Study on microstructure, mechanical properties and chloride ion binding of sea sand reactive powder concrete by multi-mineral admixture system

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-03 DOI:10.1016/j.powtec.2025.120738

Lincai Ge , Haitao Li , Xin Xue , Shuai Liu

引用次数: 0

Abstract

In order to study the effects of silica fume, S105 slag powder, and fly ash on the mechanical properties, workability, and chloride ion binding effect of sea sand reactive powder concrete (SSRPC) with different contents and combination systems, scanning electron microscopy (SEM), X-diffraction analysis (XRD), and nuclear magnetic resonance (NMR) techniques were used to investigate the mechanical properties and chloride ion binding mechanism. The results showed that at 90 days, the mechanical properties of M-GFS4 in the three-doped system were optimal, and the compressive strength increased by 5.15 %, 1.65 %, and 2.66 %, and the splitting tensile strength increased by 14.81 %, 6.89 %, and 8.86 %, respectively, compared with those of M-S, M-FS, and M-GS. With the incorporation of fly ash or slag powder, the free chloride ion in the matrix gradually decreased and the binding ratio gradually increased. At the late stage of hydration, Friedel's salt gradually decomposed.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.