High Traffic Commercial/Light Industrial applications including light manufacturing, warehouse/big-box stores and high traffic retail applications present their own unique challenges in concrete repair. This presentation will review concrete repair options that a focused on those application that may require both fast application/turnaround time and strength/use durability for forklifts and trucks. High Traffic Commercial/Light Industrial applications including light manufacturing, warehouse/big-box stores and high traffic retail applications present their own unique challenges in concrete repair. This presentation will review concrete repair options that a focused on those application that may require both fast application/turnaround time and strength/use durability for forklifts and trucks. While there are many option for quick repair that can be open to use in a matter of hours, it is important to acknowledge he potential limitations of these options over the long term.
Grout-filled socks combined with threaded bars are gaining popularity to form a strong chemical and mechanical bond for securing external walls to hollow concrete floor slabs, for stitching cracked solid and multi-lead walls, for stabilizing rubble-filled walls, and securing unstable parapet walls and arches. This technology is ideal where high levels of performance are required in bending for heavy duty, high load applications. The demonstration session will provide an overview of this fast, efficient, proven installation technique.
The FRCM externally bonded Composite Strengthening Systems repair and reinforcement solution combines high-performance sprayable mortar with a carbon-fiber grid that creates a thin structural layer without significantly increasing the structure's weight or volume. With FRCM, contractors can effectively repair, protect, and strengthen concrete and masonry structures in a single application for a fraction of the installed cost of traditional shotcrete.
The Ituango dam is an embankment dam that is currently under construction on the Cauca River in Colombia. The largest hydroelectric power plant in Colombia’s history. Three large diversion tunnels used to divert the water from the river around the construction site during construction collapsed as a result of heavy rainfalls. The nearly completed pump house had to be flooded to accommodate premature water build-up in the reservoir. These tunnels would need to be permanently sealed. “Pre-stoppers” would need to be constructed in place to serve as bulk heads between which would ultimately be excavated and back-filled with concrete to permanently seal the tunnels. Additional to standard anti-washout properties, the grout had to withstand swiftly flowing water and exhibit an extended working time at temperatures above 32 degrees C. A custom grout was developed for this application. In the end, hundreds of grout micropiles were tremied, consuming more than 1,650 tons of grout, to produce...
Alkali-Silica Reaction (ASR) can cause significant damage to concrete structures including bridges, roadways, airport runways, and nuclear power plants. When reactive aggregates are included in a mix, the presence of moisture initiates a reaction between the alkaline cement paste and reactive amorphous silica. The result is a gel that continues to dilate, which may cause cracks in the concrete mass. A research program was undertaken at the University of Toronto to investigate the effects of ASR on large-scale and small-scale concrete specimens. Several specimens were constructed using reactive (ASR) concrete and non-reactive (regular) concrete, and their short-term and long-term structural and mechanical behavior were compared. In this presentation, we will discuss the results of the research program, will offer best practices to minimize the risk of ASR in concrete during placement, and will propose several strategies for repair of structures that have been degraded due to ASR.
Presentation will discuss Vision 2020 (Development, Successes and Challenges) as well as items which still need to be completed. This portion of the presentation will be followed by an overview of the presenter's perspective on the future needs for the concrete repair industry. All attendees will be invited to participate in a workshop to develop a complete list of industry needs (consensus if possible).
The installation of externally applied FRP systems has been slow to evolve due to limitations of materials used in the field. This demonstration will show how to make the most out of the materials with efficient application methods that will save time and money.
Three precision epoxy grouts: E3-Deep Pour, E3-Xtreme and E3-Flowable will be demonstrated. These products are precision grouts used to support equipment and machinery in demanding environments. The demonstration will explain why and where epoxy grouts are used, how they are tested, project preparation, mixing and application, and other considerations. The features and benefits of each product will be described, and newly patented dust-limiting aggregate technology will be introduced.
As long as there is concrete there will be concrete cracks. There is no shortage of repair methods for cracked concrete but the challenge is to find the right one that meets your specific needs. This product demonstration will cover polyurethane injection for leak mitigation. The area of focus will be understanding why concrete cracks, when to use polyurethane or epoxy injection, safety and equipment required for injection work, and lastly, the injection process itself.
The demonstration will include historical products and processes used for repair of tilt-up wall and precast concrete structures, new technology developments, proper material selection, and application methods.