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1/8/2018#0183;#32;Although, MICP is a widely explored biocementation method, it has some disadvantages. Plantderived urease may offer many benefits over microbial urease to induce carbonate cementation (Kavazanjian and Karatas, 2008, Hamdan et al., 2013). Therefore, it is advantageous to further investigate different techniques, such as ecofriendly methods, for different applications in the field of
24/6/2019#0183;#32;In EICP, free urease enzyme is used to accelerate the reaction between calcium chloride and urea to induce calcium carbonate precipitation in soil pores. A laboratory study was conducted to investigate the efficiency of three different biochars produced at different temperatures (300, 500, and 700 #176;C) and applied at 1% to the soil.
14/12/2020#0183;#32;Enzymatic induced calcite precipitation to stabilise compacted earth materials. Use of plantderived urease (from crude liquid extract or fine powder of soybeans). Definition of the key factors affecting the kinetics of urea hydrolysis. Improvement of strength and
derived urease induced carbonate cementation has been proposed as a promising application for the stabilization of soil against wind and surface water erosion [23].
Sand Cementation Test using PlantDerived Urease and Calcium Phosphate Compound R. A. N. Dilrukshi1,+, Jun Watanabe1 and Satoru Kawasaki2 1Graduate School of
24/6/2019#0183;#32;In EICP, free urease enzyme is used to accelerate the reaction between calcium chloride and urea to induce calcium carbonate precipitation in soil pores. A laboratory study was conducted to investigate the efficiency of three different biochars produced at different temperatures (300, 500, and 700 #176;C) and applied at 1% to the soil.
Carbonate Cementation via Plant Derived Urease Cimentation carbonat#233;e par lutilisation dur#233;ase issue de plantes Hamdan N., Kavazanjian Jr. E., ODonnell S. School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ ; PH: (480)
3/7/2019#0183;#32;Hamdan N, Kavazanjian Jr E, ODonnell S (2013) Carbonate cementation via plant derived urease. In Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, (pp 26) Google Scholar.
The use of plantderived urease enzyme to induce calcium carbonate (CaCO 3) cementation has been demonstrated through laboratory column tests. Benefits of the use of plantderived urease over the use of microbiallygenerated urease to induce carbonate cementation include the small size of the enzyme, which permits penetration into finer grained soils and makes the process less sensitive to bioplugging,
20/12/2019#0183;#32;Hamdan N, Kavazanjian Jr E, ODonnell S (2013) Carbonate cementation via plant derived urease. In: Proceedings of the 18th international conference on soil mechanics and geotechnical engineering, Paris. 14. Kavazanjian E Jr, Almajed A, Hamdan N (2017) Bioinspired soil improvement using EICP soil columns and soil nails. Grouting 2017:1322
The UCS of the sand test pieces cemented by CPC with urease containing plant extract and urea were larger than that of the test pieces without plant extract. Furthermore, the best CPC solution mixture for highest cementation was with the concentration of Ca/P ratio of In addition, pH content was measured after UCS test.
effect of cementation reagents concentrations on This study examines the microbial carbonate precipitations in tropical residual soil via urea hydrolysis. An isolate of urease active strain of Klebsiella pneumoniae UM123 was used to precipitates calcite into the soil with the aim of improving the strength and reducing the hydraulic conductivity of the soil.
plantderived urease as a promising alternative for microbial urease for making biocement. CPCs are also considered as a cementing material similar to carbonates. CPC precipitation mechanism is...
Carbonate precipitation via hydrolysis of urea is a potentially inexpensive cementation method. Uses common materials (CaCl2, urea) amp; the enzyme urease. Requires less energy and processing steps than Portland cement. Plant derived urease is renewable amp; biodegradable. Smaller CO2footprint than cement.
6/6/2019#0183;#32;Carbonate cementation via plant derived urease. In Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris
Benefits of the use of plantderived urease over the use of microbiallygenerated urease to induce carbonate cementation include the small size of the enzyme, which permits penetration into finer grained soils and makes the process less sensitive to bioplugging, and the availability of of the carbon in the substrate for conversion to CaCO3.
Plantderived urease induced sand cementation is a novel biogeotechnical engineering application in the field of geotechnical engineering.
An extract of the indigenous plant jack bean ( Canavalia ensiformis) was used to produce calcite, an effective biomaterial. The formation of calcite using this extract was compared, under stable conditions, to that using commercially available purified urease. Xray diffraction and scanning electron microscopy were employed to elucidate the
Carbonate Cementation via Plant Derived Urease. applications pratiques pour lutilisation de la pr#233;cipitation carbonat#233;e #171; ur#233;olytique #187; en utilisant lur#233;ase issue de plantes. KEYWORDS: carbonate, cementation, urease, calcite, soil improvement 1. INTRODUCTION Background The potential for using plantderived urease enzyme to cement.
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