Tentative Specification for 20mm Thick Premix Carpet Using Cationic Bitumen Emulsion

IRC 97: Introduction - Key Points & References

• Purpose: IRC 97 provides guidelines for design and construction of concrete road bridges.
• Material Quantities: Refer Clause 4 for estimating materials needed.
• Reference Standard: IS 2386 (Part V) is cited for testing aggregates, crucial for concrete quality.
• Committee: The code is prepared by a committee of experts ensuring comprehensive coverage.

Important Specification References:

Material Quantities Estimation (Typical):

• Cement, sand, aggregates calculated based on mix design.
• Use IS 2386 for aggregate properties (specific gravity, crushing value).

Basic Formula for Concrete Quantity:

[ \text{Volume of concrete} = \text{Length} \times \text{Breadth} \times \text{Depth} ]

Material quantities (approximate for M20 concrete):

flowchart TD
    A[Design Inputs] --> B[Material Testing (IS 2386)]
    B --> C[Concrete Mix Design]
    C --> D[Quantity Estimation (Clause 4)]
    D --> E[Construction]

This overview sets the foundation for bridge design and material specification per IRC 97.

IRC 97 - Materials: Key Specifications & Tables

Coarse Aggregate Physical Properties (Table 3.2)

Notes:

• Los Angeles Abrasion and Aggregate Impact Values assess aggregate toughness.
• Flakiness Index controls particle shape for workability.
• Stripping Value evaluates bitumen-aggregate adhesion.
• Water Absorption affects durability.
• Soundness tests simulate weathering effects.

Reference Standards:

• IS 2386 (Parts I, III, IV, V) for aggregate testing.
• IS 6242 for stripping value.

flowchart LR
    A[Coarse Aggregate] --> B[Physical Tests]
    B --> C[Los Angeles Abrasion ≤ 40%]
    B --> D[Aggregate Impact ≤ 30%]
    B --> E[Flakiness Index ≤ 30%]
    B --> F[Stripping Value ≤ 25%]
    B --> G[Water Absorption ≤ 1%]
    B --> H[Soundness Tests]
    H --> I[Sodium Sulphate ≤ 12%]
    H --> J[Magnesium Sulphate ≤ 18%]

This ensures durable, strong aggregates suitable for road pavement layers.

IRC 97: Properties of Aggregates

1. Coarse Aggregate Specifications (Table 3.2)

2. Size Specifications

• Coarse aggregate size: 13.2 mm nominal size
• Passing through 19 mm sieve
• Retained on 9.5 mm sieve
• Quantity: 0.18 m³

Notes:

• Los Angeles Abrasion and Aggregate Impact Values measure aggregate toughness and resistance to fragmentation.
• Flakiness Index assesses particle shape; lower values indicate better quality.
• Water Absorption affects durability and concrete mix design.
• Soundness tests ensure resistance to weathering.

flowchart TD
    A[Coarse Aggregate] --> B[Size: 13.2 mm nominal]
    B --> C[Pass 19 mm sieve]
    B --> D[Retain 9.5 mm sieve]
    A --> E[Physical Tests]
    E --> F[Los Angeles Abrasion ≤ 40%]
    E --> G[Aggregate Impact ≤ 30%]
    E --> H[Flakiness Index ≤ 30%]
    E --> I[Water Absorption ≤ 1%]
    E --> J[Soundness Tests]
    J --> K[Sodium Sulphate ≤ 12% loss]
    J --> L[Magnesium Sulphate ≤ 18% loss]

This ensures aggregates meet durability and strength requirements for road construction as per IRC

Binder Specifications for Premix Carpet (IRC 97)

• Binder Type: Cationic bitumen emulsion, MS Grade (Medium Setting)
• Standard Compliance: IS 8887-1978
• Bitumen Content: Minimum 60% by weight in the emulsion
• Application: For 20 mm thick premix carpet and seal coat (tentative specification)

Key Points:

Notes:

• MS Grade emulsion ensures medium setting time suitable for premix carpet.
• Emulsion must be stable and conform to IS:8887 requirements.
• The binder ensures proper adhesion and durability of the premix carpet layer.

flowchart LR
    A[Bitumen Emulsion] --> B[MS Grade (Medium Setting)]
    B --> C[Bitumen Content ≥ 60%]
    C --> D[Used in 20 mm Premix Carpet]
    D --> E[Ensures Adhesion & Durability]

For detailed mix design and performance criteria, refer to IS:8887-1978 and IRC 97 guidelines.

IRC 97: Mix Design & Proportions for Premix Carpet

While IRC 97 lacks explicit mix design formulas, key specifications and aggregate properties are critical for mix quality:

Coarse Aggregate Requirements (Table 3.2)

Mix Proportioning Notes:

• Typical premix carpet thickness: 20 mm
• Bitumen Emulsion: Use cationic type as per tentative specs
• Aggregate gradation and binder content adjusted to ensure durability and skid resistance
• Quantities of materials depend on binder content (usually 4-6% by weight of aggregate)

General Mix Design Formula (for bituminous premix carpet):

[ \text{Binder content} = \frac{\text{Weight of bitumen emulsion}}{\text{Weight of aggregate}} \times 100% ]

Summary: Use aggregates satisfying above physical criteria, maintain binder content ~4-6%, and ensure proper gradation for a durable 20 mm premix carpet layer.

flowchart LR
    A[Coarse Aggregate] --> B{Physical Properties}
    B --> C[LA Abrasion ≤40%]
    B --> D[Impact Value ≤30%]
    B --> E[Flakiness ≤30%]
    B --> F[Water Absorption ≤1%]
    B --> G[Soundness Limits]
    H[Bitumen Emulsion] --> I[Cationic Type]
    J[Mix Design] --> K[Aggregate + Bitumen

Key Specifications & Formulas for Preparation of Base and Surface (IRC: 97)

1. Preparation of Base (Clause 5.1)

• Clean existing base thoroughly (wire brushes, brooms).
• Remove dust and deleterious matter.
• Surface may be dusted with sacks or washed if water is available.
• On water bound macadam, dampen surface before tack coat.

2. Binder Preparation (Clause 5.2)

• Roll cationic emulsion drums slowly (10m, 5-6 times) before opening.

3. Tack Coat Application (Clause 5.3)

• Apply tack coat within 10 minutes before premix.
• Spraying can holes: 6 mm diameter, spaced at 30 mm.
• Use compressed air sprayer for uniform coverage.
• Surface should be damp for water bound macadam.

4. Premix Preparation (Clause 5.4)

• Batch size for concrete mixer: 0.135 m³ aggregate (0.09 m³ of 13.2 mm + 0.045 m³ of 9.5 mm) covers 5 m² at 20 mm thickness.
• Emulsion quantity: 5 to 6.5 kg per aggregate size batch.
• Mix 13.2 mm aggregate + emulsion → then 9.5 mm aggregate + emulsion.
• Avoid over-mixing to prevent decoating.
• Manual mixing: 0.06 m³ aggregate per heap, preferably damp.

5. Spreading & Rolling (Clause 5.5)

• Spread premix within 10 minutes of tack coat.
• Workability lasts ~20 minutes.
• Rolling start: 30 minutes after laying, finish within 4 hours.
• Roller: 8-10 tonne smooth wheeled tandem preferred.
• Roll edges first, then center; overlap passes by 1/3 width.
• Keep roller wheels moist to avoid picking up premix.

6. Seal Coat (Clause 5.7)

• Liquid seal coat: 12-14 kg emulsion per m².
• Premix seal coat: 10-12 kg emulsion per m².
• Use clean, hard, durable aggregates free from dust.
• Mechanical spraying preferred.

Key Specifications & Formulas for Tack Coat (IRC 97):

1. Tack Coat Application Rate

• Quantity: 12-14 kg of cationic bitumen emulsion per 10 m² area (Clause 4.2.3(a))

2. Surface Preparation (Clause 5.1)

• Clean the base thoroughly using wire brushes, brooms; remove dust and deleterious matter.
• Water spray to dampen water bound macadam before tack coat application.

3. Binder Preparation (Clause 5.2)

• Roll emulsion drums slowly over 10 m, 5-6 times before opening for uniform mixing.

4. Tack Coat Application (Clause 5.3)

• Apply tack coat not earlier than 10 minutes before premix laying.
• Use spraying cans with 6 mm diameter holes spaced at 30 mm or compressed air sprayers for uniform coverage.
• Tack coat can be applied on a wet surface.

5. Premix Preparation (Clause 5.4)

• Mix aggregates and emulsion in a concrete mixer or manually.
• Typical batch: 0.135 m³ aggregate + 10-13 kg emulsion covers 5 m² at 20 mm thickness.

6. Spreading & Rolling (Clause 5.5)

• Spread premix within 10 minutes of tack coat application.
• Rolling: start after 30 minutes, finish within 4 hours using 8-10 tonne smooth wheeled roller.
• Overlap roller tracks by 1/3 width.

7. Opening to Traffic (Clause 5.8)

• Delay traffic for 6-8 hours (preferably 24 hours).
• If traffic allowed earlier, max speed 10 km/h.

Summary Table: Tack Coat & Seal Coat Quantities

flowchart TD
    A[Surface Preparation] --> B[Tack Coat Application]
    B

Premix Preparation and Mixing Methods (IRC 97)

Key Quantities (Clause 4.2)

Premix Preparation (Clause 5.4)

• Mixers: Cold mixing plant (IS:5435), concrete mixer, or manual shoveling.

• Concrete Mixer Batch:

  • Aggregate: 0.135 m³ (0.09 m³ of 13.2 mm + 0.045 m³ of 9.5 mm)
  • Covers 5 m² area at 20 mm thickness.

• Mixing Steps:

  1. Add 13.2 mm aggregate → 5-6.5 kg cationic emulsion.
  2. Add 9.5 mm aggregate → 5-6.5 kg cationic emulsion.
  3. Mix uniformly, avoid overmixing to prevent decoating.

• Manual Mixing:

  • Damp aggregates preferred.
  • Mix 13.2 mm aggregate + emulsion → then 9.5 mm aggregate + remaining emulsion.

Spreading & Rolling (Clause 5.5 & 5.6)

• Spread premix within 10 minutes of tack coat application.
• Workability lasts ~20 minutes.
• Rolling starts after 30 minutes, finished within 4 hours.
• Use 8-10 tonne smooth wheeled roller.
• Roll edges first, then center; overlap each pass by 1/3 width.
• Keep roller wheels moist to avoid pick-up.

Seal Coat (Clause 5.7)

• Apply 4-6 hours after premix laying.
• Use clean, hard aggregates free from dust and deleterious matter.
• Mechanical spraying preferred.
• Roll with 6-8 tonne roller after chip spreading.

flowchart TD
    A[Clean Base Surface] --> B[Apply Tack Coat]
    B --> C[Prepare Premix]
    C --> D[Spread Premix (within 10 min)]
    D --> E[Level & Compact (Roll)]
    E --> F[Apply Seal Coat (4

IRC 97: Seal Coat Composition & Application

Key Specifications

• Premixed Seal Coat Aggregate:

  • Coarse sand/stone grit passing 2.36 mm sieve & retained on 180 µm sieve.
  • Volume: 0.06 m³ (Clause 2.36(b)).

• Coarse Aggregate for Seal Coat:

  • Size: 9.5 mm (passing IS 13.2 mm & retained on IS 6.7 mm sieve).
  • Volume: 9.09 m³ (Clause 9.5(b)).

• Fine Aggregate for Liquid Seal Coat:

  • Crushed fine aggregate 6.7 mm size (passing IS 9.5 mm & retained on IS 2.36 mm sieve) (Clause 6.7(a)).

Quantities of Binder (per 10 m²)

Application Guidelines

• Surface Preparation: Clean thoroughly (wire brush, broom, water if available).
• Binder Preparation: Roll cationic emulsion drums slowly 5-6 times over 10 m before use.
• Tack Coat:
  • Apply on damp surface (spray water if WBM).
  • Use sprayers with 6 mm holes spaced 30 mm apart.
  • Apply tack coat not earlier than 10 minutes before premix spreading.
• Premix Preparation: Use cold mixing plant (IS 5435) or concrete mixer for uniform mixing.

flowchart TD
    A[Surface Cleaning] --> B[Tack Coat Application]
    B --> C[Premix Preparation]
    C --> D[Seal Coat Spreading]
    D --> E[Compaction & Finishing]

This ensures durable seal coat with proper bonding and aggregate distribution.

Key Construction Procedures from IRC 97 for Premix Carpet

1. Preparation

• Base Cleaning: Remove dust/debris by wire brushes, broom, and water.
• Binder Preparation: Roll cationic emulsion drums slowly (to and fro, 5-6 times over 10 m) before use.

2. Tack Coat Application

• Apply tack coat within 10 minutes before premix.
• Spray holes: 6 mm diameter, spaced 30 mm.
• Surface dampened on water bound macadam before tack coat.

3. Premix Preparation

• Mixer batch size: 0.135 m³ aggregate per batch covers 5 m² at 20 mm thickness.
• Mix 13.2 mm aggregate + 5-6.5 kg emulsion, then 9.5 mm aggregate + 5-6.5 kg emulsion.
• Avoid overmixing to prevent decoating.
• Manual mixing allowed for small works; damp aggregate preferred.

4. Spreading & Rolling

• Spread premix within 10 minutes of tack coat.
• Workability lasts ~20 minutes.
• Rolling starts ≥30 min after laying, max 4 hours delay.
• Use 8-10 tonne smooth wheeled roller; keep wheels moist.
• Roll edges first, then center; overlap passes by 1/3 width.
• Seal coat applied 4-6 hours after laying.

5. Seal Coat

• Liquid seal coat: 12-14 kg emulsion + clean crushed stone.
• Premix seal coat: 10-12 kg emulsion + coarse sand/fine grit.
• Mechanical spraying preferred.
• Rolling continues until smooth surface achieved.

6. Opening to Traffic

• Delay traffic 6-8 hours; speed ≤10 km/h if unavoidable.
• Preferably open after 24 hours.

Material Quantities Summary

Coarse Aggregate Quality (IS Tests)

Quality Control and Testing for Coarse Aggregate (IRC 97)

Key physical property requirements for coarse aggregate are:

Notes:

• Los Angeles Abrasion & Aggregate Impact test aggregate toughness and resistance to degradation.
• Flakiness Index controls shape to ensure good workability.
• Stripping Value assesses aggregate adhesion to bitumen.
• Water Absorption affects durability.
• Soundness Tests evaluate resistance to weathering.

Testing Methods:

• Follow respective IS codes for sample preparation and testing procedures.
• Maintain records for compliance and batch traceability.

flowchart TD
    A[Coarse Aggregate Sampling] --> B{Tests}
    B --> C[Los Angeles Abrasion]
    B --> D[Aggregate Impact]
    B --> E[Flakiness Index]
    B --> F[Stripping Value]
    B --> G[Water Absorption]
    B --> H[Soundness Test]
    C --> I[IS:2386 Part-IV]
    D --> I
    E --> J[IS:2386 Part-I]
    F --> K[IS:6242]
    G --> L[IS:2386 Part-III]
    H --> M[IS:2386 Part-V]

Ensure all tests meet the specified limits before using aggregates in construction.

Handling and Storage of Materials (IRC 97 & IS Codes)

Key Specifications:

• Coarse Aggregate Quality (Table 3.2):

Handling & Storage Guidelines (General Engineering Practice):

• Storage:

  • Store aggregates on a hard, clean surface to avoid contamination.
  • Cover materials to prevent moisture absorption.
  • Segregate different sizes/types to maintain grading.

• Handling:

  • Use mechanical means (conveyors, cranes) to reduce manual handling.
  • Prevent segregation and degradation during transport.
  • Inspect materials regularly for compliance with above tests.

Reference Formula for Quantity Estimation (from IS 2386):

[ \text{Quantity of aggregate} = \frac{\text{Volume of concrete} \times \text{Proportion of aggregate}}{1 + \text{Moisture content fraction}} ]

flowchart TD
    A[Material Procurement] --> B[Inspection & Testing]
    B --> C{Meets IS Specs?}
    C -- Yes --> D[Proper Storage]
    C -- No --> E[Reject or Reprocess]
    D --> F[Handling & Transport]
    F --> G[Use in Construction]

Summary: Ensure aggregates meet IS quality limits, store in dry, segregated conditions, and handle to avoid contamination or segregation for durable construction.

IRC 97: Performance & Durability Considerations for Premix Carpet

Key Specifications for Coarse Aggregate (Table 3.2)

Material Quantities & Mixing

• Aggregate per batch: 0.135 m³ (0.09 m³ of 13.2 mm + 0.045 m³ of 9.5 mm)
• Emulsion per batch: 5 to 6.5 kg per aggregate size
• Premix should be spread within 10 minutes of tack coat.
• Workability lasts about 20 minutes after mixing.

Spreading & Rolling

• Rolling starts 30 minutes after laying, must finish within 4 hours.
• Use 8-10 tonne smooth wheeled roller.
• Roll from edges to center; on curves, from inner to outer edge.
• Overlap roller passes by at least 1/3 width.
• Edges at joints must be cut full depth and painted with binder before new mix.

Seal Coat

• Apply seal coat 4-6 hours after premix laying.
• Use clean, durable aggregate free from dust and deleterious materials.
• Mechanical spraying preferred.
• Roll with 6-8 tonne roller after spreading chips.

Opening to Traffic

• No traffic for 6-8 hours after laying.
• For single lanes, max speed 10 km/h allowed after 6-8 hours.
• Preferably open after 24 hours.

flowchart TD
    A[Aggregate Preparation] --> B[Mixing with Cationic Emulsion]
    B --> C[Sp

IRC 97 primarily focuses on road and bridge specifications, but explicit clauses on Safety and Environmental Considerations are not detailed in the provided context.

Key Safety & Environmental Guidelines (General Practice in IRC & IS Codes):

• Safety Considerations:

  • Ensure proper signage and barricading at construction sites.
  • Use personal protective equipment (PPE) for workers.
  • Follow load and stress limits to avoid structural failures.
  • Adhere to traffic management during construction to minimize accidents.

• Environmental Considerations:

  • Control dust and noise pollution during construction.
  • Proper disposal of construction waste as per IS: 2386 (Part-V) for aggregates.
  • Use bitumen emulsions (e.g., 20 mm thick premix carpet with cationic bitumen) to reduce volatile organic compounds (VOC).
  • Preserve natural drainage and avoid contamination of water bodies.

Reference Table: Premix Carpet Specification (from IRC context)

Summary Diagram: Safety & Environmental Workflow

flowchart TD
    A[Site Preparation] --> B[Safety Measures]
    B --> C[Use PPE & Signage]
    B --> D[Traffic Management]
    A --> E[Environmental Measures]
    E --> F[Dust & Noise Control]
    E --> G[Waste Disposal]
    E --> H[Water Protection]

For detailed safety and environmental clauses, refer to IRC:SP:55 and IS 456 for concrete structures, which complement IRC 97.

IRC 97 - References and Related Standards

IRC 97 primarily refers to Indian Standards (IS) relevant to road and bridge construction materials and testing. Key referenced IS codes include:

• IS 2386 (Part IV & V): Methods of test for aggregates for concrete
  • Part IV: Specific gravity, density, voids, absorption, and bulking
  • Part V: Soundness test

Important Specifications:

• IS 2386 (Part IV) and (Part V) guide aggregate quality, critical for concrete durability.
• Quantities of materials must comply with IS 2386 test results to ensure mix design accuracy.

Typical Parameters from IS 2386:

Usage:

• Use these tests to select aggregates ensuring strength, durability, and workability of concrete in road works.

flowchart TD
    A[Aggregate Sampling] --> B[IS 2386 Tests]
    B --> C[Specific Gravity]
    B --> D[Water Absorption]
    B --> E[Soundness Test]
    C & D & E --> F[Material Selection]
    F --> G[Concrete Mix Design]
    G --> H[Road/Bridge Construction]

This ensures compliance with IRC 97 and related IS codes for quality infrastructure.