H2020Индивидуална стипендия2019–2021

PERFoRM · Passive layER FailuRe Mechanisms for Steel Embedded in Alkali-Activated Slag Materials

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-06-03 → 2021-06-02
Финансиране от ЕС: 212 934 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Механизмите на корозия при стоманената арматура в нисковъглеродни бетони се анализират чрез влиянието на въглеродния диоксид и хлоридите. Това помага за подобряване на издръжливостта на инфраструктурата и намаляване на разходите за нейния ремонт.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Passive layER FailuRe Mechanisms for Steel Embedded in Alkali-Activated Slag Materials

Corrosion of steel reinforcement in concrete is a degradation mechanism representing a major worldwide infrastructure challenge. Globally, €2.2 trillion (~3.4% of the global GDP) is spent each year to prevent, mitigate, and repair civil infrastructure damage due to corrosion of steel reinforcement. This societal impact presents an urgent need to understand and monitor corrosion phenomena to improve resiliency against in-service environments. Additionally, with the advent of global climate change challenges, the decarbonization of the built environment with durable low-carbon cementitious materials is imperative. The primary aim of the Passive layER FailuRe Mechanisms (PERFoRM) project is to understand how in-service environmental conditions (e.g. CO2 and/or chloride) influence the stability and failure (i.e. corrosion) of the passive layer on steel rebar embedded within concretes based on innovative low-carbon cementitious materials (i.e. near-neutral salt activated slag materials). Investigations on the passive layer formation, stability, and breakdown are lacking due to the short timescales of their formation as well as the pore solution chemistry dependence on their physical and electrochemical properties. Thus, the PERFoRM project takes one first step to understand the processes affecting the formation, development, and breakdown of the passive layer in order to engineer reinforced low-carbon cementitious materials with improved corrosion durability. The key objectives of PERFoRM are: 1. Developing novel durability wireless embedded (D-WirE) sensors for in-situ monitoring of concretes 2. Ground-breaking monitoring of chemical and physical changes induced by carbonation/chloride penetration in NnSAS 3. Advanced characterisation of passive layer growth, breakdown, and failure rates of steel rebars embedded in NnSAS 4. Creation of service-life models by incorporation of in-situ carbonation and chloride penetration regression models

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

PERFoRM will unveil how in-service environmental conditions influence the stability of the passive layer on steel rebar embedded in concretes based on low-carbon cementitious materials (i.e. near-neutral salt activated slag materials (NnSAS)), when exposed to environmental threats. NnSAS offer high carbon emission savings, compared to other construction materials, however their long-term performance is largely unknown. PERFoRM will implement non-destructive techniques (NDTs) for the in-situ diagnosis of steel reinforced concretes, and in-situ tracing of aggressive ions; along with cutting-edge electrochemical techniques to determining corrosion rates closely resembling in-service concrete structures. Advanced characterisation of the passive layer using environmental XPS, and the steel-concrete interface using u-CT will also be carried out. The main scientific focus areas of PERFoRM will be:• Developing novel durability wireless embedded (D-WirE) sensors for in-situ tracing of aggressive ions (e.g., chlorides) and monitoring of internal factors (e.g. relative humidity, pH) in concrete• Ground-breaking work monitoring chemical and physical changes induced by carbonation/chloride penetration in NnSAS mainly using NDTs• Advanced characterisation of the passive layer growth, breakdown, and failure rates of steel rebars embedded in NnSAS • Creation of service-life models by incorporation of in-situ carbonation and chloride penetration regression models PERFoRM will bring unique insight about all potential aspects influencing corrosion mechanism and stability of the passive layer forming in steel embedded in NnSAS. This will enable performance-based materials design, and selection of remediation strategies to ensure the safety of in-service novel self-sensing and low-carbon NnSAS. PERFoRM will be integrated with collaborative programmes coordinated by RILEM and EFC, providing a direct route to international awareness and utilisation of the fellowship outcomes.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITY OF LEEDS · LeedsКоординаторОбединеното кралство