This demonstration will show the repair of cracks in concrete using structural polyurethane injection without pumps, ports or cutting, featuring Roadware 10 Minute Concrete Mender and Easy Injection System. This no cutting method generates almost no dust making silica dust mitigation much easier.
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.
Moisture-related problems with floor coverings and coatings are a serious and costly issue. Each year the direct and in-direct costs associated with such problems amount to billions of unplanned dollars. In this 5-part webinar series, experts in the field of moisture in concrete, testing, mitigation and repair will share information and experience in a ground up approach to the causes and solutions to such problems. The program covers the sources of moisture in concrete, the affect moisture has on slab behavior and the installation of flooring materials, the test methods used to properly assess slab moisture condition, moisture mitigation strategies, and more.
Industry questions related to moisture-related floor covering and coating failures will be answered by the presenter during a 1-hour webinar. Questions will come from ICRI members through a survey conducted prior to the webinar and PPT slides addressing the questions prepared by the presenter. Questions from webinar attendees will also be answered during the webinar.
The case-histories based presentation will focus on the use of nondestructive evaluation (NDE) methods to detect flaws and damage in concrete construction. Case histories will be presented for detection and mapping of flaws and damage in concrete such as cracking, delamination, honeycomb, void, corrosion, fire damage, alkali-silica reaction and low strength concrete. The case histories for the concrete structures are anticipated to include parking structures, bridges, buildings and dams. NDE methods will include sonic/ultrasonic, infrared thermography, radar and corrosion technologies where the results in many cases were confirmed by coring. The use of some of the NDE methods for QA of concrete repairs such as epoxy injection and patching will also be discussed.
Sikalastic One Shot products, Sikalastic-720 One Shot & Sikalastic-726 Balcony One Shot, will be demonstrated. Sikalastic One Shot products are an innovation in traffic coating membranes that replace the need for a base coat and multiple top-coats in a single step. These products re-imagine how traffic coating systems are designed with a polyurethane resin that has both a flexible crack-bridging ability and is extremely durable. Sikalastic-720 One Shot is a one coat system of 45 mils with a proprietary aggregate blend designed for vehicular traffic. Sikalastic-726 Balcony One Shot is a primer-less single step polyurethane system of 35 mils with a proprietary integral texture designed for balconies and pedestrian traffic....
Nondestructive testing is often used in conjunction with traditional methods to assess construction, material, or structural deficiencies in new construction. This presentation describes evaluation of unique delamination failures within below-grade, exterior walls of a new subway station. The walls were conventionally reinforced mass concrete cast against a soldier pile and lagging retention system. Shortly after construction, leakage at cracks and joints was observed and injection processes led to delamination of the interior surfaces. The assessment objectives were to determine the extent and cause of near-surface discontinuities and evaluate the structural integrity of the walls. Nondestructive testing included flaw detection using Impulse Response [structural mobility testing] and reinforcement locating using ground-penetrating radar. Sampling and petrographic examinations were conducted to correlate test results with distress conditions and evaluate the in-situ concrete.
Concrete is the most widely used construction material and can be durable for hundreds of years; however, the main cause of concrete deterioration is from corrosion of reinforcing steel. Steel is thermodynamically unstable and will eventually oxidize to a lower energy state. The rate of deterioration in new and existing structures can be modeled to predict the service life based on the severity of the service environment, the concrete quality, the ingress of deleterious materials, and other factors to various degrees of success. This presentation will provide an overview of many of the service life models currently in use and provide an evaluation protocol for their application related to both new and existing structures.