NABL Accredited · Advance NDT Service
Cut and Pull-Out
(CAPO) Test
In-situ measurement of concrete compressive strength through bond strength testing — delivering accurate, semi-destructive results directly on-site without removing core samples.
ASTM C 900
Standard
±5% To ±8%
Accuracy
24hr
Report TAT
NABL
Accredited
NABL Accredited Lab · ISO/IEC 17025:2017
Digital Reports via Autovity QLMS
Pan-India · 7 Lab Locations
Est. 2009 · 20,000+ Projects
Overview
What is the Cut and Pull-Out (CAPO) Test?
The Cut and Pull-Out (CAPO) Test is an advanced in-situ semi-destructive testing method used to determine the compressive strength of existing concrete structures without extracting concrete cores. A small disc is inserted into a shallow groove cut into the concrete surface, and a hydraulic jack applies a pullout force.
CAPO measures pull-out force and estimates insitu compressive strength through correlation. Global Lab conducts CAPO tests as per IS 516, ASTM C 900, and other applicable standards using NABL-calibrated equipment.
Semi-Destructive
Minimal surface preparation. Structure integrity is preserved throughout testing.
Fast Turnaround
On-site results within hours. Digital reports dispatched within 24 hours.
NABL Certified
All test reports carry NABL accreditation seal valid for legal and contractual use.
Pan-India Coverage
Site engineers deployed across 7 lab locations and all major project sites.
Digital Reporting
Access reports anytime via Autovity QLMS client dashboard — zero paperwork.
High Accuracy
Results correlated to cube compressive strength with ±2% precision range.
Test Procedure
How the CAPO Test is Conducted
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1Surface PreparationA shallow groove (approx. 25mm deep) is cut into the concrete surface using a diamond-tipped cutting tool. The surface is cleaned of dust and debris.
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2Insert Disc PlacementA specially designed steel insert disc is placed into the groove. A thin rod connects the disc to the pullout apparatus above the surface.
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3Hydraulic Pullout Force ApplicationA hydraulic jack applies a steady, controlled pullout force to the insert disc via the reaction ring resting on the concrete surface.
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4Failure Load RecordingThe maximum force at which the concrete cone is extracted is recorded. A digital load indicator provides real-time readings with data logging.
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5Strength Calculation & ReportingThe pullout force is correlated to cube compressive strength using established calibration curves. NABL-accredited reports are issued via Autovity QLMS.
Standards & Specifications
Applicable Test Standards
| Standard | Title | Scope | Type |
|---|---|---|---|
| IS 516 | Methods of Tests for Strength of Concrete | Compressive, Flexural, Tensile Strength | Indian Standard |
| ASTM C 900 | Standard Test Method for Pullout Strength of Hardened Concrete | In-situ Pullout Strength | ASTM |
| BS 1881 | Testing Concrete — Recommendations for Surface Hardness Testing | Surface Strength Assessment | British Standard |
| EN 12504-3 | Testing Concrete in Structures — Determination of Pull-out Force | Structural Concrete Testing | European Standard |
Applications
Where is the CAPO Test Used?
Assessment of existing RCC buildings and structures
Quality control during construction — slab, column, beam
Bridge, tunnel, and infrastructure health monitoring
Pre-stressing works — verifying concrete maturity
Dispute resolution and forensic structural investigation
Nuclear plants, metro projects, high-rise construction
Why Choose Global Lab
Our Advantages
NABL Accredited ReportsLegally valid certificates accepted by all government bodies, contractors and consultants.
Experienced Site EngineersDedicated field team with 15+ years of NDT experience across 20,000+ projects.
Autovity Digital PlatformReal-time report access, sample tracking, and TAT monitoring 24/7 from any device.
Calibrated EquipmentAll instruments NABL-calibrated with valid certificates ensuring measurement accuracy.
Pan-India Presence7 lab locations — Mumbai, Navi Mumbai, Kolkata, Guwahati, Bhubaneswar, Surat, Ahmedabad.
Competitive PricingTransparent pricing with no hidden charges. Volume discounts for large project contracts.