Material constants in building works

IS 10067: Material Constants in Building Works - Foreword & Key Tables

Foreword Highlights:

• Covers material constants (excluding wastage) for common building items.
• Wastage varies by region, source, season, and usage; users must assess locally.
• Water-cement ratio targets flow of 110 ± 5%.

Key Tables:

1. Material Constants for Mortar (per m³ mortar)

2. Material Constants for Concrete (per m³ concrete)

IS 10067 - Scope & Key Material Constants

Scope (Clause 1.1)

• Covers material constants (excluding wastages) for common building items.
• Wastage % varies by region, source, season, etc., and must be assessed by the user.
• Not exhaustive; additional items will be added as data becomes available.

Key Material Constants for Concrete Mixes (Clause 2.2, Table 2.4)

• For crushed aggregate, increase constants by 5% (lean mixes) and 7% (richer mixes).
• Lime concrete and special finishes have separate constants (refer to IS 10067 Table 2.4).

Notes:

• Cement

IS 10067: Material Constants Summary

1. Material Constants for Concrete (Clause 2.2)

• Table 2 provides standard material constants for cement concretes and lime concretes.
• Constants include:
  • Cement content per cubic meter
  • Water content
  • Fine and coarse aggregate quantities
  • Lime content for lime concretes

2. General Notes

• Constants exclude wastage.
• Wastage varies by region, season, and handling; users must assess locally.
• Values are rounded as per the standard's rounding rules.

Typical Material Constants Table (Example Format from IS 10067 Table 2)

Note: Actual values should be confirmed from the latest edition of IS 10067.

Usage Tips:

• Use these constants for estimating material quantities in building works.
• Adjust for wastage and site conditions.
• Refer to IS 10067 for detailed tables and rounding rules.

flowchart TD
    A[Material Constants] --> B[Cement Concrete]
    A --> C[Lime Concrete]
    B --> D[Table 2: Cement, Water, Aggregates]
    C --> E[Table 2: Lime Content, Aggregates]
    F[User] --> G[Adjust for Wastage]

For precise values, always consult the latest IS 10067 edition.

IS 10067 - Mortar: Key Formulas, Tables & Specifications

1. Mortar Mix Ratios & Material Constants (Table 2.4, Clause 2.1)

• Water-cement ratio: For 110 ± 5% flow.
• Sand: Fineness modulus ~1.26, per IS 1542 & IS 2116.

2. Mortar for Brickwork (Clause 2.9, Table 3)

IS 10067 Key Concrete Material Constants & Mix Ratios

1. Concrete Mix Ratios & Material Constants (Table 2, Clause 2.2)

• For crushed aggregate, increase constants by 5% (lean mixes) or 7% (richer mixes).

2. Cement Concrete Flooring (Table 5, Clause 2.4.1)

IS 10067 - Key Formulas & Tables for Brickwork

1. Material Constants for Brickwork

Traditional Bricks (Size: 2.9 x 11.1 x 7.0 cm with 1 cm mortar joints)

Mortar consumption per m³ brickwork: 0.234 m³ (Frogup), 0.203 m³ (Frogdown)
Sand & cement reduced by 2% if coarse sand (FM 2.9) used.

Modular Bricks

IS 10067 Flooring Key Data Summary

1. Cement Concrete Flooring (Clause 2.4.1, Table 5)

• Mix ratio: 1 : 2 : 4 (Cement : Sand : Shingle 20 mm nominal)
• Floating coat of neat cement finish.
• Increase material quantities by 7% if crushed aggregate replaces shingle.

2. Terrazzo (Marble Chips) Flooring (Clause 2.4.2, Table 6)

• Under layer: 1 : 2 : 4 cement concrete.
• Top layer: Marble chips mixed with cement and marble powder binder.

Notes:

• Quantities are per 10 m² flooring area.
• Thicknesses and mix ratios are critical for strength and finish quality.
• Floating coat improves surface finish and durability

Key Specifications for Cement Concrete Flooring (IS 10067)

1. Material Constants for Cement Concrete Flooring (Clause 2.4.1, Table 5)

• Note: Increase quantities by 7% if crushed aggregate replaces shingle.

2. Material Constants per m³ of Concrete (Clause 2.2, Table 2)

• Increase constants by 5% (lean mixes) or 7% (richer mixes) for crushed aggregates.

3. Mortar Mix Constants (Clause 2.1)

IS 10067: Terrazzo (Marble Chips) Flooring Key Data

Material Constants for Terrazzo Flooring (per 10 m²) — Clause 2.4.2, Table 6

Specifications:

• Under layer: Cement concrete 1:2:4 with 20 mm nominal gauge shingle.
• Top layer: Marble chips mixed with binder (cement + marble powder in 3:1 ratio by weight), chips:binder ratio 1:1.
• Thickness: 40 mm total (under + top layer).

Notes:

• Use Grade 0 (2-4 mm chips) for 5 mm top layer.
• Use Grade 2 (7-10 mm chips) for 10 mm top layer.
• Polished to granolithic finish.

Quick Formula for Binder Mix (Top Layer):

[ \text{Binder} = \text{Cement} + \text{Marble Powder} \quad \text{in ratio} \quad 3:1 ]

[ \text{Chips} : \text{Binder} = 1 : 1 \quad \text{by weight} ]

flowchart LR
    CC1[Under Layer: 30-35 mm CC 1:2:4]
    TopLayer[Top Layer: 5-10 mm Marble Chips + Binder]
    Binder[Cement + Marble Powder (3:1)]
   

IS 10067: Key Formulas & Tables for Plastering

1. Plaster Mix Ratios & Material Constants (Table 7, Clause 2.5)

Note: Thickness of joints and raking depth = 1 cm for calculations.

2. Sand & Aggregate Specifications

• Use fine sand for plastering as per IS 2116.
• Sand for masonry mortars should be clean, sharp, and well-graded.
• Coarse and fine aggregates for concrete per IS 383 (Second Revision).

3. Mortar Mix Constants (Clause 2.1, Table 2.4)

IS 10067 Key Notes on Material Wastage & Sand Fineness

1. Fineness Modulus (FM) of Aggregates (Clause 2.2.2)

• Fine Aggregate FM:
  • Leaner mixes: 1.26 (fine sand)
  • Richer mixes: 2.87 (coarse sand)
• Coarse Aggregate FM:
  • Leaner mixes: 6.9
  • Richer mixes: 6.5
• Aggregate grading per IS 383-1970.

2. Material Constants for Concrete Mixes (Table 2.4, Clause 2.2)

Note: For crushed aggregates, increase constants by **5% (

IS 10067 (1982) provides material constants essential for design and construction, covering:

Key Material Constants (Typical values, refer to IS 10067 for detailed tables):

Important Specs:

• Density: Used for self-weight calculations.
• Modulus of Elasticity (E): For deformation and stress analysis.
• Poisson's Ratio (ν): For multi-axial stress states.
• Thermal Expansion: For temperature effect considerations.

Usage:

• Refer to IS 10067 tables for specific material grades and conditions.
• Use constants in structural analysis, load calculations, and detailing.

flowchart LR
    A[Material Constants] --> B[Density]
    A --> C[Modulus of Elasticity]
    A --> D[Poisson's Ratio]
    A --> E[Thermal Expansion]

For precise design, always cross-check with updated IS 10067 tables.