Pull-Off Adhesion of Bonding Layer on Concrete
(Bonding Agent Adhesion — BS EN 1542)

Measurement of the tensile bond strength of bonding agents, epoxy bonding layers and polymer overlays on concrete substrates — verifying bond integrity for repair, overlay and strengthening applications.

Overview

What is the Pull-Off Adhesion of Bonding Layer on Concrete?

The Pull-Off Adhesion of Bonding Layer on Concrete test measures the tensile bond between a bonding agent or repair overlay and the concrete substrate. This is critical for structural repair works where the bond between new and old concrete must exceed the tensile strength of the concrete substrate to ensure repair integrity.

Conducted as per BS EN 1542 and ASTM C1583, this test is mandatory for structural repair overlays, epoxy injection effectiveness, bonding agent performance and waterproofing membrane adhesion verification. Global Lab conducts both in-situ and laboratory pull-off tests on bonding layer systems.

Structural Repair Acceptance

Mandatory acceptance test for structural repair and overlay systems.

ASTM C1583 & BS EN 1542

Both standards available per project specification requirements.

Failure Mode Classification

Concrete fracture vs interface failure vs overlay cohesive failure — all reported.

All Bonding Systems

Epoxy, cementitious slurry, SBR bonding agents and overlay systems.

NABL Certified Reports

All results on NABL-accredited letterhead per BS EN 1542.

Pre & Post-Repair Testing

Before-and-after testing quantifies bond improvement from substrate preparation.

Test in Action

Pull-Off Adhesion of Bonding Layer on Concrete — Site Images

Bonding Layer Applied to Prepared Substrate

Core Drilled Through Overlay to Concrete

Pull-Off Tester on Repair Overlay Bond Test

Test Procedure

How the Pull-Off Adhesion of Bonding Layer on Concrete is Conducted

1

Surface Preparation Assessment

Substrate preparation (shot blasting, scarifying) assessed and documented.
2

Bonding Layer Application

Bonding agent applied per specification. Cured for specified period.
3

Dolly Bonding & Core Drilling

50mm dolly bonded to bonding layer surface. Core drilled through overlay to concrete.
4

Pull-Off Test

Tensile load applied at 0.05 N/mm²/s per BS EN 1542.
5

Result & Failure Mode Report

Bond strength and failure mode reported vs specification minimum (≥1.5 N/mm² for structural repair). NABL report within 24 hours.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
BS EN 1542	Products and Systems for Protection and Repair of Concrete — Measurement of Bond Strength by Pull-Off	Bond Strength	British Standard
ASTM C1583	Standard Test Method for Tensile Strength of Concrete Surfaces and the Bond Strength	Bond Test	ASTM
IS 456:2000	Plain and Reinforced Concrete — Code of Practice	Structural Repair	Indian Standard
EN 1504	Products and Systems for Protection and Repair of Concrete Structures	Repair Standard	European Standard

Applications

Where is the CAPO Test Used?

Structural repair overlay bond acceptance on bridges and car parks

Epoxy bonding layer effectiveness verification for new-to-old concrete repair

Waterproofing membrane adhesion testing on concrete surfaces

Shotcrete bond strength acceptance on tunnel linings

Bonded overlay acceptance on industrial floors after diamond grinding

Epoxy injection effectiveness verification after crack injection repair

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsLegally valid bond strength certificates accepted by all structural engineers.

Two Standards AvailableBS EN 1542 and ASTM C1583 — both test methods available.

EN 1504 Repair AcceptanceTest conducted per EN 1504-2 requirements for structural repair products.

Pan-India CoverageField teams across all 7 lab locations.

Fast 24-Hour ReportOn-site results; NABL report within 24 hours.

Failure Mode RecommendationsWritten substrate preparation guidance if interface failure detected.

Pull-Off Adhesion of Bonding Layer on Concrete(Bonding Agent Adhesion — BS EN 1542)