Volume 25 Issue 6
Dec.  2025
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QU Guang-lei, LIU Zhen-shuang, LIU Gao-peng, ZHENG Mu-lian, TANG De. Material optimization and cross-scale enhancement mechanism of porous concrete based on response surface method[J]. Journal of Traffic and Transportation Engineering, 2025, 25(6): 36-50. doi: 10.19818/j.cnki.1671-1637.2025.06.004
Citation: QU Guang-lei, LIU Zhen-shuang, LIU Gao-peng, ZHENG Mu-lian, TANG De. Material optimization and cross-scale enhancement mechanism of porous concrete based on response surface method[J]. Journal of Traffic and Transportation Engineering, 2025, 25(6): 36-50. doi: 10.19818/j.cnki.1671-1637.2025.06.004

Material optimization and cross-scale enhancement mechanism of porous concrete based on response surface method

doi: 10.19818/j.cnki.1671-1637.2025.06.004
Funds:

National Natural Science Foundation of China 52378430

National Natural Science Foundation of China 52078051

Transportation Science and Technology Project of Shandong Province HS2022B073

More Information
  • Corresponding author: ZHENG Mu-lian (1977-), female, professor, PhD, zhengmulian@163.com
  • Received Date: 2024-12-05
  • Accepted Date: 2025-06-06
  • Rev Recd Date: 2025-05-01
  • Publish Date: 2025-12-28
  • To enhance the mechanical properties and durability of porous concrete (PC), the enhancement effect of basalt fiber (BF), nano-SiO2 (NS), and nano-CaCO3 (NC) on PC was systematically investigated. The appropriate dosage ranges of the three enhancement materials were determined through the single-factor test. Based on response surface method (RSM), with the dosages of these materials as variables, and the permeability coefficient, compressive strength, and flexural strength of PC as response objectives, an experiment was designed, and a regression model was established. The interaction effect of the three enhancement materials was studied using statistical analysis and model optimization, with the optimal dosages determined via desirability function. Further, the cross-scale synergistic enhancement mechanism was revealed through a comparative analysis of macroscopic performance and microscopic structure. Analysis results indicate that individual incorporation of BF, NS, and NC can enhance the compressive strength and permeability coefficient of PC within a certain range. The effect of the three enhancement materials is not merely a simple linear combination, but exhibits significant interactions. The optimal volume fraction of BF optimized by RSM is 0.34%, and the optimal mass fractions of NS and NC are 0.38% and 0.47%, respectively. Compared to the unenhanced PC, the optimized one is 72.9%, 63.6%, and 96.6% higher in permeability coefficient, compressive strength, and flexural strength, respectively, with excellent freeze-thaw resistance. BF primarily enhances the toughness of PC through the 'bridging' effect at the mesoscopic scale, while NS and NC promote the formation of hydration products and improve the density of the matrix and interfacial transition zone through pozzolanic, nucleation, and filling effects at the microscopic scale, thereby enhancing the mechanical properties and durability of PC. Optimized design of fiber-activated nanomaterials based on RSM can significantly enhance the overall performance of PC and provide a theoretical basis and experimental foundation for its performance optimization and engineering applications.

     

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