Steel Corrosion Evaluation of Basalt Fiber RPC Affected by Crack and Steel-Concrete Interface Damage Using Electrochemical Methods

Abstract

Basalt fiber (BF) is a new anti-corrosion and environmentally friendly material, which is expected to delay the corrosion process of steel bars and improve the durability of reinforced reactive powder concrete (RPC). The electrochemical method is a nondestructive testing and real-time monitoring technique used to characterize the corrosion behaviors of steel bars embedded in concrete structures. In this paper, the electrochemical technique was employed to evaluate the corrosion of steel bars embedded in basalt fiber modified reactive powder concrete (BFRPC). Besides, crack and steel-concrete interface damage (SCID) were considered as typical factors that affect steel corrosion in concrete. Thus, both reinforced fiber-free RPC and BFRPC specimens with crack and SCID were prepared for evaluating the steel corrosion behaviors by electrochemical methods. The results revealed that both crack and SCID would aggravate the steel corrosion, and the crack was the major factor that affects the corrosion process. Moreover, the excellent compactness of BFRPC and the bridging action of BF could effectively prevent the concrete cracking and steel corrosion process of concrete. Using reinforced BFRPC instead of ordinary concrete in practical projects could greatly extend the service life of steel bars.

Failure analysis of glass fiber and basalt fiber reinforced polymer composites under an extreme environment with high‐temperature, high‐pressure and H2S/CO2 exposure

“…The flexural modulus of BFRP‐72 was 946 MPa, nearly 50% higher than that of GFRP‐72. It may be because the degraded BFRP has higher interfacial properties than GFRP 32 . It suggests that BFRP had better degradation resistance than GFRP in a simulated oil field environment.…”

Flexural Strength and Acoustic Damage Characteristics of Steel Bar Reactive Powder Concrete

“…HPWR-Q8011 superplasticizer was used to improve concrete workability, for which the water reduction rate was about 25%. The properties of chopped basalt fiber, as a reinforcement material, are presented in the previous study [24]. Type HPB300 rebar (diameter: 8 mm, length 380 mm) was used for concretes, the tensile strength of rebar was 445 MPa, and its yield strength was 335 MPa.…”

Cracking characteristics evaluation for reinforcement basalt fiber reactive powder concrete beam using acoustic emission

“…Another reason is that basalt fiber has superior mechanical properties and has good resistance to all kinds of acid and alkaline conditions (Lou et al, 2021;Si et al, 2021). Basalt fiber improves the mechanical properties and durability of RPC (Liu et al, 2020a;Liu et al, 2020b). Based on these obvious advantages, BFRPC has been considered suitable for concrete beam structural materials.…”