A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SEM investigation of microbiologically remediated plastic shrinkage cracks in concrete
This paper presents the results of a study on the effects of microbiologically induced mineral precipitation in reducing the plastic shrinkage cracks in concrete slabs by external remediation. External bio-remediation was done by soaking the slabs (made with and without bacteria) with plastic shrinkage cracks in a remediation tank filled with bacteria (B. pasteurii) suspended in medium (Urea-CaCl2 solution). The crack areas before and after remediation were compared to determine the extent of crack area reduction and are presented in this paper. The plastic shrinkage crack area reduction capacities of concrete slabs (made with and without bacteria) by external bio and chemical (only medium) remediation are presented in this paper. The effect of dead bacteria and different concentrations of live bacteria on the plastic shrinkage crack area reduction capacity were also determined. Microbiologically induced external remediation was found to be very effective in remediating plastic shrinkage cracks. External bio- remediations of the cracked slabs were found to be effective than external chemical remediation. X-ray diffraction technique was used to characterize the chemical composition of the crystals that grew on the surface of the concrete slabs. Scanning Electron Microscope (SEM) was used to conduct an elemental and compound analysis on the concrete samples to document the role of microbiologically induced calcite precipitation in plugging the plastic shrinkage cracks.
SEM investigation of microbiologically remediated plastic shrinkage cracks in concrete
This paper presents the results of a study on the effects of microbiologically induced mineral precipitation in reducing the plastic shrinkage cracks in concrete slabs by external remediation. External bio-remediation was done by soaking the slabs (made with and without bacteria) with plastic shrinkage cracks in a remediation tank filled with bacteria (B. pasteurii) suspended in medium (Urea-CaCl2 solution). The crack areas before and after remediation were compared to determine the extent of crack area reduction and are presented in this paper. The plastic shrinkage crack area reduction capacities of concrete slabs (made with and without bacteria) by external bio and chemical (only medium) remediation are presented in this paper. The effect of dead bacteria and different concentrations of live bacteria on the plastic shrinkage crack area reduction capacity were also determined. Microbiologically induced external remediation was found to be very effective in remediating plastic shrinkage cracks. External bio- remediations of the cracked slabs were found to be effective than external chemical remediation. X-ray diffraction technique was used to characterize the chemical composition of the crystals that grew on the surface of the concrete slabs. Scanning Electron Microscope (SEM) was used to conduct an elemental and compound analysis on the concrete samples to document the role of microbiologically induced calcite precipitation in plugging the plastic shrinkage cracks.
SEM investigation of microbiologically remediated plastic shrinkage cracks in concrete
Vemuri, Swarna Latha (author) / Panchalan, Ramesh K. (author) / Rapolu, Rajashekhar (author) / Ramakrishnan, V. (author) / Bang, Sookie (author)
2004
12 Seiten, 7 Bilder, 2 Tabellen, 5 Quellen
Conference paper
Storage medium
English
EXPERIMENTAL METHODOLOGY TO STUDY PLASTIC SHRINKAGE CRACKS IN HIGH STRENGTH CONCRETE
| Springer Verlag | 2006
Experimental Methodology to Study Plastic Shrinkage Cracks in High Strength Concrete
| British Library Conference Proceedings | 2006
Shrinkage cracks in reinforced concrete tanks
| Engineering Index Backfile | 1935
Influence of Shrinkage-Reducing Admixtures on Development of Plastic Shrinkage Cracks
| British Library Online Contents | 2007