Microbially induced calcium carbonate (CaCO3) precipitation (MICP) has been extensively studied for soil improvement in geotechnical engineering. The quantity and size of crystals affect the strength MICP-treated soil. In this study, microfluidic chip experiments column were conducted to optimize MICP treatment protocols effective enhancement sandy soils. microscale reveal that, due Ostwald rip...

Microbially-induced CaCO3 precipitation (MICP) is a naturally occurring process wherein durable carbonates are formed as a result of microbial metabolic activities. In recent years, MICP technology has been widely harnessed for applications in civil engineering wherein synthesis of calcium carbonate crystals occurs at ambient temperature paving way for low energy biocement. MICP using pure urea...

We consider the switched-affine optimal control problem, i.e., the problem of selecting a sequence of affine dynamics from a finite set in order to minimize a sum of convex functions of the system state. We develop a new reduction of this problem to a mixed-integer convex program (MICP), based on perspective functions. Relaxing the integer constraints of this MICP results in a convex optimizati...

Abstract Peat is known as problematic ground with low bearing capacity and extensively high compressibility. Bio-cementation or commonly microbial-induced calcite precipitation (MICP) has been recently introduced a improvement alternative for peat under waterlogged condition. Using isolated bacteria strains P19 P21 from tropical peat, it found that unconfined compression strength (UCS) increase...

Microbially-induced calcium carbonate precipitation (MICP) is a promising grouting material for subsurface remediation due to its water-like viscosity and excellent penetration. Current studies of MICP-grouting both rock fractures highly-permeable matrix focus on the spatio-temporal distribution precipitated bio-CaCO3 resulting reduction in permeability. Conversely, we improvement mechanical re...

With the recent advances in biogeotechnics field and specifically microbially induced calcite precipitation (MICP), cone penetration testing (CPT) has become a valuable tool to overcome challenges associated with intact sampling of improved soils, evaluate spatial extent magnitude applied MICP treatment, assess consequential improvement engineering properties. Although CPT tip resistance (qc) c...

Microbial induced carbonate precipitation (MICP) is a new geotechnical engineering technology used to strengthen soils and other materials. Although it considered be environmentally friendly, there lack of quantitative data objective evaluation support conclusions about its environmental impact. In this paper, the energy consumption carbon emissions MICP are quantitatively analyzed by using lif...

Abstract MICP technology is a new proposed for soil reinforcement research in recent years, which has the advantages of environmental protection and sustainability. Through review analysis domestic foreign literature, mechanism microbial mineralization reaction progress scholars were comprehensively summarized. This paper introduces basic principle urea hydrolysis technology, expounds control f...

Microbially induced calcium carbonate precipitation (MICP) uses the metabolic function of microbes to carry out biochemical reactions with other substances in environment. Through controlled growth inorganic minerals, soil particles are cemented and pores filled solidify reduce its permeability. Thus, application this technology was foreseen geotechnical engineering environment (building antise...