Pune, Maharashtra

Construction Diagnostic Centre

We Qualify Structures

About Us We are a consultancy & a construction material testing

laboratory offering Non Destructive/ Material Testing (NDT), Quality Control, & Repair / Rehabilitation Consultancy services.

An offshoot of a parent company viz ‘Ranade Consultants’, a firm established in 1960, CDC draws on its vast and rich experience in Structural / RCC / Project Management & Architectural consultancy.

We are the ONLY firm offering all civil engineering-related Consultancy & Testing services under one roof.

We enjoys an Accreditation from NABL (ISO – 17025) for Non Destructive Testing and Mechanical Testing of Building Materials.

Services Offered Our Head Office is located in the heart of Pune

city, with a Branch Office in Surat, Gujrat. We believes in continuous improvement through

on-going research and practice. we provides services for the evaluation and

condition assessment of existing structures, including application of non-destructive, in-situ, and load-testing methods for measuring existing states of stress, material properties, structural behaviour characteristics and material uniformity.

Projects Completed

Airports, Dams, Tunnels, Bridges, Concrete Roads,

Jetties, Wind Mills, Earthquake / Blast / Fire-damaged

Structures, Commercial / Mass Housing Projects,

Educational Complexes, Cement ,Soya bean, Chemical

Sugar, Thermal Power- Plants, Elevated Water Tanks,

Reservoirs, Bunkers, Silos, Effluent / Water Treatment

Plants and so on; in India as well as abroad.

Our Services

Non Destructive Testing Construction Material Repair & Rehabilitation Heritage Structures Failure Investigation CIDC-Approved Retrofitting Corporate Training Concrete Quality Control Structural Audit And Structural Stability Certification

Load Test IS – 456 – 2000 recommends Load testing of

flexural members to be carried out In case the core test results do not satisfy the requirements.

Many a times Load test is carried out on building & Bridge components when –

The strength of concrete is below the acceptable norms

Structural Design data is not available.

Load carrying capacity of the flexural member needs to be assessed.

The members is to be subjected to a higher loads

Moisture Measurement

Moisture is known to be one of the main

sources causing deterioration of masonry

and timber structures.

To identify the source of leakages and

dampness moisture meters are very helpful.

If the concrete, masonry, timber structures

are found to be wet, then appropriate repairs

can be carried out to avoid further decay

deterioration of the material and structure as

a whole.

Ultrasonic Pulse Velocity Test Construction Diagnostic Centre has a very wide

range of UPV machines with different frequency

& different sizes probes, capable of scanning

concrete up to 10 m wide.

This is one of the most commonly used

methods, in which the ultrasonic pulses are

transmitted through the concrete.

In solids, the particles can oscillate along the

direction of sound propagation as longitudinal

waves, or the oscillations can be perpendicular

to the direction of sound waves as transverse

waves.

Half Cell Potentiometer And Resistivity Meter

The instrument measures the potential and the

electrical resistance between the reinforcement

and the surface to evaluate the corrosion activity

as well as the actual condition of the cover layer

during testing.

The electrical activity of the steel reinforcement

and the concrete leads them to be considered as

one half of weak battery cell with the steel acting

as one electrode and the concrete as the

electrolyte.

The name half-cell surveying derives from the fact

that the one half of the battery cell is be the steel

reinforcing bar and the surrounding concrete.

Bore Scope Survey / Endoscopy

Endoscopy surveys provide a fast, cost effective

means of identifying problematic / in-accessible areas

where bear minimum destruction is allowed for

inspection such as – Concrete pipes, Water Pipes Storm pipes Sewer Lines Culvert Cavity walls Air ducts, Vents Ceiling, roof and floor voids Water tanks Concrete or Masonry structures with large voids,

honeycombing etc..

Underwater InvestigationWe carry out underwater inspection of structures like Dams Bridges Water Tanks Effluent & Water Treatment Plants Jetty

Underwater Structures

Underwater camera

Underwater Structures

Corrosion of Underwater Structures captured

by Camera

Inspection of Jetty & Bridge Foundations by

Underwater Camera

Non Destructive Testing Construction Diagnostic Centre has a full range of

NDT instruments and conduct tests such as

Rebound Hammer Test – To assess the quality and strength of site concrete

Ultrasonic Pulse Velocity Test - To assess the quality and strength of site concrete

Concrete Core Extraction – To assess the In-situ strength of concrete, Making holes in RCC for Plumbing / Electrical purpose

Rebar Location & Cover-meter – Locating Reinforcement in the concrete

Half-cell potential Test & Resistivity Test - for Corrosion Mapping of reinforcement

Pile Integrity Test – For assessing the Integrity, Continuity & Depth of pile

Rebound Hammer Test

This is the most common method adopted for

checking strength of concrete since 1940.

The test is based on the principle that the rebound

of an elastic mass depends on the hardness of

the surface against which mass strikes.

The plunger of hammer is pressed strongly and

steadily against the concrete surface at right

angles to its surface, until the spring loaded mass

is triggered from the locked position.

The distance traveled by the mass as a

percentage is defined as rebound number.

Core Test And Core Cutting

This is one of the very reliable tests adopted for

checking the compressive strength of the ‘In situ

concrete”.

Other physical properties such as density, water

absorption can also be measured from the core

concrete.

In addition chemical properties of concrete

specimen for its cement content, carbonation depth,

chloride and sulphate content may be measured.

Rebar Locator And Bar Size The reinforcement bar is detected by

magnetising it and inducing a circulating “eddy current” in it.

After the end of the pulse, the eddy current dies away, creating a weaker magnetic field as an echo of the initial pulse.

The strength of the induced field is measured by a search head as it dies away and this signal is processed to give the depth measurement.

The eddy current echo is determined by the depth of the bar, the size of bar and the orientation of the bar.

This detection of location of reinforcement is required as a pre process for core cutting.

Pile Integrity Test (Pulse Echo Method)

It has been established that cast in situ piles in majority of the cases fail because of defective pile shaft necking, discontinuity of concrete, intrusion of foreign matter and improper toe formation due to contamination of concrete at base with soil particles,

washing of concrete due to high water current, adoption of improper construction method, poor quality control on concreting etc.

Cracks developed while handling of precast piles can also be a cause of failure.

If pile integrity can be assessed before completion of pile caps, then this will go a long way towards certification of pile integrity

Vibration Measurement Structural vibration in buildings can be detected by the

occupants and can affect them in many ways: Their quality of life can be reduced as also can their working

efficiency. Ground borne vibration from sources such as blasting,

piling, machinery or road/rail traffic can be a source of concern for occupants of buildings in the vicinity.

This concern can lead to a need to assess the effect of the imposed vibration on the building structure to ascertain whether damage could occur.

It is increasingly recognized that buildings must sustain vibrations, and recognition of this is needed

both in design for structural integrity, serviceability and environmental acceptability, and in the preservation of historic buildings.

Measurement of vibration in a building is carried out for a variety of purposes:

Ultrasonic Thickness Gauge Using the Ultrasonic thickness Gauge we can

find out the precise thickness of all such steel metal structures, components.

Ultrasonic Thickness Gauge a very useful tool in the structural audit / survey.

In most of the Industries, especially in Chemical factories corrosion is a very serious issue for the structural stability of the steel structures, M S Chimney, Stacks, Gantry girders, Pipe racks, Pipelines etc.

Using the Ultrasonic thickness Gauge we can find out the precise thickness of all such steel metal structures, components.

Infrared Thermometers

Used in combination with Moisture

meters to identify the temperature

gradient and spot temperatures

from a long distance by just

sighting the object.

a very useful tool in structural

audits of the buildings, water

structures, chimney etc.

Construction Material Laboratory Testing

Construction Diagnostic Centre laboratory is well equipped to test for

Cement, Concrete, Steel, Aggregates, Bricks, Concrete blocks, Paving Blocks, Construction Chemicals, accelerated curing of concrete etc.

The lab offers state-of-the-art Mix Designs for Normal concrete, Pumpable concrete, High strength concrete, High early strength concrete, High performance concrete, Self-compacting concrete etc.

The Construction Diagnostic Centre lab has advanced and modern test set-up such as, fully computerized Universal Testing Machine and Compression Testing Machine, Concrete Pan Mixer, Temperature Controlled Curing Tanks along with all other test equipments.

Repair And Rehabilitation Consultancy

In recent times, a large number of structures are observed to be in a distressed condition.

The structures may require repair / rehabilitation due to –

Poor quality concrete / workmanship Construction Deficiencies Design Deficiencies Severe Exposure Condition Corrosion Aging Damage due to Earthquake , Fire, Blast,

Vibrations etc. Settlement , Foundation problems. 

Heritage Structures Conservation Consultancy

At CDC we have the core expertise in assessment of the Heritage buildings. We have the most advanced  Non Derstructive Testing tools , including consultancy services for structural conservation, strengthening & Retrofitting.

We offered such services to following Heritage Structures / Buildings –

1)    Vishrambag wada – Built in 1800 - 1806 ( 205 years old ) – Ground + 2 Upper floor – Composite structure built in load bearing Brick / Stone masonry  walls and Timber Column – Beam frame. The Wada was built by Bajirao II

2)    Nana wada – ( 250 years old ) – Ground + 1 Upper floor – Composite structure built in load bearing Brick masonry walls and Timber Column – Beam frame. The Wada was built by Nana Phadnavis; who after the assassination of Peshwa Narayanrao in 1773 managed the affairs of state

Failure Investigation / Forensic Engineering Consultancy

At CDC we have a professionally trained staff having expertise in the failure investigation & Forensic Engineering.

We have carried out various failure investigations & Forensic Engineering for number of  projects like –

RCC Silo Collapse Full or Part Collapse of  Buildings / Structures Ground Water Reservoirs Overhead Water Tanks Conveyor Belt supporting steel structures Fire Damaged Buildings

Concrete Quality Control And Audit

We have developed a unique Quality Control & Auditing Scheme for RCC structures. 

We offer a Total Quality Solution for concreting activity, which includes Testing of all building materials,

Monitoring concrete quality with NDT, Orientation Lecture for site engineers and  tradesmen,  quality control and audit of concreting activity.

CDC is known in construction industry for “No compromise on Quality”

Structural Audit And Structural Stability Certification

According to Government regulations, All factories and residential societies are

expected to undergo assessment and obtain a Structural Stability Certificate from a chartered civil engineer, every 5 years. 

We are the competent authority to provide such certification. 

We offer services including detailed inspection, assessing the strengths & weakness of the structure, conducting NDT, preparing repair / rehabilitation scheme, monitoring repair work and issuing Structural Stability Certificate.

CIDC Approved Retrofitting Clinic

Our laboratory is an approved “Retrofitting

Clinic” of

Construction Industry Development Counci

l

(CIDC – Established by Planning

Commission – Government of India).

Corporate Training For Construction Industry

“CDC” has drafted short lecture / workshops

series for various Senior Engineers, Site

engineers, Archiects and Supervisors

working in construction industry

Contact Us

Construction Diagnostic Centre Contact Person: Mr. Ravi  Ranade Mobile No: 9422007479 Phone:+91-20-25432643 Visit: http://structural-audits.com Address:“Kanchan Bhavan”, 5, Shilavihar

Colony. City: Pune- 411038 State:Maharashtra (India)