Mechanical properties of soil reinforced with both lime and four kinds of fiber

Li, Wei; Chai, Shou Xi; Zhang, Huyuan; Shi, Qian

doi:10.1016/j.conbuildmat.2018.03.248

Cited by 127 publications

(33 citation statements)

References 23 publications

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“…As a result, the strength of the mixture increases to the maximum. [38] It is noticeable that the addition of fiber has greatly improved the strength of the sand, as it reached the peak strength of 165 kPafor a fiber content of 0.75%.Besides, displacement curves of unreinforced and reinforced medium sand specimens have almost shown contractive behavior (Figure 7b). Where, it has been observed that the introduction of fiber inclusions limits the soil dilatancy.…”

Section: Medium Dense Samples (Dr=50%)mentioning

confidence: 88%

Effect of randomly distributed polypropylene fiber reinforcement on the shear behavior of sandy soil

Benziane

Della

Denine

et al. 2019

Studia Geotechnica Et Mechanica

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The inclusions of geosynthetic materials (fibers, geomembranes and geotextiles) is a new improvement technique that ensures uniformity in the soil during construction. The use of tension resisting discreet inclusions like polypropylene fibers has attracted a significant amount of attention these past years in the improvement of soil performance in a cost-efficient manner. A series of direct shear box tests were conducted on unreinforced and reinforced Chlef sand with different contents of fibers (0, 0.25, 0.5 and0.75%) in order to study the mechanical behavior of sand reinforced with polypropylene fibers. Samples were prepared at three different relative densities 30%, 50% and 80% representing loose, medium dense and dense states,respectively, and performed at normal stresses of 50, 100 and 200 kPa. The experimental results show that the mechanical characteristics are improved with the addition of polypropylene fibers. The inclusion of randomly distributed fibers has a significant effect on the shear strength and dilation of sandy soil. The increase in strength is a function of fiber content, where it has been shown that the mechanical characteristics improve with the increase in fiber content up to 0.75%, this improvement is more significant at a higher normal stress and relative density.

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Section: Medium Dense Samples (Dr=50%)mentioning

confidence: 88%

Effect of randomly distributed polypropylene fiber reinforcement on the shear behavior of sandy soil

Benziane

Della

Denine

et al. 2019

Studia Geotechnica Et Mechanica

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“…Furthermore, it is easily found that the average particle size of cement soil broken fragments gradually increases as the polypropylene fiber content increases from 0% to 1.2%. e reason is that with the inclusion of polypropylene fiber, the bite force and friction force between the polypropylene fiber and cement soil have a significant improvement [26]. Moreover, the polypropylene fibers interweaved inside cement soil to form a space structure system, which also has resulted in the enhancement of integrality of cement soil [13,26].…”

Section: Fractal Characteristics Of Cement Soil Fragmentationmentioning

confidence: 99%

“…e reason is that with the inclusion of polypropylene fiber, the bite force and friction force between the polypropylene fiber and cement soil have a significant improvement [26]. Moreover, the polypropylene fibers interweaved inside cement soil to form a space structure system, which also has resulted in the enhancement of integrality of cement soil [13,26]. When the cement soil is subjected to the impact loading, the bite force, friction force, and the stable space structure system can work together to effectively restrict the generation and expansion of microcracks inside cement soil.…”

Section: Fractal Characteristics Of Cement Soil Fragmentationmentioning

confidence: 99%

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Pang

Huang

2019

Advances in Materials Science and Engineering

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This paper aims to study the dynamic mechanical properties, failure patterns, fractal behaviors, and energy dissipation of polypropylene fiber-reinforced cement soil under impact loading. Dynamic compression tests for reinforced cement soil with different polypropylene fiber contents of 0%, 0.4%, 0.8%, and 1.2% were conducted using a 50 mm diameter split Hopkinson pressure bar (SHPB) device. The static and dynamic stress-strain curves, dynamic strength increase factor (DIF), fractal behaviors, and energy dissipation properties of polypropylene fiber-reinforced cement soil were investigated and analyzed. The experimental results indicated that the dynamic strength increase factor (DIF) of cement soil increases firstly and then decreases with the increase of polypropylene fiber content from 0% to 1.2%. The maximum dynamic compressive strength of cement soil was obtained with adding 0.8% polypropylene fiber. With the increase of polypropylene fiber content, the average particle size of cement soil fragments has an increasing trend, whereas the fractal dimension presents a decreasing trend. Besides, the fragmentation degree of cement soil decreases correspondingly with the increase of polypropylene fiber content. The fractal dimension value has a linear relationship with the polypropylene fiber content and a decreasing exponential relationship with the average particle size. The absorbed energy per unit volume of cement soil presents an increasing trend firstly and a decreasing trend subsequently as the polypropylene fiber content increases from 0% to 1.2%. When the fractal dimension of cement soil is kept in the range of 2.04 to 2.15, the absorbed energy per unit volume of cement soil increases first and then decreases. The absorbed energy per unit volume of cement soil has a quadratic parabola relationship with polypropylene fiber content and fractal dimension, respectively. At last, the relationship of the absorbed energy per unit volume, fractal dimension, and polypropylene fiber content can be established, which can be used in the studies of dynamic behaviors and fractal properties of the fiber-reinforced cement soil under impact loading.

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“…It is of great significance for improving the stability and reliability of the foundation. 4 In a lime-modified carbonate-soil port city, the degree of compaction of the highway subgrade is usually measured using porosity. When the porosity of the road bed of the lime-modified carbonate-soil port city is low, the limemodified carbonate stain filler is not easily modified, so the probability of the load overload load is low, and when the porosity of the lime-modified carbonate soil port city highway subgrade is high, 5 the particle flow discrete element is permeable and separated, and the lime of the base soil is easily impacted by the lime of the base soil and the load on the local base is higher.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of lime‐modified carbonate soil for highway subgrade filling

Zheng¹,

Qingqing³

2020

Asia-Pacific J Chem Eng

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For the lime modified carbonate rock soil road subgrade of port highway, after the lime modified carbonate rock filler is used to treat it, the particle discrete unit has the characteristics of sparsity, and the particle gradation is caused by the seepage of soil mass, and with the increase in load, overload load occurs. It is therefore necessary to establish relevant mathematical models to analyze the load variation of lime‐modified carbonate roadbed under boundary conditions. The probability mathematical model of the load overload of lime‐modified carbonate fill was studied, and a feasibility analysis model of lime‐modified carbonate soil used in port city highway subgrade filling was put forward based on the discrete hysteretic characteristic curve method. The load characteristics of lime‐modified carbonate soil were analyzed within the limited area distribution range of adjacent two holes. The load energy transfer model of lime‐modified carbonate packing in foundation soil was analyzed in PFC3D software. The foundation stress reinforcement method was used to improve the carbonate soil foundation construction and, combined with the seepage model of the radial consolidation of the foundation, a filling feasibility analysis of the urban highway subgrade of lime‐modified carbonate soil port was carried out. The simulation results show that this method can effectively realize the load overload analysis of lime‐modified carbonate packing, improve the load capacity of subgrade filler for port city highway, and improve the load property of highway subgrade of port city. Keep the soil particles in close contact. This study provides a feasible basis for future highway construction and the application of lime‐modified carbonate.

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Mechanical properties of soil reinforced with both lime and four kinds of fiber

Cited by 127 publications

References 23 publications

Effect of randomly distributed polypropylene fiber reinforcement on the shear behavior of sandy soil

Effect of randomly distributed polypropylene fiber reinforcement on the shear behavior of sandy soil

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Feasibility of lime‐modified carbonate soil for highway subgrade filling

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