Pervious concrete is a type of concrete with little or no fine aggregate that has a high porosity which allows water to drain through it. It has a 15-25% void structure which makes it lightweight yet still able to support compressive strengths between 3-30 MPa. Its primary use is in pavements such as parking lots, driveways, and sidewalks where it helps reduce runoff compared to traditional pavements. Proper mix design and placement are important to maintain permeability while ensuring strength and durability.
Pervious Concrete is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge.
pervious concrete used in pavement presentation
presented by answer Muneer Ali
MSc in civil engineering - university of Baghdad
eng.anwer2012@gmail.com
009647710646107
special concrete and high performance concreteErankajKumar
GROUTING OF CONCRETE, advantage ofGrouting,Characteristics of Grouting, GUNTING OF
CONCRETE, Application of Guniting, Properties of Guniting, advantage and disadvantage of Guniting, UNDERWATER CONCRETING, Properties of underwater concrete, METHODS OF UNDERWATER CONCRETE, advantage and disadvantage of underwater concrete, HOT WEATHERING CONCRETE, precautions, COLD WEATHER CONCRETING, PUMPABLE CONCRETE, Requirements of Mix Design for Pumpable Concrete, Ready Mixed Concrete RMC, Types of Ready Mixed Concrete, advantage and disadvantage of ready mixed concrete, introduction in High performance concrete HPC, selection of materials, behaviour of fresh high performance concrete HPC , behaviour of Hardened High performance concrete HPC when to use High performance concrete HPC , application of HPC , Advantage of HPC , Limitations of HPC
Pervious Concrete is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge.
pervious concrete used in pavement presentation
presented by answer Muneer Ali
MSc in civil engineering - university of Baghdad
eng.anwer2012@gmail.com
009647710646107
special concrete and high performance concreteErankajKumar
GROUTING OF CONCRETE, advantage ofGrouting,Characteristics of Grouting, GUNTING OF
CONCRETE, Application of Guniting, Properties of Guniting, advantage and disadvantage of Guniting, UNDERWATER CONCRETING, Properties of underwater concrete, METHODS OF UNDERWATER CONCRETE, advantage and disadvantage of underwater concrete, HOT WEATHERING CONCRETE, precautions, COLD WEATHER CONCRETING, PUMPABLE CONCRETE, Requirements of Mix Design for Pumpable Concrete, Ready Mixed Concrete RMC, Types of Ready Mixed Concrete, advantage and disadvantage of ready mixed concrete, introduction in High performance concrete HPC, selection of materials, behaviour of fresh high performance concrete HPC , behaviour of Hardened High performance concrete HPC when to use High performance concrete HPC , application of HPC , Advantage of HPC , Limitations of HPC
Introduction
Types Of Fibers
Production Of SCFRC
Fresh Concrete Tests
Concrete Mixing And Casting Of Beams
Influence Of Concrete Type And Coarse Aggregate Characteristics On Shear
Influence Of Shear Span To Depth Ratio On Shear
Influence Of Beam Size On Shear
Advantages
Conclusions
References
These presentations were created during the 2016–2021 B.Arch programme.
Please refer to the references column at the end of each presentation for the information within.
Analysis the Effect of Steel Fibre and Marble Dust with Strength of Pavement ...ijtsrd
The thrust nowadays is to produce thinner and green pavement sections of better quality, which can carry the heavy loads. The high strength steel fibre reinforced concrete is a concrete having compressive strength greater than 40MPa, made of hydraulic cements and containing fine and coarse aggregates; and discontinuous, unconnected, randomly distributed steel fibres. The present study aims at, developing pavement quality concrete mixtures incorporating marble dust as partial replacement of cement as well as steel fibres. The aim is to the design of slab thickness of PQC pavement using the achieved flexural strength of the concrete mixtures. In this study, the flexural, compressive and split tensile strength for pavement quality concrete mixtures for different percentage of steel fibres and replacement of cement with marble dust are reported. It is found out the maximum increase in flexure strength, compressive strength and split tensile strength is for 0% Marble Dust and 1% Steel fibre. Also it has been possible to achieve savings in cement by replacing it with marble dust and adding fibres. This study also shows that in view of the high flexural strength, high values of compressive strength and high values of split tensile strength, higher load carrying capacity and higher life expectancy, the combination of 10 to 20% marble dust replacement along with addition of 0.5 to 1% steel fibres is ideal for design of Pavement Quality Concrete (PQC). Krishan Kumar | Sumesh Jain"Analysis the Effect of Steel Fibre and Marble Dust with Strength of Pavement Quality Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-1 | Issue-4 , June 2017, URL: http://www.ijtsrd.com/papers/ijtsrd152.pdf http://www.ijtsrd.com/engineering/civil-engineering/152/analysis-the-effect-of-steel-fibre-and-marble-dust-with-strength-of-pavement-quality-concrete/krishan-kumar
Fresh concrete is the immediate result of mixing all its components. From the moment in which the mixture is produced, chemical reactions take place that give it its final characteristics, such as its outstanding hardness. “These reactions can occur up to years after mixing.”
B-Tech Construction Material Presentaion.pptmosesnhidza
Concrete is a mixture of cement, aggregates and water, with any other admixtures which may be added to modify the placing and curing processes or the ultimate physical properties.
Highway Materials: Desirable Properties, Testing Procedures, Standards, and standard values relating to Soil, Stone Aggregates, Bitumen and Tar, fly- ash/pond-ash. Role of filler in Bituminous mix, materials of filler.
Specifications of DLC and PQC for rigid pavement
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Introduction
Types Of Fibers
Production Of SCFRC
Fresh Concrete Tests
Concrete Mixing And Casting Of Beams
Influence Of Concrete Type And Coarse Aggregate Characteristics On Shear
Influence Of Shear Span To Depth Ratio On Shear
Influence Of Beam Size On Shear
Advantages
Conclusions
References
These presentations were created during the 2016–2021 B.Arch programme.
Please refer to the references column at the end of each presentation for the information within.
Analysis the Effect of Steel Fibre and Marble Dust with Strength of Pavement ...ijtsrd
The thrust nowadays is to produce thinner and green pavement sections of better quality, which can carry the heavy loads. The high strength steel fibre reinforced concrete is a concrete having compressive strength greater than 40MPa, made of hydraulic cements and containing fine and coarse aggregates; and discontinuous, unconnected, randomly distributed steel fibres. The present study aims at, developing pavement quality concrete mixtures incorporating marble dust as partial replacement of cement as well as steel fibres. The aim is to the design of slab thickness of PQC pavement using the achieved flexural strength of the concrete mixtures. In this study, the flexural, compressive and split tensile strength for pavement quality concrete mixtures for different percentage of steel fibres and replacement of cement with marble dust are reported. It is found out the maximum increase in flexure strength, compressive strength and split tensile strength is for 0% Marble Dust and 1% Steel fibre. Also it has been possible to achieve savings in cement by replacing it with marble dust and adding fibres. This study also shows that in view of the high flexural strength, high values of compressive strength and high values of split tensile strength, higher load carrying capacity and higher life expectancy, the combination of 10 to 20% marble dust replacement along with addition of 0.5 to 1% steel fibres is ideal for design of Pavement Quality Concrete (PQC). Krishan Kumar | Sumesh Jain"Analysis the Effect of Steel Fibre and Marble Dust with Strength of Pavement Quality Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-1 | Issue-4 , June 2017, URL: http://www.ijtsrd.com/papers/ijtsrd152.pdf http://www.ijtsrd.com/engineering/civil-engineering/152/analysis-the-effect-of-steel-fibre-and-marble-dust-with-strength-of-pavement-quality-concrete/krishan-kumar
Fresh concrete is the immediate result of mixing all its components. From the moment in which the mixture is produced, chemical reactions take place that give it its final characteristics, such as its outstanding hardness. “These reactions can occur up to years after mixing.”
B-Tech Construction Material Presentaion.pptmosesnhidza
Concrete is a mixture of cement, aggregates and water, with any other admixtures which may be added to modify the placing and curing processes or the ultimate physical properties.
Highway Materials: Desirable Properties, Testing Procedures, Standards, and standard values relating to Soil, Stone Aggregates, Bitumen and Tar, fly- ash/pond-ash. Role of filler in Bituminous mix, materials of filler.
Specifications of DLC and PQC for rigid pavement
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
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.
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.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
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.
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.
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CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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.
2. Pervious Concrete
A mixture of coarse aggregate, Portland cement, water
and little or no sand.
Controlled amounts of water and cementitious materials
are used to create a paste that forms a thick coating
around aggregate particles without flowing off during
mixing and placing. Using just enough paste to coat the
particles maintains a system of interconnected voids.
The result is a very high permeability concrete that
drains quickly.
Typical pervious concrete pavement has a 15-25% void
structure. It is consequently lightweight, with a density
of 1600 to 1900 kg/m3.
3. Pervious Concrete Pavements
Primary use of pervious concrete is in pavements.
The compressive strength of pervious concrete is limited since
the void content is high. However, compressive strengths of 3 to
30 MPa are typical and sufficient for many applications.
Its low paste content and low fine aggregate content make the
mixture harsh, with a very low slump. This also leads to increased
traction for vehicles and prevents driving hazards like
hydroplaning.
Also referred to as porous concrete, permeable concrete, no-
fines concrete, gap-graded concrete, and enhanced-porosity
concrete.
By capturing storm water and allowing it to seep into the ground,
porous concrete is instrumental in recharging groundwater,
reducing storm water runoff, etc.
4. Asphalt Pervious Concrete
Comparison of
asphalt and pervious
concrete surfaces in
a case study from
USA.
Water stagnant on
asphalt surface while
pervious concrete
allows the water to
flow through.
5. Other applications that take
advantage of the high flow rate
through pervious concrete
include drainage media for
hydraulic structures, parking lots,
tennis courts, greenhouses, and
pervious base layers under
heavy-duty pavements.
Its high porosity aides it to be
used in buildings as a thermal
and sound insulator.
Summary of applications
Low-volume pavements
Residential roads, alleys and driveways
Sidewalks and pathways
Parking areas
Tennis courts
Sub-base for conventional concrete
pavements
Patios
Artificial reefs
Slope stabilization
Well linings
Tree grates in sidewalks
Foundations / floors for greenhouses,
fish hatcheries, aquatic centres, zoos
Hydraulic structures
Swimming pool decks
Pavement edge drains
Seawalls
Noise barriers
Walls (including load-bearing)
7. Fresh Properties
The plastic pervious concrete mixture is stiff compared to
traditional concrete. When placed and compacted, the
aggregates are tightly adhered to one another and exhibit
the characteristic open matrix.
For quality control and quality assurance, unit weight or
bulk density is the preferred measurement because some
fresh concrete properties, such as slump, are not
meaningful for pervious concrete.
Concrete working time is typically reduced for pervious
concrete mixtures. Usually, one hour between mixing and
placing is all that is recommended. This can be altered
using stabilizers & retarders.
8. Hardened Properties
Density
The density of pervious concrete depends on the properties and
proportions of the materials used, and on the compaction
procedures used in placement. In-place densities in the order of
1600 to 2000 kg/m³are common, which is in the upper range of
lightweight concretes.
Compressive Strength
Pervious concrete mixtures can develop compressive strengths in
the range of 3 MPa to 30 MPa, which is suitable for a wide range of
applications. Typical values are about 20 MPa.
Drilled cores are the best measure of in-place strengths, as
compaction differences make cast cylinders/cubes less
representative of field concrete.
9. Flexural Strength
Flexural strength in pervious concretes generally ranges between
about 1 and 4 MPa. Factors which influence the flexural strength
are the degree of compaction, porosity, and the aggregate-to-
cement (A/C) ratio.
Shrinkage
Drying shrinkage values in the order of 0.002 have been reported,
roughly half that of conventional concrete mixtures.
The material’s low paste and mortar content is a possible
explanation. Roughly 50% to 80% of shrinkage occurs in the first
10 days, compared to 20% to 30% in the same period for
conventional concrete. Because of this lower shrinkage and the
surface texture, many pervious concretes are made without
control joints and allowed to crack randomly.
10. Durability : Freeze-Thaw Resistance
Freeze-thaw resistance of pervious concrete in the field
appears to depend on the saturation level of the voids in the
concrete at the time of freezing.
In the field, it appears that the rapid draining characteristics
of pervious concrete prevent saturation from occurring.
Anecdotal evidence also suggests that snow-covered
pervious concrete clears quicker, possibly because its voids
allow the snow to thaw more quickly than it would on
conventional pavements.
When the large open voids are saturated, complete freezing
can cause severe damage in only a few cycles.
11. Sulfate Resistance
The open structure of pervious concrete makes it more
susceptible to acid and sulfate attack over a larger area
than in conventional concrete.
Abrasion Resistance
The open & rough structure of pervious concrete,
abrasion and ravelling of aggregate particles on the
surface can be a problem. Thus, highways are generally
not suitable for pervious concretes.
12. MIX DESIGN
& PLACEMENT
Samples with different Quantity of
water content – too little, medium &
too much water.
Grading
Pervious
Concrete
13. Material Proportions (kg/m3 )
Cementitious Materials 270 - 415
Narrowly graded aggregate (gravel/
crushed stone)
1190 - 1480
w/c ratio 0.25 – 0.34 ( with chemical admixtures)
0.34 - 0.40 ( without chemical
admixtures)
Cementitious materials/Aggregate ratio 1:0.21 – 0.25
Fine aggregate: Coarse aggregate ratio 0 to 1:1
Polypropylene fibres (optional when no
fine aggregate is present)
0.1% by volume or 0.9 kg/m3
Typical Mix Proportions for Pervious Concrete
Cement may be replaced by about 10-30% of fly ash, 20-50% of
blast furnace slag and 5% of silica fume
Addition of fine aggregate will decrease the porosity and
increase strength
14. Transportation
A pervious pavement mixture should be discharged completely within
one hour after initial mixing. Its very low slump may make discharge from
transit mixers slower than for conventional concrete; transit mixers with
large discharge openings or paving mixers tend to provide a faster
unloading time. The use of retarding chemical admixtures or hydration-
stabilizing admixtures may extend discharge times to 1½ hours or more.
Placement and Consolidation
Pervious concrete mixtures cannot be pumped, making site access an
important planning consideration. Prior to placement, the sub-base
preparation and forms should be double-checked.
Placement should be continuous, and spreading should be rapid.
Mechanical vibrating, laser screeds and manual screeds are commonly
used, although manual screeds can cause tears in the surface if the
mixture is too stiff.
Consolidation is generally accomplished by rolling over the concrete with
a steel roller, which compacts the concrete to the height of the forms.
Because of rapid hardening and high evaporation rates, delays in
consolidation can cause problems
15. Curing
As pervious concrete pavements do not bleed, they can have a
high propensity for plastic shrinkage cracking.
In fact, “curing” for pervious slabs and pavements begins before
the concrete is placed - the sub grade must be moistened to
prevent it from absorbing moisture from the concrete. After
placement, fog misting followed by plastic sheeting is the
recommended curing procedure, and sheeting should remain
in place for at least seven days.
Placement & strike-off using vibratory screed Plastic Sheeting for curing
Joints
16. Construction Inspection and Testing
Slump and cylinder/cube strengths are not meaningful.
Strength is a function of the degree of compaction, and
compaction of pervious concrete is difficult to reproduce in
specimens.
Instead, a unit weight test is usually done for quality
assurance, with acceptable values dependent on the mix
design, but generally between 1600 and 2000 kg/m³.
Post-Construction Inspection and Testing
After seven days, cores can be taken and measured for
thickness and unit weight as quality assurance and
acceptance tests. A typical testing rate is three cores for
every 75m³.
17. Maintenance
Maintenance of pervious concrete pavement consists
primarily of prevention of clogging of the void structure.
Cleaning options may include power blowing and
pressure washing. Pressure washing of a clogged
pervious concrete pavement has restored 80% to 90% of
the permeability in some cases.
Pervious concrete in freeze-thaw environments must not
become fully saturated. Saturation of installed pervious
concrete pavement can be prevented by placing the
concrete on a thick layer of 200 to 600 mm of open-
graded stone base.
18. REFERENCES
Construction Specifier Magazine, http://perviouspavement.org/PDFs/
A%20NCSU%20Structural%20Design%20-%20Permeable%20Pavements.pdf
• "NC State University Permeable Pavement Research and Changes to the State of NC
Runoff Credit System", From the 8th International Conference on Concrete Block Paving,
Nov’ 2006, http://perviouspavement.org/PDFs/ncsu_study.pdf
"Structural Design of Permeable Pavements Worksheet" North Carolina State ,
University Department of Biological and Agricultural Engineering
"Hydraulic Design for Permeable Pavement Worksheet" North Carolina State ,
University Department of Biological and Agricultural Engineering
“Infiltration Opportunities in Parking-Lot Designs Reduce Runoff and Pollution" By
Betty Rushton, Southwest Florida Water Management District. An analysis of the
treatment train used in the parking lot of the Florida Aquarium in Tampa. From the 7th
Biennial Stormwater Research and Watershed Management Conference in Florida.
"Mix Design Development for Pervious Concrete in Cold Weather Climates"
National Concrete Pavement Technology Center - Final Report, February 2006.
19. "Oil Retention and Microbial Ecology in Porous Pavement Structures" Coventry
University, School of Science and The Environment.
"Heavy Metal Retention Within a Porous Pavement Structure"
Department of Civil Engineering, Urban Water Management - University of Essen.
N. Subramanian, The Indian Concrete Journal, Vol. 82, Dec’2008.
E- BROCHURES :
Concrete in Practice (CIP): Pervious Concrete
"Concrete Parking Areas-- They're GREEN“
"When it Rains, It Drains" (4-page Pervious Concrete brochure)
Freeze-Thaw / Pervious Brochure (17 pages)
WEB SOURCES:
NRMCA's ConcreteAnswers.org
RMC Research And Education Foundation
www.perviouspavement.org
www.youtube.com – pervious concrete installation – 1 min 48 sec
Video.google.com – pervious concrete – 41 sec