IS 134681992AI Search Enabled✦ AI Generated

Apparatus for determination of dry density of soil by core cutter method-

IS 13468:1992 specifies the requirements for apparatus used to determine the dry density of soil in situ by the core cutter method. It details the design, materials, dimensions, and marking of the cylindrical core cutter, steel dolly, and steel rammer used primarily for fine-grained natural or compacted soils free from aggregates. This standard is essential for civil and geotechnical engineers conducting soil density tests to ensure accurate and reliable field measurements.

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26Clauses Indexed
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1992Edition
Soil and Foundation EngineeringCategory
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What This Standard Covers

IS 13468:1992 specifies the requirements for apparatus used to determine the dry density of soil in situ by the core cutter method. It details the design, materials, dimensions, and marking of the cylindrical core cutter, steel dolly, and steel rammer used primarily for fine-grained natural or compacted soils free from aggregates. This standard is essential for civil and geotechnical engineers conducting soil density tests to ensure accurate and reliable field measurements.

Who Uses This Standard

  • Geotechnical Engineers
  • Civil Engineers
  • Soil Testing Laboratory Technicians
  • Construction Quality Control Inspectors
  • Foundation Engineers
  • Field Surveyors
  • Research and Development Professionals in Soil Mechanics

Key Topics Covered

Apparatus components and design specifications
Material requirements for core cutter, dolly, and rammer
Dimensional tolerances and construction standards
Marking and identification of equipment
Case hardening and steel specifications
Compatibility with IS 2720 (Part 29) soil testing methods
Manufacturing and quality control guidelines
Use of standard marks and certification
Handling and assembly of apparatus parts
Safety and durability considerations
Reference to related Indian Standards
Equipment maintenance and calibration

Table of Contents

1Scope

IS 13468: Scope - Key Specifications & Tables


1. Scope Summary (Clause 3.1)

Material of construction for equipment parts is specified in Table 1:

Equipment PartMaterialSpecial RequirementRelevant IS Standard
Cutter (seamless steel tube)Case hardening steelTip case hardened to ≥ 40 HRCIS 4432 : 1988
Dolly (with lip)Case hardening steelNoneIS 4432 : 1988
RammerSteelNoneIS 1875 : 1978
Handic for rammerMild steel tubeNoneIS 1239 (Part 1) : 1990

2. Dimensions & Tolerances (Clause 4.1)

  • Dimensions for parts shown in Fig. 1 to Fig. 3 (not included here).
  • Tolerances as per IS 2102 (Part 1): 1980, medium class.
  • All dimensions in millimeters.

3. Marking (Clause 5.1.1)

  • Equipment may bear the Standard Mark under BIS licensing.

4. Referenced Standards (Clause 2.1)

  • IS 1239 (Part 1): 1990 — Mild steel tubes
  • IS 1875: 1978 — Carbon steel billets/bars for forgings
  • IS 4432: 1988 — Case hardening steels
  • IS 2102 (Part 1): 1980 — General tolerances for dimensions

Summary Diagram of Material Flow

graph TD
A[Equipment Parts] --> B[Cutter]
A --> C[Dolly]
A --> D[Rammer]
A --> E[Handic]

B --> F[Case hardening steel, Tip ≥ 40 HRC]
C --> G[Case hardening steel]
D --> H[Steel]
E --> I[Mild steel tube]

Use IS 13468 along with referenced IS codes for detailed design, material, and tolerance compliance.

2References

IS 13468: Key References, Materials & Specifications

1. References (Clause 2.1):
The following Indian Standards are essential adjuncts:

IS No.Title
IS 1239 (Part 1): 1990Mild steel tubes, tubulars, and fittings
IS 1875: 1978Carbon steel billets, blooms, slabs, and bars for forgings
IS 2102 (Part 1): 1980General tolerances for linear and angular dimensions (medium class)
IS 4432: 1988Specification for case-hardening steels

2. Materials of Construction (Table 1, Clause 3.1):

PartMaterialSpecial RequirementIS Standard
Cutter (Fig. 1)Case hardening steelTip hardened to min 40 HRCIS 4432:1988
Dolly (Fig. 2)Case hardening steel-IS 4432:1988
Rammer (Fig. 3)Steel-IS 1875:1978
Handic for RammerMild steel tubePush fitted or screwedIS 1239 (Part 1):1990

3. Dimensions & Tolerances (Clause 4.1):

  • Follow Fig. 1 to Fig. 3 for dimensions.
  • Use IS 2102 (Part 1):1980 medium class tolerances unless otherwise stated.

4. Marking (Clause 5.1.1):

  • Equipment may carry the BIS Standard Mark ensuring compliance and quality.

Summary Table for Quick Reference

AspectDetails
Material StandardsIS 1239, IS 1875, IS 4432
TolerancesIS 2102 (Part 1):1980 medium class
HardeningCutter tip min 40 HRC
MarkingBIS Standard Mark

flowchart TD
    A[IS 13468 Equipment] --> B[Material Selection]
    B --> C[Cutter - Case Hardening Steel (IS 4432)]
    B --> D[Dolly - Case Hardening
3Materials of Construction

IS 13468: Materials of Construction - Key Details

Table 1: Materials of Construction for Equipment Parts

Equipment PartMaterialSpecial RequirementRelevant IS Standard
Cutter (seamless steel tube, beveled)Case hardening steelTip case hardened to 40 HRC minIS 4432 : 1988
Dolly (with lip for cutter fitting)Case hardening steelNoneIS 4432 : 1988
RammerSteelNoneIS 1875 : 1978
Handic for rammer (push fitted/screwed)Mild steel tubeNoneIS 1239 (Part 1) : 1990

Specifications & Notes:

  • Case Hardening Steel: Ensures wear resistance, especially for cutter tips.
  • Tip Hardness: Minimum 40 HRC for cutting edges.
  • Dimensions and tolerances follow IS 2102 (Part 1): 1980 (medium class).
  • Mild steel tubes per IS 1239 (Part 1): 1990 for tubular parts.
  • Steel billets, blooms, slabs, and bars comply with IS 1875: 1978.

Summary:

  • Use case hardening steel for wear-critical parts (cutter, dolly).
  • Use mild steel tubes for handles.
  • Follow dimensional tolerances as per IS standards referenced.
flowchart TD
    A[Equipment Parts] --> B[Cutter: Case hardening steel, 40 HRC tip]
    A --> C[Dolly: Case hardening steel]
    A --> D[Rammer: Steel]
    A --> E[Handic: Mild steel tube]

This ensures durability and compliance with IS 13468 for construction materials.

4Dimensions and Tolerances

IS 13468: Dimensions and Tolerances Summary

1. Dimensions & Tolerances (Clause 4.1)

  • Dimensions of equipment parts are as per Fig. 1 to Fig. 3 (not included here).
  • All dimensions are nominal.
  • Tolerances follow IS 2102 (Part 1): 1980 Medium Class for linear and angular dimensions.

2. Materials (Table 1)

Equipment PartMaterialSpecial RequirementRelevant IS
Cutter (seamless tube, beylled end)Case hardening steelTip hardened to 40 HRC minIS 4432:1988
Dolly (steel with lip)Case hardening steel-IS 4432:1988
RammerSteel-IS 1875:1978
Handic for RammerMild steel tube-IS 1239 (Part 1):1990

3. Reference Standards (Clause 2.1)

  • IS 2102 (Part 1): 1980 — General tolerances for dimensions.
  • IS 4432: 1988 — Case hardening steels.
  • IS 1875: 1978 — Carbon steel billets, blooms, slabs, bars for forgings.
  • IS 1239 (Part 1): 1990 — Mild steel tubes.

Typical Tolerance Application (from IS 2102 Part 1: 1980 Medium Class)

Nominal Size (mm)Tolerance (mm)
Up to 10±0.1
10 to 30±0.2
30 to 100±0.3
100 to 300±0.5

Notes:

  • All dimensions are in millimeters.
  • Corners are rounded off.
  • Hardened cutting edges as specified for cutters.
  • Use Standard Mark under BIS regulations for quality assurance.
graph TD
A[Equipment Parts] --> B[Cutter]
A --> C[Dolly]
A --> D[Rammer]
A --> E[Handic for Rammer]

B --> F[Case Hardening Steel]
5Marking

IS 13468 - Marking: Key Specifications

Clause 5.1 - Marking Requirements

Each equipment must be clearly and indelibly marked with:

  • a) Manufacturer’s name or registered trademark or both.
  • b) Serial number of the product.

Clause 5.1.1 - Standard Mark

  • Equipment may also carry the Standard Mark as per BIS regulations.
  • The Standard Mark assures compliance with IS standards, quality control, and ongoing BIS inspection.

Table 1 - Materials of Construction

Equipment PartMaterialSpecial RequirementRelevant IS
Cutter (seamless steel tube, beyelled end)Case hardening steelTip case hardened to 40 HRC minIS 4432:1988
Dolly (steel with lip)Case hardening steel-IS 4432:1988
RammerSteel-IS 1875:1978
Handle for rammerMild steel tubePush fitted or concentrically screwedIS 1239 (Part I):1990

Notes on Marking:

  • Marking must be durable and legible throughout the product life.
  • Use of Standard Mark is governed by BIS Act 1986 and related rules.

flowchart TD
    A[Equipment] --> B[Mark Manufacturer Name/Trademark]
    A --> C[Mark Serial Number]
    A --> D[Optional: BIS Standard Mark]
    D --> E[Assures Quality & Compliance]

For full details, refer to Clause 5 and Table 1 of IS 13468.

6Manufacturer's Identification

Manufacturer's Identification per IS 13468

Clause 5.1 Requirements:

  • Marking on each equipment must include:
    • Manufacturer's name or registered trademark or both.
    • Serial number of the product.

Clause 5.1.1:

  • Equipment may be marked with the Standard Mark (BIS mark), indicating compliance with the standard and quality assurance.

Materials of Construction (Table 1 Summary)

Equipment PartMaterialSpecial RequirementRelevant IS
Cutter (seamless steel tube, beveled end)Case hardening steelTip case hardened to 40 HRC minIS 4432:1988
Dolly (with lip)Case hardening steel-IS 4432:1988
RammerSteel-IS 1875:1978
Handle for rammerMild steel tubePush fitted or concentrically screwedIS 1239 (Part I):1990

Notes on Standard Mark

  • Governed by BIS Act 1986.
  • Ensures product conformity via inspection, testing, and quality control.
  • Use of Standard Mark requires license from BIS.

Summary Diagram: Marking & Material Flow

flowchart TD
    A[Equipment] --> B{Marking}
    B -->|Manufacturer Name/Trademark| C[Indelible Marking]
    B -->|Serial Number| C
    B -->|Optional| D[Standard Mark (BIS)]
    A --> E[Material of Construction]
    E --> F[Cutter - Case Hardening Steel (Tip 40 HRC)]
    E --> G[Dolly - Case Hardening Steel]
    E --> H[Rammer - Steel]
    E --> I[Handle - Mild Steel Tube]

Key takeaway: Ensure indelible marking of manufacturer ID and serial number on equipment; optionally include BIS Standard Mark for quality assurance. Use specified materials per Table 1 with relevant IS standards.

7Quality and Certification

IS 13468: Quality and Certification - Key Points

1. Quality Certification & Standard Mark

  • Equipment can bear the Standard Mark under BIS certification.
  • The Standard Mark ensures:
    • Compliance with IS 13468 and related standards.
    • Production under a strict system of inspection, testing, and quality control supervised by BIS.
    • Continuous conformity checks by BIS.
  • Licence for the Standard Mark is granted under the BIS Act, 1986.

2. Materials of Construction (Table 1 Highlights)

Equipment PartMaterialSpecial RequirementRelevant IS Standard
Cutter (seamless steel tube)Case hardening steelTip hardened to 40 HRC minIS 4432 : 1988
Dolly (fitted on cutter)Case hardening steelNoneIS 4432 : 1988
RammerSteelNoneIS 1875 : 1978
Handic for rammerMild steel tubePush fitted or screwedIS 1239 (Part I) : 1990

3. Relevant Indian Standards for Reference

  • IS 4432:1988 – Case hardening steels
  • IS 1875:1978 – Carbon steel billets and bars for forgings
  • IS 1239 (Part I):1990 – Mild steel tubes

4. Additional Notes

  • Dimensions and tolerances conform to relevant IS standards.
  • BIS headquarters and regional offices handle certification and enquiries.

Summary Diagram: Quality Certification Flow

flowchart TD
    A[Manufacturer] --> B[Production under IS 13468]
    B --> C[Quality Control & Testing]
    C --> D{BIS Inspection}
    D -->|Pass| E[Standard Mark License]
    D -->|Fail| F[Rectification]
    E --> G[Continuous Surveillance by BIS]

This ensures equipment meets durability, safety, and performance criteria as per IS 13468.

8Annexures (Figures and Diagrams)

IS 13468 Annexures (Figures and Diagrams) Key Points:

1. Materials of Construction (Table 1)

PartMaterialSpecial RequirementIS Reference
Cutter (Fig.1)Case hardening steelTip case hardened ≥ 40 HRCIS 4432 : 1988
Dolly (Fig.2)Case hardening steelWith lip fitting on cutterIS 4432 : 1988
Rammer (Fig.3)SteelIS 1875 : 1978
HandicMild steel tubePush fitted or screwedIS 1239 (Part I):1990

2. Dimensions & Tolerances (Clause 4.1)

  • Dimensions per Figures 1 to 3.
  • Tolerances as per IS 2102 (Part 1): 1980 (Medium class).
  • All dimensions in millimeters.
  • Cutter tip edge is hardened; corners rounded.

3. Marking (Clause 5.1.1)

  • Equipment may bear the Standard Mark ensuring compliance and quality control under BIS supervision.

Summary Diagram of Equipment Parts:

graph LR
A[Cutter] --> B[Dolly]
B --> C[Rammer]
C --> D[Handic]

Note: For exact dimensions and detailed diagrams, refer to Figures 1-3 in IS 13468. Use IS 2102 for tolerance values.

Popular Questions About IS 13468

?What materials are specified for the core cutter and rammer in IS 13468?

IS 13468 specifies the apparatus for determining dry density of soil by the core cutter method but does not explicitly mention materials for the core cutter and rammer in the provided clauses.

Based on standard practice and IS 2720 (Part 29):

  • Core Cutter: Usually made of mild steel or stainless steel for durability and corrosion resistance.
  • Ramner and Dolly: Made of steel, often hardened or tempered to withstand repeated impacts.

Key points:

  • Material must be rigid, durable, and corrosion resistant.
  • Steel ensures dimensional stability and accurate volume measurement.

Typical Material Summary:

ComponentMaterialReason
Core CutterMild Steel/Stainless SteelStrength, corrosion resistance
RammerHardened SteelImpact resistance
DollyHardened SteelDurability
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This ensures reliable and repeatable soil density measurements.

?What are the dimensional tolerances for the apparatus components?

Dimensional Tolerances for Apparatus Components (IS 13468)

  • Dimensions and tolerances for different parts are specified in Fig. 1 to Fig. 3 of IS 13468.
  • All dimensions are nominal unless otherwise stated.
  • Tolerances follow IS 2102 (Part 1): 1980 - Medium Class general tolerances for linear and angular dimensions.
  • Materials and special requirements for parts are given in Table 1 (e.g., cutter: case-hardened steel, tip hardened to 40 HRC).
  • Typical components:
    • Cutter: Seamless steel tube, beveled end (Fig.1)
    • Dolly: Steel with lip (Fig.2)
    • Rammer: Steel (Fig.3)
    • Handic: Mild steel tube, push-fitted or screwed

Summary of Tolerances Reference:

ComponentDimension SourceTolerance Standard
All apparatus partsFig. 1 to Fig. 3IS 2102 (Part 1): 1980 (Medium Class)

Key:

  • IS 2102 tolerances example for medium class (linear dimensions):
Dimension Range (mm)Tolerance (mm)
Up to 30±0.2
30 to 120±0.3
120 to 400±0.5

Refer to IS 13468 figures for exact dimensions and IS 2102 for detailed tolerance tables.

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Note: Always verify dimensions against the latest edition of IS 13468 and IS 2102.

?How is the equipment marked to ensure traceability and compliance?

According to IS 13468 Clause 5.1:

  • Each equipment must be clearly and indelibly marked with:

    • Manufacturer's name or registered trade-mark or both.
    • Serial number of the product for traceability.
  • Per Clause 5.1.1, the equipment may also bear the Standard Mark of BIS, indicating compliance with the Indian Standard under BIS supervision.

Summary of Marking Requirements:

Marking DetailPurpose
Manufacturer name/trade-markIdentifies the producer
Serial numberEnsures unique traceability
Standard Mark (optional)Certifies compliance with BIS standards

This marking ensures traceability, quality assurance, and conformity to IS 13468.

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Note: Markings must be durable and legible throughout the equipment's life.

?Which soils is the core cutter method apparatus suitable for testing?

The core cutter method apparatus as per IS 13468 is suitable for:

  • Fine-grained natural or compacted soils
  • Soils free from aggregates (i.e., without coarse particles like gravel or stones)

Key points:

  • The apparatus includes a cylindrical core cutter, steel dolly, and steel rammer.
  • It is designed to determine in-place dry density.
  • Applicable mainly to soils where core cutting is feasible without disturbance, typically clays, silts, and fine sands.
  • Not suitable for coarse-grained soils with large aggregates, as these can hinder accurate volume measurement.

Summary:

Soil TypeSuitable for Core Cutter Method?
Fine-grained soilsYes
Compacted soilsYes
Soils with aggregatesNo

This aligns with IS 2720 (Part 29) for dry density determination by core cutter.

?How does IS 13468 relate to IS 2720 (Part 29) for soil density determination?

Relationship between IS 13468 and IS 2720 (Part 29):

  • IS 13468 (1992) specifies the apparatus requirements for determining the dry density of soil using the core cutter method.
  • IS 2720 (Part 29) (1975) describes the procedure and methodology for determining the dry density of soil in situ using the core cutter method.
  • Essentially, IS 13468 provides the standard specifications for the equipment used to perform the test prescribed in IS 2720 (Part 29).

Summary:

StandardFocus
IS 13468Apparatus specification for core cutter method
IS 2720 Pt 29Test procedure for dry density by core cutter

This ensures compatibility and accuracy in soil density determination by standardizing both the equipment and the method.

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