Biogeotechnics最新文献

{"title":"Improved methods, properties, applications and prospects of microbial induced carbonate precipitation (MICP) treated soil: A review","authors":"Xuanshuo Zhang ,&nbsp;Hongyu Wang ,&nbsp;Ya Wang ,&nbsp;Jinghui Wang ,&nbsp;Jing Cao ,&nbsp;Gang Zhang","doi":"10.1016/j.bgtech.2024.100123","DOIUrl":"10.1016/j.bgtech.2024.100123","url":null,"abstract":"<div><div>Soil improvement is one of the most important issues in geotechnical engineering practice. The wide application of traditional improvement techniques (cement/chemical materials) are limited due to damage ecological environment and intensify carbon emissions. However, the use of microbially induced calcium carbonate precipitation (MICP) to obtain bio-cement is a novel technique with the potential to induce soil stability, providing a low-carbon, environment-friendly, and sustainable integrated solution for some geotechnical engineering problems in the environment. This paper presents a comprehensive review of the latest progress in soil improvement based on the MICP strategy. It systematically summarizes and overviews the mineralization mechanism, influencing factors, improved methods, engineering characteristics, and current field application status of the MICP. Additionally, it also explores the limitations and correspondingly proposes prospective applications via the MICP approach for soil improvement. This review indicates that the utilization of different environmental calcium-based wastes in MICP and combination of materials and MICP are conducive to meeting engineering and market demand. Furthermore, we recommend and encourage global collaborative study and practice with a view to commercializing MICP technique in the future. The current review purports to provide insights for engineers and interdisciplinary researchers, and guidance for future engineering applications.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 1","pages":"Article 100123"},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141853611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biogenic construction: The new era of civil engineering","authors":"Hanlong Liu","doi":"10.1016/j.bgtech.2024.100130","DOIUrl":"10.1016/j.bgtech.2024.100130","url":null,"abstract":"<div><div>With the increasing demand for buildings and infrastructures and the mounting challenges associated with the current construction technologies such as high emission, high pollution, and high energy consumption, the civil engineering profession is at the crossroad for a transformation or upgrading before it can be put into tasks for these challenges. Inspired by the concept of harmonious coexistence between humans and nature, a new concept, biogenic construction, for civil engineering is proposed in this paper. The definition of biogenic construction is given. The framework and four components of biogenic construction are established. These include microbial construction, plant construction, animal construction, and bioinspired construction. Examples of each component are given. A new construction system for creating a more eco-friendly, healthier, and more sustainable environment for future civil engineering developments is also proposed.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 1","pages":"Article 100130"},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141842243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of grass plantation on the rainfall-induced instability of gentle loose fill slope","authors":"Pei Tai ,&nbsp;Fan Wu ,&nbsp;Bohan Bai ,&nbsp;Zhaofeng Li ,&nbsp;Rui Chen ,&nbsp;Lulu Zhang","doi":"10.1016/j.bgtech.2024.100101","DOIUrl":"10.1016/j.bgtech.2024.100101","url":null,"abstract":"<div><p>The understanding of rainfall-induced landslides on gentle, loose-fill slopes is limited in comparison to steep slopes. Hence, two physical model tests were conducted on silty sand slopes under continuous rainfall: one on a bare slope and the other on a slope planted with ryegrass. The slope angle of 25° is much lower than the internal friction angle of slope material (34.3°), which makes the model test fall well into the category of gentle slope. For the initially unsaturated bare slope, a rainfall event with return period of 18 years could trigger a rapid and retrogressive global sliding, which differs from previous findings that gentle slopes would only experience shallow failure. A sudden increase in pore-water pressure was simultaneously observed, which might be generated by the wetting-induced collapse of unsaturated loose soil. On the other hand, the stability of the slope with grass plantation was significantly enhanced, and it was able to withstand rainfall event more severe than those with a return period of 100 years, with only minimal deformation. The results suggest that the gain in shear strength due to ryegrass roots surpasses the additional sliding force caused by the increased water retention capability. Additionally, it is found that the abrupt change in pore pressure was no longer indicative of slope failure in the case of the grass-reinforced slope.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"2 4","pages":"Article 100101"},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949929124000330/pdfft?md5=e559eef248da6ada511b94e9ec23f693&pid=1-s2.0-S2949929124000330-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of grassland vegetation roots on soil infiltration rate in Xiazangtan super large scale landslide distribution area in the upper reaches of the Yellow River, China","authors":"Peihao Zhang ,&nbsp;Guangyan Xing ,&nbsp;Xiasong Hu ,&nbsp;Changyi Liu ,&nbsp;Xilai Li ,&nbsp;Jimei Zhao ,&nbsp;Jiangtao Fu ,&nbsp;Haijing Lu ,&nbsp;Huatan Li ,&nbsp;Zhe Zhou ,&nbsp;Lei Yue ,&nbsp;Yabin Liu ,&nbsp;Guorong Li ,&nbsp;Haili Zhu","doi":"10.1016/j.bgtech.2024.100104","DOIUrl":"10.1016/j.bgtech.2024.100104","url":null,"abstract":"<div><p>In order to study the infiltration characteristics of grassland soil in the super large scale landslides distribution area in the upper reaches of the Yellow River, this study selected the Xiazangtan super large scale distribution area in Jianzha County as the study area. Through experiments and numerical simulations, plant roots characteristics, soil physical properties and infiltration characteristics of naturally grazed grassland and enclosed grassland with different slope directions were compared and analyzed, and the influence of rainfall on seepage field and stability of the two grassland slopes were discussed. The results show that the highest soil moisture infiltration capacity (FIR) is found on the shady slope of the enclosed grassland (2.25), followed by the sunny slope of the enclosed grassland (1.23) and the shady slope of the naturally grazed grassland (−0.87). Correlation analysis show that soil water content, root dry weight density, total soil porosity, number of forks and root length are positively correlated with infiltration rate (<em>P</em>＜0.05), whereas soil dry density is negatively correlated with infiltration rate (<em>P</em>＜0.05). The results of stepwise regression analyses show that soil water content, total soil porosity, root length and number of forks are the main factors affecting soil infiltration capacity. And the ability of roots to increase soil infiltration by improving soil properties is higher than the effect of roots itself. After 60 min of simulated rainfall, the safety factors of the shady slopes of naturally grazed grassland and enclosed grassland are reduced by 29.56% and 19.63%, respectively, comparing to those before rainfall. Therefore, in this study, the roots play a crucial role in regulating soil infiltration and enhance slope stability by increasing soil water content, soil total porosity and shear strength while decreasing soil dry density. The results of this study provide theoretical evidence and practical guidance for the effective prevention and control of secondary geological disasters such as soil erosion and shallow landslide on the slope of river banks in the study area by using plant ecological measures.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"2 4","pages":"Article 100104"},"PeriodicalIF":0.0,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949929124000366/pdfft?md5=32eff534fe5d0bbb5e86dc6c67130180&pid=1-s2.0-S2949929124000366-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porosity and bedding controls on bio-induced carbonate precipitation and mechanical properties of shale and dolomitic rocks: EICP vs MICP","authors":"Mary C. Ngoma ,&nbsp;Oladoyin Kolawole","doi":"10.1016/j.bgtech.2024.100102","DOIUrl":"10.1016/j.bgtech.2024.100102","url":null,"abstract":"<div><p>Biocementation is an emerging field within geotechnical engineering that focuses on harnessing microbiological activity to enhance the mechanical properties and behavior of rocks. It often relies on microbial-induced carbonate precipitation (MICP) or enzyme-induced carbonate precipitation (EICP) which utilizes biomineralization by promoting the generation of calcium carbonate (CaCO₃) within the pores of geomaterials (rock and soil). However, there is still a lack of knowledge about the effect of porosity and bedding on biocementation in rocks from a mechanistic view. This experimental study investigated the impact of porosity and bedding orientations on the mechanical response of rocks due to biocementations, using two distinct biocementation strategies (MICP and EICP) and characteristically low porosity but interbedded rocks (shale) and more porous but non-bedded (dolostone) rocks. We first conducted biocementation treatments (MICP and EICP) of rock samples over a distinct period and temperature. Subsequently, the rock strength (uniaxial compressive strength, <em>UCS</em>) was measured. Finally, we analyzed the pre- and post-treatment changes in the rock samples to better understand the effect of MICP and EICP biocementations on the mechanical response of the rock samples. The results indicate that biocementations in dolostones can improve the rock mechanical integrity (EICP: +58% <em>UCS</em>; MICP: +25% <em>UCS</em>). In shales, biocementations can either slightly improve (EICP: +1% <em>UCS</em>) or weaken the rock mechanical integrity (MICP: −39% <em>UCS</em>)<em>.</em> Further, results suggest that the major controlling mechanisms of biogeomechanical alterations due to MICP and EICP in rocks can be attributed to the inherent porosity, biocementation type, and bedding orientations, and in few cases the mechanisms can be swelling, osmotic suction, or pore pressurization. The findings in this study provide novel insights into the mechanical responses of rocks due to MICP and EICP biocementations.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"2 4","pages":"Article 100102"},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949929124000342/pdfft?md5=1b0d98ae6537e922cb84f6483aae4130&pid=1-s2.0-S2949929124000342-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficacy of milk powder additive in biocementation technique for soil stabilization","authors":"Jie Yin ,&nbsp;Lexuan Zhang ,&nbsp;Ke Zhang ,&nbsp;Cheng Zhang ,&nbsp;Yang Yang ,&nbsp;Mohamed A. Shahin ,&nbsp;Liang Cheng","doi":"10.1016/j.bgtech.2024.100111","DOIUrl":"10.1016/j.bgtech.2024.100111","url":null,"abstract":"<div><div>Microbial-Induced Carbonate Precipitation (MICP) is an emerging, environmental-friendly, and sustainable technology that has shown great potential for soil stabilization. However, its process efficiency has been recognized as a major challenge for its practical application in engineering. Non-fat powdered milk (NFPM) has been shown to have positive effects in enzymatical-induced carbonate precipitation (EICP), so in this study, we evaluated its use as an additive in the MICP process. A comparison between conventional MICP and NFPM-modified MICP was conducted, including chemical conversion efficiency, urea hydrolysis rate, and mechanical performance of sandy soils. A series of laboratory tests including precipitation analysis, unconfined compressive strength (UCS), and microstructure analysis were conducted. The results showed that the addition of NFPM could improve urease activity, enhance chemical conversion efficiency, and lead to superior strength improvement compared to conventional MICP. Microstructure and particle size analysis revealed that the presence of NFPM was beneficial for larger crystal cluster formation between sand grains, which could result in stronger bonds and better mechanical performance. In summary, this study indicates that the use of NFPM in MICP process can represent a more sustainable and economically viable approach for soil stabilization. The findings provide valuable information for engineers and researchers working in soil stabilization and environmental engineering, highlighting the potential of using natural additives such as NFPM to promote the sustainable development of MICP technique.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100111"},"PeriodicalIF":0.0,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141403995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bacterial attachment by crystal in MICP","authors":"","doi":"10.1016/j.bgtech.2024.100109","DOIUrl":"10.1016/j.bgtech.2024.100109","url":null,"abstract":"<div><p>Microbially induced calcium carbonate precipitation (MICP) is recognized as a promising technique for soil improvement. The morphological evolution of calcium carbonate (CaCO₃) crystals during the MICP process significantly impacts the engineering properties of biocemented soils. However, the morphological changes of CaCO₃ precipitates upon bacterial adsorption onto crystal surfaces have not been sufficiently studied. This study employs real-time laser scanning confocal microscopy (LSCM) to simultaneously monitor the dynamics of CaCO₃ growth and bacterial attachment during the MICP process, while fluorescence staining is used to differentiate between living and dead bacteria. The results indicate that during the initial stage of the MICP process, the predominant morphology of the CaCO₃ crystals was elliptical, with a minor fraction exhibiting a rhombohedral morphology. Over time, additional elliptical crystals gradually formed around the existing elliptical ones. As the crystals grew, certain bacteria in the vicinity of the crystals became adsorbed onto their surfaces, irrespective of bacterial viability. However, bacterial adsorption did not alter the morphology of the crystals. The study provides microscale insights into the mechanisms of bacterial attachment to CaCO₃ crystals during biomineralization.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"2 4","pages":"Article 100109"},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S294992912400041X/pdfft?md5=04dc589473fd579fb1f42bd12411b0c2&pid=1-s2.0-S294992912400041X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141391812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and optimization of biomimetic-chemically induced carbonate precipitation: A review of recent research","authors":"Yu Diao ,&nbsp;Jitao Bai ,&nbsp;Gang Zheng ,&nbsp;Qingsong Hu ,&nbsp;Pengjin Li ,&nbsp;Xuanqi Liu ,&nbsp;Wendi Hu ,&nbsp;Jianyou Huang","doi":"10.1016/j.bgtech.2024.100110","DOIUrl":"10.1016/j.bgtech.2024.100110","url":null,"abstract":"<div><div>With further investigation on biomineralization, biomimetic mineralization has been proposed in imitation of microorganism behavior, in which the mechanism of biomineralization is utilized for the control of the crystal growth to synthesize inorganic materials with special structures and superior physical-chemical properties. This review summarizes the recent advances in biomimetic-chemically induced carbonate precipitation (BCICP). BCICP is a biomimetic mineralization process induced by calcium carbonate crystal modifiers, which directly regulates the metathesis reaction of calcium salts with carbonates in soils to improve the soil properties. Several crystal modifiers for BCICP, including the aspartic acid (organic), the boric acid (inorganic), and the polyacrylic acid (polymer), are reviewed, and the biomimetic mineralization mechanism is introduced. In addition, current findings about BCICP in cementitious materials, soil reinforcement, dust suppression, as well as other fields are discussed, aiming to give deeper insights into the further development and application of BCICP.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 1","pages":"Article 100110"},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141279618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of root morphological and architectural traits: Insights into root-inspired anchorage and foundation systems","authors":"Wengang Zhang ,&nbsp;Ruijie Huang ,&nbsp;Jiaying Xiang ,&nbsp;Ningning Zhang ,&nbsp;Matteo Oryem Ciantia ,&nbsp;Leilei Liu ,&nbsp;Jian Yin ,&nbsp;Changbing Qin","doi":"10.1016/j.bgtech.2024.100107","DOIUrl":"10.1016/j.bgtech.2024.100107","url":null,"abstract":"","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 1","pages":"Article 100107"},"PeriodicalIF":0.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasibility study of enhancing enzyme-induced carbonate precipitation with eggshell waste for sand solidification","authors":"Zhen Yan ,&nbsp;Kazunori Nakashima ,&nbsp;Chikara Takano ,&nbsp;Satoru Kawasaki","doi":"10.1016/j.bgtech.2024.100108","DOIUrl":"10.1016/j.bgtech.2024.100108","url":null,"abstract":"<div><p>Utilizing Enzyme-Induced Calcium Carbonate Precipitation (EICP) reinforcement technology has emerged as an innovative approach for soil improvement. In this study, kitchen waste eggshell powder was used as an additive material for EICP. The high external surface area and affinity for calcium ions of eggshell powder, which render it a suitable nucleation site for calcium carbonate precipitation. Experimental results demonstrate that the incorporation of eggshell powder, by increasing the number of nucleation sites and promoting calcium carbonate precipitation, reduces the inhibition of enzyme products, modulates the precipitation pattern of calcium carbonate, improves particle size distribution, and consequently significantly enhances the unconfined compressive strength of the samples. Furthermore, a neutral pH is achieved within the reaction system without the addition of any acid, thus preventing significant ammonia emissions. This underscores the potential of kitchen waste eggshells for recycling in biocement applications.</p></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"2 4","pages":"Article 100108"},"PeriodicalIF":0.0,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949929124000408/pdfft?md5=31c66cfebad2ac171cb9b22d18ace9e3&pid=1-s2.0-S2949929124000408-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}