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 Investigation

We 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 Council (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)