sand for plaster

IS 1542: Scope Overview & Key Specifications

Scope (Clause 3.1)

• Defines terms related to sand grading and testing for plaster work.
• Applies to sand used for internal/external walls and ceiling plaster.

Key References (Clause 2.1)

• IS 383: Aggregates for concrete.
• IS 2386 (Part 1,2,3): Particle size, impurities, specific gravity, bulking.
• IS 2250: Masonry mortars.
• IS 2430: Sampling of aggregates.

Sand Grading for Plaster (Clause 5.1, Table 1)

• Grading outside limits by ≤5% (except 150, 300, 600 micron) is acceptable.

Additional Info (Clause 7.3)

• Suppliers may provide sand bulking data vs. moisture content graphically.

Summary: IS 1542 standardizes sand grading for plaster with defined sieve size passing percentages, referencing related IS codes for testing and sampling.

IS 1542 References (Clause 2.1) - Key Indian Standards Adjunct to IS 1542

Additional Notes:

• Clause 7.3 suggests supplying bulking of sand data with moisture content as a graph.
• These references ensure proper material quality and testing for concrete and masonry work per IS 1542.
• For detailed test methods and specifications, refer to the respective IS codes above.

Summary Diagram: Reference Linkage

graph LR
    A[IS 1542] --> B[IS 383: Aggregates Specification]
    A --> C[IS 1727: Pozzolanic Materials Test]
    A --> D[IS 2250: Masonry Mortars Code]
    A --> E[IS 2386: Aggregates Test Methods]
    A --> F[IS 2430: Sampling of Aggregates]

Use these standards collectively for comprehensive quality control in concrete and masonry materials as per IS 1542.

IS 1542 - Definitions & Key Specifications

1. Definitions (Clause 3.1)

• The standard applies specific definitions related to aggregates, mortar, and plaster materials as per IS 1542.
• Definitions align with related IS codes (e.g., IS 383 for aggregates, IS 2250 for masonry mortars).

2. Related Indian Standards (Clause 2.1)

3. Grading of Sand for Plaster (Clause 5.1, Table 1)

• Sand grading is analyzed per IS 2386 (Part 1).
• Minor deviations (≤5%) allowed except for 150, 300, 600 micron sieves.

Summary Diagram: Key Relationships

graph TD
    IS1542 --> IS383[Aggregates Specification]
    IS1542 --> IS2250[Masonry Mortars]
    IS1542 --> IS2386[Aggregate Testing]
    IS1542 --> IS2430[Sampling Aggregates]
    IS1542 --> Grading[Sand Grading Table]

Use this information to ensure materials comply with IS 1542 definitions and grading for quality plaster work.

IS 1542: Quality of Sand - Key Points

1. Types of Sand (Clauses 3.4 & 4.3)

• Natural sand, crushed stone sand, crushed gravel sand, or their combination.
• Must be hard, durable, clean, free from organic matter, clay, silt, dust beyond limits.

2. Water for Gauging (Clause 4.4.1)

• Water amount adjusted to achieve flow between 110 to 115 mm with 25 drops in 15 seconds (per IS 1727:1967).

3. Grading and Fineness Modulus (Clause 5)

• Fineness Modulus (F.M) range: 1.2 to 2.2.
• Preferable F.M:
  • Crushed stone/gravel sand: ≥ 1.4
  • Natural sand: ≥ 1.5
• Amendment: 0-15% passing through 150 micron sieve.

4. Typical Grading Table (IS 1542 Table 1 excerpt)

Fineness Modulus Formula:

[ \text{F.M} = \frac{\text{Sum of cumulative % retained on standard sieves}}{100} ]

flowchart LR
    A[Source of Sand] --> B{Type}
    B --> C[Natural Sand]
    B --> D[Crushed Stone Sand]
    B --> E[Crushed Gravel Sand]
    C --> F[Check F.M ≥ 1.5]
    D --> G[Check F.M ≥ 1.4]
    E --> G
    F & G --> H[Check grading per Table 1]
    H --> I[Check water for gauging per IS 1727]
    I --> J

IS 1542: Grading of Sand for Plaster Work (Clause 5.1 & Table 1)

The sand grading for plaster (internal/external walls & ceilings) as per IS 2386 (Part 1):1973 is:

• A total deviation of up to 5% (except for 150, 300, 600 micron sieves) is acceptable.
• Sand should be hard, durable, clean, free from clay, silt, dust, and organic matter (Clause 4.3).
• Grading can be achieved by screening or blending natural/crushed sands (Clause 5.4).
• Water for gauging should produce a flow of 110-115 mm with 25 drops in 15 seconds (IS 1727:1967, Clause 4.4.1).

This ensures proper workability and durability of plaster mortar.

flowchart LR
    A[Sand Source] --> B{Screening/Blending}
    B --> C[Achieve Grading as per Table 1]
    C --> D[Use in Plaster Mortar]
    D --> E[Check Workability]
    E --> F{Flow 110-115 mm with 25 drops in 15 sec}

IS 1542 Sampling and Testing - Key Points

Sampling (Clause 6.1)

• Sampling must follow IS 2430:1986.
• Quantity of sample for each test as per IS 2386 relevant parts and Clause 4.4 of IS 1542.
• Proper representative sampling ensures reliable test results.

Testing (Reference Standards)

• Particle size, shape, deleterious materials, organic impurities: IS 2386 (Parts 1 & 2)
• Specific gravity, density, voids, absorption, bulking: IS 2386 (Part 3)
• Pozzolanic materials: IS 1727:1967
• Preparation and use of masonry mortars: IS 2250:1981

Key Specifications

• Grading achieved by screening/blending natural or crushed stone sands (Clause 5.4).
• Supplier should provide bulking info vs. moisture content graph (Clause 7.3).

Typical Sampling & Testing Workflow (Mermaid Diagram)

flowchart TD
    A[Sampling as per IS 2430] --> B[Sample Quantity as per IS 2386]
    B --> C[Tests Conducted]
    C --> D[Particle Size & Shape (IS 2386-1)]
    C --> E[Deleterious Materials (IS 2386-2)]
    C --> F[Specific Gravity & Absorption (IS 2386-3)]
    C --> G[Bulking & Moisture Content]
    C --> H[Pozzolanic Material Test (IS 1727)]

Summary Table: Sample Quantities (Indicative from IS 2386)

Note: Always refer to the latest IS codes for exact sample sizes and detailed procedures.

IS 1542 - Additional Information to be Furnished by the Supplier

Key Specifications (Clauses 7.1 to 7.3):

• Clause 7.1: Supplier to provide (on request):

  • Source of supply (exact quarry/pit location)
  • Trade group of principal rock type (for manufactured sand, per IS 383:1970 Appendix C)
  • Particle size grading (per IS 2386 Part 1:1963)

• Clause 7.2: Supplier to furnish (subject to prior agreement):

  • Specific Gravity of Sand (per IS 2386 Part 3:1963)
  • Bulk Density (per IS 2386 Part 3:1963)

• Clause 7.3: If possible, provide a bulking of sand vs. moisture content graph.

Relevant IS 2386 (Part 3) Test Formulas:

• Specific Gravity (G):

[ G = \frac{\text{Weight of oven-dried sand in air}}{\text{Loss of weight in water}} ]

• Bulk Density (ρ_bulk):

[ \rho_{bulk} = \frac{\text{Mass of sand}}{\text{Volume occupied including voids}} ]

Summary Table: Additional Information

flowchart TD
    A[Supplier] -->|Provide on request| B[Source of Supply]
    A -->|Provide on request| C[Rock Type Trade Group]
    A -->|Provide on request| D[Particle Size Grading]
    A -->|Subject to agreement| E[Specific Gravity]
   

IS 1542: Compressive Strength Requirements for Mortar

Key Specifications (Clause 4.4)

• Mortar mix: 1 part cement : 6 parts sand (by volume).
• Sand must conform to the grading in Table 1 (Clause 5.1).
• Average compressive strength of mortar cubes at 28 days ≥ 3 N/mm².
• Testing as per IS 2250:1981 Appendix A (standard mortar cube test procedure).

Sand Grading for Mortar (Table 1, Clause 5.1)

• Fineness Modulus (FM): 1.2 to 2.2 (preferably ≥1.4 for crushed sands, ≥1.5 for natural sands).

Summary Formula for Compressive Strength Check

[ f_c = \frac{P}{A} \geq 3 \text{ N/mm}^2 ]

• (f_c) = compressive strength of mortar cube
• (P) = load at failure (N)
• (A) = cross-sectional area of cube (mm²)

References for Further Details

• IS 2250:1981 — Mortar preparation & testing
• IS 2386 (Part 1) — Particle size analysis for sand
• IS 383:1970 — Aggregates specification

flowchart TD
    A[Mortar Mix 1:6] --> B[Sand Grading as per Table 1]
    B --> C[Test Mortar Cubes]
    C --> D{Compressive Strength ≥ 3 N/mm²?}
    D -->|Yes| E[Accept Mortar]
    D -->|No| F[Reject Mortar]

This ensures mortar quality suitable for plastering and masonry as per IS

IS 1542: Permissible Limits of Deleterious Materials in Sand

Key Limits (Clause 4.3 & 1.18)

Specifications (Clause 4.2)

• Sand must be free from harmful impurities such as:
  • Iron pyrites, alkalis, salts
  • Coal, mica, shale, soft fragments
  • Sea shells, organic impurities
• These impurities must not adversely affect plaster strength, durability, appearance, or cause metal corrosion.

Organic Impurities Test (Clause 6.2.2)

• Determined by color comparison of liquid extract with standard solution per IS 2386 (Part 2):1963 and IS 2336 (Part 2):1963.

Summary Formula for Clay/Silt Content:

[ \text{Clay/Silt %} = \frac{\text{Weight of clay, silt, dust}}{\text{Total weight of sand sample}} \times 100 \leq 5% ]

flowchart LR
    A[Sand Sample] --> B{Test for Deleterious Materials}
    B -->|Clay, Silt, Dust| C[IS 2386 (Part 2):1963]
    B -->|Organic Impurities| D[Color Comparison - IS 2336]
    B -->|Harmful Impurities| E[Visual & Chemical Inspection]
    C --> F{Limit ≤ 5%}
    D --> G{Acceptable Color}
    E --> H{No Adverse Effects}
    F & G & H --> I[Sand Accepted]

Note: For crushed stone sands, higher dust content (up to 20%) may be agreed upon between supplier and purchaser.

IS 1542: Particle Size Distribution for Sand (Plaster Work)

Key Specifications (Clause 5.1 & Table 1)

• Particle sizes should be uniformly distributed throughout the sand mass (Clause 5.3).
• Minor deviations (up to 5%) allowed except for 150, 300, 600 micron sieves.
• Fineness Modulus (FM) ranges:
  • Natural sands: 1.5 (preferred minimum)
  • Crushed sands: 1.4 (preferred minimum)
  • Overall range: 1.2 to 2.2

Fineness Modulus Calculation:

[ FM = \frac{\text{Sum of cumulative % retained on standard sieves}}{100} ] (Standard sieves: 4.75 mm, 2.36 mm, 1.18 mm, 600 µm, 300 µm, 150 µm)

Additional Notes:

• Particle size grading analysis per IS 2386 (Part 1): 1973.
• Rounding off test results as per IS 2:1960.
• Supplier must provide particle size grading on request (Clause 7.1a).

flowchart LR
    A[Sand Sample] --> B[Sieving through IS Sieves]
    B --> C{Measure % Passing}
    C --> D[Compare with Table 1 Limits]
    D --> E{Within Limits?}
    E -->|Yes| F[Accept Sand]
    E -->|No| G[Check Deviation ≤ 5% (except 150,300,600 µm)]
    G -->|Yes| F
    G -->|No| H[Reject or Reprocess]

This ensures sand quality suitable for durable plastering work

IS 1542 refers to specifications for sand for masonry mortars. Regarding Bulk Density and Specific Gravity, the key points are:

References:

• Both properties are determined as per IS 2386 (Part 3): 1963 - "Methods of test for aggregates for concrete: Specific gravity, density, voids, absorption and bulking."

Definitions:

• Specific Gravity (G): Ratio of the density of sand particles to the density of water.
• Bulk Density (ρ_bulk): Mass of sand per unit volume including the voids between particles.

Key Formulas:

Typical Values (from IS 2386 Part 3):

Additional Notes:

• Bulk density varies with moisture content due to bulking.
• Clause 7.3 of IS 1542 suggests furnishing bulking data as a graph vs. moisture content.
• Supplier should provide these values on request.

flowchart LR
    A[Sand Sample] --> B[Measure Mass (oven-dried)]
    A --> C[Measure Volume (displacement method)]
    B & C --> D[Calculate Specific Gravity G = Mass/Volume]
    A --> E[Fill container, measure Bulk Volume]
    B & E --> F[Calculate Bulk Density = Mass/Bulk Volume]

This concise summary aligns with IS 1542 and IS 2386 (Part 3) requirements for sand properties.

IS 1542 Key Points on Blending and Screening of Sands

1. Blending & Screening (Clause 5.4)

• To achieve required grading, natural sands or crushed stone screenings (which alone may be unsuitable) can be blended or screened.
• This improves particle size distribution for plaster work.

2. Sand Specifications (Clause 4.3)

• Sand must be hard, durable, clean, free from coatings, organic matter.
• Clay, silt, dust content limited as per clause 4.3(a).

3. Grading of Sand (Clause 5.1 and Table 1)

• Grading analyzed as per IS 2386 (Part 1): 1973.
• Slight deviations (≤5%) allowed except for 150, 300, 600 micron sieves.

4. Fineness Modulus (Clause 1.2b)

• Fineness Modulus (FM) range: 1.2 to 2.2.
• Preferable FM:
  • ≥1.4 for crushed stone/gravel sands.
  • ≥1.5 for natural sands.

Summary Formula for Fineness Modulus (FM):

[ FM = \frac{\text{Sum of cumulative % retained on standard sieves}}{100} ]

Where standard sieves are (in mm): 4.75, 2.36, 1.18, 0.6, 0.3, 0.15, 0.075.

This ensures sand grading suitable for plaster work by blending/screening to meet the above particle size distribution and FM criteria.

Supplier Responsibilities as per IS 1542

1. Testing (Clause 6.2)

• Duplicate tests must be made unless otherwise stated.
• Tests requested by purchaser or representative to comply with relevant clauses.
• Both test results to be reported.

2. Additional Information to be Furnished (Clause 7)

Notes:

• Specific gravity and bulk density are determined as per IS 2386 (Part 3):1963.
• Particle size grading as per IS 2386 (Part 1):1963.
• Bulking information helps in adjusting mix proportions due to volume changes with moisture.

Quick Reference Table for Supplier Info

This ensures transparency and quality control in supply of sand per IS 1542.

IS 1542: Testing Procedures - Key Points

• Clause 6.2:

  • Tests requested by purchaser or representative must follow relevant clauses of IS 1542.
  • Duplicate tests are mandatory unless specified otherwise. Results of both tests must be reported.

• Sampling & Testing References (Clause 2.1):
  Testing procedures rely on related IS codes for materials:

  IS No.	Title
  IS 383:1970	Aggregates for concrete
  IS 1727:1967	Test for pozzolanic materials
  IS 2250:1981	Masonry mortars preparation
  IS 2386 (Parts 1-3):1963	Aggregate testing (particle size, impurities, specific gravity, absorption)
  IS 2430:1986	Sampling of aggregates

• Additional Supplier Info (Clause 7.3):

  • Bulking of sand with moisture variation should be provided graphically if possible.

Typical Testing Procedure Flow (Summary)

flowchart TD
    A[Sampling] --> B[Preparation]
    B --> C[Physical Tests]
    C --> D[Chemical Tests]
    D --> E[Duplicate Testing]
    E --> F[Reporting Results]

Important Notes:

• Follow IS 2386 for detailed test methods on aggregates.
• Duplicate tests ensure reliability.
• Supplier to provide bulking data graph if available.

For detailed formulas and tables, refer to the respective IS codes mentioned above.

IS 1542 does not explicitly provide detailed formulas or tables in its annexes/appendices based on the provided context. However, key references and specifications related to aggregates and materials are listed, which are essential adjuncts for compliance.

Key Specifications and References (Clause 2.1):

Additional Notes (Clause 7.3):

• Suppliers may provide bulking of sand vs. moisture content data as a graph.

General Recommendations for Annexes and Appendices in IS Codes:

• Include tables of material properties (e.g., specific gravity, grading limits).
• Provide formulas for calculations such as bulking correction, mix proportions.
• Present graphs for properties varying with moisture or other parameters.

Typical Formula for Bulking of Sand:

[ V_b = V_d (1 + \frac{B}{100}) ] Where:

• (V_b) = Bulk volume of sand
• (V_d) = Dry volume of sand
• (B) = Bulking percentage (depends on moisture content)

If you need specific formulas or tables, refer to the related IS standards cited above (e.g., IS 383, IS 2386).