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Article
Seawater-based soybean urease for calcareous sand biomineralization
In tropical islands, calcareous sand with poor engineering properties usually needs to be treated before it can be used as building materials. Considering the scarcity of freshwater in these areas, this study ...
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Article
Optimization of one-phase-low-pH enzyme-induced carbonate precipitation method for soil improvement
There are two major challenges for the use of enzyme-induced carbonate precipitation (EICP)-based soil improvement method: cost and treatment effect. Optimizing the parameters of the treatment solution is one ...
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Article
Effect of pH on soil improvement using one-phase-low-pH MICP or EICP biocementation method
One-phase-low-pH MICP (Microbially Induced Carbonate Precipitation) or EICP (Enzyme Induced Carbonate Precipitation) is a new biocementation method for soil improvement. This method uses the low pH of bacteria...
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Article
Modified one-phase-low-pH method for bacteria or enzyme-induced carbonate precipitation for soil improvement
One of the latest developments in biocementation is the use of one-phase-low-pH MICP or EICP method as a more effective and efficient alternative to the traditional two-phase method for the treatment of sandy ...
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Article
Effect of waste rubber particles on the shear behaviour of bio-cemented calcareous sand
Calcareous sand, a special type of sand commonly used for the construction of coastal engineering in tropical coasts, is usually required to be strengthened due to its poor engineering mechanical properties. M...
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Article
Bio-mediated calcium carbonate precipitation and its effect on the shear behaviour of calcareous sand
Calcareous sands have abundant intraparticle pores and are prone to particle breakage. This often leads to poor engineering properties, which poses a challenge to coastal infrastructure construction. A study u...
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Article
Retarding effect of concentration of cementation solution on biocementation of soil
Concentration of cementation solution (CCS) is one of the key factors influencing the cementation effect on soil improvement through the microbially induced carbonate precipitation (MICP) process. To precipitate ...
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Article
One-phase-low-pH enzyme induced carbonate precipitation (EICP) method for soil improvement
Enzyme induced carbonate precipitation (EICP) is an emerging soil improvement method using free urease enzyme for urea hydrolysis. This method has advantages over the commonly used microbially induced carbonat...
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Article
Soil bio-cementation using an improved 2-step injection method
To improve the uniformity of calcium carbonate distribution in soil treated by microbially induced carbonate precipitation (MICP), an improved biological injection method, namely “2-step method”, was proposed....
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Article
“Soil arching” for piled embankments: insights from stress redistribution behaviour of DEM modelling
For piled embankments, it is widely recognised that the majority of embankment load can be transferred to the piles through the “soil arching” mobilised in the embankment. To date, no consensus has been reache...
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Article
Influence of cementation level on the strength behaviour of bio-cemented sand
Microbially induced calcite precipitation (MICP) is used increasingly to improve the engineering properties of granular soils that are unsuitable for construction. This shows MICP technique significant advanta...
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Article
Visualization of the formation and features of soil arching within a piled embankment by discrete element method simulation
Piled embankments are widely used in highway and railway engineering due to their economy and efficiency in overcoming several issues encountered in constructing embankments over weak soils. Soil arching, caus...
