Non-Destructive Testing

We select the appropriate non-destructive test for your structure based on its suitability and its intended use.

Our objective is to assess existing condition of structure and provide recommendations based on findings.

Ultrasonic Pulse Velocity (UPV) Testing

ULTRASONIC PULSE VELOCITY (UPV) TESTING

Ultrasonic test on concrete is a recognized non-destructive test to assess the homogeneity and integrity of concrete. With this ultrasonic test on concrete, following can be assessed:

  1. Homogeneity or uniformity of concrete in structures, post construction to check for voids, honeycombs etc.
  2. Qualitative assessment of strength of concrete, its gradation in different locations of structural members and plotting the same.
  3. Any discontinuity in cross section like cracks, cover concrete delamination etc.
  4. Depth of surface cracks.

This is a standard ASTM test classified under ASTM C 597 – “Standard Test Method for Pulse Velocity through Concrete”

 SAMPLE PROJECTS PERFORMED BY C3S, INC.

UPV

CONDITION EVALUATION OF SECTION OF BRIDGE DECK 

C3S performed UPV Testing for evaluation of a section of the 75’ long bridge deck that was suspected to have questionable quality due to an interruption during the concrete placement from an equipment failure.

The purpose of the evaluation is to determine the variation in the quality of the concrete on the bridge for uniformity or the lack of it.

STUDY OF HOMOGENEITY OF CONCRETE COLUMNS AT INDUSTRIAL PLANT – FREEPORT

The primary intent of the test is to determine the presence or absence of voids and or cavities in the hardened concrete columns by non-destructive testing using Pulse Velocity method.

Corrosion Mapping

Half Cell electrical potential test is used to detect the corrosion potential of uncoated reinforcing bars embedded in concrete.

The test is used to determine the corrosion activity of reinforcement bars in concrete structure, which is an indicative of permeability of concrete.

This is a standard ASTM test classified under ASTM C 876 – “Standard Test Method for Half-Cell Potentials of Uncoated Reinforcing Steel in Concrete”

SAMPLE PROJECTS PERFORMED BY C3S, INC.
EVALUATION OF THREE DAMAGED TILT WALL BUILDINGS
Corrosion Mapping
Corrosion Mapping

Floor Elevation Survey

FLOOR ELEVATION SURVEYS

C3S helps its clients like attorneys, property owners/managers, insurance companies and other private companies/individuals performing Foundation and Floor Elevation Surveys/Studies to study slab-on-grade or foundation movements.

C3S presents data in form of 2D or 3D survey maps that helps clients to identify and isolate source of problem and consecutive repair strategies by mapping structural movements.

SAMPLE PROJECTS PERFORMED BY C3S, INC.

FLOOR LEVEL STUDY TO INVESTIGAE SLAB MOVEMENT FOR OFFICE BUILDING

floor elevation
floor elevation floor elevation

Ground Penetrating Radar (GPR) Scanning

C3S provides ground penetrating radar scanning services which is a reliable, non-destructive means to locate targets within concrete structures prior to drilling, cutting or coring. By performing GPR on concrete, following can be assessed:

  1. Slab Thickness
  2. Concrete Cover and Rebar Location
  3. Voids – Location and Extents.
  4. Pre Stressing Strands (PT Cables)
  5. Conduits

This is a standard ASTM test classified under ASTM D6432 – “Standard Guide for Using the Surface Ground Penetrating Radar Method for Subsurface Investigation” ( Section 1.1.2, point 11)

HOW GPR SCANNING CAN HELP IN ASSESSMENT

floor elevation

Other NDT Tests

OTHER AS NEEDED NON DESTRUCTIVE TESTING

C3S provides some other as-needed Non Destructive Testing to examine the hardened concrete structure for their suitability for its intended use:

There are various NDT tests available for concrete structures, but based on its suitability and applications they are selected

If you have identified a defect and need an assessment of the extent and severity, we will be able to help.

Schedule a consultation or inspection today.

VISUAL INSPECTION OF CONCRETE STRUCTURE

Visual inspections provides information on type, extent of damage, their possible causes and type of NDT test suitable for further investigation.

CARBONATION DEPTH MEASUREMENT TEST

This NDT is used to determine the penetration of agents of corrosion like moisture inside concrete. Its identified using Phenolphthalein indicator and is vital to assess if corrosion level has reached to the level of rebar in a structure.

SCHMIDT NDT TEST OR REBOUND HAMMER TEST

This is used to evaluate of surface hardness of concrete structures. The surface hardness of concrete is usually an aspherical indication of strength of concrete (not accurate).

Experience Matters

  • In-depth knowledge of a range of NDT methods and field experience on several projects enable us to deliver needed service.