Abstract
The purpose of this paper is to determine the influence of the lightweight porous perlite aggregate and two widely used types of fibres on the physical and mechanical properties, frost durability and microstructure of self-compacting lightweight concrete (SCLC). The experimental investigation consisted of tests carried out on cubes and prismatic samples made of SCLC and fibres-reinforced SCLC with variable content ranging from 0.5 to 1% of basalt fibres (BF) and/or 0.5% of steel fibres (SF). In this study, two variable contents of fine perlite aggregate were used: 5% and 15%. The workability (the slump-flow and t500 values) in fresh state SCLCs have been done. Extensive data on compressive and flexural tensile strength in bending behaviour, frost resistance and the microstructure including interfacial transition zone (ITZ) were recorded and analysed. The hybrid fibres-reinforced SCLC with perlite aggregate showed a more ductile behaviour compared to that of SCLC without fibres. Fibres bridge cracks during flexural tensile strength test. BF successfully protected porous SCLC against frost attack, whereas SF succumbed to damage.
Highlights
In recent years, there has been a growing interest in self-compacting concrete (SCC), as shown by an increasing number of studies on this topic [1,2,3,4,5]
The slump-flow test, time of distributionand t500, mixture stability assessment according to Visual Stability Index (VSI) and thewere air content intomixtures were
The research on the prospective application of Steel fibres (SF) and basalt fibres (BF) and perlite aggregate proved that they can be successfully utilised for the production of building materials such as self-compacting lightweight concrete (SCLC)
Summary
There has been a growing interest in self-compacting concrete (SCC), as shown by an increasing number of studies on this topic [1,2,3,4,5]. SCC is characterised by a high resistance to segregation and high flowability, enabling it to fill the mould and encapsulate the reinforcing elements entirely, without mechanical compaction [4,6,7]. A self-compacting concrete mixture should be characterised by a relatively low yield strength, average viscosity providing appropriate resistance to segregation and bleeding, as well as sufficiently stable workability during transportation and concreting. In comparison with normal concrete, SCC exhibits numerous advantages, including reduction of the construction time, labour, equipment use and noise at construction sites, because the need for mixture vibration is eliminated [8].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
