Effects of cement content and soil texture on strength, hydraulic, and microstructural characteristics of cement-stabilized composite soils

Wang, Shengnian; Guo, Shuangfeng; Gao, Xinqun; Zhang, Peng; Li, Guoyu

doi:10.1007/s10064-022-02734-8

Cited by 19 publications

(5 citation statements)

References 37 publications

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“…The amount of cement in the soil-cement mixture has a significant impact on its macroscopic mechanical properties and microstructure. The cement content in cement-soil typically ranges from 8% to 30% [21][22][23]. After preliminary experiments, it was found that it was difficult to ensure the workability and uniformity of the samples at 30% cement content.…”

Section: Cement-soil Monitoring Scheme With Different Cement Contentsmentioning

confidence: 99%

Monitoring the hardening process of cemented soil with polymer optical fibre

Zhibin,

Zhonghao,

Xianfeng

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Cement-soil can effectively improve the mechanical characteristics of soft soil and reduce the deformation of foundations through the physical and chemical processes of cement hydration. After mixing cement with soft soil, the hydration reaction of cement consumes a certain amount of water, which leads to a decrease in the water content. The early strength of cement-soil refers to the undrained shear strength within a few hours of mixing. The initial setting time of cement-soil can reflect its early strength development. In this study, polymer optical fibre (POF) sensors are used to visually monitor the early strength of cement-soil with different cement contents; the monitoring results show that the POF sensor can effectively visualize the hydration process of cemented soil. The cement-soil hydration process is divided into three stages: the initial setting time of the cement-soil is 13-15 h, and the final is 33-41 h. Furthermore, the cement content significantly influences the initial and final setting times of cement-reinforced soil. As the cement content increases, the initial and final setting times of the cement–soil decrease. This study proposes a new method for monitoring the strength of cement-reinforced soils.

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Section: Cement-soil Monitoring Scheme With Different Cement Contentsmentioning

confidence: 99%

Monitoring the hardening process of cemented soil with polymer optical fibre

Zhibin,

Zhonghao,

Xianfeng

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…At 25 • C, the LAS performance of the modified asphalt cementitious material with different amounts of cement hardening mixture was studied [30]. As displayed in Figure 6, the shear stress of asphalt appears to have a peak value, indicating the occurrence of an inflection point.…”

Section: Linear Amplitude Scanningmentioning

confidence: 99%

Investigation into the Rheological Properties and Microstructure of Silt/Crumb Rubber Compound-Modified Asphalt

et al. 2023

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Near the coast of China, a large amount of sediment is produced during construction work. In order to mitigate the environmental damage caused by sediment and enhance the performance of rubber-modified asphalt effectively, solidified silt material and waste rubber were prepared to modify asphalt, and its macroscopic properties, such as viscosity and chemical composition, were determined via a routine physical test, DSR, Fourier Transform Infrared Spectroscopy (FTIR), and Fluorescence Microscopy (FM). The results show that, with the increase in powder particles and the addition of a certain amount of hardened mud, the mixing and compaction temperature of modified asphalt can be significantly increased—still reaching the design standard. In addition, the high thermal stability and fatigue resistance of the modified asphalt were clearly better than those of the ordinary asphalt. From the FTIR analysis, rubber particles and hardened silt only exhibited mechanical agitation with the asphalt. Considering that excessive silt might result in the aggregation of matrix asphalt, the addition of an appropriate amount of hardened solidified silt material can eliminate the aggregation. Therefore, the performance of modified asphalt was optimum when solidified silt was added. Our research can provide an effective theoretical basis and reference values for the practical application of compound-modified asphalt. Therefore, 6%HCS(6:4)-CRMA have better performance. Compared to ordinary rubber-modified asphalt, the composite-modified asphalt binder has better physical properties and a more suitable construction temperature. The composite-modified asphalt uses discarded rubber and silt as raw materials, which can effectively protect the environment. Meanwhile, the modified asphalt has excellent rheological properties and fatigue resistance.

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“…However, unconfined compression tests indicate that the measured UCS increases for cement-stabilized soil. Wang et al [15] investigated the impact of soil texture and cement content. The tests conducted were on the hydraulic, strength, and microstructural characteristics of cement-stabilized composite soils.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Strength and Microstructure of Soft Soil Stabilized with Cement, Lime, and Metakaolin-Based Geopolymer Stabilizers

Wassie,

Demir

2024

Advances in Civil Engineering

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Soft soils require particular consideration when designing civil engineering structures due to their high compressibility, low shear strength, and permeability. Using chemical additives and geopolymers to stabilize soft soils is a practical approach to improve their engineering properties. The objective of the study was to explore the use of conventional stabilizers alongside metakaolin-based geopolymers. This study also aimed to investigate the compaction characteristics, mechanical strength, shear behavior, and microstructure of stabilized soft soil. The compaction test was carried out using various amounts of cement (6%, 8%, and 10%) and metakaolin (3%, 5%, and 7%) based on the dry weight of the soil. Cement, lime, and geopolymer were added to the soft soil at 15% of the dry weight of the soil for triaxial shear tests. The compaction test results indicated that the stabilized soil exhibited the highest maximum dry density at 8% cement content. Adding metakaolin (MK) to the cement-modified soil decreased the maximum dry density, smoothed the compaction curve, and increased the optimum moisture content. The unconfined compressive strength (UCS) test revealed that cement-stabilized soil had the highest yield stress, while adding MK to the cement-modified soil reduced the yield stress after 7 days of curing. Compared to untreated soft soil, there was a significant increase in shear strength parameters for cement-, metakaolin-, and lime-stabilized soil. This study demonstrates that adding chemical additives and geopolymers can improve the soft soil’s compaction characteristics, mechanical strength, and shear strength parameters.

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Effects of cement content and soil texture on strength, hydraulic, and microstructural characteristics of cement-stabilized composite soils

Cited by 19 publications

References 37 publications

Monitoring the hardening process of cemented soil with polymer optical fibre

Monitoring the hardening process of cemented soil with polymer optical fibre

Investigation into the Rheological Properties and Microstructure of Silt/Crumb Rubber Compound-Modified Asphalt

Mechanical Strength and Microstructure of Soft Soil Stabilized with Cement, Lime, and Metakaolin-Based Geopolymer Stabilizers

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