NABL Accredited · Foundation Testing Service
Control Modulus Column
(Rigid Inclusion Load Test)
Static load test on Control Modulus Columns — rigid concrete inclusions for ground improvement — verifying stiffness and load-settlement performance under design loads.
IS 15284
Standard
±5%
Accuracy
7 Days
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 Control Modulus Column (CMC) Test?
Control Modulus Columns (CMC) are stiff concrete inclusions installed by displacement auger into soft ground. Unlike stone columns, CMCs transfer load primarily through tip resistance and skin friction to a competent stratum. Load tests verify that installed CMCs achieve specified stiffness and settlement performance.
Conducted as per IS 15284, CMC load tests verify that columns achieve specified stiffness (load/settlement ratio) and maximum settlement at design load. Global Lab conducts CMC load tests using calibrated kentledge systems with precision LVDT settlement measurement.
CMC Stiffness Verification
Load/settlement ratio confirmed against design stiffness requirement.
Settlement Verification
Actual settlement measured against maximum allowable per design.
Tip Resistance Assessment
Load transfer to competent stratum verified through settlement behaviour.
Group vs Single Column
Both single CMC and group (composite footing) load tests conducted.
NABL Certified Reports
All results on NABL-accredited letterhead per IS 15284.
Ground Improvement QA
Essential acceptance test for CMC ground improvement schemes.
Test in Action
Control Modulus Column (CMC) Test — Site Images
CMC Head Preparation and Cap Placement
Kentledge Reaction System Over CMC
Load-Settlement Curve Plotted and Accepted
Test Procedure
How the Control Modulus Column (CMC) Test is Conducted
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1CMC Head PreparationSelected CMC heads trimmed and levelled. Concrete cap or plate placed.
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2Reaction System SetupKentledge deadweight reaction system assembled over the test CMC.
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3InstrumentationLoad cell, hydraulic jack, LVDTs and dial gauges installed per test protocol.
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4Load ApplicationLoad applied in increments to 1.5× or 2× design load. Settlement recorded at each stage.
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5Analysis & AcceptanceLoad-settlement curve plotted. Stiffness and settlement vs acceptance criteria. NABL report within 7 days.
Standards & Specifications
Applicable Test Standards
| Standard | Title | Scope | Type |
|---|---|---|---|
| IS 15284 | Design and Construction for Ground Improvement — Guidelines | Ground Improvement | Indian Standard |
| IS 1888 | Method of Load Test on Soils | Load Test Reference | Indian Standard |
| ASIRI Guidelines | Recommendations for the Design, Construction and Control of Rigid Inclusion Ground Improvement | CMC Design | French Standard |
| ASTM D1196 | Standard Test Method for Nonrepetitive Static Plate Load Tests | Load Test | ASTM |
Applications
Where is the CAPO Test Used?
CMC ground improvement verification for reclaimed land and soft soil sites
Industrial warehouse and logistics park foundation ground improvement
Highway embankment foundation on soft compressible soil
Airport apron and taxiway CMC ground improvement acceptance
Tank farm and silo foundations on soft marine clay
Urban infrastructure where pile driving is not feasible
Why Choose Global Lab
Our Advantages
NABL Accredited ReportsLegally valid IS 15284 compliance certificates for ground improvement acceptance.
CMC ExpertiseExperienced in CMC testing for industrial, logistics and infrastructure projects.
Combined Ground PackageCMC + Stone column + Plate load tests offered as a complete ground improvement QA.
Autovity Digital ReportsLoad-settlement data and acceptance status accessible digitally.
Pan-India CoverageTesting teams across all 7 lab locations.
Fast 7-Day ReportComplete NABL report within 7 days of test.