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 presentation, through case studies, talks about emergency response services for structural issues encountered during construction of new design projects. Among other examples is an eleven story precast parking structure. The contractor observed significant diagonal faulted cracking of L-beams (supporting double-tee sections) near bearing locations, few days after pouring topping slab. In addition, inverted-tee girders were observed to be supported on cracked corbels at other locations. A quick turn around was required to mitigate any immediate life safety hazard posed by the structural distresses and buy time for thorough investigation, non-destructive testing, analyses, and repair design. Another example is a seven story precast parking structure. The structure was under construction and reportedly erected out of plumb. Poor concrete placing practices and poor weld detailing led to widespread cracking in multiple structural elements throughout the structure...
This video will illustrate an example of how various sections of ACI 562 are applied in the execution of a complex repair project, the repurposing of a historic train deck into a transportation hub for light rail trains and busses. Methods of evaluation and analysis, as guided by ACI 562, will be presented with a discussion of how these provisions lead to various repair approaches presented to the owner.
This video will discuss how the requirements of ACI 562-16 are used in the evaluation and repair of parking structures. It will take participants through a representative garage project, utilizing Design Example 1 from the Guide to the Use of ACI 562 as the basis. Evaluation and design considerations will be discussed relative to the Repair Code as well as QA/QC and the Engineers' Role during construction.
This video will illustrate an example of how various sections of ACI 562 are applied in the execution of a Precast/Prestressed Double-Tee repair project. Methods of evaluation and analysis, as guided by ACI 562, will be presented with a discussion of how these provisions can lead to various repair approaches.
The iconic construction hard hat, a symbol of pride for the construction worker, has changed very little in 50 years. Developments in the understanding of the causes and prevention of debilitating and often fatal head injuries is leading to a revolutionary change in the way we protect our people from head injuries on the jobsite. The classic hard hat is about to change forever. This presentation will focus on new technology available today to minimize the effects of falls and impacts to the head of the worker. We will also focus on new technologies, already in development, that can further provide protection from head injuries. Industry requirements (OSHA, ANSI) will be reviewed, and the application of worldwide standards (EN) will be discussed and applied to new helmet development and implementation.
This demonstration will highlight the various product forms that can be integrated in a retrofit solution for extreme loading, that the product utilizes existing retrofit construction implementation practices and provides a lighter-weight retrofit solution when compared to retrofits that utilize standard or high-strength concrete solutions, and has superior multi-threat mitigation performance when compared with other concrete retrofit mitigation solutions for extreme loading events.
This session will describe the use of tensile pull-off (bond) testing for concrete repairs and bonded overlays. It will provide guidance on applications of the test, industry standards and guidelines, acceptance criteria, proper testing procedures, appropriate equipment, and interpretation and reporting of test results. Bond is important because it relates to structural requirements (e.g. for strengthening and structural repairs) and for durability requirements (e.g. for overlays and cosmetic repairs). Testing of bond is needed to verify that the specified bond requirements have been met and a satisfactory result has been obtained.
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.