Experimental Investigation on Bacterial Concrete Using Bacillus Subtitles

2019 ◽  
pp. 207-219
Author(s):  
Saradha P ◽  
Vidhya K ◽  
Visali S
Keyword(s):  
Experimental Investigation ◽  
Compressive Strength ◽  
Main Part ◽  
Self Healing ◽  
Healing Property ◽  
Maximum Compressive Strength ◽  
Special Growth ◽  
The Right ◽  
Bacterial Concrete

This Project deals with the present investigation is to obtain the performance of the concrete by the microbiologically induced special growth. One such has led to the development of a very special concrete known as bacterial concrete or otherwise called as self-healing concrete where the bacteria is induced in the mortars and concrete to heal up the faults. Researchers with different bacteria proposed different concrete. Here an attempt was made by using the bacteria “Bacillus Subtitles”. The Study showed a significant increase in the compressive strength due to the addition of bacteria. When 30ml of Bacillus subtitles is added in M20 grade concrete is attains maximum compressive strength. In Concrete self-healing property is successfully achieved due to addition of bacteria. Bacillus subtitles is used to induce Caco 3 precipitation. The main part of work will focus on how the right conditions can be created for the bacteria not only to concrete but to produce as much calcite as needed to repair cracks.

scholarly journals Compressive strength of bacterial concrete by varying concentrations of E.Coli and JC3 bacteria for Self-Healing Concrete

2019 ◽  
Vol 9 (1) ◽  
pp. 3659-3661
Keyword(s):  
Compressive Strength ◽  
Bacillus Subtilis ◽  
Cell Concentration ◽  
Self Healing ◽  
E Coli ◽  
Strength And Durability ◽  
Bacterial Concrete

This paper focuses on how the bacterium produces calcite to repair cracks and thereby increases the strength and durability of the concrete. The bacterial concrete can be made by embedding bacteria in the concrete to make it constantly precipitate calcite. Bacillus E Coli and Bacillus Subtilis JC3 are used for this purpose. Bacillus E coli and Bacillus Subtilis JC3 induced at cell concentration 10^5 cells/ml improves properties of concrete. This paper campaigns for the induction of bacteria in concrete for the promotion of self-healing cracks.

Mechanical and Microstructure Study of the Self Healing Bacterial Concrete

2019 ◽  
Vol 969 ◽  
pp. 472-477
Author(s):  
Sachin Tiwari ◽  
Shilpa Pal ◽  
Rekha Puria ◽  
Vikrant Nain ◽  
Rajendra Prasad Pathak
Keyword(s):  
Compressive Strength ◽  
Bacillus Megaterium ◽  
Construction Material ◽  
Research Work ◽  
Bacillus Sphaericus ◽  
Maximum Amount ◽  
The Self ◽  
Self Healing ◽  
Scanning Electron ◽  
Bacterial Concrete

Concrete largely used for construction material, degrades with the development of cracks that becomes easy passage for entry of chemicals and harmful compounds. Self healing capability is helpful to mitigate the deterioration of the concrete structures. This research work focuses on the self healing behaviour and mechanical properties of the bioconcrete supplemented with three different bacteria namely Bacillus sphaericus, Bacillus cohnii and Bacillus megaterium. Concrete supplemented with Bacillus cohnii exhibited 35.31% increase in compressive strength compared to control mix after 28 days. Concrete supplemented with other bacteria Bacillus sphaericus and Bacillus megaterium also showed enhanced compressive strength. Interestingly, addition of bacteria aided in healing of artificially generated cracks by formation of CaCO3 minerals. Maximum amount of healing (bacterial precipitation) which could be quantified as calcite minerals present in the bacterial concrete was 11.44% with B. cohnii confirmed by the Scanning Electron Microscope (SEM) with Energy Dispersive Spectroscopy (EDS).

scholarly journals Analysis Of The Effect Of Bending Strength On Scaffolding System With Direct Analysis Method

2021 ◽  
Vol 12 (2) ◽  
pp. 65-68
Author(s):  
Michael Talim
Keyword(s):  
Compressive Strength ◽  
Bending Strength ◽  
Steel Structures ◽  
Direct Analysis ◽  
Iteration Step ◽  
Analysis Method ◽  
Inelastic Analysis ◽  
Non Linear ◽  
Maximum Compressive Strength ◽  
The Right

Steel scaffolding is a very important component in formwork work to support further work. The purpose of this analysis is to review the maximum compressive strength that occurs in 3-story scaffolding before buckling occurs using the direct analysis method (DAM). The design of steel structures, which are generally slender, requires stability analysis. The result is influenced by imperfections (non-linear geometry) and inelastic conditions (non-linear material). In this final project, we use second-order inelastic analysis based on direct analysis method. The 3-level scaffolding model was analyzed using beam elements in the SAP2000 program with 6 variations of notional loads applied to the weak axis direction of the scaffolding pipe.The lowest compressive strength on 3-story scaffolding before buckling occurs is 18.24 kN with horizontal notional loads to the right on the first level scaffolding, left on the second level scaffolding and to the right on the 3rd level scaffolding. The results of the analysis show that the maximum compressive strength obtained results in a large displacement drastically in the iteration step. By using the analysis on the DAM method, the results obtained are more effective.

scholarly journals Bacterial Concrete as a Sustainable Building Material?

2020 ◽  
Vol 12 (2) ◽  
pp. 696 ◽  
Author(s):  
Elżbieta Stanaszek-Tomal
Keyword(s):  
Building Materials ◽  
Construction Materials ◽  
High Energy ◽  
Production Costs ◽  
Sustainable Construction ◽  
Industrial Scale ◽  
Self Healing ◽  
Effective Response ◽  
The Right ◽  
Bacterial Concrete

The right selection of building materials plays an important role when designing a building to fall within the definition of sustainable development. One of the most commonly used construction materials is concrete. Its production causes a high energy burden on the environment. Concrete is susceptible to external factors. As a result, cracks occur in the material. Achieving its durability along with the assumptions of sustainable construction means there is a need to use an environmentally friendly and effective technique of alternative crack removal in the damaged material. Bacterial self-healing concrete reduces costs in terms of detection of damage and maintenance of concrete structures, thus ensuring a safe lifetime of the structure. Bacterial concrete can improve its durability. However, it is not currently used on an industrial scale. The high cost of the substrates used means that they are not used on an industrial scale. Many research units try to reduce production costs through various methods; however, bacterial concrete can be an effective response to sustainability.

scholarly journals Characterization of Steel Slag Filler and Its Effect on Aging Resistance of Asphalt Mastic with Various Aging Methods

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 869
Author(s):  
Minghua Wei ◽  
Shaopeng Wu ◽  
Haiqin Xu ◽  
Hechuan Li ◽  
Chao Yang
Keyword(s):  
Particle Size ◽  
Surface Characterization ◽  
Steel Slag ◽  
Self Healing ◽  
Limestone Filler ◽  
Asphalt Mastic ◽  
Pore Characterization ◽  
Asphalt Mastics ◽  
Healing Property

Steel slag is the by-product of the steelmaking industry, the negative influences of which prompt more investigation into the recycling methods of steel slag. The purpose of this study is to characterize steel slag filler and study its feasibility of replacing limestone filler in asphalt concrete by evaluating the resistance of asphalt mastic under various aging methods. Firstly, steel slag filler, limestone filler, virgin asphalt, steel slag filler asphalt mastic and limestone filler asphalt mastic were prepared. Subsequently, particle size distribution, surface characterization and pore characterization of the fillers were evaluated. Finally, rheological property, self-healing property and chemical functional groups of the asphalt mastics with various aging methods were tested via dynamic shear rheometer and Fourier transform infrared spectrometer. The results show that there are similar particle size distributions, however, different surface characterization and pore characterization in the fillers. The analysis to asphalt mastics demonstrates how the addition of steel slag filler contributes to the resistance of asphalt mastic under the environment of acid and alkaline but is harmful under UV radiation especially. In addition, the pore structure in steel slag filler should be a potential explanation for the changing resistance of the asphalt mastics. In conclusion, steel slag filler is suggested to replace limestone filler under the environment of acid and alkaline, and environmental factor should be taken into consideration when steel slag filler is applied to replace natural fillers in asphalt mastic.

Iron (III) cross-linked thermoplastic nitrile butadiene elastomer with temperature-adaptable self-healing property

2021 ◽  
Vol 28 (3) ◽  
Author(s):  
Chenghao Dai ◽  
Xijuan Cao ◽  
Kai Gou ◽  
Qiyan Yin ◽  
Binjie Du ◽  
...  
Keyword(s):  
Self Healing ◽  
Healing Property

Robust Anti-Infective Multilayer Coatings with Rapid Self-Healing Property

2021 ◽  
pp. 111828
Author(s):  
Chao Zhou ◽  
Juntao Zhou ◽  
Xiaoqing Ma ◽  
Dicky Pranantyo ◽  
Jingjing Li ◽  
...  
Keyword(s):  
Multilayer Coatings ◽  
Self Healing ◽  
Healing Property
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