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Abstract

To study the evolution law of compressive strength, flexural strength, and erosion resistance of concrete under a corrosive environment, firstly, the corrosive environment was simulated with 3% Na2SO4 and NaCl solution, and then the performance change of concrete under the corrosive environment was analyzed by adding different contents of polypropylene fiber. The results show that: ① When the content of polypropylene fiber is 0–3%, the compressive strength and flexural strength of concrete gradually increase, and the maximum compressive strength and flexural strength of concrete in Na2SO4 and NaCl solutions are 50.2 MPa and 48.3 MPa, as well as 6.2 MPa and 5.8 MPa, respectively. When the content of polypropylene fiber is 3%–5%, the compressive strength and flexural strength of concrete gradually decrease. ② With the prolongation of corrosion time, the compressive strength and flexural strength of polypropylene fiber concrete decrease gradually. After 14 days of corrosion, the compressive strength and flexural strength of polypropylene fiber concrete in Na2SO4 and NaCl solutions are 45.3 MPa and 42.6 MPa, as well as 5.6 MPa and 4.9 MPa, respectively. ③ At 30 mm away from the surface, the SO24− concentration of concrete without fiber is 1.4%, and the Cl− concentration is 1.6%. The SO24− concentration of concrete with 3% polypropylene fiber is 1.1%, and Cl− concentration is 1.1%.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.038

First Page

202

Last Page

205

Submission Date

May 2025

Reference

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