Construction Diagnostic Centre We Qualify Structures
Pune, Maharashtra
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.
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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.
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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
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Used in combination with Moisture meters to identify the temperature gradient and spot temperatures from a long distance by just sighting the object.
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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)