AMPP Store - Products tagged with 'reinforced concrete'

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Performance of Distributed Galvanic Anode Systems in Bridge Structures

Product Number: 51323-19214-SG

Author: Ben Ricker, Max Nie, Liao Haixue

Publication Date: 2023

$20.00

Corrosion of reinforcing steel is recognized as the major cause of the deterioration of reinforced concrete structures. Exposure to de-icing salts, seawater and chloride-containing set accelerators, plays a significant role in reinforcing steel corrosion (Figure 1). When the chloride content at the rebar level exceeds the threshold for initiation of corrosion, the passivation protective film on the rebar surface is destroyed and a corrosion cell can form either on the same piece of rebar with anodic and cathodic sites adjacent to each other, or a macro-cell between two different layers of reinforcement.

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Predicting Long-Term Exposure Performance of Galvanized Rebar Based on Artificial Intelligence and Electrochemical Methods

Product Number: 51324-21166-SG

Author: Deeparekha Narayanan; Yi Lu; Victor Ponce; Homero Castaneda

Publication Date: 2024

$40.00

In this work, we carried out electrochemical studies on ASTM A615 (bare steel rebar), ASTM A767 (steel rebar with hot dip galvanized zinc coating), and ASTM A1094 (steel rebar with continuously galvanized zinc coating) rebars exposed to two different environments. In one condition, the samples were exposed to a simulated concrete pore solution (SCPS) containing 3.5 wt.% NaCl. Over a period of 12 months, the electrochemical properties of the samples were regularly assessed through open circuit potential (OCP), linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) on a weekly basis. In the other condition, steel rebars were embedded in concrete with water-to-cement ratio of 0.53. A controlled surface area of the cast concrete block was exposed to a 3.5 wt% NaCl solution using a dam mounted on it. This method allowed for the introduction of chlorides into the reinforced concrete while maintaining control over the exposure process. Under these conditions, the rebars were continuously monitored by carrying out OCP and EIS tests for a period of up to three years since curing. Based on the experimental results obtained, we developed a mathematical framework that combines mechanistic and machine-learning concepts for analyzing the behavior of the rebars in both conditions. EIS analysis was utilized to quantify the transports processes, activation, and interface interaction of the rebars with the corrosive environments in each condition. EIS served as tool to quantify the transports processes, activation mechanisms, and interface interaction of the rebars within corrosive environments across diverse conditions. We conducted this analysis using a Time Series Prediction (TPS) approach of several phase angle plots along 300 days of rebars in pore solution and 900 days of rebars in reinforced concrete, which leveraged recurrent neural networks techniques to predict corrosion mechanisms. This approach allowed us to learn dynamically from real-time measurements, eliminating the sole reliance on domain expertise for parameter optimization. Finally, we utilized our comprehensive experimental-theoretical framework, which integrated Electrochemical Impedance Spectroscopy testing, to make long-term predictions for the performance of the rebars using neural networks techniques. These predictions spanned several years and were based on rigorous analysis. To validate the accuracy and reliability of our framework, we compared the predictions with the experimental results, thereby confirming the accuracy and reliability of our predictions.

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Reinforced Concrete Protection Using Thermal Sprayed Coatings

Product Number: 41211-609-SG

Author: Thomas D. Gibbons

Publication Date: 2011

$20.00

Reinforced concrete structures are subject to many types of deterioration. Many of these are visible; however, one that is not is the crevice corrosion that occurs internally at the reinforcing bars. To detect, mitigate and delay this type of insidious corrosion, a form of cathodic protection in the form of thermal sprayed coatings will be discussed. To implement this as a corrective action as well as a preventive action is the theme of this paper.

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RP0187-1987, Design Considerations for Corrosion Control of Reinforcing Steel in Concrete

Product Number: 53063-HD1987

ISBN: 1-57590-012·2

Author: NACE International

Publication Date: 1987

$179.00

Corrosion control guidelines for structures of steel reinforced portland cement concrete. Corrosion criteria during design. Tests of soil and water pH, resistivity, chlorides, sulfates, sulfides, bacteria, etc. Historical Document 1987

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RP0187-1990, Design Considerations for Corrosion Control of Reinforcing Steel in Concrete

Product Number: 53063-HD1990

Author: NACE

Publication Date: 1009

$179.00

Controlling corrosion of proposed atmospherically exposed reinforced concrete structures. Causes of and control methods for the corrosion of reinforcing steel in Portland cement concrete structures. Historical Document 1990

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RP0290-1990, Cathodic Protection of Reinforcing Steel in Atmospherically Exposed Concrete Structures

Product Number: 53072-HD1990

Author: NACE International

Publication Date: 1990

$179.00

HISTORICAL DOCUMENT. Cathodic protection (CP) of reinforcing steel in concrete structures. Impressed current CP systems for atmospherically exposed reinforced concrete. Not valid for pre-stressed. Historical Document 1990

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RP0390-1990, Maintenance and Rehabilitation Considerations for Corrosion Control of Existing Steel Reinforced Concrete Structures

Product Number: 53073-HD1990

Author: NACE International

Publication Date: 1990

$179.00

Corrosion control guidelines that are applicable to existing atmospherically exposed structures made of conventionally reinforced concrete. Historical Document 1990

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RP0390-HD1998-SG Maintenance and Rehabilitation Considerations for Corrosion Control of Atmospherically Exposed Existing Steel-Reinforced Concrete Structures-HD2006

Product Number: 21044-HD1998

ISBN: 1-57590-059-9

Author: NACE International

Publication Date: 1998

$179.00

This standard presents corrosion control guidelines that are applicable to existing atmospherically exposed structures made of conventionally reinforced concrete. Historical Document 1998

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RP0390-HD2006-SG Maintenance and Rehabilitation Considerations for Corrosion Control of Atmospherically Exposed Existing Steel-Reinforced Concrete Structures-HD2006

Product Number: 21044-HD2006

ISBN: 1-57590-059-9

Author: NACE International

Publication Date: 2006

$179.00

Corrosion control guidelines that are applicable to existing atmospherically exposed structures made of conventionally reinforced concrete. Historical Document 2006

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Sacrificial Anodes for Reinforced Concrete Structures: A Review

Product Number: 51317--9078-SG

ISBN: 9078 2017 CP

Author: Oladis de Rincon

Publication Date: 2017

$20.00

A review of research work in the literature to date for both laboratory and field evaluations, toward identifying technically relevant situations where the use of sacrificial anodes may or may not be a practical option for reinforcement protection in concrete structures.

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Selection of Coating Systems for Concrete in the Water & Wastewater Environment

Product Number: 41206-231-SG

Author: Roger Decker

Publication Date: 2006

$20.00

Concrete is inherently durable – nevertheless, deterioration occurs when subjected to weathering or aggressive environments. For many years, coatings have been applied for aesthetic purposes. In the water and wastewater environment concrete is protected primarily for structural purposes. The increasing use of steel reinforced concrete in modern day construction has led to a growing demand for concrete being structurally protected in all types of industry.

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SP0104-2020 The Use of Coupons for Cathodic Protection Monitoring Applications

Product Number: SP0104-2020

ISBN: 1-57590-196-X

Publication Date: 2020

$109.00

Revised in 2020! Cathodic protection (CP) coupons have been used since the 1930s by pioneers of the corrosion control industry, both in North America and in Europe. They have been shown to be a practical tool for determining the level of polarization of a structure and to confirm the IR drop in a potential measurement.

The purpose of this standard is to provide a method for evaluating the effectiveness of a CP system using coupons. It is intended for use by people who design and maintain CP systems for buried or submerged pipelines, underground storage tanks (USTs), on-grade storage tank bottoms, reinforcing steel in concrete, water storage tanks, and various other structures in buried or aqueous environments.

The body of the standard primarily addresses applications for coupons attached to buried pipelines. Appendixes cover the use of coupons for other applications, including USTs, aboveground storage tanks, internal surfaces of water tanks, and reinforced concrete structures.

This revision adds new appendixes on the use of coupons on cased pipelines and the use of coupons to measure alternating current interference data.

Products tagged with 'reinforced concrete'

Association for Materials Protection and Performance