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Civil and Environmental Engineering Commons™
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Full-Text Articles in Civil and Environmental Engineering
Additive Manufacturing Of Soil Using Bio-Cementation, Christina Childress
Additive Manufacturing Of Soil Using Bio-Cementation, Christina Childress
Graduate Theses and Dissertations
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 benefits and applications of MICP are broad, and this research seeks to broaden them further by developing a single-phase additive manufacturing application with no treatment time delay. This is done by analyzing layering behaviors of five USCS soil classifications (100 % Ottawa sand, sand clay mixtures, and 100% lean clay) which provides insight into process variables such as the solution volume and …
Fracturing Mechanism Of Rock-Like Specimens With Different Joint Densities Based On Dic Technology, Fei-Fei Qi, Ke Zhang, Jian-Bin Xie
Fracturing Mechanism Of Rock-Like Specimens With Different Joint Densities Based On Dic Technology, Fei-Fei Qi, Ke Zhang, Jian-Bin Xie
Rock and Soil Mechanics
In order to study the influence of joint density on the strength characteristics and failure modes of rock mass, the rock-like specimens with different joint densities were prepared by using 3D sand printing, with the quartz sand and furan resin being employed as the printing materials. The uniaxial compression test was performed on the 3D sand printed specimens, and the digital image correlation (DIC) method was used as a non-contact technique to monitor the full-field deformation. The crack initiation, propagation and coalescence behaviors were quantitatively analyzed from the micromechanics point of view. The results show that the shape of stress-strain …
Study On The Fracture Mechanism Of 3d-Printed-Joint Specimens Based On Dic Technology, Ai-Bing Jin, Shu-Liang Wang, Ben-Xin Wang, Hao Sun, Yi-Qing Zhao
Study On The Fracture Mechanism Of 3d-Printed-Joint Specimens Based On Dic Technology, Ai-Bing Jin, Shu-Liang Wang, Ben-Xin Wang, Hao Sun, Yi-Qing Zhao
Rock and Soil Mechanics
In order to accurately characterize the deformation and failure modes of prefabricated jointed rocks with different angles under uniaxial compression, a joint model based on 3D printing technology was used to simulate the structural surface in the rock mass. Rock specimens with precast joints with different angles were obtained by pouring cement mortar, and a uniaxial compression test was performed. At the same time, digital image correlation (DIC) technology was used to observe and analyze the process of crack formation, propagation, and penetration in the test specimen. The results showed that as the angle of prefabricated joints increased from 0° …
Deformation And Fracturing Characteristics Of Fracture Network Model And Influence Of Filling Based On 3d Printing And Dic Technologies, Ke Zhang, Fei-Fei Qi, Yu-Long Chen
Deformation And Fracturing Characteristics Of Fracture Network Model And Influence Of Filling Based On 3d Printing And Dic Technologies, Ke Zhang, Fei-Fei Qi, Yu-Long Chen
Rock and Soil Mechanics
Due to the complexity of fracture distribution in engineering rock mass, the physical modeling of fracture network is one of the key problems in rock mechanics experiments. In this study, a 3D printing method of fracture network model based on water-soluble materials with polyactic acid materials as supporting base is proposed. Based on the water solubility of printing material, a method for preparing rock-like model specimens containing fracture network is established. Through digital image correlation (DIC) method, the deformation and fracturing characteristics of rock-like model specimens during loading process are quantitatively studied, and the influence law of filling material is …