Mechanical Properties and Enhancement Mechanism of Oil-Well Cement Stone Reinforced with Carbon Fiber Surfaces Treated by Concentrated Nitric Acid and Sodium Hypochlorite

Figure 3

Compressive strength and tensile strength of cement stone.

(a) Tensile strength of pure cement stone and untreated CF-reinforced cement stone

(b) Compressive strength of pure cement stone and untreated CF-reinforced cement stone

(c) Tensile strength of pure cement stone and CF-reinforced cement stone added with sodium hypochlorite

(d) Compressive strength of pure cement stone and CF-reinforced cement stone treated with sodium hypochlorite

(e) Tensile strength of pure cement stone and CF-cement-reinforced stone treated with concentrated nitric acid

(f) Compressive strength of pure cement stone and CF-reinforced cement stone treated with concentrated nitric acid