The effect of adding polypropylene fibers on the freeze-thaw cycle durability of lignosulfonate stabilised clayey sand

Roshan, Kaveh; Choobbasti, Asskar Janalizadeh; Kutanaei, Saman Soleimani; Fakhrabadi, Alireza

doi:10.1016/j.coldregions.2021.103418

Cited by 35 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soil samples showed a velocity variation of 515 m/s for samples with 18.0% water content, 490 m/s for samples with 21.5% water content, and 406 m/s for samples with 23.0% water content after the freeze-thaw tests with the maximum number of cycles. As previously explained by [ 36,37] the soil has a decrease in the UPV during thaw cycles, while the soil has a slight rise in the UPV during freeze cycles. The water inside the pores and voids between the soil particles tends to freeze when the temperature is lowered to negative during the freezing process, reducing the volume and raising the internal pressure on the soil particles.…”

Section: Effects Of the Freeze-thaw Cycles And Water Contents On The ...supporting

confidence: 52%

A Study on Uniaxial Compressive Strength and Ultrasonic Non-Destructive Analysis of Fine-Grained Soil in Seasonally Frozen Regions

Umar¹,

FIRAT

2022

Turkish Journal of Science and Technology

View full text Add to dashboard Cite

An experimental study has been carried out on clay soil with different water contents (18%, 21.5%, and 23%) after repeated freeze-thaw cycles (0, 2, 5, 7, 12, and 15). The performance of soil was evaluated using unconfined compressive strength (UCS) and ultrasonic pulse velocity (UPV) tests. The experimental results demonstrated that UCS peak values were observed at the lowest water content before and after the freeze-thaw cycles. The stress-strain curves exhibited strain-softening behavior, and this condition transitioned to strain hardening behavior after freeze-thaw cycles and with an increment in water content. Moreover, the highest values of UPV were observed for UCS values increasing due to capillary forces at minimum values of water content. Moreover, an increase in the number of freeze-thaw cycles resulted in a decrease in the UPV. According to correlations between UPV and UCS values, the highest correlations for water contents were obtained at optimum water content, and a decreasing trend was observed after experiencing a number of freeze-thaw periods. In addition, the Grey correlation analysis was performed to show the degree of correlation between the UCS and UPV, water content as well freeze-thaw cycles. The results demonstrated that the UPV values have a greater impact on the UCS than other parameters.

show abstract

Section: Effects Of the Freeze-thaw Cycles And Water Contents On The ...supporting

confidence: 52%

A Study on Uniaxial Compressive Strength and Ultrasonic Non-Destructive Analysis of Fine-Grained Soil in Seasonally Frozen Regions

Umar¹,

FIRAT

2022

Turkish Journal of Science and Technology

View full text Add to dashboard Cite

show abstract

“…The above study found that the mechanical properties of cement-stabilized soil incorporated with fibers were enhanced [19][20][21][22][23][24]. In addition, in some research, the strength deterioration of cement-stabilized soil reinforced with fibers was reduced, and the durability was enhanced [5,[25][26][27][28][29]. Roshan et al [25,26] studied the durability of fiber-reinforced cement-stabilized soil through different tests by adding polypropylene fibers into stabilized sand.…”

Section: Introductionmentioning

confidence: 95%

“…In addition, in some research, the strength deterioration of cement-stabilized soil reinforced with fibers was reduced, and the durability was enhanced [5,[25][26][27][28][29]. Roshan et al [25,26] studied the durability of fiber-reinforced cement-stabilized soil through different tests by adding polypropylene fibers into stabilized sand. Tiwari et al [5,27] explored its coupled effect on controlling the strength and durability of expansive soil by using different fibers to improve stabilized soil.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Strength Deterioration and Mechanism of Stabilized River Silt Reinforced with Cement and Alginate Fibers

Wang,

et al. 2024

Materials

View full text Add to dashboard Cite

River silt deposited by water in coastal areas is unsuitable for engineering construction. Thus, the in situ stabilization treatment of river silt as the bearing layer has been an important research area in geotechnical engineering. The strength degradation behavior and mechanism of stabilized river silt reinforced with cement and alginate fibers (AFCS) in different engineering environments are crucial for engineering applications. Therefore, freeze–thaw (F–T) cycle tests, wetting-drying (W–D) cycle tests, water immersion tests and seawater erosion tests were conducted to explore the strength attenuation of stabilized river silt reinforced with the same cement content (9% by wet weight) and different fiber contents (0%, 0.3%, 0.6% and 0.9% by weight of wet soil) and fiber lengths (3 mm, 6 mm and 9 mm). The reinforcement and damage mechanism of AFCS was analyzed by scanning electron microscopy (SEM) imaging. The results indicate that the strength of AFCS was improved from 84% to 180% at 15 F–T cycle tests, and the strength of AFCS was improved by 26% and 40% at 30 W–D cycles, which showed better stability and excellent characteristics owing to the hygroscopic characteristics of alginate fiber arousing the release of calcium and magnesium ions within the alginate. Also, the strength attenuation of AFCS was reduced with the increase in the length and content of alginate fibers. Further, the strength of specimens in the freshwater environment was higher than that in the seawater environment at the same fiber content, and the softening coefficient of AFCS in the freshwater environment was above 0.85, indicating that the AFCS had good water stability. The optimal fiber content was found to be 0.6% based on the unconfined compressive strength (UCS) reduction in specimens cured in seawater and a freshwater environment. And the strength of AFCS was improved by about 10% compared with that of cement-stabilized soil (CS) in a seawater environment. A stable spatial network structure inside the soil was formed, in which the reinforcing effect of fibers was affected by mechanical connection, friction and interfacial bonding. However, noticeable cracks developed in the immersed and F–T specimens. These microscopic characteristics contributed to decreased mechanical properties for AFCS. The results of this research provide a reference for the engineering application of AFCS.

show abstract

“…Soil cementing agents may be inorganic, organic, or a combination of organic and inorganic (Giovannini et al, 1976;Shi et al, 2002) Although these three types of cementing agents may be found at the same time in different soil types, the composition of organic and inorganic cementing agents in the soil differs due to differences in parent materials, bioclimatic conditions, and agricultural management. In soils with high organic matter content and low clay and oxidized iron and aluminum, the role of organic matter is dominant (Guénet et al, 2016;Ren et al, 2011); in soils with low organic matter content, but high clay and oxidized iron and aluminum content, the formation of soil aggregates is mainly due to the cohesive force between clay particles and due to cementation by iron and aluminum oxides (Barral et al, 1998;Roshan et al, 2022;Skjemstad et al, 1993). Numerous studies have investigated the quantity, distribution, stability, and other factors that influence the formation of soil aggregates (Chaney et.al., 1986a;Terpstra et al, 1990;Diaz et al, 1994;Schomburg et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Long-term effects of soft rock amendment on changes of soil aggregate cementing agents of sandy soil by SEM-EDS

Sun

Liu

Han

et al. 2023

Front. Environ. Sci.

View full text Add to dashboard Cite

Soil aggregates are a crucial constituent of soil and have a significant function in regulating water, nutrients, air, and heat within the soil. The development of soil aggregates is influenced by various factors, including the soil’s parent material and human activities. Understanding the formation and the mechanism of stabilization of soil aggregates is of great significance in the study of soil development, in regulating and managing organic carbon pools in soils, and in promoting soil fertility. In this study, aeolian sandy soil with a low degree of soil development and compound soil formed by combining soft rock and aeolian sandy soil were selected as the research objects. We selected three time points from 0 to 9 years after amendment by soft rock in order to investigate the changes of soil aggregate cementing agents. The shape of soil aggregates in both types of soils was analyzed by environmental scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), which were also used to assess the appearance of soil aggregates and quantify the composition of mineral elements on a cross section of the aggregate. The results show that when the soft rock and the aeolian sandy soil are compounded and mixed, the clay minerals in the soft rock change the microstructure of the original aeolian sandy soil from a single granular barrier to one characterized by a cumulative porous structure, indicating that clay minerals promote soil development and form aggregates with good structural properties. The cementing agents in the compounded soil aggregates are mainly clay minerals, aluminum, iron, and calcium. In comparison to aeolian sandy soils, the presence of iron and calcium in compounded soils is notably elevated. The iron oxides present in compounded soils serve a similar function to “bolts” in the formation of soil aggregates. These findings establish a theoretical foundation for investigating the process of soil aggregate formation and the mechanisms by which cementing agents contribute to their stabilization.

show abstract

The effect of adding polypropylene fibers on the freeze-thaw cycle durability of lignosulfonate stabilised clayey sand

Cited by 35 publications

References 22 publications

A Study on Uniaxial Compressive Strength and Ultrasonic Non-Destructive Analysis of Fine-Grained Soil in Seasonally Frozen Regions

A Study on Uniaxial Compressive Strength and Ultrasonic Non-Destructive Analysis of Fine-Grained Soil in Seasonally Frozen Regions

Experimental Study on the Strength Deterioration and Mechanism of Stabilized River Silt Reinforced with Cement and Alginate Fibers

Long-term effects of soft rock amendment on changes of soil aggregate cementing agents of sandy soil by SEM-EDS

Contact Info

Product

Resources

About