Bacteria-Induced Cementation in Sandy Soils

Gürbüz, Ayhan; Sari, Yasin Dursun; Yuksekdag, Zehra Nur

doi:10.1080/01490451.2015.1016246

Cited by 13 publications

(5 citation statements)

References 27 publications

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“…The soil samples were first pre-mixed with bacterial culture (Table 1) for the bacterial attachment with soil before the MICP process. Poorly graded sands were used in this study as they demonstrate detrimental engineering behaviour for most geotechnical engineering applications (Gurbuz, Sari & Yuksekdag, 2015). At the end of the biocement treatment test, the loose sands with microbial culture harden and CaCO 3 precipitates were seen at the top layer of the specimens.…”

Section: Micp Treatmentmentioning

confidence: 99%

Microbial-Induced Carbonate Precipitation Using a Sustainable Treatment Technique

2017

IJSMS

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Biocementation is a green treatment technique which makes use of microbially induced carbonate precipitation (MICP) process to enhance the geotechnical features of sub-standard soils. The objective of this study was to conduct a biocement test in laboratory-scale using native urease-producing bacteria to improve the surface strength of poorly graded soil. Selected sand samples were pre-mixed with native bacterial culture and the cementation solution before being compacted into their respective columns. After completing the biocement process, all the sand columns were allowed to air-dry at room temperature (26oC) for 14 days before the treated sands were removed from their respective moulds. Unconfined compression strength (UCS) test was performed on the moulds to determine their strengths, while quick acid test and calcium carbonate (CaCO3) content measurement were conveyed to analyse the precipitated CaCO3 minerals. The results showed that the native urease-producing bacteria could bind soil particles together. The proficiency of this treatment process to improve the strength of soil samples varied among the specimen samples, leading to a non-homogeneous distribution of CaCO3 contents in the specimens. The UCS test showed that the sand treated with native isolate NB 28 had the highest strength (0.219 N/mm2), sustaining a force of 1.020 kN, while the control strain (Sporosarcina pasteurii DSM 33) had the lowest strength (0.143 N/mm2) with a sustaining force of 0.697 kN. The findings in this study suggest that the native urease-producing bacteria isolated from Sarawak limestone cave can be used as alternative MICP agents for the biocement application for sustainability in the construction industry.

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Section: Micp Treatmentmentioning

confidence: 99%

Microbial-Induced Carbonate Precipitation Using a Sustainable Treatment Technique

2017

IJSMS

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“…Therefore, MICP is currently the subject of an increasing number of studies in the geotechnical community. To date, researchers have investigated the precipitation observation [4,5,6,7], the effect of MICP on strength and deformation [8,9,10,11], hydraulic [12,13,14], and thermal [15,16,17] characteristics of sands, mitigation of soil erosion [18,19], and liquefaction [20,21] problems. The outcomes in the literature are promising, yet most of them are still limited to laboratory scale.…”

Section: Introductionmentioning

confidence: 99%

Applications of Microbially Induced Calcium Carbonate Precipitation on Non-Woven Geotextiles

Duman

Saricicek

Pekcan

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Recently, an innovative ground improvement method known as microbially induced calcium precipitation (MICP) has been proposed as an alternative to conventional ground improvement techniques. Having numerous advantages such as being environmentally friendly and promoting sustainable solutions, MICP has been studied by researchers from various civil engineering sub-disciplines to solve problems related to crack propagation of concrete, insufficient soil strength characteristics, soil erosion, asphalt cracks, etc. This study aims at moving MICP one step further by introducing a hybrid approach that combines MICP and geotextiles to produce a good quality product for reliable field use. Within this scope, MICP is applied on non-woven geotextiles. Physical (imaging) and mechanical (puncture resistance) properties of non-woven geotextiles subjected to MICP treatments under soaking conditions are investigated. Puncture resistance tests are performed and the details of laboratory work including specimen preparation and MICP treatments are presented in this paper. This study, together with its implications for future works, also highlights the next steps to be taken for properly using the MICP method when other geosynthetics are used.

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“…1,4,5,[14][15][16][17] It also ensures high sustainability as stabilized roads by this technology can last for more than 50 years. 18,19 Biocementation occurs by the action of different enzymes, the most common is through urease-associated hydrolysis of urea in the soil yielding carbonate and ammonia (eqn (1)). The resulting carbonate interacts with soil calcium forming the very slightly soluble calcium carbonate (eqn (2)).…”

Section: Introductionmentioning

confidence: 99%

Biocementation of soil by calcite/aragonite precipitation usingPseudomonas azotoformansandCitrobacter freundiiderived enzymes

et al. 2019

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Bacteria-Induced Cementation in Sandy Soils

Cited by 13 publications

References 27 publications

Microbial-Induced Carbonate Precipitation Using a Sustainable Treatment Technique

Microbial-Induced Carbonate Precipitation Using a Sustainable Treatment Technique

Applications of Microbially Induced Calcium Carbonate Precipitation on Non-Woven Geotextiles

Biocementation of soil by calcite/aragonite precipitation usingPseudomonas azotoformansandCitrobacter freundiiderived enzymes

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