Results 21 to 30 of about 636,297 (295)
Damping Properties and Microstructure Analysis of Microbial Consolidated Rubber Sand
Advances in Civil Engineering, 2021 Up to now, there are few reports on the application of microbial-induced calcium carbonate precipitation (MICP) consolidated rubber sand. By means of uniaxial or cyclic loading test and SEM test, the consolidation effect of rubber sand samples with ...
Pei Li
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Multivariate experimental study on soybean urease induced calcium carbonate precipitation
Rock and Soil Mechanics, 2022 The plant-derived enzyme induced calcium carbonate precipitation (EICP) can significantly improve the engineering mechanical properties of sand. However, there is no specification for choosing the parameter value in the specific operation, and the ...
CUI Meng +6 more
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In situ soil cementation with ureolytic bacteria by surface percolation [PDF]
, 2012 The possibility of using microbiological processes to improve the mechanical properties of soil by undisturbed in situ application has gained attention over recent years. This paper describes a new variation of in situ soil reinforcement technology based
Cheng, L. +2 more
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ENGINEERING PROPERTIES OF CARBONATE SANDS AND SKIN FRICTION OF PILE IN SANDS
Doboku Gakkai Ronbunshu, 1995 本研究では, チイビシ砂及び Dogs Bay 砂の2種類のカーボネイト系の砂を対象に三軸圧縮試験, 一面せん断試験及び滑らかで小さな模型杭の載荷実験を行い, 力学特性の違いが杭の周面摩擦力の発現に及ぼす影響を実験的に検討した. 主な結果をまとめると次のようになる. 1) チイビシ砂は Dogs Bay 砂よりも間隙比は小さいが, 間隙比の変化に対する拘束圧依存性は大きい。2) 一面せん断試験で得られた有効摩擦角は試料によって異なり, チイビシ砂が Dogs Bay 砂よりも大きい。3) 杭周面摩擦力の発現には側圧依存性がみられるが, 試料によって摩擦力側圧曲線の形状に違いが見られる。この傾向は一面せん断試験から得られた結果とよい対応を示すことが明らかになった.
Kunihiro Tanaka +3 more
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Creation of an artificial carbonate sand
This paper deals with the efficacy of creating artificial carbonate sand from crushed chalk to model the natural carbonate sand. Direct drained shear using 100 mm shear box and compressibility tests using 150 mm Rowe cell have been performed on ...
Glendinning S, Grine K
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Effect of Nutrient Solution Composition on Bio-Cemented Sand
Crystals, 2021 Microbial-induced carbonate precipitation is an environmentally friendly foundation treatment technology that effectively improves soil engineering performance. The various nutrient components of liquid curing compounds significantly influence the curing
Shihua Liang +3 more
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Frontiers in Physics, 2022 Calcium carbonate precipitation and crystallization induced by urease enzyme to solidify soil is known as biocement technology. The uses of waste and cheap materials can make this technology more cost-effective and practical for applications.
Jia He +3 more
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CPT calibration and analysis for a carbonate sand [PDF]
Géotechnique, 2018 This paper describes a project-based cone penetration test (CPT) calibration on a carbonate sand fill that was hydraulically placed and subsequently densified by vibrocompaction. The project involved the development of an artificial island constructed offshore from the United Arab Emirates for oil and gas production.
D. GIRETTI +3 more
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absorption for calcium carbonate precipitation in sand
, 2019 The microbial‐induced calcite precipitation (MICP) process for ground improvement uses microorganisms to hydrolyze urea, producing carbonate ions to induce in situ calcium carbonate (CaCO3) precipitation in soil to improve its strength.
Hashim, SS +7 more
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Bio-Cementation of Sandy Soil through Bacterial Processing to Precipitate Carbonate
مجلة النهرين للعلوم الهندسية, 2020 Bio-cement built on microbial induced carbonate precipitation MICP, be able to consolidate the loose grains and can applied for soil reinforcement. In this study, the performing of an ureolytic Sporosarcina Pasteurii for sand stabilization was estimated.
Layth K. Shannoon, Mohammad A. Ibrahim
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