Improvement of Fine Soils Through Microbial-Induced Calcite Precipitation

2018 ◽  
pp. 136-150
Author(s):  
Fuchen Teng ◽  
Shao-Chi Chien
Keyword(s):  
Calcite Precipitation

Simplified biogeochemical numerical model to predict pore fluid chemistry and calcite precipitation during biocementation of soil

2021 ◽  
Vol 14 (9) ◽  
Author(s):  
Meghna Sharma ◽  
Neelima Satyam ◽  
Nitin Tiwari ◽  
Shubham Sahu ◽  
Krishna R. Reddy
Keyword(s):  
Numerical Model ◽  
Pore Fluid ◽  
Calcite Precipitation ◽  
Fluid Chemistry ◽  
Pore Fluid Chemistry

scholarly journals Effects of Different Types of Fibers on the Physical and Mechanical Properties of MICP-Treated Calcareous Sand

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 268
Author(s):  
Jitong Zhao ◽  
Huawei Tong ◽  
Yi Shan ◽  
Jie Yuan ◽  
Qiuwang Peng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Glass Fiber ◽  
Physical And Mechanical Properties ◽  
Polyester Fiber ◽  
Engineering Properties ◽  
Fiber Types ◽  
Calcite Precipitation ◽  
Calcareous Sand ◽  
Hemp Fiber

Microbial-induced calcite precipitation (MICP) has been a promising method to improve geotechnical engineering properties through the precipitation of calcium carbonate (CaCO3) on the contact and surface of soil particles in recent years. In the present experiment, water absorption and unconfined compressive strength (UCS) tests were carried out to investigate the effects of three different fiber types (glass fiber, polyester fiber, and hemp fiber) on the physical and mechanical properties of MICP-treated calcareous sand. The fibers used were at 0%, 0.10%, 0.15%, 0.20%, 0.25%, 0.30%, 0.35%, and 0.40% relative to the weight of the sand. The results showed that the failure strain and ductility of the samples could be improved by adding fibers. Compared to biocemented sand (BS), the water absorption of these three fiber-reinforced biocemented sands were, respectively, decreased by 11.60%, 21.18%, and 7.29%. UCS was, respectively, increased by 24.20%, 60.76%, and 6.40%. Polyester fiber produced the best effect, followed by glass fiber and hemp fiber. The optimum contents of glass fiber and polyester fiber were 0.20% and 0.25%, respectively. The optimum content of hemp fiber was within the range of 0.20–0.25%. Light-emitting diode (LED) microscope and scanning electron microscope (SEM) images lead to the conclusion that only a little calcite precipitation had occurred around the hemp fiber, leading to a poor bonding effect compared to the glass and polyester fibers. It was therefore suggested that polyester fiber should be used to improve the properties of biocemented sand.

scholarly journals Low-temperature calcite precipitation in sand using CIPS

2016 ◽  
Vol 169 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Anders Palmén ◽  
Graham Price ◽  
Morgan Axelsson ◽  
Stefan Larsson
Keyword(s):  
Low Temperature ◽  
Calcite Precipitation

Enhancing the Strength of Sandy Soil Through Enzyme-Induced Calcite Precipitation

2021 ◽  
Vol 7 (2) ◽  
Author(s):  
Abubakar Sadiq Muhammed ◽  
Khairul Anuar Kassim ◽  
Muttaqa U. Zango ◽  
Kamarudin Ahmad ◽  
Jodin Makinda
Keyword(s):  
Sandy Soil ◽  
Calcite Precipitation

Chemical Evolution of the System Calcite–Gypsum–Water

1973 ◽  
Vol 10 (2) ◽  
pp. 306-315 ◽  
Author(s):  
T. M. L. Wigley
Keyword(s):  
Carbon Dioxide ◽  
Chemical Evolution ◽  
Degree Of Saturation ◽  
Carbon Dioxide Content ◽  
Calcite Precipitation ◽  
Arbitrary Temperature

The effect of the addition of gypsum to a solution of calcite in water (or the addition of calcite to a solution of gypsum in water) is determined theoretically for arbitrary temperature, carbon dioxide content, and degree of saturation with respect to calcite (or gypsum). The results can be used to study the chemical evolution of waters flowing through alternating gypsum and limestone strata, to predict conditions which will lead to the precipitation of calcite and/or gypsum, and to predict the chemical evolution of evaporating calcite–gypsum solutions. It is shown that under some circumstances, simultaneous gypsum (or calcite) precipitation and calcite (or gypsum) solution may occur. Coprecipitation of gypsum and calcite is found to be unavoidable if a solution is evaporated to dryness, although the initial precipitate will be a single mineral. The methods used and many of the conclusions drawn are applicable to other systems of two or more minerals.

Sedimentary Phosphate Fractions Related to Calcite Precipitation in an Eutrophic Hardwater Lake (Lake Alserio, Northern Italy)

2006 ◽  
Vol 35 (1) ◽  
pp. 55-64 ◽  
Author(s):  
I. de Vicente ◽  
K. Cattaneo ◽  
L. Cruz-Pizarro ◽  
A. Brauer ◽  
P. Guilizzoni
Keyword(s):  
Northern Italy ◽  
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

scholarly journals Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in a micro-fluidic cell

2020 ◽  
Author(s):  
Felix Weinhardt ◽  
Holger Class ◽  
Samaneh Vahid Dastjerdi ◽  
Nikolaos K. Karadimitriou ◽  
Dongwon Lee ◽  
...  
Keyword(s):  
Experimental Methods ◽  
Calcite Precipitation
Sign in / Sign up

Export Citation Format

Share Document