Experimental study on the engineering characteristics of modified silt in the Yellow River alluvial plain

Gao, Qiang; Ge, Jun; Zhang, Jian; Ren, Zhe; Wu, Donghui; Cheng, Guangtan; Zhang, Kuo

doi:10.1016/j.conbuildmat.2023.132491

Cited by 2 publications

(1 citation statement)

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“…Silty soil is widely distributed in the alluvial plain of the Yellow River in Shandong Province, China. It is difficult for silty soil to meet the requirements for roadbed filling due to the loose structure of silt [1,2]. Generally, silty soil must be replaced [3,4].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Low-Cement-Content Silty Soil Stabilizer Using Industrial Solid Wastes

Li,

Ma,

Wang

et al. 2023

Applied Sciences

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Silty soil performs poorly when used in roads. Cement is generally used as a stabilizer to treat silty soil and enable it to meet the requirements for roadbed filling. However, cement is an environmentally unfriendly material and can cost much. Meanwhile, solid wastes of ground granulated blast furnace slag (GBFS), fly ash (FA), and flue gas desulfurized (FGD) gypsum are produced in large quantities annually. Therefore, stabilizer A (cement:ground GBFS:fly ash:FGD gypsum = 30:44:15:11) and stabilizer B (cement:ground GBFS:fly ash:FGD gypsum = 40:38:13:9) were investigated in this study by reducing the cement content in the stabilizer and improving the utilization rate of solid wastes. The compressive strength development, California bearing ratio (CBR), temperature shrinkage, mineral composition, and micro-morphology of the stabilized silty soil were measured. The main findings are as follows: firstly, the addition of solid wastes can mitigate the adverse effect of delay time on compressive strength development. Secondly, the proposed stabilizers can significantly improve the CBR, which can reach 60% with a 4% dosage. Additionally, Stabilizer B is believed to improve the resistance to temperature shrinkage, and a higher stabilizer dosage can reduce the rate of decrease in water stability coefficient. Both X-ray diffraction analysis and scanning electron microscope observations show that the main hydration products that contribute to the stabilization are C-S-H and ettringite.

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Section: Introductionmentioning

confidence: 99%