Study the grain size and infiltration method effects for sand soil improvement using the microbial method

Cheshomi, Akbar; Mansouri, Sina Sharif

doi:10.1080/01490451.2019.1705437

Cited by 8 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The test results based on a series of drained triaxial tests proved that the stress-strain behavior of biotreated sands could be influenced by the biotreatment level and p c (Feng and Montoya 2016;Lin et al 2016a;Gao et al 2019a;Liu et al 2019a;Nafisi et al 2019;Cui et al 2021a;Wu et al 2021). In addition, extensive direct shear tests have been performed to evaluate the shear resistance of biotreated soils along a given plane (Azadi et al 2017;Gui et al 2018;Hataf and Jamali 2018;Pakbaz et al 2018;Zamani and Montoya 2018;Amini Kiasari et al 2019;Khaleghi and Rowshanzamir 2019;Saquib Wani and Mir 2019;Cheshomi and Mansouri 2020;Pakbaz et al 2020;Riveros and Sadrekarimi 2020a). Based on the representative stress-horizontal displacement and vertical displacement-horizontal displacement curves for biotreated sands in direct shear tests that were conducted by Pakbaz et al (2018), the biotreatment could result in a significant strain softening, and the shear stress of biotreated sands at a given vertical stress was higher than that of their untreated counterparts.…”

Section: Compression and Shear Strength Of Biotreated Soilsmentioning

confidence: 99%

Review of Strength Improvements of Biocemented Soils

Xiao

Zaman

et al. 2022

Int. J. Geomech.

View full text Add to dashboard Cite

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.

show abstract

Section: Compression and Shear Strength Of Biotreated Soilsmentioning

confidence: 99%

Review of Strength Improvements of Biocemented Soils

Xiao

Zaman

et al. 2022

Int. J. Geomech.

View full text Add to dashboard Cite

show abstract

“…Amarakoon et al [23] found that the best range of average particle size of sand is 0.6mm~1.2mm, in the sand with average diameter of 0.2mm, because bacteria can not completely catalyze urea hydrolysis, the output of calcium carbonate is the least, and the strength is the lowest, only 1.4MPa. In addition, the change of particle size also affects the cohesion, internal friction angle and shear strength of sand, with the increase of sand particle size, the cohesion of reinforced sand sample is no longer zero, and the internal friction angle increases slightly, and the shear strength increases exponentially [24].…”

Section: Particle Sizementioning

confidence: 99%

Review on Research Progress of MICP Technology

Cui

Xiong

Lü

2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

MICP technology is a new technology proposed for soil reinforcement research in recent years, which has the advantages of environmental protection and sustainability. Through the review and analysis of domestic and foreign literature, the mechanism of microbial mineralization reaction and the research progress of domestic and foreign scholars were comprehensively summarized. This paper introduces the basic principle of urea hydrolysis in MICP technology, and expounds the control factors of microbial mineralization experiment and the practical application of this technology in engineering. Finally, the future development prospect of MICP technology is forecasted.

show abstract

“…MICP technology is used to conduct rock and soil plugging experiments [36][37][38][39][40][41][42][43], it can be seen that the microbial mineralization technology can form an effective plug, this method makes the geotechnical engineering be strengthened and seepage prevention, guaranteed its stability and durability. The particle size, particle size gradation and relative density of soil are important factors that determine the effect of soil solidi cation, the academic community has carried out soil column cementation experiments for soils of various particle sizes including kaolin, silt, ne sand, coarse sand and gravel [44][45][46][47][48][49][50], the particle size range of effective cementation is obtained, through the measurement of samples with different particle size gradations [51][52][53][54][55], it is found that the sand with coarser grains and good gradation has better curing effect after the improvement of MICP technology, the relationship between the relative density of the soil and the cementation strength was studied [56-61], and it was found that the cementation strength of the soil was positively correlated with its relative density.…”

Section: Introductionmentioning

confidence: 99%

Influence of different particle size and rock block proportion on microbial solidified soil-rock mixture

Sun

Tuo

et al. 2022

Preprint

View full text Add to dashboard Cite

This paper takes soil-rock mixture as the research object, and focuses on the application of mechanical properties of soil-rock mixture improved by microbial mineralization under the influence of different factors. In this paper, the prepared bacterial liquid and cementation reagent are used to mix the bacterial liquid and cementation reagent in the soil-rock mixture under different proportions，using the unconfined compressive strength test to find the optimal ratio of soil-rock consolidation, the microbial mineralization and cementation ability and physical and mechanical properties of soil-rock mixture under the influence of rock block proportion and particle size were discussed. The results show that the soil-rock mixture is not a uniform carrier of the medium, and the force on the surface of the sample is not uniform, with the increase of stress load, the stress-strain curve shows a sawtooth upward trend, peak value, etc.; the microbial cemented soil-rock mixture with the particle size of 0.2-0.4cm and 0.4-0.6cm under the rock block proportion of 50%, the unconfined compressive strength of the microbial cemented soil-rock mixture with a rock particle size of 0.6-0.9 cm reaches the highest at 60% rock block proportion ; when the stone content is 20%-50%, the unconfined compressive strength decreases with the increase of particle size; when the stone content is 60%, the value of unconfined compressive strength first decreases and then increases with the increase of particle size; both SEM and XRD test results proved that Sporosarcina pasteurii could effectively induce the formation of calcium carbonate, and crystallizes at the pores of the particles to improve the mechanical properties of the soil.

show abstract

Study the grain size and infiltration method effects for sand soil improvement using the microbial method

Cited by 8 publications

References 39 publications

Review of Strength Improvements of Biocemented Soils

Review of Strength Improvements of Biocemented Soils

Review on Research Progress of MICP Technology

Influence of different particle size and rock block proportion on microbial solidified soil-rock mixture

Contact Info

Product

Resources

About