Hydrophobic and superhydrophobic strain-hardening cement-based composites

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Abstract

Strain hardening cement-based composites (SHCC) can be a good candidate for use in critical infrastructure elements that require extended lifetimes. The use of hydrophobic or superhydrophobic (HSH) admixtures that are intended to generate air voids whose size and distribution can be tailored can enhance the performance of SHCC. These composites consist of fine grained cementitious matrix and typically 2% by volume of polymeric fiber reinforcement. Under tensile loading, they exhibit a pronounced ductility resulting from formation of fine multiple cracks. They also demonstrate an increase in load carrying capacity accompanied by a large deformation due to extensive multiple cracking. Superhydrophobic hybridization engages interdisciplinary work combining biomimetics, chemistry and nanotechnology to resolve fundamental problems with concrete, such as insufficient durability and corrosion resistance. When these materials are combined with fiber reinforcement, cracks within the cementitious materials are restrained to small sizes, which is expected to result in less water absorption and superior durability.

Details

Original languageEnglish
Pages48-56
Number of pages9
Volume82
Issue number6
JournalBetonwerk und Fertigteil-Technik/Concrete Plant and Precast Technology
Publication statusPublished - 2016
Peer-reviewedYes
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