Strength and durability of biocemented sands: Wetting-drying cycles, ageing effects, and liquefaction resistance

Sharma, Meghna; Satyam, Neelima

doi:10.1016/j.geoderma.2021.115359

Cited by 49 publications

(10 citation statements)

References 61 publications

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“…This optimized protocol might help to improve the results of research investigating MICP for production of novel construction materials based on MICP. The results could also be of interest for other fields of application of MICP like the granulometric stabilization of soil for unsealed road construction [49] or the improvement of liquefaction resistance [12,13]. For that, further parameter like stiffness, erosion resistance, permeability and shear strength after treatment with this optimized protocol need to be evaluated and compared to literature protocols.…”

Section: Comparison Of Three Cementation Solutionsmentioning

confidence: 99%

“…Previous studies showed that MICP can improve the strength of construction material like sandstone and cement mortar [5,6], to repair cracks in these materials [7,8] and to produce construction material like concrete [9][10][11]. Furthermore, MICP can be used to improve the resistance of soils to earthquake-induced liquefaction [12,13] and can be utilized for the mitigation of wind erosion of soil [14]. The ureolytic hydrolysation of urea is the most common used mechanism for MICP [15,16] because it is easy to control [17].…”

Section: Article 2 Introductionmentioning

confidence: 99%

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Optimizing compressive strength of sand treated with MICP using response surface methodology

et al. 2022

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In the present study, the optimization of the microbiologically induced calcium carbonate precipitation (MICP) to produce biosandstone regarding the compressive strength is shown. For the biosandstone production, quartz sand was treated sequentially with the ureolytic microorganism Sporosarcina pasteurii (ATCC 11859) and a reagent containing urea and calcium chloride. Response surface methodology (RSM) was applied to investigate the influence of urea concentration, calcium chloride concentration and the volume of cell suspension on the compressive strength of produced biosandstone. A central composite design (CCD) was employed, and the resulting experimental data applied to a quadratic model. The statistical significance of the model was verified by experimental data (R2 = 0.9305). Optimized values for the concentration of urea and calcium chloride were 1492 mM and 1391 mM. For the volume of cell suspension during treatment 7.47 mL was determined as the optimum. Specimen treated under these conditions achieved a compressive strength of 1877 ± 240 kPa. This is an improvement of 144% over specimen treated with a reagent that is commonly used in literature (1000 mM urea/1000 mM CaCl2). This protocol allows for a more efficient production of biosandstone in future research regarding MICP.

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Section: Comparison Of Three Cementation Solutionsmentioning

confidence: 99%

Section: Article 2 Introductionmentioning

confidence: 99%

Optimizing compressive strength of sand treated with MICP using response surface methodology

et al. 2022

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“…Gowthaman et al [62] found that when subjected to 25 cycles of frost, samples bonded to an average of 11-13% (CaCO 3 mass) were high eroded (50% mass loss), while samples bonded to 20-23% only slightly eroded (2% mass loss). Sharma et al [64] found that after 20 wet-dry cycles, the mass loss rate of samples with calcite precipitation amount (10.2-12%) was less than 3%, and the total mass of the minimum precipitation samples (3.25-3.89%) remained above 70%. Gowthaman et al [65] studied the influence of acid rain conditions on the durability of MICP-treated slope soil and found that when CaCO 3 content was 12.5%, the soil loss rate was 19.9%, while when cemented CaCO 3 content was 22.5%, soil loss rate decreased to 5.4%.…”

Section: Microbial Sand Consolidationmentioning

confidence: 99%

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

et al. 2021

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Microbially induced carbonate precipitation (MICP) is a promising technology for solidifying sandy soil, ground improvement, repairing concrete cracks, and remediation of polluted land. By solidifying sand into soil capable of growing shrubs, MICP can facilitate peak and neutralization of CO2 emissions because each square meter of shrub can absorb 253.1 grams of CO2 per year. In this paper, based on the critical review of the microbial sources of solidified sandy soil, models used to predict the process of sand solidification and factors controlling the MICP process, current problems in microbial sand solidification are analyzed and future research directions, ideas and suggestions for the further study and application of MICP are provided. The following topics are considered worthy of study: (1) MICP methods for evenly distributing CaCO3 deposit; (2) minimizing NH4+ production during MICP; (3) mixed fermentation and interaction of internal and exogenous urea-producing bacteria; (4) MICP technology for field application under harsh conditions; (5) a hybrid solidification method by combining MICP with traditional sand barrier and chemical sand consolidation; and (6) numerical model to simulate the erosion resistance of sand treated by MICP.

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“…Engineering responses to biotreated soil are reported to be affected by many factors : (1) environmental, which includes rainwater flushing (Mortensen et al 2011;Tang et al 2020), contamination (Cheng and Shahin 2017;Yu and Jiang 2020), temperature (Ferris et al 2004;Nemati et al 2005;Sun et al 2019b), acid rain (Gowthaman et al 2021), oxygen content (Li et al 2017a;Su and Yang 2021), salinity (Mortensen et al 2011;Tang et al 2020), wetting-drying cycles (Sharma and Satyam 2021), and freezethaw cycles (Sharma et al 2021a;Sun et al 2021b); (2) treatment and testing factors, which include chemical concentrations (Al Qabany et al 2012;Zhao et al 2014), flow rate and direction of chemical media (Martinez et al 2013), calcium resource (Choi et al 2016b;Wang et al 2021b), treatment strategy (Al Qabany et al 2012;Martinez et al 2013;Cheng and Shahin 2016), urease source (e.g., indigenous or exogenous microbes) (Dhami et al 2013b;Park et al 2014;Cheng et al 2017a;Bibi et al 2018;Gomez et al 2018b;Nayanthara et al 2019;Marin et al 2021), bacterial concentration (Bosak et al 2004;Soon et al 2014), pH (Wu et al 2019a;Zehner et al 2020), and curing time for the soaking method (Zhao et al 2014;Sharma and Satyam 2021); (3) characteristics of base materials, which include particle mineralogy…”

Section: Introductionmentioning

confidence: 99%

Review of Strength Improvements of Biocemented Soils

Xiao

Zaman

et al. 2022

Int. J. Geomech.

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Microbially induced calcium carbonate precipitation (MICP) has attracted great attention recently for its ability to improve the mechanical properties of soils. Calcium carbonate (CaCO 3 ) precipitates that formed at the contact points and on the surface of particles or in the pore space of soil matrixes could increase the bonding strength, friction, and interlocking resistances due to the enhancement of the interparticle bonds, particle roughness, and packing density, and therefore, greatly improve the macroscopic performances of biocemented soils that were subjected to external loading. Strength is one of the key factors when determining the application of biotreatments in geotechnical engineering during the construction and operation periods. This study presented a systematic, objective, and extensive review of the strength of biocemented soils that was based on previous research. The improvement characteristics were comprehensively investigated under compression, tension, and static and cyclic shear conditions, for unconfined compressive (UCS), splitting tensile (STS), yielding, shear, and cyclic resistance strengths. Particle scale regimes were elaborated to interpret the improvement mechanism in the biotreatment and failure modes in biocemented specimens under external loading. Furthermore, the challenges of biocementation were discussed, and future investigations were envisioned.

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Strength and durability of biocemented sands: Wetting-drying cycles, ageing effects, and liquefaction resistance

Cited by 49 publications

References 61 publications

Optimizing compressive strength of sand treated with MICP using response surface methodology

Optimizing compressive strength of sand treated with MICP using response surface methodology

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

Review of Strength Improvements of Biocemented Soils

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