Environment·Health·Safety

Optimization of mechanical properties of basalt fiber reinforced phosphogypsum-based composites based on RSM

  • CUI Gengyin ,
  • XIE Lang ,
  • LU Yuexian ,
  • KONG Dewen ,
  • WANG Lingling
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  • 1.College of Civil Engineering,Guizhou University,Guiyang 550025,China
    2.Guizhou Provincial Key Laboratory of Rock and;Soil Mechanics and Engineering Safety,Guiyang 550025,China
    3.Zunyi Tobacco Monopoly Bureau,Zunyi 563099,China

Received date: 2022-11-18

  Online published: 2023-08-25

Abstract

In order to explore the influence mechanism of basalt fiber diameter,length,dosage and their interaction on the mechanical properties of phosphogypsum-based composites(PGCs),and to realize its multi-objective optimization,a test was designed by Box-Behnken response surface methodology(RSM),meanwhile,polynomial regression models of 28 d compressive and flexural strength of composites were established.The results showed that the fiber dosage had the most significant influence on the mechanical properties of the composites,and the interaction between the diameter and length was the key factor affecting the compressive strength,while the interaction of the length and dosage was the key factor affecting their flexural strength,which was due to the different stress characteristics of the matrix in the process of compression and bending,as well as the various stress effects of the fibers in it under different parameters.The optimal conditions were obtained by optimizing the fiber parameters:fiber diameter of 13 μm,length of 9.439 mm,and fiber mass fraction of 1.023%.Under these conditions,the compressive and flexural strengths of the composites were 31.878 MPa and 6.347 MPa,respectively.The relative errors of the model validation experiments were 2.02% and 5.09%,respectively.The model showed a high accuracy and good fitting effect,indicating that RSM could be used to predict the strength and optimize the fiber parameters of fiber reinforced gypsum-based composites.

Cite this article

CUI Gengyin , XIE Lang , LU Yuexian , KONG Dewen , WANG Lingling . Optimization of mechanical properties of basalt fiber reinforced phosphogypsum-based composites based on RSM[J]. Inorganic Chemicals Industry, 2023 , 55(8) : 116 -123 . DOI: 10.19964/j.issn.1006-4990.2022-0622

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