In this presentation, industry expert David Whitmore will explain how various factors govern the service life of zinc based cathodic protection systems and how we can achieve accurate service life designs.
The demonstration will cover the basic steps, products, and processes involved with dying and polishing concrete. The equipment, tooling, chemicals, and processes used to achieve a polished floor will be demonstrated.
EDCC is an extremely novel and first of its kind application for use primarily in the seismic retrofit of unreinforced masonry walls. This spray-on technology incorporates a highly sustainable and cost-effective mixture of recycled admixtures that have proven to be extremely effective at greatly enhancing the ductility and strength of unreinforced structures. Its ease of placement and unique flexural advantages make it very unique in the field of seismic upgrade with the potential for additional applications with other infrastructure improvements.
Vertical/overhead repair mortars are traditionally hand- or spray-applied. Small repairs are suitable for hand application; whereas, low pressure spray equipment is useful for large projects. Mortar guns are commonly used for tuckpointing applications using site-mixed, masonry mortar. As most vertical/overhead concrete repair materials exhibit a stiff consistency, such mortar guns have not been widely implemented in concrete repair applications. With its unique, thixotropic rheology, MasterEmaco N 425 is well suited for use with such equipment. This demonstration presents the ease of application of MasterEmaco N 425 using a Quikpoint 3000 mortar gun.
Using Unmanned Aerial Vehicles and Systems (aka UAVs aka Drones) continues to be a hot topic for engineers and designers. Within the past 10 years, we have seen technology change how we live, work, play and learn. These advances in technology have enabled humans to be more efficient as well as socially and environmentally conscious and connected. Advances in engineering technology and efficiency have expanded structural engineer’s roles in inspection services. This presentation will highlight drone utilization for exterior surveys and inspection, impact on the built environment, and how drones will continue to influence in the future. This includes areas that are too dangerous for humans or structures where rigging can be difficult or impossible as well as the cost benefits of using a drone. The presentation will also delve into the effectiveness and appropriate applications of drone usage, specifically for hands-on applications.
The Avalon Mall parking facility is a four level above grade structure, consisting of three suspended parking levels (approximately 7,750sq.m. each) and one on-grade parking level connected to the existing mall with a new pedestrian bridge. RJC was the structural engineer of record. During construction of the parking structure extensive cracking of the suspended parking garage slabs was noted at two of the 24 pours. RJC undertook a visual assessment of the parking slabs in question to determine the extent of the noted cracking and determined over 750lin.m. of cracks ranging in size from 0.5mm to 6.5mm in width. Following the visual assessment destructive testing of the concrete was undertaken to determine its in-situ properties as well as to understand the full extent of the cracking.
A follow-on presentation to the discussion of our evaluation of over 1500 tire and lube facilities across the United States that prescribed immediate repairs where necessary, reinforcement where deterioration reduced capacity below acceptable levels and coatings necessary to protect structural steel and structural concrete (i.e. our 2019 Philadelphia presentation). This will be an in-depth presentation of how repairs were specified for (3) specific types of structures. The (3) structure types are exposed structural concrete, composite metal deck and fully reinforced form deck slabs all supported by steel structures and reinforced concrete walls. Presentation will include before, during and completion photos of each project discussed. Again, touch on the evaluation processes to include demand to capacity ratios review, evaluation system and inspection form, triggers to determine when shoring is necessary, calculation of capacities per AISC 360, ACI 318, ACI 562 and local building codes.
Two projects will be explored in this presentation. The first is a concrete structure which for 20 years was exposed to extreme heat. The second is a structure which was exposed to extreme vibrations. Both these structures were integral parts of manufacturing processes and required limited down time to repair. The questions needing to be answered were: what is the condition of the existing concrete and what are the repair options for these structures. We turned to non-destructive techniques to evaluate these structures. Non-destructive techniques can provide insight into structures when accompanied by experienced engineers and petrographic analysis. Repair options were provided at the end of our evaluation leading to reduced down time and well-planned repairs.
The demonstration will cover the use of MAPEI’s high alkaline corrosion inhibitor, Mapefer 1K and encapsulation of the repair area with Planitop 12 SR. Planitop 12 SR is a versatile, sulfate resistant, fiber-reinforced, with silica fume and corrosion inhibitor that can be applied by hand, pump, or spray on horizontal and vertical surfaces. Demonstration will show how to utilize these products in accordance with ACI Repair Application Procedures (RAP) 3, 6, and 7 as well as ICRI Guideline Nos. 310.1R and 310.2R. Demonstration will showcase a project where Planitop 12 SR was recently used to repair a Wastewater Treatment Tank.
This demonstration video will provide information and details from Commercial and Healthcare projects for scheduling, materials, manpower, methods and protection measures necessary for the installation of a moisture vapor control (MVC) system along with self-leveling underlayments (SLU) for floor finish preparation and protection.