Carbon fiber reinforced concrete as an intrinsically smart concrete for damage assessment during static and dynamic loading

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Title:	Carbon fiber reinforced concrete as an intrinsically smart concrete for damage assessment during static and dynamic loading
Authors:	Chen, Pu-woei;Chung, D. D. L.
Contributors:	淡江大學航空太空工程學系
Keywords:	carbon;concretes;damage;dynamic loads;electrical resis-tance;fibers
Date:	1996-07
Issue Date:	2013-05-30 15:26:47 (UTC+8)
Publisher:	Farmington Hills: American Concrete Institute
Abstract:	Concrete containing short carbon fibers (in amounts as small as 0.2 volume- percent) was found to be an intrinsically smart concrete that can sense elastic deformation, inelastic deformation, and fracture. The signal provided is the change in electrical resistance, which is reversible for elastic deformation and irreversible for inelastic deformation and fracture. The presence of electrically conducting short fibers is necessary for the concrete to sense elastic or inelastic deformation, but the sensing of fracture does not require fibers. The fibers serve to bridge the cracks and provide a conduction path. The resistance increase is due to conducting fiber pullout in the elastic regime, conducting fiber breakage in the inelastic regime, and crack propagation at fracture. Applications include real-time damage assessment and dynamic load monitoring.
Relation:	ACI Materials Journal 93(4), pp.341-350
Appears in Collections:	[Graduate Institute & Department of Aerospace Engineering] Journal Article

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