Experimental Study on Dynamic Resilient Modulus of Lime‐Treated Expansive Soil

Lü, Zheng; Zhao, Yang; Xian, Shaohua; Yao, Hailin

doi:10.1155/2020/3272681

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…The reduction is significant up to deviator stress of 41.4 kPa; beyond this the M R value is stable and reaches a constant value. This is attributed to the strain-softening behavior at low axial stress; similar observations were made by Atkinson [53], Zhang et al [54], Lu et al [55]. Strain-softening is due to load-induced damages on the structure of fine-grained soils when subjected to successive deviator stresses.…”

Section: Effect Of Lime-treatment and Fiber-reinforcement On Resilient Modulussupporting

confidence: 71%

Correlation-Based Studies on Resilient Modulus Values for Fiber-Reinforced Lime-Blended Clay

Al-Mahbashi

Al‐Shamrani

Moghal

et al. 2021

Int. J. of Geosynth. and Ground Eng.

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In the design protocols of pavement subgrade layers, the resilient modulus (M R ) property assumes importance in evaluating the performance during their life-time under sustainable repeated or dynamics traffic-loads. The aim of this study is to evaluate the improvements achieved on the subgrade layers of fiber-treated lime-blended expansive soil. Two types of fibers exhibiting different surface properties were considered and their length(s) and dosage(s) (by dry weight of soil) were varied as 6 mm and 12 mm; and 0.2% and 0.6%, respectively. To ensure bonding between fiber and soil particles, dehydrated lime has been added to the soil-fiber mixture. The compacted specimens were cured up to 28 days. Dynamic resilient modulus M R tests were carried out in the laboratory for soil-lime-fiber mixtures using dynamic triaxial device. The obtained M R values were correlated with California Bearing Ratio (CBR) and Unconfined Compression Strength (UCS) values and appropriate models have been proposed to estimate M R . The results show significant increments in M R due to fiber reinforcement and are affected by fiber type, length and dosage. The proposed models considering CBR and UCS to predict M R have shown excellent correlations.

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Section: Effect Of Lime-treatment and Fiber-reinforcement On Resilient Modulussupporting

confidence: 71%

Correlation-Based Studies on Resilient Modulus Values for Fiber-Reinforced Lime-Blended Clay

Al-Mahbashi

Al‐Shamrani

Moghal

et al. 2021

Int. J. of Geosynth. and Ground Eng.

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“…The static and dynamic elastic modulus test data of NFLS are fitted to establish the variation relationship of them, as shown in Figure 12. The static and dynamic elastic modulus of NLS, FLS, and NFLS conforms to the linear, exponential, and logarithmic relations respectively, and the fitting formula is shown in Equations ( 15)- (17). From the comparison of static and dynamic elastic modulus prediction models according to Figure 11, it can be found that the change trend between the static and dynamic elastic modulus of NFLS and the content of nano clay and polypropylene fiber is basically the same.…”

Section: Relationship Between Static and Dynamic Elastic Modulusmentioning

confidence: 68%

“…Lu et al [16] studied the effects of moisture content, compactness, cyclic deviatoric stress, and confining pressure on the dynamic elastic modulus of lime treated expansive soil by using dynamic triaxial test, and verified the applicability of UT Austin model. Zhao et al [17] measured the stress-strain curve of solidified soft soil under different lime content and confining pressure through dynamic triaxial test, and analyzed the relationship between dynamic and static strength and the influence of lime content on dynamic strength. Therefore, fiber materials and nano materials play a positive role in the mechanical properties of modified LS.…”

Section: Introductionmentioning

confidence: 99%

The Elastic Modulus and Damage Stress–Strain Model of Polypropylene Fiber and Nano Clay Modified Lime Treated Soil under Axial Load

et al. 2022

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Using polypropylene fiber (PPF) and nano clay modified lime treated soil (LS), the static and dynamic properties of fiber modified lime treated soil (FLS), nano clay modified lime treated soil (NLS), and fiber nano clay composite modified lime treated soil (NFLS) were studied. Through the unconfined compressive strength (UCS) test and dynamic triaxial test of FLS, NLS, and NFLS, the static and dynamic elastic modulus characteristics at 7 day curing age were explored, and the damage stress–strain model was established. The results show that: (1) Polypropylene fiber and nano clay can significantly enhance the mechanical properties of NFLS. Nano clay can promote the reaction between lime and soil to produce calcium silicate hydrate (C-S-H) and calcium aluminate hydrate (C-A-H), thus improving the strength of NFLS, and UCS can be increased by up to 103%. Polypropylene fiber can enhance the ductility of NFLS and increase the residual ductility strength, and the residual strength can be increased by 827%. (2) Nano clay can enhance the static and dynamic elastic modulus of modified lime treated soil. The static and dynamic elastic modulus of NLS, FLS, and NFLS are linear with the change of polypropylene fiber and nano clay content. The static and dynamic elastic modulus of NLS, FLS, and NFLS are linear, exponential, and logarithmic, respectively. (3) The mesoscopic random damage model can characterize the stress–strain relationship of NFLS. Polypropylene fiber and nano clay can improve the ductility and strength of modified LS, and the composite addition of polypropylene fiber and nano clay can improve the ability of modified LS to resist damage.

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“…Notably, previous studies indicate that the load response behavior of coarse and fine aggregates is stress-level dependent, suggesting the necessity of non-linear analysis for accurate pavement assessment [36][37][38][39][40][41][42]. Additional research underscores the influence of confining and deviatoric stress levels on the behavior of chemically stabilized soils [32,[43][44][45][46][47].…”

Section: Modeling and Non-linear Analysismentioning

confidence: 99%

Investigation of Subgrade Stabilization Life-Extending Benefits in Flexible Pavements Using a Non-Linear Mechanistic-Empirical Analysis

Ghanizadeh,

Salehi,

Mamou

et al. 2024

Infrastructures

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This paper investigates the effect of subgrade soil stabilization on the performance and life extension of flexible pavements. Several variables affecting soil stabilization were considered, including subgrade soil type (CL or CH), additive type and content (3, 6, and 9% of hydrated lime, 5, 10, and 15% of class C fly ash (CFA), and 5, 10, and 15% of cement kiln dust (CKD)), three stabilization thicknesses (15, 30, and 45 cm), and four pavement sections with varying thicknesses. The effects of these variables were investigated using four different damage mechanisms, including the fatigue life of the asphalt concrete (AC) and stabilized subgrade layers, the crushing life of the stabilized subgrade soil, and the rutting life of the pavement, using a non-linear mechanistic-empirical methodology. The results suggest that the optimum percentage that maximizes the pavement life occurs at 3% of lime for subgrade soil type CL, 6% of lime for subgrade type CH, and 15% of CFA and CKD for both subgrade soil types. The maximum pavement life increase occurred in the section with the lowest thickness and the highest stabilization thickness, which was 1890% for 3% of lime in the CL subgrade and 568% for 6% of lime in the CH subgrade. The maximum increase in the pavement life of subgrade stabilization with 15% of CFA was 2048% in a CL subgrade, and 397% in a CH subgrade, and life extension due to subgrade stabilization with 15% of CKD was 2323% in a CL subgrade and 797% in a CH subgrade.

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Experimental Study on Dynamic Resilient Modulus of Lime‐Treated Expansive Soil

Cited by 10 publications

References 35 publications

Correlation-Based Studies on Resilient Modulus Values for Fiber-Reinforced Lime-Blended Clay

Correlation-Based Studies on Resilient Modulus Values for Fiber-Reinforced Lime-Blended Clay

The Elastic Modulus and Damage Stress–Strain Model of Polypropylene Fiber and Nano Clay Modified Lime Treated Soil under Axial Load

Investigation of Subgrade Stabilization Life-Extending Benefits in Flexible Pavements Using a Non-Linear Mechanistic-Empirical Analysis

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