Method of Test for Materials for Use in the Preparation of Magnesium Oxychloride Flooring Compositions
1982 Edition

Scope & Overview of IS 10132

Scope (Clause 1.1)

• Establishes testing techniques for magnesite-based material evaluation.
• Encompasses properties including carbon dioxide concentration, fineness, setting duration, flexural strength, linear dimensional change, bulk density, resin and moisture content, hardness, and compressive strength.

Principal Test Attributes & Clause Index

Standard Units (SI Units)

Illustrative Test: Consistency Determination (Clause 3.2)

• Place test specimen beneath plunger.
• Lower plunger gently and release, allowing it to penetrate specimen.
• Prepare trial mixes with varied solution percentages to determine normal consistency.
• Solution percentage expressed relative to dry calcined magnesite mass.

Unit Definition for Force

[ 1, \text{N} = 1, \text{kg} \cdot \text{m/s}^2 ]

This section summarizes the scope, main testing clauses, units, and an example test method as outlined in IS 10132.

IS 10132: Essential Apparatus and Materials

Equipment (Clauses 2.2 & 7.2.1)

• Consistency Test Arrangement (Fig.1):
  • Mold containing test block placed on a plate.
  • Rod fitted with plunger lowered carefully then released to penetrate the test block.
• Flow Test Arrangement (Fig.3):
  • Funnel (F) with a 3.35 mm IS Sieve (S).
  • Cylindrical measuring container (M):
    • Volume: 1 litre
    • Inner diameter: 100 mm
    • Internal height: 127 mm
  • Wooden spatula.

Consistency Determination Method (Clause 3.2)

• Prepare trial mixes with varying solution percentages.
• Record solution quantity as a percentage of the dry calcined magnesite weight.
• Normal consistency corresponds to the solution percentage where the plunger sinks as specified.

Selected SI Units & Definitions

Diagram: Consistency Test Setup

flowchart TB
    A[Test Block in Mold] --> B[Plate]
    B --> C[Rod with Plunger]
    C --> D[Lower Slowly and Release]
    D --> E[Plunger Penetrates Test Block]

This configuration and methodology ensure consistent measurement of magnesite mix consistency according to IS 10132.

IS 10132: Sampling and Sample Preparation Highlights

Sampling (Clause 2.4)

• Collect an adequate quantity of fresh material for testing.

Sample Preparation Steps (Clause 3.4)

1. Sieving Setup:
   • Employ a 150 µm IS sieve with 75 mm effective diameter.
   • Weigh and position sample on the sieve.
2. Sieving in Methylated Spirit:
   • Add methylated spirit (dried over fresh plaster of Paris) until sieve is submerged.
   • Agitate sieve gently up and down for 5 minutes, tapping sides and stirring with a soft brush.
   • Continue washing with methylated spirit until washings become clear.
3. Drying and Weighing:
   • Dry sieve plus contents at 105 ± 2°C for 1 hour.
   • Weigh after drying.
4. Repeat Sieving with 75 µm IS Sieve:
   • Transfer material passing 150 µm sieve to 75 µm sieve.
   • Repeat sieving for 15 minutes.
   • Dry and weigh as before.

Note: Mechanical sieving is permissible if particle breakage is prevented.

Carbon Dioxide Content Test (Clause 2.5.1)

• Weigh approximately 2.5 g sample.
• Add 20-40 ml distilled water in flask D.
• Pass air until CO₂ absorption tubes show stable weight.
• Add 40 ml hydrochloric acid (1:4 dilution), heat to release gases through sulfuric acid bubbler.
• Boil for 2-3 minutes, then pass air for 20 minutes.
• After 30 minutes cooling at room temperature, weigh absorption tubes.
• Weight increase corresponds to CO₂ content.

Sieving Parameters Summary

flowchart TD
    A[Sample Collection] --> B[Weigh Sample]
    B --> C[Sieving with 150 µm IS Sieve]
    C --> D[Sieving with 75 µm IS Sieve]
    D --> E[Drying and Weighing]

IS 10132: Carbon Dioxide Content Measurement

Testing Method (Clause 2.5.1)

• Weigh about 2.5 g of sample; add 20-40 ml distilled water in flask D.
• Seal with stopper fitted with funnel and condenser; pass air until CO₂ absorption tubes stabilize in weight.
• Close stopcock S; replace tubes with pre-weighed CO₂ absorption tubes.
• Add 40 ml hydrochloric acid (1:4 dilution) via funnel C; heat flask to liberate CO₂ gas.
• Channel gases through sulfuric acid bubbler at moderate flow for 30-40 minutes; then boil for 2-3 minutes.
• Remove heating; connect scrubbers A and B; pass air for 20 minutes.
• Cool absorption tubes for 30 minutes; reweigh.
• Weight gain indicates CO₂ content in sample.

Reporting (Clause 2.6)

• Express CO₂ content as percentage of sample weight.

Calculation Formula for CO₂ %:

[ \text{CO}_2 % = \frac{\text{Weight increase of absorption tubes (g)}}{\text{Sample weight (g)}} \times 100 ]

Testing Parameters Overview

flowchart LR
    A[Sample + Water in Flask] --> B[Seal with Stopper & Condenser]
    B --> C[Pass Air Until Tube Weights Stabilize]
    C --> D[Add HCl (1:4) through Funnel]
    D --> E[Heat to Release CO₂ Gas]
    E --> F[Gas Passes through Sulfuric Acid Bubbler]
    F --> G[Boil for 2-3 Minutes]
    G --> H[Pass Air Again for 20 Minutes]
    H --> I[Cool Tubes for 30 Minutes]
    I --> J[Weigh Tubes & Calculate CO₂ Content]

This method ensures precise quantification of carbon dioxide in magnesite samples.

Modulus of Rupture Evaluation (IS 10132)

The modulus of rupture (R) quantifies the bending strength of calcined magnesite paste.

Formula (Clause 5.4.1):

[ R = \frac{W \times l}{b \times d^2} ]

Where:

• R = Modulus of rupture (kg/cm²)
• W = Load at failure (kg)
• l = Span length between supports (cm)
• b = Breadth of beam (cm)
• d = Thickness of beam (cm)

Testing Procedure Highlights:

• Test six beams at 7 days (168 ± 2 hours) and 28 days (672 ± 4 hours) after mixing with magnesium chloride solution (Clause 5.3.2).
• Determine final setting time using needle F in Vicat apparatus (Clause 4.5.1).

Typical Beam Dimensions:

• Width (b): 2.5 cm
• Depth (d): 2.5 cm
• Span (l): 28 cm (standard span)

Modulus of Rupture Calculation Summary

flowchart LR
    A[Prepare 6 Beam Specimens] --> B[Mix with MgCl₂ Solution]
    B --> C[Cast Beams with Dimensions b x d x l]
    C --> D[Test at 7 and 28 Days]
    D --> E[Apply Load until Failure]
    E --> F[Record Failure Load W]
    F --> G[Calculate R Using Formula]

This procedure ensures reliable flexural strength assessment as per IS 10132.

IS 10132: Linear Dimensional Change Assessment

Key Aspects and Formulae

• Reference Age: Length change is expressed relative to the length at 24 hours (Clause 6.5.2).

• Linear Change (%) Calculation (Clause 5.4):

[ \text{Linear Change} (%) = \frac{L_t - L_{24}}{L_{24}} \times 100 ]

Where:

• (L_t) = Length at test age (e.g., 7 or 28 days)

• (L_{24}) = Length at 24 hours

• Reporting: Average results of six specimens at 7 and 28 days should be reported (Clause 5.5.1).

Measurement Techniques (Clause 6.5.3)

• Sensitivity must detect changes as small as 0.025 mm (1/40 mm).
• Recommended devices:
  • Mechanical length comparator
  • Dial gauge length comparator

Linear Change Testing Summary

flowchart LR
    A[Measure Length at 24 hrs (L₍₂₄₎)] --> B[Measure Length at Test Age (Lₜ)]
    B --> C[Calculate Linear Change Percentage]
    C --> D[Report Average of Six Specimens at 7 & 28 Days]

This protocol guarantees accurate monitoring of dimensional changes in magnesite mixes.

IS 10132: Bulk Density Measurement for Calcined Magnesite

Important Details:

• Definition (Clause 7.1): Bulk density (c1) represents mass per volume unit of calcined magnesite, expressed in kg/L.

• Measurement Method (Clause 7.4.1): Bulk density calculated as specimen weight divided by its volume.

• Units:

  • Mass in kilograms (kg)
  • Volume in litres (L) (1 L = 1000 cm³)
  • Bulk density in kg/L

• Dimension Measurement (Clause 6.5): Use measuring microscope to measure distances between reference points 6.5 to 9.5 mm from specimen ends.

Formula:

[ \rho = \frac{W}{V} ]

Where:

• (W) = Weight of sample (kg)
• (V) = Volume of sample (litres)

Typical Experimental Setup (Fig. 3):

• Place specimen in container with known volume.
• Measure weight with balance.
• Determine volume by dimension measurement or fluid displacement.

Additional Considerations:

• Bulk density is critical for mix design and quality control of magnesite refractory materials.
• Ensure specimen is dry and free of voids for precise results.

flowchart LR
    A[Weigh Sample (W)] --> B[Measure Volume (V)]
    B --> C[Calculate Bulk Density (ρ = W/V)]
    C --> D[Express Result in kg/L]

Summary:

• Accurately measure weight and volume.
• Apply formula (\rho = \frac{W}{V}) to obtain bulk density in kg/L.
• Follow IS 10132 Clause 7 for detailed apparatus and methodology.

Resin Content Determination (IS 10132 - Clause 8.2.1.2)

To calculate the resin percentage in fillers (oven-dried basis):

[ \text{Resin Content (%)} = \frac{D - X}{D} \times 100 ]

Where:

• (X) = Weight of residue after resin extraction from a 2 g sample (g)
• (D) = Weight of oven-dried material from the 2 g sample (g)

Procedure Summary:

• Take 2 g of filler sample.
• Extract resin and weigh residue (X).
• Oven dry 2 g sample and weigh (D).
• Calculate resin content using formula.

Notes:

• Resin content is expressed as a percentage of the oven-dried filler.
• This method provides an accurate measure of resin presence in fillers.

Refer to Clauses 7.4.1 and Fig. 3 for apparatus details related to bulk density and moisture content measurements.

flowchart LR
    A[2 g Sample] --> B[Resin Extraction]
    B --> C[Weigh Residue (X g)]
    A --> D[Oven Dry Sample]
    D --> E[Weigh Oven-Dried Sample (D g)]
    C & E --> F[Calculate Resin Content % = ((D - X)/D)*100]

IS 10132: Moisture Content Determination in Fillers

Purpose (Clause 9.1)

• Quantify the moisture percentage in fillers to maintain quality standards.

Method Overview:

• Weigh sample before and after oven drying.
• Calculate moisture content as weight loss upon drying.

Moisture Content Formula (%):

[ \text{Moisture Content} = \frac{W_{\text{wet}} - W_{\text{dry}}}{W_{\text{wet}}} \times 100 ]

Where:

• (W_{\text{wet}}) = Weight of wet filler sample
• (W_{\text{dry}}) = Weight after oven drying

Resin Content Recap (Clause 8.2.1.2)

• Given:
  • (X) = Residue weight after resin extraction from 2 g sample
  • (D) = Oven-dried weight of 2 g sample
• Resin content (%) calculated as:

[ \text{Resin Content} = \frac{D - X}{D} \times 100 ]

Additional Information:

• Oven drying at 105 ± 5 °C until constant mass.
• Rounding as per IS 2:1960.
• Standard consistency and test mix preparation apply for related tests.

flowchart TD
    A[Weigh Wet Sample (W_wet)] --> B[Oven Dry at 105°C]
    B --> C[Weigh Dry Sample (W_dry)]
    C --> D[Calculate Moisture Content]
    D --> E[Apply Formula: ((W_wet - W_dry)/W_wet) * 100]

This procedure assures precise moisture and resin content evaluation in filler materials.

IS 10132: Hardness Evaluation - Specifications and Criteria

• Clause 10.2.3: Hardness is acceptable if the mean diameter difference between tests 10.2.1 and 10.2.2 does not exceed 0.5 mm.

• Testing Approach (Clause 10.2): Hardness of floor finish is assessed by comparison with a reference pattern using abrasion or indentation methods described in 10.2.1 and 10.2.2.

Hardness Evaluation Summary

Notes:

• Mean diameter refers to average size of abrasion/indentation marks.
• Ensuring minimal variation confirms consistent hardness and durability.

For formulas or tabulated data related to compressive strength or other properties, please specify your requirements.

IS 10132: Compressive Strength Assessment of Calcined Magnesite

• Specimen Dimensions: Cubic samples of 70.6 mm edge length (Clause 11.3.1).
• Number of Samples: Six cubes tested after curing (Clause 11.4).
• Testing Method: Use compression testing apparatus to measure failure load (Clause 11.4).
• Strength Calculation:

[ \text{Compressive Strength (kg/cm}^2) = \frac{\text{Failure Load (kg)}}{\text{Cross-sectional Area (cm}^2)} ]

• With cube side length 7.06 cm:

[ \text{Area} = 7.06 \times 7.06 = 49.84 \text{ cm}^2 ]

• Result Reporting: Average compressive strength of all tested cubes (Clause 11.5).

Compressive Strength Test Summary

flowchart TD
    A[Prepare 6 Cubes (70.6 mm)] --> B[Cure and Store as per Clauses 11.3.2-11.3.3]
    B --> C[Perform Compression Test]
    C --> D[Compute Strength = Load / 49.84 cm²]
    D --> E[Average Results of 6 Cubes]
    E --> F[Report Final Compressive Strength]

This ensures consistent and reliable strength evaluation in accordance with IS 10132.

IS 10132: Reporting Results and Data Analysis Overview

1. Numerical Rounding Rules (Clause 1.1)

• Each test specifies rounding guidelines (refer to table):

2. Carbon Dioxide Content Reporting (Clauses 3.2 & 2.6)

• Determine consistency by placing test block under plunger.
• Lower plunger gently and release, allowing it to sink.
• Conduct trial mixes with varied solution percentages to identify normal consistency.
• Report CO₂ content as percentage by weight of dry calcined magnesite.

3. Fineness Reporting (Clause 3.5)

• Weigh residues from sieving procedures.
• Report percentage passing 150 µm and 75 µm IS sieves.

4. Units and Symbols (SI Units)

Reporting Workflow Diagram

flowchart TD
    A[Obtain Test Sample] --> B[Execute Test]
    B --> C{Identify Test Type}
    C -->|Carbon Dioxide| D[Measure CO₂ Percentage]
    C -->|Fineness| E[Weigh Sieved Residues]
    C -->|Setting Time| F[Record Setting Duration]
    D --> G [...]