Ultrafine GGBS
(Ultra-Fine Ground Granulated Blast Furnace Slag)

Complete physical and chemical testing of ultrafine ground granulated blast furnace slag (UGGBS) — verifying Blaine fineness, activity index, density and chemical composition for high-performance concrete applications.

Overview

What is the Ultrafine GGBS (UGGBS) Testing?

Ultrafine GGBS (UGGBS) is a premium SCM with Blaine fineness exceeding 600 m²/kg — significantly finer than standard GGBS (400–450 m²/kg). Its ultra-fine particle size provides superior pore-filling, increased pozzolanic reactivity and dramatically improved impermeability in concrete — making it the preferred SCM for marine, nuclear and high-durability applications.

At Global Lab, UGGBS testing is conducted as per IS 16714 and BS EN 15167, covering Blaine fineness (≥600 m²/kg), glass content, activity index at 7 and 28 days, soundness, and chemical analysis (CaO, SiO₂, Al₂O₃, MgO, S, Cl, TiO₂). These parameters directly govern UGGBS performance in high-performance and ultra-high-performance concrete.

Ultra-High Blaine Fineness

≥600 m²/kg Blaine confirmed — key differentiator from standard GGBS.

Activity Index at 7 & 28 Days

Hydraulic reactivity confirmed by mortar strength activity index testing.

Glass Content Verification

≥85% glass content per IS 16714 for maximum reactivity.

Chemical Analysis

CaO, SiO₂, Al₂O₃, MgO, S, Cl and TiO₂ quantified by XRF.

NABL Certified Reports

All results on NABL-accredited letterhead per IS 16714 / BS EN 15167.

Batch Consistency Monitoring

Batch-to-batch quality monitoring for large infrastructure projects.

Test in Action

Ultrafine GGBS (UGGBS) Testing — Site Images

Blaine Fineness Test on UGGBS Sample

Activity Index Mortar Cube Casting

XRF Chemical Analysis of UGGBS

Test Procedure

How the Ultrafine GGBS (UGGBS) Testing is Conducted

1

Sample Collection

UGGBS sample collected from bulk bag, silo or package per IS 16714 sampling procedure.
2

Physical Tests

Blaine fineness (air permeability), specific gravity, moisture content and soundness tested.
3

Activity Index

Mortar cubes with 50% UGGBS + 50% OPC vs 100% OPC control. Activity index at 7 and 28 days.
4

Glass Content

X-ray diffraction or selective dissolution method to determine amorphous glass content.
5

Chemical Analysis & Report

XRF chemical analysis. IS 16714 compliance checked. NABL report within 35 days.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
IS 16714	Ground Granulated Blast Furnace Slag for use in Concrete, Mortar and Grout — Specification	GGBS Standard	Indian Standard
BS EN 15167	Ground Granulated Blast Furnace Slag for Use in Concrete, Mortar and Grout	GGBS Standard	British Standard
ASTM C989	Standard Specification for Slag Cement for Use in Concrete and Mortars	GGBS	ASTM
IS 1727	Methods of Test for Pozzolanic Materials	Pozzolan Testing	Indian Standard

Applications

Where is the CAPO Test Used?

Marine and offshore concrete — ultra-low chloride permeability specification

Nuclear containment structure concrete with strict impermeability requirements

Bridge deck and pier concrete in aggressive chloride environments

UHPC (Ultra-High Performance Concrete) mix designs for pedestrian bridges

Precast marine pile segments for port and harbour construction

High-rise building basement and foundation concrete in coastal cities

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsLegally valid IS 16714 certificates for UGGBS procurement and QC.

Ultra-Fine Blaine VerificationConfirms ≥600 m²/kg — key quality parameter for premium performance.

HPC Mix Design IntegrationUGGBS data directly used in our HPC and marine concrete mix designs.

Autovity Digital ReportsAccess all UGGBS test data digitally.

Multiple Source ComparisonComparative testing from different UGGBS producers.

Combined SCM PackageUGGBS + Silica Fume + Fly Ash testing offered together for full SCM suite.

Ultrafine GGBS(Ultra-Fine Ground Granulated Blast Furnace Slag)