Splitting Tensile Strength of Fiber-Reinforced and Biocemented Sand

Choi, Sun-Gyu; Hoang, Tung; Alleman, E. James; Chu, Jian

doi:10.1061/(asce)mt.1943-5533.0002841

Cited by 35 publications

(21 citation statements)

References 23 publications

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“…Research on the assessment of the tensile strength of the specimens prepared with MICP is very limited, mostly focusing on reinforcement characteristics of bio-cemented sands [ 28 , 29 ]. Brazilian splitting tests on specimens with varying relative densities were carried out by van Paassen [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation

2021

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Artificially bio-cemented sands treated with microbially induced calcite precipitation are weakly cemented rocks representing intermediate materials between locked and carbonate sands. Variations in cementation significantly affect the strength of sample, particularly tensile stregth. The modes of fracture and the surface characteristics resulting from the indirect tensile strength tests (Brazilian tests) are strongly correlated with the specimen strength and consequently the degree of cementation. This study examines the tensile strength of bio-cemented fine and coarse sands (average particle diameter 0.18 and 1.82 mm, respectively) and investigates failure modes by recording fracture evolution at both sides of specimen and surface characteristics of the reconstructed surfaces. The dimensionless slope parameter Z2 provided the best fit with respect to tensile strength while the power spectral density was a good indicator of surface anisotropy. Finally, wavelet decomposition allowed for comparison of fracture surface characteristics of the two sands ignoring the grain size effects.

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Section: Introductionmentioning

confidence: 99%

Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation

2021

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“…The calcite precipitation modifies or enhances the strength of the sample and different studies have investigated this influence through various laboratory tests namely, UCS tests [43,[76][77][78][79][80][81], STS tests [54,79,80,[82][83][84][85], direct simple shear tests [30], triaxial tests [28,79,[86][87][88][89][90][91], cyclic triaxial tests [92] and cone penetration tests [62]. Some of the observations are summarised below.…”

Section: Engineering Properties Of Treated Soilmentioning

confidence: 99%

“…Similar to UCS, a series of STS tests on MICP-treated soils have been reported in recent literature [54,79,80,[82][83][84][85]. In these studies, STS values have been assessed and compared with other parameters such as the CaCO 3 content [79,80,82], different soil types [54,82], and reinforced fibre content [83][84][85]. A summary of the studies can be found in Table 3.…”

Section: Indirect (Splitting) Tensile Strengthmentioning

confidence: 99%

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

et al. 2020

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Microbial-induced calcite precipitation (MICP) is a promising new technology in the area of Civil Engineering with potential to become a cost-effective, environmentally friendly and sustainable solution to many problems such as ground improvement, liquefaction remediation, enhancing properties of concrete and so forth. This paper reviews the research and developments over the past 25 years since the first reported application of MICP in 1995. Historical developments in the area, the biological processes involved, the behaviour of improved soils, developments in modelling the behaviour of treated soil and the challenges associated are discussed with a focus on the geotechnical aspects of the problem. The paper also presents an assessment of cost and environmental benefits tied with three application scenarios in pavement construction. It is understood for some applications that at this stage, MICP may not be a cost-effective or even environmentally friendly solution; however, following the latest developments, MICP has the potential to become one.

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“…Numerous studies have demonstrated that the MICP process can significantly improve the engineering properties of soils, such as the strength [113][114][115][116][117][118][119][120][121][122] as shown in Fig. 1, stiffness [115,118,[123][124][125][126][127][128][129][130][131][132], and thermal conductivity [133,134], etc. Some studies also proposed to further enhance the strength of bio-cemented soil by adding other materials, such as lime [42], fiber [54,125,[135][136][137][138][139][140][141][142][143], hydrogelassisted [144], the hydrophilic polymer [145,146], and alginate [147].…”

Section: Strength Enhancement Of Soilmentioning

confidence: 99%

Recent development in biogeotechnology and its engineering applications

Cui

Chu

2021

Front. Struct. Civ. Eng.

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Microbial geotechnology or biogeotechnology is a new branch of geotechnical engineering. It involves the use of microbiology for traditional geotechnical applications. Many new innovative soil improvement methods have been developed in recent years based on this approach. A proper understanding of the various approaches and the performances of different methods can help researchers and engineers to develop the most appropriate geotechnical solutions. At present, most of the methods can be categorized into three major types, biocementation, bioclogging, and biogas desaturation. Similarities and differences of different approaches and their potential applications are reviewed. Factors affecting the different processes are also discussed. Examples of up-scaled model tests and pilot trials are presented to show the emerging applications. The challenges and problems of biogeotechnology are also discussed.

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Splitting Tensile Strength of Fiber-Reinforced and Biocemented Sand

Cited by 35 publications

References 23 publications

Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation

Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

Recent development in biogeotechnology and its engineering applications

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