Mechanical Behavior of Microbially Induced Calcite Precipitation Cemented Sand

2021 ◽  
Author(s):  
Igor Marasini de Rezende ◽  
Pedro Domingos Marques Prietto ◽  
Antônio Thomé ◽  
Francisco Dalla Rosa
Keyword(s):  
Mechanical Behavior ◽  
Calcite Precipitation ◽  
Cemented Sand ◽  
Microbially Induced Calcite Precipitation

scholarly journals A revised model for microbially induced calcite precipitation: Improvements and new insights based on recent experiments

2015 ◽  
Vol 51 (5) ◽  
pp. 3695-3715 ◽  
Author(s):  
Johannes Hommel ◽  
Ellen Lauchnor ◽  
Adrienne Phillips ◽  
Robin Gerlach ◽  
Alfred B. Cunningham ◽  
...  
Keyword(s):  
Calcite Precipitation ◽  
Microbially Induced Calcite Precipitation

Biocementation of Concrete Pavements Using Microbially Induced Calcite Precipitation

2017 ◽  
Vol 27 (7) ◽  
pp. 1331-1335 ◽  
Author(s):  
Jin-Hoon Jeong ◽  
Yoon-Soo Jo ◽  
Chang-Seon Park ◽  
Chang-Ho Kang ◽  
Jae-Seong So
Keyword(s):  
Concrete Pavements ◽  
Calcite Precipitation ◽  
Microbially Induced Calcite Precipitation

scholarly journals Mechanical Behavior of Cemented Sand Reinforced with Different Polymer Fibers

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Xiangfeng Lv ◽  
Xiaohui Yang ◽  
Hongyuan Zhou ◽  
Shuo Zhang
Keyword(s):  
Compressive Strength ◽  
Mechanical Behavior ◽  
Brittle Failure ◽  
Unconfined Compressive Strength ◽  
Polypropylene Fiber ◽  
Ductile Failure ◽  
Polymer Fibers ◽  
Chemical Compositions ◽  
Peak Strain ◽  
Cemented Sand

In this study, the specimens of cemented sand were prepared by reinforcing it separately with different contents (0.5%, 1.0%, 1.5%, and 2.0%) of three different polymer fibers (polyamide, polyester, and polypropylene) prepared as filaments of different lengths (6, 9, and 12 mm). Then, these specimens were tested, and the improvement effects of the three fibers on the engineering-mechanical behavior of the cemented sand were analyzed and compared. The different microstructures and chemical compositions of the fiber-reinforced cemented sand specimens were investigated using electron microscopy and X-ray diffraction. Compression tests were performed to obtain the stress-strain curves of the specimens. Comparative analysis was performed on the variation patterns of the mechanical parameters (such as unconfined compressive strength and peak strain) of the specimens. Quantitative analysis was performed on the effect of fiber content and fiber filament length on the failure mode of the specimens. It was shown that the inclusion of fibers led to a change from brittle failure to ductile failure. The macro- and microexperimental results revealed that polypropylene fiber had the best improvement effect on the mechanical behavior of the cemented sand, followed by polyester fiber and polyamide fiber. In particular, the cemented sand specimen reinforced with 1.5% polypropylene fiber prepared as 9 mm length filaments had a brittleness index of 0.0578, exhibited ductile failure (in contrast to the brittle failure of the nonreinforced cemented sand), and yielded the highest unconfined compressive strength and shear strength among the specimens.

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