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Showing 1 to 20 of 20 for “"MICP"”.
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Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands
… induced calcium carbonate (CaCO3) precipitation (MICP) could be used to enhance the erosion performance of soils. This research investigates the influence of the CaCO3 microstructure on the macromechanical erosion response of fine sands by combining instrumental techniques for characterisation, …
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Microbial-Induced Calcite Precipitation in soils: use of alternative raw materials and analysis of environmental implications
Microbial-Induced Calcite Precipitation (MICP) is a biogeochemical process that induces the precipitation of calcium carbonate minerals as a result of microbial activity. In MICP via urea hydrolysis, urea, calcium, and simple carbon and nitrogen chemical compounds are supplied to stimulate …
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Microbial-Induced Calcium Carbonate Precipitation: from micro to macro scale
… Calcium Carbonate (CaCO3) Precipitation (MICP) is a biological process in which microbial activities alter the surrounding aqueous environment and induce CaCO3 precipitation. Because the formed CaCO3 crystals can bond soil particles and improve the mechanical properties of soils such as …
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Mixed-integer convex optimization : outer approximation algorithms and modeling power
… or mixed-integer convex programming (MICP), the class of optimization problems where one seeks to minimize a convex objective function subject to convex constraints and integrality restrictions on a subset of the variables. We focus on two broad and complementary questions on MICP. The …
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Investigating the feasibility of implementing microbially induced calcite precipitation to stabilize sand, clay and gold tailings
Microbially Induced Calcite Precipitation (MICP) is an emerging bio-mediated technology which has been successfully applied in soil improvement research. MICP uses the enzyme urease produced from bacteria to breakdown urea into carbonate ions. These carbonate ions combine with free calcium ions to …
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Improving Erosion Resistance and Revegetation of Wildfire-Altered Soils Using Microbial Induced Calcite Precipitation
… life. Microbial Induced Calcite Precipitation (MICP) was found to be a sustainable treatment method for enhancing soil stability and reducing erodibility. MICP employs naturally existing microorganisms to precipitate calcium carbonate, which binds soil particles together. However previous …
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A technical and economic feasibility study on repurposing copper mine tailings via microbial induced calcium carbonate precipitation
… induced calcium carbonate precipitation (MICP) bio-bricks as a replacement for traditional bricks. MICP produced bio-bricks are formed by exploiting the ability of the microorganism, Sporosarcina pasteurii, to produce a biocement capable of binding sand particles (or any aggregate) …
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Manufacturing bio-tiles
… induced calcium carbonate (CaCO3) precipitation (MICP). This work aimed to determine whether bio-tiles that meet the strength requirements of conventional ceramic tiles could be met using the ureolysis MICP pathway. The ureolytic activity of Sporosarcina pasteurii was controlled by centrifuging …
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Diagenesis And Controls On Porosity And Permeability In The Upper San Andres Formation Of West Texas
… thin section petrography, XRD, XRF, and MICP. Results indicate that dolomitization enhances porosity, with intercrystalline and moldic porosity being dominant, while late-stage cementation and compaction reduce permeability. XRD reveals variations in clay and dolomite content correlating …
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Graphs of Convex Sets with Applications to Optimal Control and Motion Planning
… as an efficient Mixed-Integer Convex Program (MICP). This MICP can then be solved to global optimality using common branch-and-bound solvers, or approximately by rounding the solution of its convex relaxation. Importantly, both the formulation of the MICP and its solution are fully automatic, …
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Manufacturing bio-bricks using microbial induced calcium carbonate precipitation and human urine
… induced calcium carbonate precipitation (MICP) applications. MICP is a natural process that has the ability to produce bio-building material. Urine accounts for a small percentage of the total volume of domestic wastewater but contains a large percentage of the nutrients wastewater …
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Additive Manufacturing of Soil Using Bio-Cementation
<p>Microbially Induced Calcite Precipitation (MICP) is an emerging soil treatment technique that is proven to increase strength, decrease erosion, reduce liquefaction risk, enhance slope stability, decrease compressibility, decrease swelling potential, and overall create a more competent soil. The …
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Improving Reservoir Simulation Models by Incorporating Rock Types
… data. Mercury Injection Capillary Pressure (MICP) data was studied to classify rocks for further assessment of properties. This thesis work was further used in selection of good quality rock samples for which laboratory experiments were done to understand their properties. Concept of rock …
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Permeability, Pore Body, and Pore Throat Size Distributions from 2D Image Analysis: Comparison with Results from 3D Imaging and Laboratory Measurements
… (NMR), and Mercury Injected Capillary Pressure (MICP) laboratory measurements. Watershed segmentation was used to divide the segmented pores into pore bodies and pore throats. However, pore body and pore throat sizes change as a function of input parameters to the watershed algorithm. To optimize …
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Petrographic and petrophysical characterization of the Eagle Ford Shale in La Salle and Gonzales counties, Gulf Coast Region, Texas
… (WIP), mercury injection capillary pressure (MICP) and scanning electron microscopy (SEM). Total porosity results indicated that WIP overstates the total porosity when clay content is above 50 wt. %. MICP shows more reliable total porosity values where mineralogy does not apparently affect the …
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Optimization-based control and planning for highly dynamic legged locomotion in complex environments
… by solving mixed-integer convex programs (MICP) without requiring any initial guess from the operator. We further reduce the computational expense of long-horizon planning by leveraging the benefits of both optimization and sampling-based approaches for a simple legged robot. Finally, we …
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Permanence and Life Cycle Performance of Biocementation Soil Improvement
Microbially Induced Calcite Precipitation (MICP) is a bio-mediated technology that can improve the engineering properties of granular soils through the generation of calcium carbonate minerals on soil particles surfaces and at interparticle contacts. The process can offer an environmentally …
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Biocementation of Road Foundations: Element Testing, Physical Modelling, and Micro-Scale Characterisation
… microbially induced carbonate precipitation (MICP), a bio-inspired technique leveraging bio-mineralised CaCO₃ to stabilise granular materials and soils, offers a promising solution. This research therefore explores the application of this technique to improve road foundations. A crushed …
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Hydraulic fracturing of artificially generated soft sandstones
… via microbially induced carbonate precipitation (MICP), providing virtually limitless quantities and had customisable characteristics, allowing relevant structural parameters to be varied independently, and hence isolating their effects. The method was applied to produce realistic weak …
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Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates
Researchers have recently demonstrated the capabilities of microbially-induced calcium carbonate precipitation to fill and seal cracks in cementitious materials. However, the mechanical strength of microbially-induced crack healing is seldom investigated, especially at the fundamental level. In an …