Analysis of the mechanical properties and prediction of damage life for GBFS-HPMC/fibre pervious concrete after seawater erosion

Abstract

Pervious concrete has been used in coastal structures to erosion seawater. Based on the orthogonal test method, the effects of granulated blast furnace slag (GBFS), hydroxypropyl methylcellulose (HPMC), and polypropylene plastisol textile fibre (PPTF) on the performance of permeable concrete after seawater erosion were investigated ; the results showed the following: After 30, 60, and 90 d of seawater erosion, the optimal additions of GBFS, HPMC, and PPTF were (15%, 0.15%, 0.5%), (20%, 0.15%, 0.5%), and (20%, 0.15%, 0.5%) respectively. Compared with C-0, the mass loss rate and strength loss rate were reduced by up to 61.60% and 63.93%, respectively, and the relative kinetic–elastic modulus was increased by up to 11.14%. Micromorphology revealed that the proper mixing of slag, cellulose, and plastic fibre significantly improves the structure's stability. Finally, using the relative kinetic–elastic modulus for Weibull and NSGM(1,N) models predictions provides more accurate results.

KEYWORDS:

• Pervious concrete
• seawater erosion
• micromorphology
• Weibull model
• NSGM(1,N) model

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Additional information

Funding

This work was supported by Research and Development of Key Technology and Engineering Application of Hydraulic Ductile Concrete: [grant no XBY-PTKJ-2022-12]; Research on Mechanical Properties and Durability of Fiber Reinforced Seawater Sea Sand Concrete Members in Harsh Environments: [grant no LJKMZ20220979].