Attentive monitoring and regular repair of concrete cracks are necessary to avoid further durability problems. As an alternative to current maintenance methods, intrinsic repair systems which enable self-healing of cracks have been investigated. Exploiting microbial induced CaCO3 precipitation (MICP) using (protected) axenic cultures is one of the proposed methods. Yet, only a few of the sugges...

The surface relaxivity ρ is an important and fundamental parameter for the interpretation of T2 distributions. To use laboratory data in the field, one must know the various effects that will influence ρ, such as temperature and mineralogy. Recent works suggest that ρ value is fluctuating more than expected and yields errors in water saturation estimation. We studied low field (2.2 MHz proton) ...

The early age microcracking is a significant problem in concrete structures resulting increased permeability and decreased durability. previous work showed that Sporasarcina pasteurii cells immobilized on natural minerals such as bentonite, diatomaceous earth, sepiolite, pumice effectively remediated early-age microcracks the cementitious systems by triggering microbial-induced calcite precipit...

For crushable calcareous sand, the stress-dilatancy curve has a significant turning hook around peak stress ratio, contains main features of loading process, including phase transformation point and ratio point. However, more than half this hook, i.e., line after point, is usually ignored by known models. It difficult to directly establish model with such characteristics, since demonstrates tha...

As an alternative to the usage of axenic bacteria achieve microbially induced calcium carbonate precipitation (MICP), this study evaluates two non-axenic biomasses as self-healing agents. A fungi-based consortium (Yeast) and heterotrophic nitrifiers (HTN) were harvested from incubation agricultural side streams. The characteristics identified through flow cytometry, total suspended solids volat...

Microbially induced calcium carbonate deposition (MICP) restoration technology has good effects and low environmental pollution compared with traditional methods, this been applied in actual projects. However, grouting components such as bacterial solutions are easily lost vertical cracks due to their viscosity well self-weight. In paper, were repaired using microbial mineralization by sealing ...

Antibiotics are increasingly used to treat certain bacteria that harmful humans. However, their inadequate or excessive use can lead the proliferation of more resistant strains, which ultimately reduces effectiveness. To counter this, it is essential limit amount antibiotics ingested, particularly through animal food, if animals themselves have received antibiotic treatment. In case milk, neces...