Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sustainability effects of including concrete cracking and healing in service life prediction for marine environments
With today’s focus on sustainable design, it is necessary to adequately predict and prolong service life of concrete in marine environments. By introducing self-healing properties, service life extension can be achieved. However, in prediction models, the required concrete mix specific input is usually not available. Moreover, little attention goes to the unavoidable presence of cracks. Finally, autonomous crack healing has almost never been taken into account. In this paper, the relevant model input was estimated from experimental chloride profiles. It enabled an adequate prediction of the chloride-induced steel depassivation period for cracked and uncracked 15% fly ash concrete (8–104 years, respectively). Comparison with self-healing by means of encapsulated polyurethane indicated a 48–76% self-healing efficiency. It could extend the corrosion initiation period to 36–68 years. Being much less subject to time-dependent repair, PU based self-healing concrete has a 77–88% lower environmental impact than traditional (cracked) concrete.
Sustainability effects of including concrete cracking and healing in service life prediction for marine environments
With today’s focus on sustainable design, it is necessary to adequately predict and prolong service life of concrete in marine environments. By introducing self-healing properties, service life extension can be achieved. However, in prediction models, the required concrete mix specific input is usually not available. Moreover, little attention goes to the unavoidable presence of cracks. Finally, autonomous crack healing has almost never been taken into account. In this paper, the relevant model input was estimated from experimental chloride profiles. It enabled an adequate prediction of the chloride-induced steel depassivation period for cracked and uncracked 15% fly ash concrete (8–104 years, respectively). Comparison with self-healing by means of encapsulated polyurethane indicated a 48–76% self-healing efficiency. It could extend the corrosion initiation period to 36–68 years. Being much less subject to time-dependent repair, PU based self-healing concrete has a 77–88% lower environmental impact than traditional (cracked) concrete.
Sustainability effects of including concrete cracking and healing in service life prediction for marine environments
Van den Heede, Philip (Autor:in) / Van Belleghem, Bjorn (Autor:in) / De Keersmaecker, Michel (Autor:in) / Adriaens, Annemie (Autor:in) / De Belie, Nele (Autor:in) / Ghafoori, N / Claisse, P / Ganjian, E / Naik, TR
01.01.2016
Fourth International Conference on Sustainable Construction Materials and Technologie (SCMT4) ; ISBN: 978-1535383943
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
DDC:
690
British Library Online Contents | 2018
|British Library Online Contents | 2018
|British Library Online Contents | 2018
|