Influence Factor Analysis on Strength of Lime-Fly Ash Loess

Zhang, Yufen; Zhang, Zhiquan

doi:10.4236/eng.2013.56068

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…It can be seen that for a certain slag content, UCS increases with the density or curing time. Linear relationships between UCS and slag content could be obtained for all curing times investigated in this study, which was in consistency with previous findings [27,31,[50][51][52]. In addition, the early strength of lime-slag stabilized loess was significantly increased compared to previous research results [53] on lime stabilized soil.…”

Section: Effect Of the Slag Content L/s Ratio And Porositysupporting

confidence: 92%

Evaluation on Strength Properties of Lime–Slag Stabilized Loess as Pavement Base Material

et al. 2019

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This study aimed to investigate the feasibility of using lime–slag stabilized loess as base-course material by assessing its unconfined compressive strength (UCS). Loess stabilized with various mix ratios were compacted and cured to three, five, seven, and 28 days, respectively, for further strength tests. The effects of binder content, lime-to-slag (L/S) ratio, porosity, and curing time on the UCS of stabilized loess were addressed in detail. The test results show that UCS increases with the increase in binder content or curing time, and it gains strength rapidly within the first seven days of curing. At the same binder content, UCS decreases with the decrease in L/S ratio or porosity. Finally, the correlations of UCS with binder content, porosity, and curing time were derived, which exhibited reasonable correlation coefficients R2 (from 0.86 to 0.97).

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Section: Effect Of the Slag Content L/s Ratio And Porositysupporting

confidence: 92%

Evaluation on Strength Properties of Lime–Slag Stabilized Loess as Pavement Base Material

et al. 2019

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“…17. [52][53][54][55][56][57][58]. These compounds create a cement structure within the soil, forming a cement-soil skeleton that prevents particles from easily sliding relative to each other and thus increasing inter-particle friction.…”

Section: Discussionmentioning

confidence: 99%

Laboratory Tests and Numerical Simulation on the Loess Subgrade Improved by Lime-Lignin

Jia,

Zhang,

et al. 2023

Preprint

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Conventional techniques individually incorporating the inorganic or organic modifiers are insufficient to achieve the amelioration of loess roadbed in practices, which has restricted the development of infrastructures. This paper utilizes the lime-lignin to modify the loess, for which a series of mixing samples with various additives dosages (i.e. 0,2%:1%,4%:2%,6%:3% and 8%:4%) was adopted. Laboratory experiments and numerical simulation were carried out to investigate the mechanical properties of amended loess. Test results showed that both the compressive and shear strengths of the improved loess exhibit an initial rise followed by a decline as the contents of lime and lignin increase, with the optimal improvement effect achieved at a lime-to-lignin mixing content of 2%:1%. The results also indicated that numerical simulation can well corroborate the laboratory results, which are manifested in reduced roadbed settlements and favourable stress transfer mechanisms. An intricate three-dimensional network structure established by lignin fibers and a cement-soil skeleton formed between lime hydrate and soil particles jointly improve the strength of the soil matrix. The main research findings can offer valuable theoretical references for the enhancement of the loess subgrade.

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“…Lime is a very cheap material and widely used to stabilize the loess, and this method has been used for more than thousand years. Recently, many scholars have studied the mechanism of stabilizing soil and the micro-reaction mechanism between lime and soil [1,2], and some important achievements have been obtained. Some works were also done with the strength increasing process and discipline of loess or clay [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Test Study on Strength and Permeability Properties of Lime-Fly Ash Loess under Freeze-Thaw Cycles

Zhang¹,

Zhang²

2014

TOCIEJ

Self Cite

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Abstract:In order to study the application of lime-fly ash loess in permafrost subgrade engineering, uniaxial compressive test, fast direct shearing test and permeability tests were carried out on lime-fly ash loess under different curing ages and freeze-thaw cycles. Uniaxial compressive strength of lime-fly ash loess increases slowly with the curing ages, and can reach 3.5 Mpa after the curing ages of 90 days (This strength is called 90d strength). 14d strength of lime-fly ash loess has already reached 50% of 90d strength; later strength including 28d strength and 90d strength is basically stable under different freeze-thaw cycles, so lime-fly ash loess has good water stability and freeze-thaw stability. Fast direct shear strength decreases with the number of freeze-thaw cycles without consideration of moisture content; the coefficient of permeability increases with the number of freeze-thaw cycles．All test data show that lime-fly ash loess with good behaviors can be applied in permafrost subgrade engineering.

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Influence Factor Analysis on Strength of Lime-Fly Ash Loess

Cited by 6 publications

References 3 publications

Evaluation on Strength Properties of Lime–Slag Stabilized Loess as Pavement Base Material

Evaluation on Strength Properties of Lime–Slag Stabilized Loess as Pavement Base Material

Laboratory Tests and Numerical Simulation on the Loess Subgrade Improved by Lime-Lignin

Test Study on Strength and Permeability Properties of Lime-Fly Ash Loess under Freeze-Thaw Cycles

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