Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Review of Mitigation of Carbonation-Induced Corrosion With UHPC

Picture for Review of Mitigation of Carbonation-Induced Corrosion With UHPC
Available for download


Recent occurrences of high visibility structural failures have spurred interest to revisit inspection and repair of aging reinforced concrete structures. Chloride-induced corrosion can cause premature damage of structures in coastal regions. Corrosion induced by carbonation of the concrete and the concrete pore water, on the other hand can occur in many other environments including structures in both wet and dry exposures. This type of corrosion can become increasingly relevant in residential buildings as housing structures age to where sufficient carbonation occurs at reinforcing steel depths.

Product Number: 51323-18977-SG
Author: Kingsley Lau, Samanbar Permeh, Sepehr Faridmarandi, Atorod Azizinamini
Publication Date: 2023
$0.00
$20.00
$20.00

An ongoing research project seeks to provide recommendations for time of inspection of reinforced concrete structural elements susceptible to carbonation-induced concrete and its repair with ultra-high performance concrete. The risk of steel corrosion can vary depending on several inter-related factors that include the structural design, its materials, and its environmental exposure. The risk of corrosion furthermore can be separated into two phases; 1) corrosion initiation where atmospheric carbon dioxide diffuses into the concrete cover and lowering the beneficial high pore water pH and 2) corrosion propagation where the active corrosion continues at an adequate rate to cause structural damage. It is evident that both corrosion initiation and propagation should be considered when establishing recommendations for structural health monitoring and inspection. Even though corrosion initiation may occur, the rate of carbonation-induced corrosion can greatly vary. The drop in concrete pore water pH can change the anodic behavior of the steel and the cathodic behavior will vary by the oxygen availability. Furthermore, there is a contradicting effect of moisture presence. Greater internal moisture content would extend the initiation time but may decrease the propagation time. The use of UHPC as a repair material can restore structural capacity and was thought to provide some level of corrosion mitigation due to its very low permeability and high electrical resistivity. Concepts involving the increase in material resistivity and reducing internal moisture availability to minimize corrosion activity were reviewed.

An ongoing research project seeks to provide recommendations for time of inspection of reinforced concrete structural elements susceptible to carbonation-induced concrete and its repair with ultra-high performance concrete. The risk of steel corrosion can vary depending on several inter-related factors that include the structural design, its materials, and its environmental exposure. The risk of corrosion furthermore can be separated into two phases; 1) corrosion initiation where atmospheric carbon dioxide diffuses into the concrete cover and lowering the beneficial high pore water pH and 2) corrosion propagation where the active corrosion continues at an adequate rate to cause structural damage. It is evident that both corrosion initiation and propagation should be considered when establishing recommendations for structural health monitoring and inspection. Even though corrosion initiation may occur, the rate of carbonation-induced corrosion can greatly vary. The drop in concrete pore water pH can change the anodic behavior of the steel and the cathodic behavior will vary by the oxygen availability. Furthermore, there is a contradicting effect of moisture presence. Greater internal moisture content would extend the initiation time but may decrease the propagation time. The use of UHPC as a repair material can restore structural capacity and was thought to provide some level of corrosion mitigation due to its very low permeability and high electrical resistivity. Concepts involving the increase in material resistivity and reducing internal moisture availability to minimize corrosion activity were reviewed.

Product tags
Also Purchased
Picture for Qualification of Low Temperature Cure, Thin-Film Linings for Aboveground Storage Tanks
Available for download

Qualification of Low Temperature Cure, Thin-Film Linings for Aboveground Storage Tanks

Product Number: 51323-18767-SG
Author: Haralampos Tsaprailis, Shan Rao, Jiajun Liang
Publication Date: 2023
$20.00

This paper presents the laboratory qualification program utilized to compare four lining systems for application down to -10°C (14°F). The lining systems were applied and cured at -10 °C (14 °F). Cure of the lining systems was monitored using differential scanning calorimetry and adhesion testing, while the performance of the linings was evaluated using electrochemical impedance spectroscopy, and autoclave and standard atlas cell testing. One of the four lining systems, Product C, a 71% volume solids epoxy that contained zinc phosphate, exhibited the most potential for low temperature field implementation.
Picture for Synthesis of Silane-Modified Nanoparticles-Based Corrosion Inhibitor for Acidic Corrosion
Available for download

Synthesis of Silane-Modified Nanoparticles-Based Corrosion Inhibitor for Acidic Corrosion

Product Number: 51323-18882-SG
Author: Norah Aljeaban, Bader Alharbi, Ahmed Busaleh, Tawfik A. Saleh
Publication Date: 2023
$20.00

Acidizing process is generally performed on wells to maximize their initial productivity and on aging wells to restore productivity and maximize the recovery of the energy resources. The process involves pumping acid into a wellbore or geologic formation that is capable of producing oil and/or gas. Well acidizing is accomplished by pumping acid into the well to dissolve limestone, dolomite and calcite cement between the sediment grains of the reservoir rocks.
Picture for Bio Fuel Feedstock and Finish products – Linings Case Study
Available for download

Bio Fuel Feedstock and Finish products – Linings Case Study

Product Number: 51323-18898-SG
Author: Ravi Nagarajan, Steve Liebhart, Pedro Escudero, Shahab Soltaninia
Publication Date: 2023
$20.00

There is a sizable push for making more sustainable, renewable, and environmentally friendly fuels. One such example is the recent emphasis on manufacturing biofuels in the form of biodiesel or bio-oil. While ethanol is also considered a biofuel and likely the most widely used it will not be a focus of this discussion.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support