Grout Testing - Global Lab

Grout Testing
(Tile Grout — BS EN 13888)

Complete mechanical and physical testing of cementitious and epoxy tile grouts — verifying compressive strength, flexural strength, abrasion resistance, water absorption and colour stability per BS EN 13888.

Overview

What is the Grout Testing?

Tile Grout fills the joints between ceramic, porcelain, natural stone and glass mosaic tiles — providing structural continuity, waterproofing and aesthetics. BS EN 13888 classifies grouts as CG1 (normal), CG2 (improved), RG (reactive epoxy) based on compressive strength, abrasion resistance, water absorption and shrinkage performance.

At Global Lab, grout testing is conducted as per BS EN 13888 covering compressive strength, flexural strength, abrasion resistance (Taber), water absorption (30-minute and 240-minute), shrinkage, colour stability after UV exposure and efflorescence — providing complete CG1/CG2/RG classification for product approval and CE marking.

CG1/CG2/RG Classification

Full BS EN 13888 class designation from comprehensive test suite.

Compressive & Flexural Strength

Mortar prism strength tested per BS EN 13888 requirements.

Abrasion Resistance

Taber abrasion test — critical for floor grout durability under foot traffic.

Water Absorption

30-minute and 240-minute absorption — W category for wet area grouts.

NABL Certified Reports

All results on NABL-accredited letterhead per BS EN 13888.

Colour Stability

UV exposure colour fastness test for premium coloured grout products.

Test in Action

Grout Testing — Site Images

Grout Prism Casting for Strength Test

Taber Abrasion Test on Cured Grout Slab

30-Minute Water Absorption Measurement

Test Procedure

How the Grout Testing is Conducted

1

Sample Preparation

Grout mixed at manufacturer's specified water/powder ratio. Consistency verified.
2

Specimen Casting

Prisms (40×40×160mm) and flat slabs cast per BS EN 13888.
3

Strength Testing

Compressive and flexural strength at 28 days per BS EN 196-1 method.
4

Abrasion & Water Absorption

Taber abrasion test on cured grout slab. 30-min and 240-min water absorption measured.
5

Classification & Report

CG1/CG2/RG class assigned from results. NABL report within 28 days.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
BS EN 13888	Grout for Tiles — Requirements, Evaluation of Conformity, Classification and Designation	Grout Standard	British Standard
BS EN 196-1	Methods of Testing Cement — Determination of Strength	Strength Testing	British Standard
IS 15477	Adhesives for Ceramic Tiles — Specification	Tile Products Reference	Indian Standard
ASTM C109	Standard Test Method for Compressive Strength of Hydraulic Cement Mortars	Mortar Strength	ASTM

Applications

Where is the CAPO Test Used?

Tile grout CE marking product approval for manufacturers

Swimming pool and wet area grout performance verification

Exterior facade grout weathering and UV resistance assessment

Epoxy grout (RG class) characterisation for chemical plant applications

Comparative testing of competing grout products for specification

Floor grout abrasion resistance verification for high-traffic commercial areas

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsLegally valid BS EN 13888 class certificates for CE marking.

Full Classification SuiteCG1/CG2/RG designation from compressive strength, abrasion and absorption.

Colour Stability TestingUV colour fastness for premium decorative coloured grout products.

Combined Tile System TestingGrout + Tile adhesive + Pull-off adhesion as a complete tile system audit.

Pan-India CoverageTesting at all 7 NABL-accredited lab locations.

28-Day ReportComplete BS EN 13888 test suite within 28 days.

Grout Testing(Tile Grout — BS EN 13888)