Cement similar to composition to corals
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Application of Biomimicry in civil sector for making new type of cement for buildings by the way corals build reefs
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of the cement replaced by fly ash. A technique is adopted in the formation of concrete by utilizing microbiologically
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country, but now there is high demand in materials which have gone to a high scenario.
The quantity of fly ash produced from thermal power plants in India is approximately 80 million tons each year, and its
percentage utilization is less than 10%. Majority of fly ash produced is of Class F type. During the last few years, some
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concrete, or may be due to shrinkage and creep. In the present study, crack healing and improvement of physical properties of cement
paste, mortar and concrete are studied. It is done by the addition of bacterial strains namely Bacillus Sphaericus and Sporosarcina
Pastuerii. It is found that these bacteria when added at 106 concentration of cells/ml of water to cement composites increased by about
39.8% and 33.07% in paste. There is an increment of 50% and 28.2% in mortar for two bacterial strains. The strength increment is
found to be 18.3% and 12.2% for Bacillus Sphaericus and Sporosarcina Pastuerii respectively for concrete. Ultrasonic pulse velocity
of the bacterial concrete was in line with conventional concrete. SEM and XRD images revealed presence of CaCO3 produced
microbially. There is overall improvement in the bacterial composites compared to conventional composites.
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Here are the key steps to operate the emergency CO2 absorption unit:
1. Open the tops and bottoms of the required number of CO2 canisters using the special tin cutter. The canisters will sit on rubber seats and be held in position by spring clips.
2. Connect the flexible hose from the unit to the ship's ventilation system.
3. Turn on the electrically driven fan using the fan regulator to adjust the speed so that the vacuum gauge needle points within the green section, indicating the correct air flow rate through the canisters.
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Carbon sequestration involves capturing carbon dioxide emissions from large point sources like power plants and storing it long-term to mitigate climate change. There are three main carbon sequestration methods: terrestrial through plants and soils, geological by injecting CO2 underground, and ocean storage by injecting it deep into the ocean. While carbon sequestration could help reduce emissions, concerns include potential leakage of stored CO2 and impacts on ocean life from ocean storage. More research is still needed but carbon sequestration may prove effective if sites are carefully selected and monitored.
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For making it economical, a part of the cement by weight is replaced with a material called ‘fly ash’ which is cheaper in
cost and abundantly available. On the other hand the cracks in concrete lead to leakage problems and there is a need
to address these problems for future.
In the above context, the objective of the present investigation is to obtain the performance of the concrete by adding
microbiologically induced special growth/filler and part of cement replaced by fly ash. One such thought leads to the
development of very special concrete known as bacterial concrete where bacteria is induced in the concrete and part
of the cement replaced by fly ash. A technique is adopted in the formation of concrete by utilizing microbiologically
induced calcite (CaCo3) precipitation. Microbiologically induced calcite precipitation (MICP) is a technique that comes
under a broader category of science called Bio-Mineralization. ‘Bacillus Subtilis’, a common soil bacterium can induce
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this is a brief and short presentation about self-healing concrete prepared by a college student of civil engineering department.
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This document summarizes a seminar presentation about bioconcrete as a sustainable construction material. Bioconcrete is a type of self-healing concrete that uses bacteria to seal cracks in concrete. It is composed of regular concrete ingredients along with bacterial spores and a nutrient. When cracks form, the spores activate, consume the nutrient, and precipitate minerals to fill the cracks. This extends the lifespan of concrete structures and reduces maintenance costs, providing environmental and economic benefits. The bacteria most suitable for this are spore-forming Bacillus species that can survive in the highly alkaline environment of concrete. Bioconcrete shows promise as a more sustainable alternative to traditional concrete.
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1) Researchers examined samples of Roman concrete that had withstood 2,000 years submerged in seawater to understand its durability.
2) The concrete used volcanic ash and lime, reacting with seawater to form a rare mineral called Al-tobermorite that made the concrete exceptionally strong and stable.
3) The findings could help develop more sustainable modern concrete that uses less fossil fuels and emits less carbon, such as substituting volcanic ash for some Portland cement.
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This document discusses biomimetic architecture, which seeks to apply principles found in nature to architecture and design problems. It provides examples of biomimetic architecture at different levels: organism level looks to individual organisms like termite mounds for passive cooling inspiration; behavior level mimics how organisms interact with environments; and ecosystem level mimics interconnected environmental systems. Major examples given include bullet trains shaped like kingfisher heads, wind turbines modeled after humpback whales, and antimicrobial films inspired by shark skin. Biomimetic architecture is important because it can provide more sustainable solutions by emulating nature's successful models that have evolved over billions of years within Earth's limits.
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1) Mechanically activating wollastonite powder in a ball mill to achieve an amorphous structure favorable for carbonation.
2) Reacting the activated wollastonite with CO2 under controlled conditions.
3) Analyzing the products using XRD and SEM to determine if carbonation occurred and which samples could potentially substitute for cement. Further mechanical testing is needed to verify substitutability. The goal is to decrease CO2 emissions from cement production while creating a more sustainable cement alternative.
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Self-healing concrete uses bacteria added during mixing to autonomously repair cracks. When cracks form and water enters, dormant bacteria are activated, consuming calcium lactate and producing calcium carbonate to fill the cracks. This improves concrete's strength, permeability, and corrosion resistance, reducing maintenance costs. While more expensive initially than traditional concrete, self-healing concrete provides longer-lasting structures and is particularly suitable for applications requiring minimal repair access like offshore platforms.
AN EXPERIMENTAL ON USE OF FLY ASH PELLETS IN CONCRETE IN PLACE OF GRANITE AGG...
A construction industry plays vital role in India which leads into the economic developments. The materials like fine
aggregate, coarse aggregate are used to prepare cement concrete which are easily available natural resources in our
country, but now there is high demand in materials which have gone to a high scenario.
The quantity of fly ash produced from thermal power plants in India is approximately 80 million tons each year, and its
percentage utilization is less than 10%. Majority of fly ash produced is of Class F type. During the last few years, some
cement companies have started using fly ash in manufacturing cement, known as ‘Pozzalanic Portland cement. It mainly
concentrated on replacement of cement with fly ash but production of artificial aggregate with fly ash helps in utilizing
large volume of fly ash in concrete. The world is much interested in this part recently due to this large scale utilization
which also reduces environmental pollution and dwindling of natural resources.
Advance Concrete Technology - Self healing concrete
Self Healing concrete is the future in construction industry. This concrete technique will help improving building/infrastructure life span.
Bacterialconcrete aselfrepairingbiomaterial 150315013521 conversion gate01
This document discusses bacterial concrete, a self-repairing biomaterial. It begins by introducing the concept and challenges with existing concrete repair methods. Bacterial concrete uses bio-mineralization processes where bacteria form inorganic solids either inside or outside the cell. Four types of bacteria - B. Pasturii, B. Subtiles, B. Sphaericus, and B. Cohnii - are classified and their activation mechanisms described. The document then explains how bacterial concrete works to self-repair cracks, highlights advantages like improved strength and durability, and concludes by discussing applications in construction.
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This document discusses the applications of microbial biotechnology in civil and environmental engineering. It begins with an introduction to microbial biotechnology and its importance. It then discusses various applications like using microbes to produce construction materials like biocement and bioconcrete. It also discusses using microbes to improve soil properties in geotechnical engineering and their role in self-healing concrete. Additionally, it addresses microbial impacts on indoor air quality and biodeterioration of buildings. It concludes that microbial biotechnology can help remediate environmental pollution and sees potential for further development and applications in the future.
A study on effect of bacteria on cement composites
This study examined the effect of two bacteria - Bacillus sphaericus and Sporosarcina pasteurii - on cement composites. The bacteria were added to cement paste, mortar, and concrete at a concentration of 106 cells/ml. Compressive strength was found to increase by 39.8% and 33.07% for paste, 50% and 28.2% for mortar, and 18.3% and 12.2% for concrete when using the two bacterial strains respectively. SEM and XRD analysis revealed the presence of calcium carbonate precipitated by the bacterial activity, which improved the strength and durability of the cement composites.
A study on effect of bacteria on cement composites
Abstract
Crack is commonly observed failure in the case of concrete. Crack may develop due to addition of excess of water to during mixing of
concrete, or may be due to shrinkage and creep. In the present study, crack healing and improvement of physical properties of cement
paste, mortar and concrete are studied. It is done by the addition of bacterial strains namely Bacillus Sphaericus and Sporosarcina
Pastuerii. It is found that these bacteria when added at 106 concentration of cells/ml of water to cement composites increased by about
39.8% and 33.07% in paste. There is an increment of 50% and 28.2% in mortar for two bacterial strains. The strength increment is
found to be 18.3% and 12.2% for Bacillus Sphaericus and Sporosarcina Pastuerii respectively for concrete. Ultrasonic pulse velocity
of the bacterial concrete was in line with conventional concrete. SEM and XRD images revealed presence of CaCO3 produced
microbially. There is overall improvement in the bacterial composites compared to conventional composites.
Keywords: Bacillus Sphaericus, Sporosarcina Pastuerii Bacteria, Crack, Concentration, and Calcite.
A study on effect of bacteria on cement composites
This study examined the effect of two bacteria - Bacillus sphaericus and Sporosarcina pasteurii - on cement composites. The bacteria were added to cement paste, mortar, and concrete at a concentration of 106 cells/ml. Compressive strength was found to increase by 39.8% and 33.07% for paste, 50% and 28.2% for mortar, and 18.3% and 12.2% for concrete when using the two bacterial strains respectively. SEM and XRD analysis revealed the presence of calcium carbonate precipitated by the bacterial activity, which improved the strength and durability of the cement composites.
DESSERTATION PRESENTATION.pptx
Here are the key steps to operate the emergency CO2 absorption unit:
1. Open the tops and bottoms of the required number of CO2 canisters using the special tin cutter. The canisters will sit on rubber seats and be held in position by spring clips.
2. Connect the flexible hose from the unit to the ship's ventilation system.
3. Turn on the electrically driven fan using the fan regulator to adjust the speed so that the vacuum gauge needle points within the green section, indicating the correct air flow rate through the canisters.
4. The rotating head will ensure each canister is used in rotation to absorb CO2 from the ship's air supply.
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efficient control of multilevel inverters, enabling their widespread adoption and
integration into modern power electronic systems. Through the amalgamation of
sinusoidal pulse width modulation (SPWM) with a high-frequency square wave
pulse, this controlling technique attains energy equilibrium across the coupling
capacitor. The modulation scheme incorporates a simplified switching pattern
and a decreased count of voltage references, thereby simplifying the control
algorithm.
学校原版美国波士顿大学毕业证学历学位证书原版一模一样
原版一模一样【微信：741003700 】【美国波士顿大学毕业证学历学位证书】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
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原版制作(Humboldt毕业证书)柏林大学毕业证学位证一模一样
原件一模一样【微信：bwp0011】《(Humboldt毕业证书)柏林大学毕业证学位证》【微信：bwp0011】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问微bwp0011
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Comparative analysis between traditional aquaponics and reconstructed aquapon...
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
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Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
22CYT12-Unit-V-E Waste and its Management.ppt
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Null Bangalore | Pentesters Approach to AWS IAM
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
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Cement similar to composition to corals
- 1. CEMENT SIMILAR TO COMPOSITION TO CORALS Chetan Karwa
- 2. WHAT IS BIOMIMICRY? • Biomimicry is the term used to describe the substances, equipment, mechanism and systems by which humans imitate natural systems and designs. The word biomimicry Originates from the Greek words:- Bios = Life Mimesis = Imitate
- 3. OUR APPROACH TO BIOMIMICRY • Cement having composition of Corals - Bio mineral mineralization expert Brent Constantz of Stanford university was inspired to make a new type of cement for buildings by the way corals build reefs. • Concrete represents incredible reservoir.
- 4. WHAT'S NEWABOUT THIS PROCESS? • Calcium carbonate precipitation • The concrete allows us to build massive structures just like the Great Barrier Reef. • The barrier reef represents billions of tons of carbon dioxide that’s been taken from the ocean.
- 5. CONCLUSION • Tests give evidence that coral like forms can be used effectively in construction • Coral like cement is used all over the world to give an aesthetic look to exposed parts of a structure.
- 6. References • Engineering News Record 1926. 97(3) 106. - (Difficulties of construction work on the island of Guam), • An illustrated article by a former U.S. Naval officer which mentions the use of coral sand and crushed metamorphosed coral used as concrete aggregate. Photographs show building and canal batiks in which these materials were used. • Engineering News Record 1945. 135. No;6, pp.174-180 ' (Coral - a good aggregate in concrete). • Engineering News Record July 13th, 1944» vol,29 ("Characteristics of coral deposits" by Harold T. Stearns). • U.S. geological survey describing different types of coral and describing its use in constructing Pacific advance bases during- the war. https://www.slideshare.net/mobile/gauravhtandon1/biomimicry-applications-in-civil- engineeringhttps://earthsky.org/human-world/brent-constantz-builds-cement-like-coral- dohttps://core.ac.uk/download/pdf/54845955.pdf&ved=2ahUKEwiD- unPmunvAhVUT30KHTVQCaIQFjAKegQIIRAC&usg=AOvVaw1YQskckUgZbqLAAD9l637B
- 7. THANK YOU