Mechanical Properties and Microstructure of Polypropylene Fiber Reinforced Cement Mortar Soil

Ruan, Bo; Ding, Hui; Teng, Jidong; Deng, Wei Hua; Zheng, Shilong; Ruan, Chenxi

doi:10.1007/s12205-021-1125-3

Cited by 17 publications

(3 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 13 a,b, the random distribution of polypropylene fibers in soil can form a three-dimensional reinforcement network that is similar to the antislide pile, which can increase the interface friction of soil and restrict the relative movement of soil particles [ 39 , 41 ]. Therefore, the internal friction angle of the modified loess can be greatly increased, and this can further explain the phenomenon shown in Figure 6 that the fiber content and the internal friction angle is positively correlated.…”

Section: Discussionmentioning

confidence: 99%

Laboratory Experiments and Numerical Simulation Study of Composite-Material-Modified Loess Improving High-Speed Railway Subgrade

et al. 2022

View full text Add to dashboard Cite

Construction of high-speed railway subgrade on loess soils in the Loess Plateau is risky because such soil is susceptible to differential settlements. Various soil-improvement methods have been used to enhance the mechanical properties of loess. Lime-ash soil and cement-lime soil are the most commonly used methods in the improvement of loess subgrade, while few studies have been found on loess subgrade improvement by using composite material consisting of traditional materials and new materials. A series of direct shear tests and unconfined compressive tests were conducted on the loess specimen with the addition of three kinds of composite materials: traditional material cement, new material polypropylene fiber and SCA-2 soil curing agent. The numerical simulation was conducted on loess subgrade in an actual engineering practice. The experimental results show that cement, polypropylene fiber and SCA-2 soil curing agent can effectively improve the shear strength and compressive strength of loess, and the influence degree is cement > fiber > curing agent. Additionally, based on the relative strength characteristics of the improved loess, an optimal improvement scheme for the composite-material-modified loess was obtained: 16% cement content + 0.5% fiber content + 4% curing agent content. The numerical simulation results revealed that the compressive strength index of the improved loess has a significant impact on the subgrade settlement, and the optimal improvement scheme obtained from comprehensive analysis can effectively improve the settlement of high-speed railway subgrade under vibration load.

show abstract

Section: Discussionmentioning

confidence: 99%

Laboratory Experiments and Numerical Simulation Study of Composite-Material-Modified Loess Improving High-Speed Railway Subgrade

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The research results of Sukontasukkul et al indicate that as the volume fraction of polypropylene fibers in cementitious soil increases, its toughness also increases [ 23 ]. Ruan et al showed through UCS and flexural strength tests that with an increase in fiber content, the UCS, residual strength, and flexural strength of fiber-reinforced cement mortar soil were significantly improved [ 24 ]. Zaimoglu et al studied the effect of randomly distributed polypropylene fibers (PP) and some additive materials such as borogypsum (BG), fly ash (FA), and cement (C) on the infinite compressive strength of soil.…”

Section: Introductionmentioning

confidence: 99%

Strength and Deformation Characteristics of Fiber and Cement-Modified Waste Slurry

Ye,

Jiang,

Chen

et al. 2023

Polymers

View full text Add to dashboard Cite

Using fiber and cement to modify waste slurry and apply it to roads is an effective way to recycle waste slurry. A new type of road material, fiber–cement-modified waste slurry (FRCS), was prepared in this study. The static and dynamic characteristics of the cement soil were studied using an unconfined compressive strength test and dynamic triaxial test. The results show that the optimum fiber content of FRCS is 0.75%. In the unconfined compressive strength test, under this fiber content, the unconfined compressive strength (UCS) of the FRCS is the largest, and the elastic modulus and modulus strength ratio are both the smallest, indicating that the tensile properties of the cement slurry have been enhanced. In the dynamic triaxial test, the hysteretic curve of the FRCS tends to be stable with the increase in the number of cycles, the dynamic elastic modulus of the FRCS decreases first and then increases with the increase in the dosage, while the damping ratio becomes stable after a rapid decline, and the fiber incorporation increases the cumulative strain of the soil–cement under low-stress cycles, indicating that the ductility of the FRCS is improved. In addition, a cumulative strain prediction model of the FRCS is established in this paper, which can provide a reference for the resource application of waste slurry in road engineering.

show abstract

“…Polypropylene fiber is a synthetic chemical fiber made from isotactic polypropylene. Polypropylene fiber finds extensive application in engineering endeavors due to its notable attributes, including elevated tensile strength, commendable resilience, lightweight composition, robust resistance to corrosion, economical cost, and environmentally conscious characteristics [30][31][32]. The inclusion of polypropylene fiber does not exert a noteworthy influence on the maximum dry density and the optimal moisture content [6], but it enhances both the fiber content and length, yielding more substantial benefits in bolstering the strength and ductility of polypropylene fiber-reinforced cemented soil.…”

Section: Introductionmentioning

confidence: 99%

Effects of Curing Conditions on Splitting Tensile Behavior and Microstructure of Cemented Aeolian Sand Reinforced with Polypropylene Fiber

Ruan,

Zhou,

Yuan

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

Aeolian sand is widely distributed in the Takramagan Desert, Xinjiang, China, which cannot be directly used as railway subgrade filling. It is beneficial for environmental protection to use fiber and cement-reinforced aeolian sand as railway subgrade filling. The present work is to explore the enhancement of tensile strength in cemented aeolian sand via the incorporation of polypropylene fibers under conditions of elevated temperature and drying curing. The purpose Is to delve into the examination of the temperature’s impact on not only the mechanical attributes but also the microstructure of cemented aeolian sand reinforced with polypropylene fiber (CSRPF). For this, a comprehensive set of tests encompassing splitting tensile strength (STS) assessments and nuclear magnetic resonance (NMR) examinations is conducted. A total of 252 CSRPF specimens with varying fiber content (0, 6‰, 8‰, and 10‰) are tested at different curing temperatures (30 °C, 40 °C, 50 °C, 60 °C, 70 °C, and 80 °C). The outcomes of the NMR examinations indicate that elevating the curing temperature induces the expansion of pores within CSRPF, both in size and volume, consequently contributing to heightened internal structural deterioration. STS tests demonstrate that the STS of CSRPF decreases as the curing temperature increases. Meanwhile, the STS of CSRPF increases with fiber content, with optimal fiber content being 8‰. Regression models accurately predict the STS, with the curing temperature exhibiting the greatest influence, followed by the fiber content according to sensitivity analysis. The research results provide a valuable reference for the use of CSRPF as railway subgrade filling under high temperature and drying conditions.

show abstract

Mechanical Properties and Microstructure of Polypropylene Fiber Reinforced Cement Mortar Soil

Cited by 17 publications

References 45 publications

Laboratory Experiments and Numerical Simulation Study of Composite-Material-Modified Loess Improving High-Speed Railway Subgrade

Laboratory Experiments and Numerical Simulation Study of Composite-Material-Modified Loess Improving High-Speed Railway Subgrade

Strength and Deformation Characteristics of Fiber and Cement-Modified Waste Slurry

Effects of Curing Conditions on Splitting Tensile Behavior and Microstructure of Cemented Aeolian Sand Reinforced with Polypropylene Fiber

Contact Info

Product

Resources

About