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Wednesday, 17 July 2019
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Raw materials & technologies, Raw materials, Coatings additives

Microcapsule is designed for self-healing in concrete environment

Tuesday, 25 February 2014

Based on microcapsule technology, a new type of self-healing system for concrete materials was created, which mainly focuses on the corrosion protection of steel bars.

In a paper, researchers from Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, China, characterized the performance of the system by means of the electrochemical impedance spectroscopy (EIS) of steel bar immersed in a simulated concrete environment.

Microcapsule protects against steel bar corrosion

The experimental results demonstrate strong inhibition of chloride-induced corrosion when microcapsules are added to the water solution with sodium chloride by different mass fractions. A novel equivalent circuit model, which takes into account the inductive effect arising from the generation of corrosion products on the steel bar surface, is proposed to explain the protection performance of the microcapsules against the corrosion of a steel rebar in a concrete.

The study is published in: Construction and Building Materials, Volume 56, April 2014, p. 1-6

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