Influence of anionic polyacrylamide on the freeze–thaw resistance of silty clay

Yang, Jiale; Li, Shuangyang; Di, Honggui; Liu, Deren; Wang, Xu; Zhao, Yongchun

doi:10.1016/j.coldregions.2023.104111

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…However, the rate of loss of mass of the former was much smaller than that of the latter. Accordingly, the results of the rate of loss of mass quantitatively verified the results of the evolution in the appearance of the brick samples [47]. The fiber content was 0.4% for samples (a)-(d) and zero for samples (e)-(h).…”

Section: Freeze-thaw Cycle Test Of Unfired Brickssupporting

confidence: 70%

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Liu,

Guo,

Zhang

et al. 2024

Materials

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Aeolian sand and loess are both natural materials with poor engineering-related properties, and no research has been devoted to exploring aeolian sand–loess composite materials. In this study, we used aeolian sand and loess as the main raw materials to prepare unfired bricks by using the pressing method, along with cement, fly ash, and polypropylene fiber. The effects of different preparation conditions on the physical properties of the unfired bricks were investigated based on compressive strength, water absorption, and softening tests and a freeze–thaw cycle test combined with X-ray diffraction and scanning electron microscope analysis to determine the optimal mixing ratio for unfired bricks, and finally, the effects of fibers on the durability of the unfired bricks were investigated. The results reveal that the optimal mixing ratio of the masses of aeolian sand–loess –cement –fly ash–polypropylene fiber–alkali activator–water was 56.10:28.05:9.17:2.40:0.4:0.003:4.24 under a forming pressure of 20 MPa. The composite unfired bricks prepared had a compressive strength of 14.5 MPa at 14 d, with a rate of water absorption of 8.8%, coefficient of softening of 0.92, and rates of the losses of frozen strength and mass of 15.93% and 1.06%, respectively, where these satisfied the requirements of environmentally protective bricks with strength grades of MU10–MU15. During the curing process, silicate and sodium silicate gels tightly connected the particles of aeolian sand and the loess skeleton, and the spatial network formed by the addition of the fibers inhibited the deformation of soil and improved the strength of the unfired bricks.

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Section: Freeze-thaw Cycle Test Of Unfired Brickssupporting

confidence: 70%

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Liu,

Guo,

Zhang

et al. 2024

Materials

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Model test study on the rainfall erosion mechanisms and reclamation potential of open-pit coal mine dump soil improved by fly ash and polyacrylamide

Li,

Wang,

Zhao

et al. 2025

Engineering Geology

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Research on Solidification Methods and Stabilization Mechanisms of Sulfate Saline Soils

Li,

Huang,

Sun

et al. 2024

Applied Sciences

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In cold regions, saline soils can cause dissolution, settlement, and salt expansion of the roadbed under the influence of freeze–thaw cycles, so they need to be stabilized during road construction. In this study, lime, fly ash (FA), and polyacrylamide (PAM) were used to stabilize sulfate saline soils, and the stabilized saline soils were subjected to the unconfined compressive strength test (UCS), splitting test, and freeze–thaw cycle tests (FTs). The stabilization mechanism of the three materials on saline soils was also studied via scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), and X-ray photoelectron spectroscopy (XPS). The test results showed that the addition of lime, FA, and PAM to saline soils can improve the mechanical properties and frost resistance of saline soils. After 28 d of curing, the UCS of FA-, PAM-, and lime-stabilized saline soils increased by at least 55%, 23%, and 1068%, respectively, and the splitting strength increased by at least 161%, 75%, and 2720%, respectively. After five freeze–thaw cycles, the residual strength ratios (BDRs) of the UCS of L2 (lime 8%), F2 (FA 11%), and P2 (PAM 1%) stabilized soils and saline soils were 71.78%, 56.42%, 39.05%, and 17.95%, respectively, and the decreasing trend tended to be stable. The saline soils stabilized by lime and FA were chemically stabilized, and their mechanical properties and frost resistance were better than the physical stabilization of PAM.

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Influence of anionic polyacrylamide on the freeze–thaw resistance of silty clay

Cited by 5 publications

References 37 publications

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Model test study on the rainfall erosion mechanisms and reclamation potential of open-pit coal mine dump soil improved by fly ash and polyacrylamide

Research on Solidification Methods and Stabilization Mechanisms of Sulfate Saline Soils

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