/Gunny Bags + Water (≥10 days)]
    G --> H[Properly Cured Concrete]

This ensures durable, defect-free lime-pozzolana concrete as per IS 5817.

IS 5817 - Lime-Pozzolana Mixture Concrete in Bonded Underlays

Key Specifications (Clause 8.6)

• Use: For composite rigid pavements as a bonded underlay beneath thin cement concrete overlays.
• Mix Proportions: Refer to Serial No. 3, Table 1 for guidance on mix proportions specific to bonded underlays.

Typical Mix Proportions from IS 5817 (Table 1 Extract)

Note: Percentages are by weight of total binder (lime + pozzolana).

Important Points:

• Binder Composition: Lime + Pozzolana (e.g., fly ash, calcined clay).
• Water-Cement Ratio: Maintain low water content (10-12%) for strength and bonding.
• Application: Ensures good adhesion and durability under thin overlays.

Summary Diagram: Lime-Pozzolana Concrete Layering

graph TD
    A[Subgrade] --> B[Lime-Pozzolana Mixture Concrete Underlay]
    B --> C[Thin Cement Concrete Overlay]

This layered system improves bonding and load distribution in composite pavements.

For detailed mix design, always refer to Table 1 of IS 5817 and adjust based on local materials and conditions.

IS 5817: Key Specifications for Making Solid Building and Paving Blocks Using Lime-Pozzolana Mixture Concrete

1. Mix Proportions (from Table 1, Clause 6.1)

• Coarse aggregate grading should conform to IS 383:1970.
• Volumetric mix assumes 36 kg bag LP mixture ≈ 0.0425 m³.
• Compaction factor: 0.85 ± 0.02.
• Water quality as per IS 456:2000 (Clause 5.4).

2. Manufacturing & Compaction (Clause 8.3.1)

• Blocks are made by laying concrete in layers ≤ 100 mm thick.
• Compact/ram until wet mortar appears on the surface.
• Use lime-pozzolana mixture conforming to IS 4098:1983 and IS 10772:1983.

3. References for Mix Design & Materials

• IS 3115:1978, IS 10049:1981, IS 10359:1982 for mix guidance.
• IS 4098:1983, IS 10772:1983 for lime-pozzolana specifications.
• IS 383:1970 for aggregates.

flowchart TD
    A[Lime-Pozzolana Mixture] --> B[Mixing with Fine & Coarse Aggregates]
    B --> C[Layered Laying (≤ 100 mm)]

IS 5817: List of Referenced Indian Standards (Key Extract)

Notes:

• These standards cover materials, mix proportions, manufacturing, and application of lime-pozzolana concrete and blocks.
• For mix proportions, refer to Table 1 in IS 3115:1978.
• Use these standards collectively to ensure compliance with quality, durability, and performance requirements.

Quick Reference Diagram of Standard Interrelation:

graph LR
  A[IS 5817] --> B[IS 3115: Lime-based blocks]
  A --> C[IS 10049 & 10359: Manufacture & use]
  A --> D[IS 383: Aggregates]
  A --> E[IS 4098: Lime-pozzolana mixture]
  A --> F[IS 2541: Lime-concrete preparation]
  A --> G[IS 3067: Waterproofing]

This structure helps in selecting relevant standards for lime-pozzolana concrete blocks and paving applications.