Abstract
In this paper, a new composite system for concrete structures, i.e. inorganic polymer concrete column (IPCC) reinforced with basalt FRP bars, which combines the outstanding features of inorganic polymer concrete (IPC) and basalt reinforcement such as good corrosion resistance and fire resistance was proposed. The inorganic polymer binder was made of industrial by-products including fly ash and ground granulated blast-furnace slag, and alkaline activating solution. The mechanical behaviour of short IPCC under eccentric compression was experimentally investigated and compared with control steel-reinforced ordinary Portland cement concrete columns (OPCC). The effect of eccentricity on overall failure mode and load–displacement/strain response of the specimens was studied. Results indicate that the load-carrying capacity of IPCC was approximately 30% lower than that of OPCC, while the ultimate displacements of IPCC were 65% and 15% larger than those of OPCC under large and small eccentricities, respectively. The IPCC specimens had almost similar overall load–displacement/strain response as the OPCC specimens up to the final failure. The ultimate longitudinal strains on the compression face of IPCC under large and small eccentricities were one time and 22% larger than those of OPCC respectively due to the relatively lower strength of IPC than ordinary concrete. In addition, the sine-shaped model can be used for IPCC to predict the lateral deformation along the column length at various load levels until final failure.
Highlights
Concrete is the most widely used construction material in the world
The average maximum strains of the reinforcement on the tension face of inorganic polymer concrete columns (IPCC) and ordinary Portland cement concrete columns (OPCC), i.e., inorganic polymer concrete columns with small eccentricity (IPCC-SE) distal reinforcement (DR) III and ordinary plain concrete columns with small eccentricity (OPCC-SE) DR III, were equal to 1087 mε and 638 mε, respectively, which indicates that the maximum strain of basalt rebar in IPCC was approximately 1.7 times that of steel rebar in OPCC
An experimental study was carried out to investigate the mechanical behaviour of inorganic polymer concrete columns (IPCC) reinforced with basalt rebar under eccentric compression
Summary
Concrete is the most widely used construction material in the world. Ordinary Portland cement (OPC) has traditionally been used as the binding material in concrete. The existing analytical expressions for bond strength of OPC concrete can be used for predicting bond strength of steel-reinforced geopolymer concrete These existing findings lead to the idea in this study of combing basalt rebar and IPC (i.e., geopolymer concrete) in a composite system to improve the durability and sustainability of concrete structures. For the first time, the mechanical behaviour of inorganic polymer concrete columns (IPCC) reinforced with basalt rebar under eccentric compression is investigated and compared with control steel-reinforced ordinary Portland cement concrete columns (OPCC). It extends a recently published work by Fan and Zhang [26] from beams to columns. The effect of eccentricity on overall failure mode and loadedisplacement/strain behaviours of the specimens is studied and analysed in detail in order to gain a comprehensive understanding of the failure mechanisms of such new composite system, i.e., IPC columns reinforced with basalt rebar, subjected to eccentric compression loads
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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 call
