Abstract
The workability and mechanical properties of basalt fiber reactive powder concrete (BFRPC) were investigated by univariate analysis. The acoustic emission (AE) was used as a non-destructive technique to reveal the damage characterization of concrete samples of varying basalt fiber content. The fracture stages and modes of specimens during flexural test were determined by AE parameters. The content of silica fume, quartz sand and basalt fiber of 0.4, 1.3 and 10 kg/m3, respectively, was found related to optimal improvements in mechanical strength. As for the characteristics of fracture, it was found that the fiber content was a significant determinant, and the key AE parameters, namely, hits, energy and amplitude, were found related to the damage stage of specimens. Furthermore, rise time (RA) and average frequency (AF) were found to have opposite trends during loading while their variation related to the fracture modes of BFRPC.
Highlights
The concept of ultra-high performance concrete (UHPC) appeared in the 1990s [1], and one of the most widely used is Reactive Powder Concrete (RPC)
The production cost of RPC is generally high, its ultra-high mechanical properties make it possible to reduce the thickness of concrete members, which results in reducing material consumption
The acoustic emission (AE) data for the three groups BF9, BF8, and BF5 were selected for for analysis to study the characteristics of basalt fiber reactive powder concrete (BFRPC) fracture process with different basalt fiber content
Summary
The concept of ultra-high performance concrete (UHPC) appeared in the 1990s [1], and one of the most widely used is Reactive Powder Concrete (RPC). Traditional RPC improves the homogeneity and compactness of the matrix by eliminating coarse aggregate and adding active constituents such as silica fume and fly ash [4] This ultra-compact microstructure results in low permeability and high durability. The production cost of RPC is generally high, its ultra-high mechanical properties make it possible to reduce the thickness of concrete members, which results in reducing material consumption. It has economic advantages in practical application. Basalt fiber has been used for many years as a reinforcing material in concrete technology. The characteristic parameters of AE signals could act as a forerunner of damage, which verified the applicability of AE method in high-performance material structure
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
