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- W3001911335 abstract "This paper proposed a novel dual rotation slaking test with minimum mechanical and artificial disturbance that can better correlate slaking characteristics. The robustness of the proposed method was validated through a comparison of the results of the proposed test with those of the standard slake durability test. Theoretical analysis was conducted to reveal the micro-mechanism of the air-breakage phenomenon of red stratum sandstone from the perspective of surface tension, then the possibility of employing surfactant as a restrainer to retard slaking was proposed. Finally, the dual rotation slaking test was employed to evaluate the effect of various chemical additives in the slaking fluid on the durability of the red stratum sandstone. Test results showed that the surfactant sodium dodecyl sulphate (SDS) could retard deterioration by reducing the air-breakage phenomenon at its critical micelle concentration (CMC, 0.05 mol/L). Sodium chloride (NaCl) and magnesium chloride (MgCl2) can inhibit mineral dissolution through the common ion effect. The precipitation generated by sodium carbonate (Na2CO3) and potassium carbonate (K2CO3) acts as cement, increasing the durability of the red stratum sandstone. However, acidic agents generated by the hydrolysis of Al2(SO4)3 make the minerals highly susceptible to be attacked, and the significant volumetric expansion of the precipitated calcium sulphate (CaSO4) in sodium sulphate (Na2SO4) solution can contribute to the breakdown of the red stratum sandstone." @default.
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- W3001911335 date "2020-03-01" @default.
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- W3001911335 title "Assessing the slake durability of red stratum sandstone in different solution environments by a novel dual rotation test" @default.
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- W3001911335 doi "https://doi.org/10.1016/j.enggeo.2020.105503" @default.
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