1. The document discusses using recycled concrete aggregate from demolished structures to make pervious concrete. Various mix designs were tested with different ratios of cement to recycled aggregate.
2. Compressive strength and water permeability tests were performed on concrete cubes at various ages. The compressive strength was found to increase over time for all mix designs and showed similar behavior regardless of aggregate ratio.
3. The results indicate that recycled aggregate can be successfully used to make pervious concrete, helping reduce waste and make more sustainable concrete.
Porous concrete is a type of concrete that allows water to drain through it, reducing runoff. It is made like traditional concrete but without fine aggregates, leaving 20% void space. Underneath are layers of compacted gravel that store and infiltrate water. Installing porous concrete brings benefits like recharging groundwater, reducing floods and pollution spread. A test at the University of New Hampshire found over 99% reduction in various pollutants in runoff water from a porous concrete parking lot.
This document provides an overview of pervious concrete, including its environmental benefits, applications, performance characteristics, construction procedures, and testing methods. Key points include:
- Pervious concrete allows rainwater to seep through it, reducing runoff and recharging groundwater while meeting EPA stormwater regulations.
- It has sufficient strength for many pavement applications despite its high porosity (15-25% voids) and permeability rates of 480 in/hr or more.
- Applications include pavements for parking lots where it can eliminate the need for retention ponds and swales by capturing and filtering rainwater.
- Proper construction techniques like vibration and curing are important for performance. Visual inspections, infiltration tests
The document summarizes a study on using macro fiber reinforcement in pervious concrete. The study tested different fiber lengths and dosages to determine their effect on pervious concrete properties. It found that fibers increased unit weight and tensile strength but decreased permeability. Freeze-thaw durability improved for mixtures with 2.25-inch fibers. The optimum fiber dosage appeared to be 5 pounds per cubic yard of 2.25-inch fibers, as it reduced raveling, improved durability, and increased tensile strength the most.
Pervious concrete is a special type of concrete that allows water to pass through it, reducing runoff from sites. It consists of cement, coarse aggregates, and 15-35% voids. Pervious concrete requires careful construction to place and cure it properly given its high porosity. It has applications in driveways, sidewalks, and low-traffic roads due to advantages like reducing flooding and replenishing groundwater. Some disadvantages include needing maintenance and having lower compressive strength than regular concrete. Overall, pervious concrete can help address issues like water scarcity in urbanizing areas.
This document summarizes pervious concrete, which is a type of concrete with high porosity that allows water to pass through, reducing runoff. It consists of cement, coarse aggregate, and optionally sand, with enough cement to coat the aggregates while maintaining interconnected voids. This helps solve stormwater issues. Pervious concrete has properties like 15-20% void structure, density of 1600-2000 kg/m3, compressive strength of 3.5-28 MPa, and acts as a pavement material with environmental benefits like runoff reduction and groundwater recharging. Some applications include pavements, pool decks, sidewalks, and tennis courts.
1. The document discusses using recycled concrete aggregate from demolished structures to make pervious concrete. Various mix designs were tested with different ratios of cement to recycled aggregate.
2. Compressive strength and water permeability tests were performed on concrete cubes at various ages. The compressive strength was found to increase over time for all mix designs and showed similar behavior regardless of aggregate ratio.
3. The results indicate that recycled aggregate can be successfully used to make pervious concrete, helping reduce waste and make more sustainable concrete.
Porous concrete is a type of concrete that allows water to drain through it, reducing runoff. It is made like traditional concrete but without fine aggregates, leaving 20% void space. Underneath are layers of compacted gravel that store and infiltrate water. Installing porous concrete brings benefits like recharging groundwater, reducing floods and pollution spread. A test at the University of New Hampshire found over 99% reduction in various pollutants in runoff water from a porous concrete parking lot.
This document provides an overview of pervious concrete, including its environmental benefits, applications, performance characteristics, construction procedures, and testing methods. Key points include:
- Pervious concrete allows rainwater to seep through it, reducing runoff and recharging groundwater while meeting EPA stormwater regulations.
- It has sufficient strength for many pavement applications despite its high porosity (15-25% voids) and permeability rates of 480 in/hr or more.
- Applications include pavements for parking lots where it can eliminate the need for retention ponds and swales by capturing and filtering rainwater.
- Proper construction techniques like vibration and curing are important for performance. Visual inspections, infiltration tests
The document summarizes a study on using macro fiber reinforcement in pervious concrete. The study tested different fiber lengths and dosages to determine their effect on pervious concrete properties. It found that fibers increased unit weight and tensile strength but decreased permeability. Freeze-thaw durability improved for mixtures with 2.25-inch fibers. The optimum fiber dosage appeared to be 5 pounds per cubic yard of 2.25-inch fibers, as it reduced raveling, improved durability, and increased tensile strength the most.
Pervious concrete is a special type of concrete that allows water to pass through it, reducing runoff from sites. It consists of cement, coarse aggregates, and 15-35% voids. Pervious concrete requires careful construction to place and cure it properly given its high porosity. It has applications in driveways, sidewalks, and low-traffic roads due to advantages like reducing flooding and replenishing groundwater. Some disadvantages include needing maintenance and having lower compressive strength than regular concrete. Overall, pervious concrete can help address issues like water scarcity in urbanizing areas.
This document summarizes pervious concrete, which is a type of concrete with high porosity that allows water to pass through, reducing runoff. It consists of cement, coarse aggregate, and optionally sand, with enough cement to coat the aggregates while maintaining interconnected voids. This helps solve stormwater issues. Pervious concrete has properties like 15-20% void structure, density of 1600-2000 kg/m3, compressive strength of 3.5-28 MPa, and acts as a pavement material with environmental benefits like runoff reduction and groundwater recharging. Some applications include pavements, pool decks, sidewalks, and tennis courts.
CSF - Cerebrospinal fluid examination - from tapping to pathological diagnosisAshish Jawarkar
This is a series of notes on clinical pathology, useful for undergraduate and postgraduate students, as well as practising pathologists. Prepared from standard text books with data in tabular and easily readable format
Effect and Optimization of Silica Fume in Pervious ConcreteDale Fisher
The document summarizes research on the effect and optimization of silica fume in pervious concrete. Phase 1 found that 5% silica fume optimized workability by increasing yield stress and viscosity in a linear fashion. Phase 2 showed that 5% silica fume improved workability, tensile strength, and freeze-thaw durability when voids were allowed to vary. Phase 3 found that when voids were fixed at 20%, 3-5% silica fume provided the greatest improvement in compressive strength and bond between paste and aggregate.
Internal Curing of Pervious Concrete using Lightweight AggregateDale Fisher
The document discusses using prewetted lightweight aggregates for internal curing of pervious concrete. It finds that mixtures containing fine lightweight aggregate had better workability, similar moisture loss, higher strength, improved freeze-thaw durability, and less shrinkage compared to a control mixture without lightweight aggregate. The degree of hydration was also significantly increased, demonstrating that lightweight aggregates can effectively provide internal curing to pervious concrete.
No fine concrete. or pervious concreteDigant Patel
The document discusses no fines concrete, also called porous concrete or permeable concrete. It provides information on the student's name and department, then defines no fines concrete as a type of concrete with high porosity that allows water to pass through, reducing runoff. No fines concrete consists of cement, a single size of coarse aggregate, and water, without fine aggregates. It has a void content of 30-40% and strengths from 3.5-28 MPa depending on ratios and compaction. No fines concrete has benefits for water management, land development, and mitigating pollution while reducing heat islands. Regular cleaning is needed to maintain permeability.
Pervious concrete is a type of concrete with high porosity that allows water to pass through, reducing runoff. It was first used in Europe in the 1800s and became popular again in the 1920s for homes in Scotland and England. The mix design includes aggregates, cementitious materials, and water, with void contents between 15-30% and water-cement ratios of 0.28-0.40. Pervious concrete is used for flatwork applications and subgrade installations, and provides environmental, safety, and economic benefits like reduced runoff and maintenance costs, though it also has disadvantages like needing extended curing times.
This document provides information about a project on pervious concrete. It discusses the need for pervious concrete to address issues caused by impervious surfaces like parking lots and driveways. It then lists the members of the project and provides details on the objectives, which are to determine how material proportions affect the engineering properties of pervious concrete, including porosity and compressive strength. The document gives background on pervious concrete and discusses its properties in both fresh and hardened states. It also provides a schedule for the project and information on typical material proportions used in pervious concrete.
CSF - Cerebrospinal fluid examination - from tapping to pathological diagnosisAshish Jawarkar
This is a series of notes on clinical pathology, useful for undergraduate and postgraduate students, as well as practising pathologists. Prepared from standard text books with data in tabular and easily readable format
Effect and Optimization of Silica Fume in Pervious ConcreteDale Fisher
The document summarizes research on the effect and optimization of silica fume in pervious concrete. Phase 1 found that 5% silica fume optimized workability by increasing yield stress and viscosity in a linear fashion. Phase 2 showed that 5% silica fume improved workability, tensile strength, and freeze-thaw durability when voids were allowed to vary. Phase 3 found that when voids were fixed at 20%, 3-5% silica fume provided the greatest improvement in compressive strength and bond between paste and aggregate.
Internal Curing of Pervious Concrete using Lightweight AggregateDale Fisher
The document discusses using prewetted lightweight aggregates for internal curing of pervious concrete. It finds that mixtures containing fine lightweight aggregate had better workability, similar moisture loss, higher strength, improved freeze-thaw durability, and less shrinkage compared to a control mixture without lightweight aggregate. The degree of hydration was also significantly increased, demonstrating that lightweight aggregates can effectively provide internal curing to pervious concrete.
No fine concrete. or pervious concreteDigant Patel
The document discusses no fines concrete, also called porous concrete or permeable concrete. It provides information on the student's name and department, then defines no fines concrete as a type of concrete with high porosity that allows water to pass through, reducing runoff. No fines concrete consists of cement, a single size of coarse aggregate, and water, without fine aggregates. It has a void content of 30-40% and strengths from 3.5-28 MPa depending on ratios and compaction. No fines concrete has benefits for water management, land development, and mitigating pollution while reducing heat islands. Regular cleaning is needed to maintain permeability.
Pervious concrete is a type of concrete with high porosity that allows water to pass through, reducing runoff. It was first used in Europe in the 1800s and became popular again in the 1920s for homes in Scotland and England. The mix design includes aggregates, cementitious materials, and water, with void contents between 15-30% and water-cement ratios of 0.28-0.40. Pervious concrete is used for flatwork applications and subgrade installations, and provides environmental, safety, and economic benefits like reduced runoff and maintenance costs, though it also has disadvantages like needing extended curing times.
This document provides information about a project on pervious concrete. It discusses the need for pervious concrete to address issues caused by impervious surfaces like parking lots and driveways. It then lists the members of the project and provides details on the objectives, which are to determine how material proportions affect the engineering properties of pervious concrete, including porosity and compressive strength. The document gives background on pervious concrete and discusses its properties in both fresh and hardened states. It also provides a schedule for the project and information on typical material proportions used in pervious concrete.
Pervious Concrete Paving: The most effective Content for Your Patio: Pavers
1. Pervious Concrete Paving: The most effective Content for
Your Patio: Pavers
Brick Paver Installation Strategies
Best Alternative for Decorative or Stamped Concrete
Ornamental Concrete Routine maintenance
Household routine maintenance is part of almost every homeowner’s duties. Every spring,
you make repairs to get ready for the warmer months. One of the most important
maintenance tasks to complete on a regular basis is often times overlooked, i.e. caring for
your home's driveway, walkways, and patios.
Most homeowners believe that concrete can be hassle free and reliable enough for these
cases. Unfortunately, many homeowners learn the hard way that concrete does fail and
repairing or replacing it isn't cheap. In fact, the average homeowner will spend approximately
eight dollars a square foot when replacing existing concrete.
There are many problems that relate to basic concrete or stamped concrete issues, along
with problems when it comes to decorative concrete. Some of these problems can include
surface cracking, color inconsistencies, broken edges and several others too. You're able to
fix these situations upon investing far more than believed.
http://ephenryecocenter.com/homeowners/products/eco-paver.aspx
Another big disadvantage is the presence of bad repair patches you have to tolerate ‘Always’
There is no way to patch concrete without seeing that it has been patched.
You need to use paving stones for your driveways, walkways or patios in position of
decorative concrete. It is much better than fixing the concrete again and again. You will have
to spend less time, effort or money to replace cracked paving stones in comparison with
replacing large concrete slabs.
One of the best things of owning a home is the fact that you can accessorize your property
according to your preference. This is the greatest part because the design we have been
thinking for months will last but not least materialize. In such a facet, most women reach opt
for the design for the interior while men quite often get to make a decision what the exterior
would appear to be. One particular area outside of the house which men love to design is the
patio.
classic Green Driveway Materials
The patio can be described as typical out of doors space which is certainly utilized for dinning
outdoors or recreation. From this definition, it is very clear that this part of the house is
reserved for adult men considering the fact that they honestly like to prepare and also have a
2. great time outdoor.
In most cases, the emphasis lies for the flooring within the patio which is traditionally created
of concrete, stones or ceramic tiles. However, many developers are using a different material
like the paver since this is more convenient to use as a patio flooring. Pavers are pre-
fabricated piece of concrete or brick and many landscapers are at the moment suggesting
this as flooring for the patio.
find out
Pavers are now preferred by landscapers and home owners themselves because of the
clever geometry applied in these materials. Their unusual geometry serves an important
function and this is to join other pieces and locking them altogether. Most pavers are created
with rough surface area so that it accidents like as slipping shall be avoided. Furthermore,
home owners can save money should they pick pavers because there is no need to use
adhesives since the materials lock themselves together. Grains of sand is enough to hold the
pieces together. And because a paver is an individual piece put together, a crack on one
piece will not affect the other pieces. It is also easy to replace since they are relatively cheap.
Subsequently, paverÕs composition is very strong and durable. They also sip water instantly
and they do not necessarily expand due to moisture absorption. Finally, they can endure
even the harshest weather condition since pavers are built to last.