Track Ballast Testing
(Railway Ballast — IRS GE/1)

Complete mechanical and physical testing of railway track ballast as per IRS GE/1 — covering aggregate impact value, abrasion, crushing value, particle size distribution, flakiness and elongation for track acceptance.

Overview

What is the Track Ballast Testing?

Track Ballast is the crushed stone aggregate placed on railway track beds to distribute load from sleepers to subgrade, provide drainage, resist lateral and longitudinal movement of track, and absorb vibration. Ballast quality is governed by strict physical and mechanical requirements per IRS GE/1 (Indian Railways Standard).

At Global Lab, track ballast testing covers the complete IRS GE/1 test suite including Aggregate Impact Value (AIV ≤20%), Los Angeles Abrasion Value (LAA ≤30%), Aggregate Crushing Value (ACV ≤25%), particle size distribution (40–65mm grading), flakiness index (≤25%), elongation index (≤25%), water absorption and specific gravity — mandatory tests for all railway ballast procurement in India.

Complete IRS GE/1 Suite

All mandatory tests per Indian Railways ballast specification.

Impact Value (AIV ≤20%)

Resistance to impact — critical for high-speed railway track.

LA Abrasion (≤30%)

Resistance to degradation under repeated traffic loading.

40–65mm Grading Check

Particle size distribution verified against IRS GE/1 grading envelope.

NABL Certified Reports

All results on NABL-accredited letterhead for Railways acceptance.

Source Approval Testing

Comprehensive quarry source approval testing for Railway procurement.

Test in Action

Track Ballast Testing — Site Images

Track Ballast Sieve Analysis

Aggregate Impact Value Test Machine

Flakiness Gauge on Ballast Sample

Test Procedure

How the Track Ballast Testing is Conducted

1

Sample Collection

Ballast sample collected per IRS GE/1 sampling procedure — minimum 500kg field sample reduced to test portions.
2

Particle Size Distribution

Sieve analysis using 65, 50, 40, 25, 20mm sieves. Grading plotted against IRS GE/1 envelope.
3

Shape Tests

Flakiness index (IS 2386 Part 1) and elongation index tested on 40–65mm fraction.
4

Mechanical Tests

AIV (IS 2386 Part 4), ACV (IS 2386 Part 4), LA Abrasion (IS 2386 Part 4) conducted.
5

Physical Tests & Report

Specific gravity and water absorption per IS 2386 Part 3. All results vs IRS GE/1 limits. NABL report within 7 days.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
IRS GE/1	Indian Railways Standard Specification for Track Ballast	Railway Ballast	Indian Railways
IS 2386	Methods of Test for Aggregates for Concrete (Parts 1–8)	Aggregate Testing	Indian Standard
IS 383:2016	Coarse and Fine Aggregate for Concrete — Specification	Aggregate Reference	Indian Standard
RDSO Guidelines	Research Design and Standards Organisation — Track Ballast	RDSO	Indian Railways

Applications

Where is the CAPO Test Used?

Railway track ballast source approval for Indian Railways procurement

Quality acceptance testing at ballast depot before track laying

High-speed railway corridor ballast quality verification

Metro rail track ballast acceptance testing

Ballast quality monitoring during large-scale track renewal projects

Comparison testing of ballast from multiple quarry sources

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsRailway-accepted NABL certificates for IRS GE/1 compliance.

Complete IRS GE/1 SuiteAll mandatory tests in a single submission and comprehensive report.

Railway Project ExperienceExtensive ballast testing experience for Indian Railways, Metro and DFCC.

Pan-India CoverageTesting at all 7 NABL lab locations for railway projects nationwide.

Fast 7-Day ReportComplete IRS GE/1 test suite reported within 7 days.

Source Approval ServiceFull quarry source approval testing including petrographic examination.

Track Ballast Testing(Railway Ballast — IRS GE/1)