concrete inspection Articles

  • Comparison of core sampling and visual inspection for assessment of concrete sewer pipe condition

    Sewer systems are costly to construct and even more costly to replace, requiring proper asset management. Sewer asset management relies to a large extent on available information. In sewer systems where pipe corrosion is the dominant failure mechanism, visual inspection by closed circuit television (CCTV) and core sampling are among the methods mostly applied to assess sewer pipe condition. This ...


    By IWA Publishing

  • Boulder Concrete Cloth Erosion Repair

    Concrete Cloth provides an affordable solution for an eroded hard-to-access residential slope. After a period of heavy rainfall, a Boulder, Colorado, homeowner discovered severe erosion in his backyard at the end of his leach field (also known as a septic drain field). He had to find a way to repair this damage and stop it from happening again; nearly half of his lawn had dropped three ...


    By Nilex

  • Ground Penetrating Radar Evaluation of Concrete Tunnel Linings

    Abstract - Ground penetrating radar was used to map tunnel lining condition and locate concrete deterioration and voids in a continuous and non destructive manner. GPR surveying of Kapoor Water Supply Tunnel, Victoria, Canada was carried out with a 1000 MHz Sensors and Software Ltd., Conquest system mounted on a custom built cart. This 8.8 km long 2.3 m diameter concrete lined circular tunnel was ...


    By SewerVUE

  • Inspection of Internal Structure of Walls by Subsurface Radar

    ABSTRACT This paper deals with the application of ultra-wide band time-domain subsurface radars, equipped with special signal processing techniques, to realize non-invasive image testing of the building walls' internal structure that are made with brick, stone, concrete, reinforced concrete and other construction materials. There are two normally associated problems, qualitative and ...


    By Transient Technologies LLC

  • Robot Device for Pipe Inspection - Case Study

    In 2005, Pure Technologies (Pure), a provider of various structural monitoring and leak-detection technologies, set about to develop a pipeline assessment tool that could monitor and report on the condition of pre-stressed concrete cylinder pipes (PCCP) utilized in municipal water and sewer systems. The tool’s competitive advantage would be accurate assessment decoupled from the need to ...


    By Pure Technologies

  • Case study - City of Rockville - Robotic Pipeline Inspection

    Service: PureRobotics - Robotic Pipeline Inspection Client: City of Rockville Project Date: July 2010 Type of Pipeline: Water Transmission Main Diameter: 24-inch Pipe Material: PCCP Length: 53,000 feet Results: 3 pipe sections identified at risk Insertion of Pipeline Inspection Robot Pure Technologies (Pure) was contracted to provide robotic pipeline inspection ...


    By Pure Technologies

  • A Monster Pipe Demands Monster-Size Inspection Approach

    From a purely visual perspective, some pipeline inspections are more awe-inspiring than others. This is especially true when everyone involved describes the pipe diameter as “monster-size,” clocking in at 210 inches in diameter. A challenge of this magnitude requires fresh thinking from an inspection approach, especially when the subject pipe is so critical to the lifeblood of the ...


    By Pure Technologies

  • In-situ stress measurement in concrete - a component for the geolocation of the destruction with earthquakes

    So the in-situ stress sensors in the concrete could measure the load changes and stress changes with a building damage after eniem earthquake immediately on-line. The alert with GPS item data is spread world-wide over the Internet. The combination also for everyone accessible maps of the world can facilitate the management after disasters substantially. So fast data are available over destroyed ...


    By IBJ Technology

  • Rocky reach spillway apron underwater concrete repair - Case Study

    We were contracted to preform an underwater concrete repair to the spillway baffle under spill gate 3, and preform an inspection of the spill way and dentate from spillway 2-8 and 9-12. The spillway was separated into two sections by a fish ladder between Bays 8 and 9. The perimeter of the eroded areas were delineated using an U/W track creating a key way, ensuring a minimum depth of repair, ...

  • Combined application of Pipe Penetrating Radar and LIDAR for large diameter pipe inspection

    Abstract: Pipe Penetrating Radar (PPR) is the underground in-pipe application of ground penetrating radar (GPR), a non-destructive testing method that can detect defects and cavities within and outside mainline diameter (>18 in./450mm) non-metallic (reinforced concrete, vitrified clay, PVC, HDPE, etc.) underground pipes. Light Detection and Ranging (LIDAR) has become an accepted method for ...


    By SewerVUE

  • Canadian Food Inspection Agency (Cfia)Manitoba Composting Exercise

    Overview: Nordevco was invited to participate in a Canadian Food Inspection Agency (CFIA) composting exercise by the CFIA Manitoba Team. The purpose of Nordevco’s participation was to evaluate the impact of BactiDomus Technology on the composting process specifically related to achieving and maintaining temperatures appropriate for the inactivation of the pathogen responsible for avian ...


    By Nordevco Associates Ltd.

  • ROV Inspections of Water Towers: Underwater Drone Used to Save Diver’s Time

    Mountain West Commercial Diving currently uses their Deep Trekker underwater drone to conduct ROV inspections or potable water towers. Aim to exceed the client’s expectation while adhering the highest standards in industry compliance and safety; that is the goal of Mountain West Commercial Diving (MWCD). Based out of Hazelton, Idaho, MWCD has over 25 years of experience in successfully ...


    By Deep Trekker Inc.

  • A multi-environmental time similarity theory of life prediction on coastal concrete structural durability

    A multi-environmental time similarity (METS) theory for durability assessment and life prediction is presented in this paper. The METS theory is able to connect the field inspections and the indoor accelerated tests by introducing a third reference site, which has certain service life and similar aggressive environment to the study objective. Thus, the correlation between the field inspection ...


    By Inderscience Publishers

  • Structural performance evaluation of heavily deteriorated RC members based on simplified inspection results

    Port and harbour structures are generally affected by harsh marine environmental actions. Material deterioration and damage to structural components are likely to occur throughout structure's service period. In order to select suitable methods of countermeasures for such structures, structural evaluation by using simplified inspection results shall be necessary. The methodology and accuracy of ...


    By Inderscience Publishers

  • Evaluation of E. coli biofilm as a protective barrier against microbiologically influenced deterioration of concrete (MICD) under mesophilic temperatures

    In this study, Escherichia coli DH5α biofilm was evaluated for its potential to control and minimize microbiologically influenced concrete deterioration (MICD) under mesophilic temperatures (37 °C). Escherichia coli DH5α biofilm was first grown on Portland cement mortar disks for 8 days. Mortar disks were then exposed to ...


    By IWA Publishing

  • City Of Vancouver Deploys Free-Swimming Tools For Successful Inline Inspection Of Pressurized Main

    With its Pacific Ocean entranceway and towering backdrop of snow-dusted mountains, it’s no wonder the City of Vancouver ranks among the most laid-back, beautiful cities in Canada, and indeed, the world. Water is in its blood. This spring the coastal seaport city retained the services of ...


    By Pure Technologies

  • Multi-sensor inspection robot shows benefits of pipe penetrating radar - Case Study

    Pipe penetrating radar (PPR), the in-pipe application of ground penetrating radar (GPR) is one of the most promising quantitative pipe condition assessment technologies to emerge in recent years. With most of the underground pipe infrastructure reaching the end of their design life there is a need to provide measurable data in order to establish the extent of rehabilitation required or the timing ...


    By SewerVUE

  • When Speed and Accuracy Count: Enwave Houston and Oklahoma City Successfully Deploy Sahara Tool for Leak Inspection Projects in Record Time

    Sahara technology is winning accolades from satisfied owners and operators of buried infrastructure the world over. In North America, two recent projects demonstrate the benefits of using this in-line tethered tool for critical leak detection surveys, especially when speed and accuracy are paramount. ...


    By Pure Technologies

  • Case study - California sulfate damage awards

    The construction defect trial went against developer Brighton Homes, concrete subcontractor James Mock Inc, and concrete supplier Owl Rock Products, based on negligence to abide by the provisions of the Uniform Building Code (UBC). The significance of this verdict is that while sulfate attack of concrete from the surrounding soils has been widely known and researched in the United States, ...


    By Headwaters, Inc.

  • Corrective action at a hazardous waste unit

    Troy Risk performed a RCRA Corrective Action at a closed hazardous waste landfill for a multinational landfill company. The work involved inspection and cleaning of two 85-foot leachate risers. A leachate riser is a stack of 4-foot diameter concrete pipe sections, which provide a passage to the bottom of the hazardous waste landfill. The riser provides access to pumps and electronic leachate ...


    By Troy Risk, Inc.

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