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- W4323871306 endingPage "130902" @default.
- W4323871306 startingPage "130902" @default.
- W4323871306 abstract "Ground granulated blast furnace slag (GGBS) and waste gypsum are cost-effective and environment-friendly substitute materials for Portland cement. This work aims to investigate and optimize the synergy of ordinary Portland cement (OPC), GGBS, and phosphogypsum (PG) in solidifying marine soft clay. The soft clay is treated with the ternary blending designed, and NaOH (NH), Na2SO4 (NS), calcium aluminate cement (CA), and γ-nano-Al2O3 (NA) are used as additives to it. The effectiveness of the ternary blending and the additives is evaluated using unconfined compressive strength (UCS), consolidation, and durability tests, and the associated mechanisms are revealed by pH evaluation, X-ray diffraction (XRD), and scanning electron microscopy (SEM) tests. A high-efficiency ternary cement (TC) is developed by blending OPC, GGBS, and PG in the optimum ratio of 5:3:2. TC solidified clay (TCSC) exhibits better strength performance than cement or binary cement (OPC–GGBS/PG) solidified clay, due to the combined action of pozzolanic reaction and ettringite formation. The single additives, particularly NH and NS, can dramatically improve the early strength of TCSC, whereas the composite additives NS/CA and NS/NA finally result in greater strength gains. Besides, the lower compressibility and stronger sulfate resistance also verify TCSC as a preferable reinforced material over cement solidified clay, and these mechanical properties can be further improved using the composite additives. The increased basicity and the more effective role of ettringite explain the improved mechanical performance. In particular, the NS/CA and the NS/NA induce ettringite to grow in clustered and oriented patterns, providing effective pore filling and structural support, respectively." @default.
- W4323871306 created "2023-03-11" @default.
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- W4323871306 date "2023-04-01" @default.
- W4323871306 modified "2023-09-30" @default.
- W4323871306 title "Optimization of synergy between cement, slag, and phosphogypsum for marine soft clay solidification" @default.
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- W4323871306 doi "https://doi.org/10.1016/j.conbuildmat.2023.130902" @default.
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