Gil Brindley’s Post

Rebar corrosion is a recurrent problem in the construction industry. More specifically, it can: 📉 Affect the quality of a project by cracking and damaging the concrete 💸 Add costs of repairs Fortunately, there are new technologies that can help us deal with corrosion in a practical manner! 🌟 iCOR® is the most convenient corrosion rate measurement device in the field and offers an innovative research tool for laboratory studies. It gives engineers a comprehensive understanding of concrete quality and the level of corrosion—allowing them to make faster, more informed decisions when it comes to rehabilitation and repair. Get the details about iCOR in our blog 👇 https://hubs.ly/Q02hKd_30 #Corrosion #Concrete #Rebar #Sensor #CEPRA #Technology

What is a half-cell potential test? Corrosion is a natural process that occurs when a structure is exposed to elements like CO2 or chloride, which can penetrate the concrete all the way to the steel reinforcement. This can have serious durability and safety consequences, which is why it is important to monitor corrosion using an accurate and trusted method. The half-cell potential test is the only corrosion monitoring technique standardized in ASTM C876 – 15: Standard Test Method for Corrosion Potentials of Uncoated Reinforcing Steel in Concrete. It is used to determine the probability of corrosion within the rebar in reinforced concrete structures. Read this blog to learn more details: https://hubs.ly/Q02lYDpQ0 #corrosion #concrete #tech

Did you know that corrosion can significantly impact the structural performance of reinforced concrete elements?  Learn more about the structural effects of corrosion from this article by FPrimeC Solutions (https://lnkd.in/e8XSPsCS ) and how it can compromise building safety, leading to issues like reduced strength, limited ductility, and increased fatigue.  To combat this, our Portagauge® 5 ultrasonic thickness gauge can help detect and prevent corrosion-related issues by accurately measuring material thickness and identifying potential weaknesses. Ensuring the durability and integrity of your structures with our advanced technology. Drop us a message to learn more! #BuildingSafety #CorrosionAwareness #Portagauge5

When applying boron nitride thermal barrier coating to steel surfaces, there are several important things to note: Surface Preparation: The steel surface must be properly prepared to ensure that the coating will adhere firmly. Typically involves cleaning, removing grease, rust and other contaminants, followed by grinding or sandblasting to improve surface roughness and increase coating adhesion. Coating selection: Choose a boron nitride thermal barrier coating suitable for the steel surface. This may involve different types and formulations of coatings, chosen based on the specific use environment and performance requirements. Coating construction: Strictly follow the construction guidelines provided by the coating supplier for coating construction. Ensure that coating is carried out under appropriate temperature and humidity conditions, and that correct coating techniques and coating thickness requirements are followed. Coating Smoothness: The steel surface should remain smooth to ensure that the coating can be evenly distributed and achieve the required properties. If necessary, the steel surface can be further treated to eliminate bumps and unevenness. Heat treatment: After construction is completed, the coating usually needs to be heat treated to ensure that the coating can achieve the required hardness and wear resistance. This step may need to be carried out at specific temperatures and times, depending on the nature of the coating chosen. Quality control: During and after construction, strict quality control and testing are carried out to ensure that the coating meets relevant technical standards and performance requirements. In summary, when applying boron nitride thermal barrier coatings, attention needs to be paid to steel surface treatment, coating selection, construction technology, quality control and other aspects to ensure that the final coating has excellent performance and durability.

For concrete material testing, clients frequently seek guidance on which tests will provide the most valuable insights and how each one can best meet their specific project requirements. The carbonation depth test is crucial for assessing the risk of corrosion and estimating the remaining service life of your structure. This test measures how deeply carbonation has penetrated the concrete and whether this depth poses a risk for corrosion activity.   Carbonation occurs when carbon dioxide diffuses into moist concrete, lowering its pH. If the pH drops sufficiently surrounding the reinforcing steel, it can lead to the corrosion of reinforcing steel - effecting the durability of your structure.   While carbonation depth tests provide valuable information, they are just one aspect of understanding your structure’s condition. Combining various testing methods gives our engineers a comprehensive view of your structure’s durability and potential issues.   Choosing the right tests can be challenging due to the variety available. Our expert team at VCS will guide you in selecting the most effective and economical methods for your needs.   Want to address corrosion and durability concerns? Contact us today! https://lnkd.in/gXeZhWBa #concretematerialtesting #corrosionprotection #corrosionprevention #carbonationdepth #engineering

The AISC Design Guide 24: Hollow Structural Section Connections (Second Edition) has just been released. It provides a comprehensive explanation on design of HSS connections, complementing the guidelines in the Specification for Structural Steel Buildings (ANSI/AISC 360-22). I am proud to have two of my papers referenced in this Design Guide, discussing the design of steel plates in bending using its ultimate stress, in lieu of its yield stress. As part of the technical committee, this approach is also adopted by the incoming Brazilian standard for steel structures: Design of Steel and Composite Steel and Concrete structures for buildings (NBR 8800-24). If you want to know more: Fidalgo, A., and J.A. Packer. 2022. Evaluation of bolted CHS flange-plate connections under axial tension. J. of Constr. Steel Res., 196: 107399. https://lnkd.in/gkNzpbe4 Fidalgo, A., and J.A. Packer. 2023. Bolted CHS flange-plate connections under bending. J. Struct. Eng., 149(6): 04023066-3. https://lnkd.in/gJA_wChP

The Schmidt rebound hammer is a surface hardness non-distractive instrument to estimate the compressive strength of concrete. Although the rebound hammer provides a quick and inexpensive method to check the uniformity of concrete, engineers should consider some serious limitations. I have performed this test for concrete structures assessment in many projects and I designed an EXCEL spreadsheet according to ASTM C805 to analyze the test results.

#DYK? Crushing concrete cylinders is a critical step in assessing the strength and durability of concrete used in construction. By performing a compression test on these cylinders, engineers can determine the concrete's compressive strength, which is essential for verifying that structures can withstand the loads they will face. This process not only helps maintain safety standards but also aids in quality control, allowing for adjustments in the concrete mix if necessary. Properly tested concrete cylinders provide valuable data that contribute to the longevity and reliability of buildings and infrastructure! #CMTeam #MaterialsTesting #SpecialInspection #Labs

Influence of the microstructure of TMT reinforcing bars on their corrosion behavior in concrete with chlorides Highlights • Corrosion studies of TMT bars in simulated pore solutions and in concrete slabs. • The outer martensite acts as anode and the core as cathode when both parts of the bar are coupled. • The core material does not meaningfully increases the corrosion rate of the outer martensite. • The usual depth of the pits is related to the microstructure of the TMT bars. • Once the pits reach the martensite-core interlayer, they tend to progress by mouth widening. There is a corrosion study carried out with TMT bars where weight losses after sea water and fresh water immersions were measured [5]. The results obtained in this research suggest that the corrosion resistance of TMT bars could be higher than that of conventional hot rolled reinforcing bars. Another corrosion study with TMT bars also reports weight losses in NaCl solutions [6]. Recent preliminary results on the effect of the galvanic coupling between TMT and conventional reinforcement steels on their corrosion performance The frequent use of TMT bars and the clear interest of corrosion performance evidence the need for obtaining more complete information about how the phases present in their microstructure can influence the development of the attack in the bars. In this work, the influence of the microstructure originated by the TMT on the corrosion behavior of reinforcing bars is analyzed in solution tests, using different electrochemical techniques. The relative corrosion resistance of the phases present in the bars, their interaction and the resulting impact on the corrosion mechanism are analyzed. There are several factors implied in the onset and development of the corrosion of steel in concrete that are impossible to replicate in solution tests Hence, bars are heavily corroded in concrete slabs for different times, and a morphological analysis of the shape of the main pits detected is carried out to verify the results obtained in solution about the influence of the microstructure in the development of the pits. For knowledge only