Maintenance & Repair Phase

Our mission is to minimize repair and maintenance costs.

We offer our expertise to help you minimize maintenance costs and prevent costly repairs. We help you understand underlying causes of the problems prior to starting any extensive repair.

We provide cost-effective recommendations based on our analysis and evaluation. The sooner we are involved, the greater the potential for savings during the lifespan of your structure.

No structure or project is too big or too small for C3S!

Condition Assessment

Condition Assessment

C3S, Inc. provides periodic conditions assessment services to clients on wide range of concrete structures from residential driveways, parking lots to parking garages and infrastructure. Condition assessments are important to assess the following:

Evaluate of condition of concrete, rebar and other elements to determine the general existing condition through

  • Visual Inspections
  • Non Destructive Testing methodologies like Ultrasonic Pulse Velocity (UPV) Testing, etc.
  • Destructive Testing methodologies like Petrographic Evaluations, Chloride ion content determination, scanning electron microscopy

Evaluate reserve capacity of structures.

  • Performing structural analysis to determine the reserve capacity of the structures.

______________________________________________

Sample Project – 1

Evaluation of Infrastructure at a Port Facility on the Gulf Coast, USA; Inspection of individual concrete piles and documenting defects.

______________________________________________

Sample Project – 2

Condition assessment and investigation of distress on a tilt wall comercial building.

Forensic Investigation

Forensic Investigation methodologies are used to identify general distress observed in concrete and other construction materials.

Concrete

Concrete Cracking

Surface Distress such as surface scaling, spalling etc.

Reinforcement corrosion in concrete

Alkali-Aggregate Reactions (ASR)

Internal and External Sulfate attacks, Delayed Ettringite Formation (DEF)

Acid attack

Efflorescence, Loss of Strength and Physical Salt Attacks

Poor Quality Control and Assurance – Failure to Conform to the Project Specification during Construction

Moisture Transmission on Concrete Slab-on-Grades

Masonry

Cracking, Bond Strength

Mortar Evaluation – Type, Composition, Condition, Comparison

Veneers & Stuccos:

Cracking, De-bonding, and Other Failures in Stucco

Paint and other protective Failure

__________________________________________

Sample Project: Evaluation of Filter System at a Water Treatment Plant

Shows a porous paste section of Filter B

Shows a dense paste section sample of Filter A

shows photomicrograph of dense hydrated sample of Filter A at magnification of 800X

shows photomicrograph of porous hydrated sample of Filter B at magnification of 800X

Two filter underdrain failures at a Water treatment plant in Houston prompted an investigation of the cementitious grout in two filter systems at the Plant.

The sample from Filter A, was found to be strong and durable; that from Filter B was weak. Average compressive strength of the strong sample is 8,440 psi; the weak grout tested at 1,860 psi.

Petrographic analysis and scanning electron microscopy showed stark differences between the two grouts. The cement paste in the strong grout is dense and compact; that from the weak grout is porous.

Experience Matters

  • We conduct thorough condition surveys
  • Condition surveys are supported by field and laboratory tests, where necessary
  • We identify problems and make appropriate recommendation for repairs
  • Competent repair contractors are recommended to client for bidding process.