Effects of cement content and curing period on geotechnical properties of cement-treated calcareous sands

Gu, Jianxiao; Lyu, Haibo; Yang, Junyan; Zeng, Chao

doi:10.1016/j.trgeo.2022.100732

Cited by 15 publications

(11 citation statements)

References 44 publications

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“…Ultimately, when the gel material content is sufficient, hydration products fill pores between the particles, enhancing interlocking and bonding, resulting in a stabilized specimen with a cohesive structure and improved load-bearing capacity. Further elaboration on this mechanism is available in another paper by the authors [ 11 ]. This leads to a higher

increase in the G-stabilized specimen with 22% gel material content compared to other gel material content levels as the confining pressure increases.…”

Section: Cu Tests Results and Discussionmentioning

confidence: 99%

“…Two suppositions were formulated concerning the increase in the value of the parameter M. The first suggests that particles might remain bonded (bonding effect), potentially enhancing the strength of the stabilized specimen. The second point suggests that various sizes of cemented clusters persisted at this critical state, forming more resilient force-chain networks to enhance the residual strength, as elucidated by Gu et al [11]. Moreover, the parameter c of the stabilized specimens between 110 and 475 kPa wi cement exhibited a substantial enhancement compared to the values between 16 and 308 kPa in a specimen without treatment [47,48].…”

Section: Mechanical Properties Of Stabilized Specimensmentioning

confidence: 98%

“…Gel material treatment has demonstrated its practicality in mitigating potential risks in sand- or soil-rich regions [ 7 , 8 , 9 , 10 ]. Notably, after gel material treatment, calcareous sand demonstrates a considerable strength improvement [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, this approach resulted in brittle failure in a gypsum-cemented specimen. Gu et al [ 11 ] utilized Portland cement as a hardening agent for stabilizing coastal sands, leading to a significant enhancement in the q ucs (unconfined compressive strength) of the solidified specimens. Zeng et al [ 19 ] presented a method that combines phosphor-gypsum with cement to improve the unconfined compressive strength of soils with high water content.…”

Section: Introductionmentioning

confidence: 99%

“…Mahawish et al [ 36 ] conducted scanning electron microscope tests on bonding products with heavy and light biochemical treatments, revealing varied quantities of calcium carbonate crystals in different specimens and offering empirical evidence for the treatment’s efficacy. Additionally, Sharaky et al [ 37 ] and Gu et al [ 11 ] utilized scanning electron microscope tests to study the microstructure of stabilized calcareous sand and investigate the underlying mechanisms of strength enhancement. Despite extensive investigations into the strength enhancement of stabilized soils under different levels of gel material content, curing periods, and confining pressures, a comprehensive understanding of shear strength and mechanical behavior remains absent across different gel material-treated specimens.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Enhancing Load-Bearing Capacity of Calcareous Sands through Gel Stabilization: A Mechanical and Material Characterization Study

Gu,

Lyu,

et al. 2024

Gels

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Calcareous sands often display wide ring grain configurations, high intragranular porosity, a complex structure, and low grain hardness. These attributes typically do not meet the strength criteria necessary to sustain overlying infrastructure in civil engineering applications. This study investigates gel stabilization techniques, blending gel material with calcareous sand at concentrations ranging from 5% to 22%, followed by curing periods of 3 to 28 days to evaluate the load-bearing capacity. Subsequently, an unconfined compressive test is performed to determine the gel material content in stabilized specimens and investigate the influence of gel material types. The gel material-to-sand ratios employed are set at 5%, 10%, and 16% for Portland cement and 13%, 16%, and 22% for gypsum. After that, a triaxial consolidated undrained test is conducted to assess mechanical behavior, pore water pressure, and mechanical properties. The findings reveal increased dilation, stress–strain hardening, and softening post-yield, regardless of gel material type. Principal stress ratios, secant modulus, and cohesion show a positive correlation with maintenance duration and binder content, with implications for improved load-bearing capacity. The study also elucidates the qualitative relationship between secant modulus E50 and confining pressure.

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increase in the G-stabilized specimen with 22% gel material content compared to other gel material content levels as the confining pressure increases.…”

Section: Cu Tests Results and Discussionmentioning

confidence: 99%

Section: Mechanical Properties Of Stabilized Specimensmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhancing Load-Bearing Capacity of Calcareous Sands through Gel Stabilization: A Mechanical and Material Characterization Study

Gu,

Lyu,

et al. 2024

Gels

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Experimental study on the reinforced concrete beams with varied stirrup reinforcement ratio under static and impact loads

Gu,

Li,

Huang

et al. 2024

Structural Concrete

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With the increasing utilization of reinforced concrete (RC) beams in eco‐friendly and fast‐paced construction practices, evaluating their impact performance becomes imperative. These beams are susceptible to unforeseen impact loads resulting from accidents or terrorist incidents throughout their service lifespan. Five groups of RC beams, each subjected to different curing periods, stirrup reinforcement, and drop hammer heights, were fabricated. Among these groups, one underwent static load testing, while the remaining groups were subjected to impact load testing utilizing the drop hammer test system. The failure modes, static response, dynamic response, and energy dissipation of RC beams were analyzed. Static tests revealed that RC beams exhibited a flexure‐governed failure mode with top surface concrete crushing, aligning with expectations. With increased stirrup reinforcement ratios, shear and flexural‐shear cracks during impact tests decreased, with high impact loads causing diagonal shear failure, severe concrete crushing, additional diagonal shear cracks, and a broader crack distribution. Higher drop hammer heights were found to increase overall energy dissipation, whereas increased stirrup reinforcement ratios resulted in moderate decrease. Specifically, the overall energy dissipation increased with higher drop hammer heights. Conversely, an increase in the stirrup reinforcement ratio was linked to a certain degree of decrease in overall energy dissipation.

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Strength, Permeability, and Microstructure of Cement Treated Dredging Sand

Luong

Tran-Nguyen

2023

Geotech Geol Eng

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Effects of cement content and curing period on geotechnical properties of cement-treated calcareous sands

Cited by 15 publications

References 44 publications

Enhancing Load-Bearing Capacity of Calcareous Sands through Gel Stabilization: A Mechanical and Material Characterization Study

Enhancing Load-Bearing Capacity of Calcareous Sands through Gel Stabilization: A Mechanical and Material Characterization Study

Experimental study on the reinforced concrete beams with varied stirrup reinforcement ratio under static and impact loads

Strength, Permeability, and Microstructure of Cement Treated Dredging Sand

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