Strain-Dependent Shear Stiffness of Cement-Treated Marine Clay

Yao, Kai; Chen, Qingsheng; Ho, Jiahui; Xiao, Hao; Lee, Fook Hou

doi:10.1061/(asce)mt.1943-5533.0002460

Cited by 40 publications

(16 citation statements)

References 34 publications

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“…Due to the rapid development of global economy, as an environmentally friendly material, soil-cement has been widely used in soft soil foundation reinforcement, slope support, and channel lining in construction projects (roads, bridges, ports, etc.) [1][2][3][4]. Soil-cement has the advantages of easy access to draw materials, low price, and convenient construction.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties, Failure Mode, and Microstructure of Soil-Cement Modified with Fly Ash and Polypropylene Fiber

Duan

Zhang

2019

Advances in Materials Science and Engineering

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In order to investigate the effects of fly ash and polypropylene fiber on mechanical properties, failure mode, and microstructure of soil-cement, the unconfined compression test, splitting tension test, and scanning electron microscopy (SEM) test of soil-cement with different polypropylene fiber contents (0%, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% by weight of dry soil) and fly ash contents (0%, 4%, 8%, and 12% by weight of dry soil) were carried out. The compressive and tensile strengths, deformation characteristics, failure mode, and microstructure of soil-cement modified with fly ash and polypropylene fiber were analyzed. The results show that the unconfined compressive strength and splitting tensile strength of soil-cement show a trend of increasing first and then decreasing with the increase of polypropylene fiber and fly ash content. Under the condition of 0.4% polypropylene fiber and 8% fly ash, the unconfined compressive strength and the splitting tensile strength are 4.90 MPa and 0.91 MPa, respectively, which increased by 32.79% and 51.67% as compared with the plain soil-cement, respectively. When 8% fly ash was used in the experiment, the unconfined compressive peak strain and the splitting tensile peak strain of the inclusion of 0.4% polypropylene fiber were 0.0410 and 0.0196, respectively. The corresponding peak strains were increased by 20.94% and 68.97% as compared with non-fiber-stabilized soil-cement, respectively. The stress-strain curve of fly ash soil-cement modified with polypropylene fiber can be divided into compaction phase, linear rise phase, nonlinear rise phase, and failure phase. Polypropylene fiber constrains the lateral deformation of fly ash soil-cement, which improves the peak strain and the failure mode of soil-cement.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties, Failure Mode, and Microstructure of Soil-Cement Modified with Fly Ash and Polypropylene Fiber

Duan

Zhang

2019

Advances in Materials Science and Engineering

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“…Taking material composition of the slurry into account, it can be modified using certain treatment technology to satisfy the requirement of subgrade filling, which can provide a strategy for realizing resource utilization of construction waste slurry, saving land resources, and leading to a green and resilient modern urban construction [7]. e technology of enhancing mechanical properties of soft soil through cement has been widely applied in engineering [8]. It can be used in the dam, structure foundation, slope stabilization, vibration attenuation in high-speed railway, alleviation of liquefaction, stabilization (or solidification) of deep-mixed soil walls and contaminated soil, and so on.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Short‐Term Strength Properties of Fiber/Cement‐Modified Slurry

Jiang

Mao

et al. 2019

Advances in Civil Engineering

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e recycling of construction waste slurry is an urgent issue that needs to be solved in urban construction. To satisfy the requirements of subgrade filling, mechanical properties of fiber/cement-modified slurry were investigated. Unconfined compression tests were conducted for 7-day-cured specimens with a cement content of 5%, 10%, 15%, 20%, 25%, and 30%, respectively. Moreover, the effects of fiber contents (0.25%, 0.5%, 0.75%, and 1%, respectively) were also investigated for the specimens with a cement content of 20%. A formula satisfying the accuracy requirement was obtained by fitting the stress-strain curves using the back propagation (BP) neural network algorithm. Five parameters, including peak strength, failure strain, initial elastic modulus, residual strength, and energy dissipation, were used to characterize the short-term strength properties of fiber/cement-modified slurry. e analysis revealed that the cement content had a dominant effect on the short-term strength properties of fiber/cementmodified slurry, while the influence of fiber content was insignificant.

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“…[7][8][9][10][11][12][13] Therefore, stabilization of loess by cementitious materials has been commonly adopted in pavement base layers and road subgrades. [14][15][16][17][18][19][20][21][22][23] Some previous studies showed that the addition of lime can signicantly improve the engineering properties of so soils. Harichane et al studied the effect of lime on the physical and mechanical characteristics of cohesive soils, such as plasticity index, maximum dry density, optimum moisture content and UCS.…”

Section: Introductionmentioning

confidence: 99%