Combined Influences of Cement, Rice Husk Ash and Fibre on the Mechanical Characteristics of a Calcareous Sand

Tavakol, Kamran; Bayat, Meysam; Nadi, Bahram; Ajalloeian, Rassoul

doi:10.1007/s12205-023-0695-7

Cited by 5 publications

(1 citation statement)

References 63 publications

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“…R. Subalakshmi et al [ 32 ] research shows that foam concrete utilized in GFRG panels has desirable strength, making it a suitable alternative construction material for the industrialized building system. Kamran tavakol et al [ 33 ] conducted a series of direct shear tests to evaluate the effects of cement, rice husk ash, polypropylene fiber and relative density on the mechanical properties of calcareous sand. Seyed Hadi Sahlabadi et al [ 34 ] research shows that the strength of the PPF-reinforced specimens is significantly more than that of BF-reinforced ones.…”

Section: Introductionmentioning

confidence: 99%

Study on triaxial compression performance and damage characteristics of fiber-reinforced ecological matrix cementing gangue gypsum fill material

Jiang,

Yin,

Yin

et al. 2024

PLoS ONE

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Polypropylene fiber was equally mixed into alkali-activated slag fly ash geopolymer in order to ensure the filling effect of mine goaf and improve the stability of cemented gangue paste filling material with ecological matrix. Triaxial compression tests were then conducted under various conditions. The mechanical properties and damage characteristics of composite paste filling materials are studied, and the damage evolution model of paste filling materials under triaxial compression is established, based on the deviatoric stress-strain curve generated by the progressive failure behavior of samples. Internal physical and chemical mechanisms of the evolution of structure and characteristics are elucidated and comprehended via the use of SEM-EDS and XRD micro-techniques. The results show that the fiber can effectively improve the ultimate strength and the corresponding effective stress strength index of the sample within the scope of the experimental study. The best strengthening effect is achieved when the amount of NaOH is 3% of the mass of the solid material, the amount of fiber is 5‰ of the mass of the solid material, and the length of the fiber is about 12 mm. The action mode of the fiber in the sample is mainly divided into single-grip anchoring and three-dimensional mesh traction. As the crack initiates and develops, connection occurs in the matrix, where the fiber has an obvious interference and retardation effect on the crack propagation, thereby transforming the brittle failure into a ductile failure and consequently improving the fracture properties of the ecological cementitious coal gangue matrix. The theoretical damage evolution model of a segmented filling body is constructed by taking the initial compaction stage end point as the critical point, and the curve of the damage evolution model of the specimen under different conditions is obtained. The theoretical model is verified by the results from the triaxial compression test. We concluded that the experimental curve is in good agreement with the theoretical curve. Therefore, the established theoretical model has a certain reference value for the analysis and evaluation of the mechanical properties of paste filling materials. The research results can improve the utilization rate of solid waste resources.

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Section: Introductionmentioning

confidence: 99%