Bio concrete is a type of self-healing concrete that uses bacteria and their byproducts to seal cracks in concrete over time. It contains bacteria in dormant spores and chemical precursors that activate the bacteria. When water enters cracks, it activates the precursors and bacteria, which metabolize to form minerals like calcium carbonate that fill the cracks. This process allows the concrete to self-heal repeated cracking and potentially last much longer than traditional concrete.
concrete is widely used around the world. the consumption rate of cement of a country gives the development rate of the country. hence concrete is used in most of the construction works. concrete tends to crack when there is air voids etc. this ill further corrode the reinforcement and cause in destruction of the structure. bio concrete is a type of concrete hat will help in closing those cracks by itself.
Self-healing concrete is the special type of concrete invented by a group of microbiology researchers under the head of henk jonkers. Bio concrete is also called as BACTERIAL CONCRETE or self-healing concrete. Its specially made to increase the lifespan or the durability of concrete structure by the self-healing action of that concrete
concrete is widely used around the world. the consumption rate of cement of a country gives the development rate of the country. hence concrete is used in most of the construction works. concrete tends to crack when there is air voids etc. this ill further corrode the reinforcement and cause in destruction of the structure. bio concrete is a type of concrete hat will help in closing those cracks by itself.
Self-healing concrete is the special type of concrete invented by a group of microbiology researchers under the head of henk jonkers. Bio concrete is also called as BACTERIAL CONCRETE or self-healing concrete. Its specially made to increase the lifespan or the durability of concrete structure by the self-healing action of that concrete
self healing concrete also know as bio concrete which includes the repairing of concrete by bacteria .
the video in the slide number 7
link : https://www.youtube.com/watch?v=laqACVY1U_k
Cracks in concrete are inevitable and are one of the inherent weaknesses of concrete. Water and other salts seep through these cracks, corrosion initiates, and thus reduces the life of concrete. So there was a need to develop an inherent biomaterial, a self - repairing material which can remediate the cracks and fissures in concrete. Bacterial concrete is a material, which can successfully remediate cracks in concrete. This technique is highly desirable because the mineral precipitation induced as a result of microbial activities is pollution free and natural. As the cell wall of bacteria is anionic, metal accumulation (calcite) on the surface of the wall is substantial, thus the entire cell becomes crystalline and they eventually plug the pores and cracks in concrete. This paper discusses the plugging of artificially cracked cement mortar using Bacillus Pasteurii bacteria combined with sand as a filling material in artificially made cuts in cement mortar which was cured in urea and Calcium chloride medium. The effect on the compressive strength and stiffness of the cement mortar cubes due to the mixing of bacteria is also discussed in this paper. It was found that use of bacteria improves the stiffness and compressive strength of concrete. Scanning electron microscope (SEM) is used to document the role of bacteria in microbiologically induced mineral precipitation. Rod like impressions were found on the face of calcite crystals indicating the presence of bacteria in those places.
In this study, bacterial concrete is to be prepared under grade of concrete OPC 43.The design mix proportioning also carried under IS code provision. Testing of specimens are carried at 7 days ,14 days and 28 days of curing by Compression Testing Machine and Universal Testing Machine for corresponding specimens. The Compressive Strength and Flexural Strength of Bacterial Concrete are found.
Self healing concrete are those concrete which heals the crack itself .How the technology is changing the concrete Industry and how can we get the benefit is described here.
Formation of cracks in concrete is a common phenomenon that allows many chemicals, water to seep inside leading to decrease in durability, including progressive drop in concrete strength. The maintenance and repair of structural concrete is very complex phenomenon. Self-healing concrete, using bacteria at the time of mixing, is an impressive solution to overcome these kinds of adverse effects. It is an economical way is to prepare concrete of better quality. The study was carried out to investigate the concrete performance by adding bacteria “Bacillus subtilis”. This Self-Healing concrete is also known as as Bio-concrete. Bacteria was induced directly in the concrete mix along with calcium lactate i.e., an organic precursor producing calcium carbonate crystals that block cracks and pores in the concrete. Samples were made with different quantities of bacteria and results showed significant increase in compressive strength of concrete and decrease in permeability. The concrete micro-structure was observed under SEM which also confirmed the experimental results obtained.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
self healing concrete also know as bio concrete which includes the repairing of concrete by bacteria .
the video in the slide number 7
link : https://www.youtube.com/watch?v=laqACVY1U_k
Cracks in concrete are inevitable and are one of the inherent weaknesses of concrete. Water and other salts seep through these cracks, corrosion initiates, and thus reduces the life of concrete. So there was a need to develop an inherent biomaterial, a self - repairing material which can remediate the cracks and fissures in concrete. Bacterial concrete is a material, which can successfully remediate cracks in concrete. This technique is highly desirable because the mineral precipitation induced as a result of microbial activities is pollution free and natural. As the cell wall of bacteria is anionic, metal accumulation (calcite) on the surface of the wall is substantial, thus the entire cell becomes crystalline and they eventually plug the pores and cracks in concrete. This paper discusses the plugging of artificially cracked cement mortar using Bacillus Pasteurii bacteria combined with sand as a filling material in artificially made cuts in cement mortar which was cured in urea and Calcium chloride medium. The effect on the compressive strength and stiffness of the cement mortar cubes due to the mixing of bacteria is also discussed in this paper. It was found that use of bacteria improves the stiffness and compressive strength of concrete. Scanning electron microscope (SEM) is used to document the role of bacteria in microbiologically induced mineral precipitation. Rod like impressions were found on the face of calcite crystals indicating the presence of bacteria in those places.
In this study, bacterial concrete is to be prepared under grade of concrete OPC 43.The design mix proportioning also carried under IS code provision. Testing of specimens are carried at 7 days ,14 days and 28 days of curing by Compression Testing Machine and Universal Testing Machine for corresponding specimens. The Compressive Strength and Flexural Strength of Bacterial Concrete are found.
Self healing concrete are those concrete which heals the crack itself .How the technology is changing the concrete Industry and how can we get the benefit is described here.
Formation of cracks in concrete is a common phenomenon that allows many chemicals, water to seep inside leading to decrease in durability, including progressive drop in concrete strength. The maintenance and repair of structural concrete is very complex phenomenon. Self-healing concrete, using bacteria at the time of mixing, is an impressive solution to overcome these kinds of adverse effects. It is an economical way is to prepare concrete of better quality. The study was carried out to investigate the concrete performance by adding bacteria “Bacillus subtilis”. This Self-Healing concrete is also known as as Bio-concrete. Bacteria was induced directly in the concrete mix along with calcium lactate i.e., an organic precursor producing calcium carbonate crystals that block cracks and pores in the concrete. Samples were made with different quantities of bacteria and results showed significant increase in compressive strength of concrete and decrease in permeability. The concrete micro-structure was observed under SEM which also confirmed the experimental results obtained.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
2. CONTENTS
2
• Introduction
• Bio Concrete
• Constituents Of Bio Concrete
• Mechanism
• Application Of Healing Agent
• Evaluation
• Conclusion
• References
3. INTRODUCTION
3
• Cracking in concrete is a main concern throughout the
because it cause loss of strength of structure with Time.
• A environmental friendly solution is preferred i.e. biological
concrete over other alternatives like epoxy resins which is non
degradable.
• The bacteria based concrete is believed to remain hibernated
within the concrete for up to 200 years. When cracks appear
in a concrete structure and water starts to seep in through, the
spores of the bacteria starts microbial activities on contact
with the water and oxygen.
4. BIO CONCRETE
4
• Its specially made to increase the lifespan or the
durability of concrete structure by the self healing
action of that concrete.
• Bio concrete is also called as BACTERIAL
CONCRETE or SELF HEALING CONCRETE.
• Its is a special type of concrete invented by a group of
microbiology researchers under the head of Henk
Jonkers.
5. Constituents Of Bio Concrete
Mainly there are two components present in bio concrete :
• The special bacteria that has to resist the alkalinity and the
mechanical stress of concrete.
• The chemical precursor to activate the bacteria.
5
7. MECHANISM
• The cracks are formed on the surface of concrete due to
many reasons like shrinkage, Inadequate water for
hydration.
• But if cracks are more than .2mm then concrete itself fail
to heal itself thus opening passage to chemicals and other
corroding materials.
• In bio-concrete if water is in contact with the concrete
though the cracks the bacteria get activated from its stage
of dormancy and through its metabolic activities forms
calcite which further acts as a healing material .7
8. Continued..
8
• The water is deliberately forced into the crack
and the precursor is activated.
• The activated precursor intern induces the
bacteria to react with that precursor and form a
base of calcium carbonate called as limestone.
• When the cracks are filled completely by the
bacteria it again goes to the stage of dormancy.
• Again if in future if cracks get widen and the
foreign particles tends to enter the cracks the
bacteria get activated and thus heal the cracks.
Thus acting as a long lasting healing agent.
9. What is happening inside bio concrete
(mechanism)
9
• The cracks are formed on the surface of concrete
due to many reasons like shrinkage, Inadequate
water for hydration …etc.
• The water is deliberately forced into the crack
and the precursor is activated
10. Continued…
• The activated precursor intern induces the
bacteria to react with that precursor and form a
base of calcium carbonate called as limestone
10
13. Application Of Healing Agents
13
BY DIRECT APPLICATION
• The bacteria and the chemical precursor(calcium lactate) are added
directly while making the concrete.
ENCAPSULATION (Light Weight Aggregate)
• The part of the coarse aggregate is replaced by the light weight
aggregate (LWA) , which is saturated with twice the calcium lactate
solution and spores of the bacteria.
• After saturation of the clay particles with 6% healing agents and
then concrete is made.
14. Healing Agents
14
The bacteria which are used as the healing
agents are :
• Acidithio bacillus sp.
• Mycobacterium sp.
• Proteobacteria
• Acidobacteria
• Actinobacteria
19. APPLICATION
19
• From enhancement in durability of cementitius materials to
improvement in sand properties, from repair of limestone
monuments, sealing of concrete cracks to highly durable
bricks, microbial concrete has been successful in one and all.
• This new technology can provide ways for low cost and
durable roads.
• High strength buildings with more bearing capacity.
• Long lasting river bank.
• Low cost durable housing.
20. CONCLUSION
• Microbial concrete technology has proved to be better than
many conventional technologies because of its eco- friendly
nature, self-healing abilities and increase in durability of
various building materials.
• Enhancement of compressive strength, reduction in
permeability, water absorption, reinforced corrosion have
been seen in various cementitious and stone materials.
• Cementation by this method is very easy and convenient for
usage. This will soon provide the basis for high quality
structures that will be cost effective and environmentally
safe but, more work is required to improve the feasibility of
this technology from both an economical and practical
viewpoints.
20
21. REFERENCES
• International Journal of Materials Chemistry and Physics
Vol. 1, No. 1, 2015, pp. 11-19.
•Samudre MP, Mangulkar MN, Saptarshi SD, A review of
emerging way to enhance the durability and strength of
concrete structures: Microbial concrete, Intern J Innov Res Sci
Eng Tech. 3 (2014) 9311-9316.
• Google, google images, engineering trends.
• Ivanchev I, Research on cracks in reinforced concrete
elements by taking into account the experimentally
determined concrete and reinforcing steel mechanical
properties, Ind JApp Res 5 (2015) 239-241.
21