Water permeability of cracked strain-hardening cement-based composites. (September 2017)

• Record Type: Journal Article
• Authors: Wagner, Christian; Villmann, Beate; Slowik, Volker; Mechtcherine, Viktor
• Is Part Of: Cement & concrete composites. Volume 82(2017)
• Page Start: 234
• Page End: 241
• Publication Date: 2017-09
• Subjects: SHCC -- Strain hardening -- Crack pattern -- Water permeability; Composite-reinforced concrete -- Periodicals; Concrete -- Periodicals; Composite materials -- Periodicals; Composites de ciment -- Périodiques; Béton -- Périodiques; Composites -- Périodiques; Béton léger -- Périodiques; Cement composites; Composite materials; Composite-reinforced concrete; Concrete; Lightweight concrete; Periodicals; Electronic journals; 620.135
• DOI: 10.1016/j.cemconcomp.2017.06.003
• Languages: English
• ISSNs: 0958-9465

Abstract

Abstract: Strain-hardening cement-based composites (SHCC) are characterized by the formation of numerous fine cracks under tensile loading. The water permeability of the cracked material and, consequently, the durability of respective structural members will strongly depend on these cracks. Experimental investigations into the water permeability of both SHCC specimens pre-cracked under uniaxial tension and SHCC overlays on cracked concrete substrate were performed. It is proposed to determine certain crack pattern parameters which may be linked to the theoretical water permeability of the cracked material. For this linking, a weighting function for the observed crack widths has been derived on the basis of the Hagen-Poiseuille equation.