From the days of boiled Linseed oil, to the discovery of membrane forming cures, to the development of carbon dioxide injection; curing has evolved to accommodate the demands of the construction industry. This presentation will look back at the early standards developed by ASTM, contrasting them to the standards that are currently under consideration. There are many ways to cure concrete, this presentation will review the various product options framed in the context of weather. Lastly, the presentation will explore the various methods discussing the features and benefits of the common curing practices of today.
Post-tensioned concrete is a strong and durable material for construction of exposed parking structures. These types of structures are also fire resistant, but they can be damaged depending upon the severity of the fire. The structure in this presentation suffered significant fire damage early in its construction. The presentation will cover the discovery and testing methods used to determine the extent of fire damage, and the design of the repairs that were instituted to restore strength and allow construction to continue.
This 60-minute session will be comprised of a 10-15 minute introduction to ACI 562, followed by a 45-minute discussion by a moderated panel of various experienced stakeholders in the concrete repair industry, including Specifiers, Contractors, Manufacturer/Distributors, and Owners.
This demonstration covers MiraGard Granite, a water-based dual component, self-crosslinking acrylic resin binder specifically designed for use as a decorative vinyl flake broadcast system to simulate the depth and texture of natural granite stone. The product is moisture vapor permeable and can be used as a beautiful decorative topcoat over new concrete or existing concrete needing repairs whether exterior, interior, slabs-on-grade or elevated slabs. It is also rapid curing and can be completed in one day with fast return to service typically in as little as only 24 hours, and offers outstanding durability and wear resistance, UV stable for superior color retention and weathering resistance, good resistance to moisture absorption, environmentally friendly and VOC compliant and water-based for easy clean-up.
This demonstration shows Sika's new one coat traffic coating systems. Sikalastic®-720 One Shot is a two-component, integral texture, fast-curing, aliphatic, elastomeric polyurethane waterproofing coating intended for vehicular and pedestrian traffic. Applied in a single step, Sikalastic®-720 One Shot replaces the need for a base coat and multiple topcoats. Sikalastic®-726 Balcony One Shot is a two-component, aliphatic, elastomeric polyurethane traffic coating system that has both superior flexibility and abrasion resistance. Easily applied in a single coat, with or without primer, and designed for pedestrian traffic, specifically balcony and pedestrian applications.
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 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.
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.