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Full-Text Articles in Geotechnical Engineering
Early-Age Strength And Failure Characteristics Of 3d Printable Polymer Concrete: Numerical Modelling And Experimental Testing, Mohammad Amin Dehghani Najvani
Early-Age Strength And Failure Characteristics Of 3d Printable Polymer Concrete: Numerical Modelling And Experimental Testing, Mohammad Amin Dehghani Najvani
Civil Engineering ETDs
The time-dependent rheological and early-age strength parameters of Polymer concrete (PC) were investigated. PC flow decreased, and the static yield stress and thixotropy increased as the specimen aged, while the dynamic yield stress remained unchanged. The study found that the Herschel-Bulkley model can accurately describe the PC’s rheological behavior over time. The change in cohesion strength and internal friction angle over time was observed using uniaxial unconfined compression and direct shear tests of fresh PC. A time-dependent MohrCoulomb failure criterion was established. Temperature analysis was used to determine the gel time and explain the evolution of the time-dependent early-age strength …
Mechanical Properties Of Sand 3d Printed Rock-Like Samples Based On Different Post-Processing Methods, Wei Tian, Xiao-Hui Wang, Wei Yun, Xu Cheng
Mechanical Properties Of Sand 3d Printed Rock-Like Samples Based On Different Post-Processing Methods, Wei Tian, Xiao-Hui Wang, Wei Yun, Xu Cheng
Rock and Soil Mechanics
3D printing, a rapid prototyping technology, has great potential for applications in laboratory rock tests, but the low strength and stiffness of 3D printed samples have been one of the key problems that need to be addressed. In order to find a way to enhance the strength and stiffness of 3D printed rock-like samples, GS19 sand and furan resin were selected as printing materials, and sand 3D printed rock-like samples were used as research objects. Based on this, the samples were post-processed using three different methods: vacuum infiltration, low-temperature treatment, and combination of infiltration and low-temperature. Uniaxial compression tests were …
Investigation Into The Load Transfer Mechanism Of Trees To Develop An Innovative Foundation Configuration Using 3d Finite Element Modeling, Kaleb Boland
All Theses
This study was inspired by a tree’s reliance on its root system that enables it to withstand a natural disaster, such as an extreme hydroclimatic event or hurricane. This curiosity has led to an investigation into what makes this possible, developing a new and innovative foundation configuration for infrastructure systems, and a new possible construction material and method. This study provides results on a material that does not have conventional testing procedures or standards: a tree root. The trees studied are common to the upstate of South Carolina, which are Pine, Sweetgum, and White Oak. According to the results, on …
Experimental Study Of Micp-Treated Sand Enhanced By Pozzolan, Yu Xiong, Hua-Feng Deng, Jian-Lin Li, Lei Cheng, Wen-Xi Zhu
Experimental Study Of Micp-Treated Sand Enhanced By Pozzolan, Yu Xiong, Hua-Feng Deng, Jian-Lin Li, Lei Cheng, Wen-Xi Zhu
Rock and Soil Mechanics
In order to improve the reinforcement effect of microbially induced calcium carbonate precipitation (MICP) technology on sand, the test of MICP-treated sand reinforced by pozzolan was designed and carried out considering the porous structure and activity characteristics of pozzolan. The enhancement effect and enhancement mechanism of pozzolan on the MICP-treated sand were systematically analyzed by integrating macroscopic physical and mechanical tests and microscopic tests. The results showed that: 1) Pozzolan could significantly improve the bacteria fixation rate and cementation material production in the process of sand microbial reinforcement, and the optimal amount of pozzolan content was around 10%, which increased …
Research On The Mechanical Characteristics Of Granite Failure Process Under True Triaxial Stress Path, Jie Liu, Li-Ming Zhang, Yu Cong, Zai-Quan Wang
Research On The Mechanical Characteristics Of Granite Failure Process Under True Triaxial Stress Path, Jie Liu, Li-Ming Zhang, Yu Cong, Zai-Quan Wang
Rock and Soil Mechanics
No abstract provided.
Influencing Factors And Mechanism Analysis Of Strength Development Of Geopolymer Stabilized Sludge, Heng-Yu Zhou, Xiu-Shan Wang, Xing-Xing Hu, Zhi-Qi Xiong, Xiao-Yuan Zhang
Influencing Factors And Mechanism Analysis Of Strength Development Of Geopolymer Stabilized Sludge, Heng-Yu Zhou, Xiu-Shan Wang, Xing-Xing Hu, Zhi-Qi Xiong, Xiao-Yuan Zhang
Rock and Soil Mechanics
No abstract provided.
Experimental Study Of Dispersive Clay Modified By Calcium Lignosulfonate, Sheng-Ge Ji, Bao-Zhong Wang, Xiu-Juan Yang, Heng-Hui Fan
Experimental Study Of Dispersive Clay Modified By Calcium Lignosulfonate, Sheng-Ge Ji, Bao-Zhong Wang, Xiu-Juan Yang, Heng-Hui Fan
Rock and Soil Mechanics
Dispersive clay is a type of water-sensitive soil, which has the characteristics of dispersivity and material loss when encountering water. The influential factors and modification mechanism of dispersive clay modified by calcium lignosulfonate (CL) were studied using dispersivity test, mechanical property test, chemical property test, microstructure test and simulated rainfall scouring test. The test results indicated that with the increase in CL content, the dispersivity, slake durability and erosion resistance of the modified soil were gradually improved, and it had a good modification effect when the CL content reached 3.0%. The unconfined compressive strength (UCS) first increased and then decreased, …
Hysteresis Effect And Damping Characteristics Of Shale Under Saturated And Natural States, Chang-Bao Jiang, Cai Wei, Min-Ke Duan, Yu-Fei Chen, Tang Yu, Zheng-Ke Li
Hysteresis Effect And Damping Characteristics Of Shale Under Saturated And Natural States, Chang-Bao Jiang, Cai Wei, Min-Ke Duan, Yu-Fei Chen, Tang Yu, Zheng-Ke Li
Rock and Soil Mechanics
An RLW-2000 micro-computer servo-control rock triaxial testing machine was used to carry out triaxial cyclic loading and unloading experiments of saturated and natural shales under different confining pressures. The mechanical properties and hysteresis effects of two hydrated shales were analyzed. The evolution law of the damping ratio was discussed based on the energy principle. The experimental results show that as the cycle number increases, the cumulative residual strain increases gradually. The relative residual strain decreases first and then tends to a stable region, and finally increases rapidly prior to the rock damage. The deformation modulus of the saturated shale is …