This document discusses concrete distress, its causes, and concrete repair systems. It defines distress as damage to concrete that can occur during production or service life due to varying conditions. Common causes of distress include structural loads, errors in design and construction, drying shrinkage, corrosion, and deterioration over time from chemical reactions, freezing/thawing, or weathering. Proper concrete repair requires determining the cause of damage, evaluating its extent, selecting repair methods, preparing the surface, applying repair materials, and curing. Durable repairs depend on high quality workmanship and materials to ensure the repair is well-bonded and resistant to future distress.
Quality Control in Concrete and Durability factors : An overviewbybyRAJESH PRASAD,IRSE, CPM/M, RVNL. KOLKATA. An interesting and informative presentation....
Introduction about Repair & Rehabilitation of Structures
Repair of Structures
Rehabilitation of Structures
Maintenance of Structures
Various Methods of Maintenance
Quality Control in Concrete and Durability factors : An overviewbybyRAJESH PRASAD,IRSE, CPM/M, RVNL. KOLKATA. An interesting and informative presentation....
Introduction about Repair & Rehabilitation of Structures
Repair of Structures
Rehabilitation of Structures
Maintenance of Structures
Various Methods of Maintenance
Hi viewers, I am back with the various concepts of TYPES OF TESTS ON CONCRETE for civil engineers.
Here, i explained few topics
What is a concrete? Classification based o state of concrete? and various tests?
what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.
The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
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Reinforced earth is a combination of earth and linear reinforcing strips that are capable of bearing large tensile stresses.
The reinforcement provided by these strips enable the mass to resist the tension in a way which the earth alone could not. The source of this resistance to tension is the internal friction of soil, because the stresses that are created within the mass are transferred from soil to the reinforcement strips by friction.
This power point presentation gives you information about the various chemicals, admixtures used to repair members and improve the properties of concrete. it gives you information about the various types of concrete. it gives you information about the various methods of repair.
This presentation has been prepared by civil engineering students of Tolani Foundation Gandhidham Polytechnic:
DHAWANI LAVISH
GAYAKWAD TEJAS
GORASIYA MAYUR
HIRANI YATIN
KATARMAL DARSHAN
LALWANI PIYUSH
MALI VISHNU
PATEL PARTH
PRAJAPATI JAYESH
PRAJAPATI KALPESH
Thank You!!
Design of rigid pavements. IRC method of design of rigid pavement. Transportation Engineering. Civil Engineering. Wheel loads on rigid pavement. Action of various stresses on rigid pavement. Highway engineering. How rigid pavements different from flexible pavements
non destructive concrete testing equipment
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Hi viewers, I am back with the various concepts of TYPES OF TESTS ON CONCRETE for civil engineers.
Here, i explained few topics
What is a concrete? Classification based o state of concrete? and various tests?
what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.
The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
vacuum dewatering system
vacuum dewatering pump
vacuum dewatering box
wellpoint pump systems
dewatering pump system
dewatering pump
dewatering wellpoint
small wellpoint dewatering systems
interesting civil engineering topics
civil engineering topics for presentation
civil seminar topics ppt
civil engineering seminar topics 2018
best seminar topics for civil engineering
seminar topics pdf
seminar topics for mechanical engineers
seminar topic for civil engineering pdf
Reinforced earth is a combination of earth and linear reinforcing strips that are capable of bearing large tensile stresses.
The reinforcement provided by these strips enable the mass to resist the tension in a way which the earth alone could not. The source of this resistance to tension is the internal friction of soil, because the stresses that are created within the mass are transferred from soil to the reinforcement strips by friction.
This power point presentation gives you information about the various chemicals, admixtures used to repair members and improve the properties of concrete. it gives you information about the various types of concrete. it gives you information about the various methods of repair.
This presentation has been prepared by civil engineering students of Tolani Foundation Gandhidham Polytechnic:
DHAWANI LAVISH
GAYAKWAD TEJAS
GORASIYA MAYUR
HIRANI YATIN
KATARMAL DARSHAN
LALWANI PIYUSH
MALI VISHNU
PATEL PARTH
PRAJAPATI JAYESH
PRAJAPATI KALPESH
Thank You!!
Design of rigid pavements. IRC method of design of rigid pavement. Transportation Engineering. Civil Engineering. Wheel loads on rigid pavement. Action of various stresses on rigid pavement. Highway engineering. How rigid pavements different from flexible pavements
non destructive concrete testing equipment
non destructive concrete testing methods
non destructive test Penetration method
Rebound hammer method
Pull out test method
Ultrasonic pulse velocity method
Radioactive methods
methods of testing concrete
concrete strength testing methods
types of non destructive testing
non destructive concrete testing equipment
concrete tests pdf
destructive and non destructive testing
concrete testing procedures
non destructive test for concrete
destructive and non destructive testing
non destructive testing pdf
types of non destructive testing
non destructive testing methods
non destructive testing methods ppt
Bps 5205 sustainability construction and maintainability velpandi & mariaMaria Archana
Singapore heavily relies on conventional precast construction involving extensive use of precast planks, canopy beams, column & facade. The recent prefabrication trend, which is being increasingly used in the building industry, alleviating some of the environmental burdens associated with conventional construction. Several case studies were conducted on residential buildings in Singapore. The findings revealed that environmental, economic and social benefits of using prefabrication were significant when compared to conventional construction methods. This implies that a wider use of prefabrication techniques could contribute to sustainable construction in a dense urban environment on the other hand using precast components have adverse effects on the structure. Today, as much as 82% of Singaporeans live in public housing delivered by the HDB.HDB plans and develops public housing towns that provide Singaporeans with quality homes and living environments.
In the construction industry, construction defects and failures can occur during the design and construction phases of a project, or after a structure is substantially complete. However, while a design professional is responsible to produce complete, accurate and well-coordinated design and construction documents that are substantially free of defects; and a contractor is required to adhere to the design and construction documents, nothing built is ever perfect nor does the law require a perfect design. Furthermore, all buildings have an expected lifespan and even the structures of the ancient world will erode into a mound of sand given enough time. The eventual failure of a structure is an expected result rather than a manifestation of a construction defect. The question becomes what is a construction defect; how do defects arise; and how can defects be identified and managed?
A Case Study has been conducted to analyse Construction Defects on site, Remedial Measures & Preventable Practices at HDB Water Way Banks at Punggol East.
1.2. Objectives:
The objective of this case study aims to mitigate the defects to the future HDB projects. This project may help to HDB engineers for awareness regarding defects prevention practice. HDB has objectives, which expanding from time to time, Recently, HDB is not only functioning as a provider of basic shelter but also creates housing that can comply with the needs, necessities and aspirations for modern living days and futures. HDB objective is to provide affordable quality homes and develop vibrant living environment.
This case study has the following objectives of:
To investigate and identify the defects that appeared in the precast slab planks.
To identify the defects during construction progress, remedial measures & preventable practices propose better & quality living standards to the public.
Retrofitting of RCC structural members is necessary to prevent further distress in concrete. Retrofitting of RCC members should start with investigation and diagnosis of cracks and then by applying suitable retrofitting measures.
Structural Analysis for Rehabilitation of Reinforced Concrete StructureIJERA Editor
The structural element – basement raft of the Beach resort started showing symptoms of distressed within10
years on its completion. This deterioration has aggravated further during next 3-4 years and the basement floor
became obsolete functionally. Therefore, it was decided to identify the cause of failure of the structural element
in terms of inadequacy of the structural element. The failure may be due to inadequacies in the design and
detailing or defects during construction. This study dealt with the analysis of existing structural member for its
design adequacy and to ascertain defects during construction. Design adequacy was ascertained using computer
aided software- (STADD -Pro). Defects during construction have been ascertained by establishing the Sectional
details of the As built basement raft in terms of dimensional parameters, noted on site as well as quality
parameters confirmed in laboratory testing. On analysing these cases, the actual cause of the structural failure of
the basement raft has been concluded.
This topic discusses in general about the repair, maintenance and their strategies to be followed. It is also discussed about the assessment procedures and investigations to be done while repairing any structures.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
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Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
1. Contents
Definition of Distress
Causes of Distress
Constructional errors
Design Deficiencies
Deterioration of concrete
Need for repairs in structure
Concrete repair system
Durable concrete repair
2. DISTRESS
• Distress means damage.
• Because of the varying conditions under which it is produced at various
locations, the quality of concrete suffers occasionally either during
production or during service conditions resulting in distress.
2
3. Causes of distress of concrete
1. Structural causes
- Externally applied loads
- Environmental loads
- Accidents
- Subsidence etc.
2. Errors in design and detailing
3. Poor construction practice
4. Construction overloads
5. Drying shrinkage
6. Thermal stress
7. Weathering
8. Corrosion
3
4. • In addition to distress in hardened concrete, the plastic concrete may suffer
damage due to,
- Plastic shrinkage
- settlement cracking
- early removal of formwork
- improper design of formwork
4
5. Construction Errors
1. Use of inferior quality of construction materials.
2. Use of waste water or saline water in construction.
3. Adding of more water to improve workability which increase the w/c
ratio.
4. Poor grading of concrete ingredients.
5. Poor mixing of concrete.
6. Batching of concrete by volume using mortar pans.
7. Insufficient compaction of concrete.
8. Dropping concrete from the height results into segregation.
9. Insufficient reinforcement into slab, beam, column etc.
10. Improper location of reinforcing steel.
5
6. 11. Hooks , bends , overlaps are not properly provided.
12. Formwork props are not resting on a hard surface.
13. Early removal of formwork props.
14. Using props of insufficient strength.
15. Joints are not properly provided.
16. Improper curing of concrete.
17. Segregation of concrete during transportation.
18. Settlement of foundation
6
7. Design deficiencies
• Inadequate structural design :
1. Error in load calculations.
2. SBC is assumed without carrying out any field test.
3. Design not confirming to IS - 456 : 2000 and IS – 1893 : 1987 guidelines.
4. Design with many cantilevers.
5. Shear wall is not designed in multi storey building.
6. Stiffness in both direction is unequal resulting into torsion.
7. Effect of the short column in single storey.
8. Lack of knowledge of using structural design software like STAAD PRO,
ETABS etc.
7
8. • Poor design detailing :
1. Abrupt change in section.
2. Insufficient reinforcement at re – entrant corners and openings.
3. Inadequate provision for deflection.
4. Inadequate expansion joints.
5. Inadequate provision of drainage.
6. Material incompatibility.
7. Bent up bars are not properly shown.
8. Spacing of vertical stirrups is wrongly shown.
9. Column spacing of lateral ties is wrongly shown.
10. Ductile detailing is not as per IS – 13920.
8
9. DETERIORATION in concrete
• Causes of deterioration in concrete :
1. Accidental loading
2. Chemical reactions
- Acid attack
- Alkali carbonate rock reaction
- Alkali silica reaction
- Aggressive water attack
- Sulphate attack
3. Construction errors
4. Corrosion of metals
5. Design errors
- Inadequate structural design
- Poor design details
9
11. Need for Repairs of structures
a) Workmanship:
• Repair personnel are responsible for making repairs that are durable and
well bonded to existing structure.
• Workmen should be fully instructed regarding repair procedures and
critical aspects.
• Constant vigilance should be exercised by contractor’s and government
forces to ensure maintenance of necessary standards of workmanship.
11
12. b) Procedures:
• Use procedures that have been successful or that have a proven high
reliability factor.
• Repairs on new work will develop best bond and likely to be durable and
permanent as original work.
• The method and materials proposed for use should be approved by an
authorized inspector.
12
13. c) Materials:
• They must be of high quality, relatively fresh and capable of meeting
specifications requirements for particular application or intended use.
• Mill reports or testing laboratory reports is required.
• New, unproven materials should be used only when,
- Standard repair materials are unsuitable
- The owners and parties should be informed about risks associated
with it.
13
14. Evaluate structures
Project needs
Determine causes of damage & effect
Repair analysis
User needs
Determine repair strategies
Methods and materials
Repair and protect
Urgency Aesthetics Lifespan Environment
Contractibility &
Effectiveness
14
15. Durable concrete repair
1. Determine the causes of damage
2. Evaluate the extent of damage
3. Evaluate the need of repair
4. Select the repair method
5. Prepare the old concrete for repair
6. Apply the repair method
7. Cure the repair properly
15
16. 1. Determine the causes of damage :
If the cause of the original damage to concrete is not determined and
eliminated , or if an incorrect determination is made, whatever damaged
the original concrete will likely also damage the repaired concrete.
2. Evaluate the extent of damage :
The intent of this step is to determine how much concrete has been
damaged and how this damage will affect serviceability of this structure.
3. Evaluate the need to repair :
With early detection it may be possible to arrest the rate of
deterioration using maintenance procedure . Even if repairs is required,
early detection of damage will allow orderly budgeting of funds to pat the
cost of repair.
16
17. 4. Select the repair methods :
With insufficient information, it is very difficult to make proper ,
economical , and successful selections. This steps define the types of
conditions the repair must resist the available repair construction time
period and when repair must be accomplished.
5. Prepare the old concrete for repair :
Preparation of the old concrete for application of repair material is of
primary importance in the accomplishment of durable repairs.
6. Apply the repair material :
The selected repair material should be applied on the prepared surface
using equipment with proper care.
7. Cure the repair properly :
The repaired concrete should be cured for about 14 days.
17