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Mechanical Performance of Biotreated Sandy Road Bases
Publisher: ASCE
Abstract: This study investigated the performance of microbially induced calcite precipitation (MICP) in reinforcing road bases reconstituted with calcareous or silica sands. Four testing models were prepared by the surface percolation ...
Strength and Kaolin Nucleation in Biotreated Coarse Sand
Publisher: ASCE
Abstract: Microbially induced carbonate precipitation (MICP) is an effective method for stabilizing sandy soil. However, this method is not effective for coarse sands. A kaolin-nucleating method was proposed in this study to improve ...
Variable Chain Confinement in Polymers With Nanosized Pores and Its Impact on Instability
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recent experiments and molecular dynamics simulations have proven that polymer chains are less confined in layers near the free surfaces of submicronnanosized pores. A recent model has incorporated this observed variable ...
Unconfined Compressive and Splitting Tensile Strength of Basalt Fiber–Reinforced Biocemented Sand
Publisher: American Society of Civil Engineers
Abstract: The strength properties of basalt fiber–reinforced biocemented (BFRB) sand specimens with various calcite contents and fiber contents are investigated through a series of unconfined compressive and splitting tensile tests. ...
Crystal Growth of MICP through Microfluidic Chip Tests
Publisher: ASCE
Abstract: A significant pressing issue in microbially induced calcium carbonate precipitation (MICP) is the characterization of the heterogeneous growth mechanics of calcium carbonate (CaCO3) crystals. This study aimed to visualize ...
Developing a 24-Hour Large-Scale Microscopic Traffic Simulation Model for the Before-and-After Study of a New Tolled Freeway in the Washington, DC–Baltimore Region
Publisher: American Society of Civil Engineers
Abstract: For determining highly disaggregate details about traffic dynamics, microscopic traffic simulation has long proven to be a valuable tool for the evaluation of development plans and operation/control strategies. With recent ...
Toe-Bearing Capacity of Precast Concrete Piles through Biogrouting Improvement
Publisher: ASCE
Abstract: This technical paper investigates the bearing performance of precast concrete piles embedded within calcareous sands with biogrouting at the pile toe. Loading tests of biogrout-improved and unimproved concrete model piles ...