Abstract
The paper focuses on the evaluation of chloride ion diffusion coefficient of self-compacting concrete with steel fibre reinforcement. The reference concrete from Ordinary Portland Cement (OPC) and Self-Compacting Concrete (SCC) with several values of added steel fibres—0%, 1% and 2% of weight—were cast in order to investigate the effect of fibres. The three procedures of diffusion coefficient calculation are presented—rapid chloride penetration test, accelerated penetration tests with chloride as well as the surface measurement of electrical resistivity using Wenner probe. The resulting diffusion coefficients obtained by all methods are compared and evaluated regarding the basic mechanical properties of concrete mixtures.
Highlights
Self-compacting concrete (SCC) [1,2] allows the simplification of concrete processing technology and the production of complex cross-sections and structural shapes
Improved properties are achieved by modification of the formula, i.e., by appropriate use of aggregate, cement content and plasticizers [1]. Another rapidly growing area of concrete technology is steel fibre reinforced self-compacting concrete (SCC-SFR), which is classified within the group of composites that combine conventional typical structural concrete and fibres [15,16,17]
It should be noted that the values of the diffusion coefficient from resistivity are based on measurement at 28 days, from RCPT are based on measurement at 56 days, and from chloride profile, approximately 118 days
Summary
Self-compacting concrete (SCC) [1,2] allows the simplification of concrete processing technology and the production of complex cross-sections and structural shapes. Improved properties are achieved by modification of the formula, i.e., by appropriate use of aggregate, cement content and plasticizers [1] Another rapidly growing area of concrete technology is steel fibre reinforced self-compacting concrete (SCC-SFR), which is classified within the group of composites that combine conventional typical structural concrete and fibres [15,16,17]. The most demanding use is in the latter group, where it is necessary to find a suitable design procedure while providing enough reliability and safety of the structure These may be for instance cases of lightweight structural elements where fibres are to eliminate shear destruction/failure. 1%, and due to compacting concrete with steel fibre reinforcement with a of fibre of2% Their use in the field of reinforced concrete structures exposed to chlorides, where it is necessary to. Penetration tests with chloride [30]
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