Mod-01 Lec-10 Pores and porosity in concrete

Mod-01 Lec-10 Pores and porosity in concrete

Concrete Technology by Dr. Sudhir Misra,Department of Civil Engineering,IIT Kanpur.For more details on NPTEL visit http://nptel.ac.in

Permeable concrete

Permeable concrete

Watch video of Topmix permeable concrete. Topmix Permeable is a fast draining concrete pavement solution that rapidly directs stormwater off streets, parking surfaces, driveways and walkways. This minimises the cost and long-term maintenance for local authorities and developers of stormwater management.

Porosity and Permeability

Porosity and Permeability

This video briefly introduces the concept of groundwater before explaining how two properties - porosity and permeability - combine to determine the availability of groundwater and the ease with which it travels through rocks and sediment. We show simple bench-top demonstrations to illustrate each property and we calculate what a reasonable porosity value would be for common sediments such as sand and gravel. Finally, we discuss which rocks would best serve as sources of groundwater and which are likely to be barriers to groundwater flow. Visit our blog (https://geosciencevideos.wordpress.com) for a free quiz about the content in this video.

Porous concrete slab

Porous concrete slab

Tam lat tham nuoc, thu nghiem boi MTI 10/2011

Pervious Concrete

Pervious Concrete

Oklahoma Gardening's Kim Rebek talks with OSU Extension stormwater specialist Jason Vogel about the differences between pervious and traditional concrete and learns how to correctly mix pervious concrete.

New 'thirsty' concrete absorbs water

New 'thirsty' concrete absorbs water

Tarmac has created Topmix Permeable, a porous concrete that allows rain water to flow though it. Up to 880 gallons of water can trickle through Topmix, which could eliminate flooding where it has been installed. Produced by Rob Ludacer Read more: http://www.techinsider.io/ FACEBOOK: https://www.facebook.com/techinsider TWITTER: https://twitter.com/techinsider INSTAGRAM: https://instagram.com/tech_insider/ TUMBLR: http://techinsider.tumblr.com/

Steve Griggs Design | Porous Concrete

Steve Griggs Design | Porous Concrete

Call: 914.879.5602 Email: steve@stevegriggsdesign.com Website: http://www.stevegriggsdesign.com/ Houzz: http://www.houzz.com/pro/stevegriggsdesign Facebook: https://www.facebook.com/SteveGriggsDesign Instagram: https://www.instagram.com/steve.griggs/ LinkedIn: https://www.linkedin.com/nhome/ Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) 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 is made using large aggregates with little to no fine aggregates. The concrete paste then coats the aggregates and allows water to pass through the concrete slab. Pervious concrete is traditionally used in parking areas, areas with light traffic, residential streets, pedestrian walkways, and greenhouses. It is an important application for sustainable construction and is one of many low impact development techniques used by builders to protect water quality. Pervious concrete was first used in the 1800s in Europe as pavement surfacing and load bearing walls. Cost efficiency was the main motive due to a decreased amount of cement. It became popular again in the 1920s for two storey homes in Scotland and England. It became increasingly viable in Europe after WWII due to the scarcity of cement. It did not become as popular in the US until the 1970s. In India it became popular in 2000. What would it feel like if the first reaction when people see your house was WOW! A professional landscape can deliver that and more overtime and the man to bring it to you is Steve Griggs. Steve Griggs treats every client to a transparent step-by-step hands-on process from concept to design and implementation. When Steve Griggs promises, he delivers. As a member of the American Society of Landscape Architects combined with his years of formal training and experience, your landscape will be transformed from ordinary to extraordinary. What would it feel like if the first reaction when people see your house was WOW! A professional landscape can deliver that and more overtime and the man to bring it to you is Steve Griggs. Awarded the National Best of Houzz in Client Satisfaction in 2016, it is clear why Steve Griggs is the #1 Visual Artist in Landscape Design. With 30+ years of experience, dynamic energy in the true New Yorker spirit, Steve Griggs brings flexibility and innovation to his craft. With clients such as Dr. Oz, Palisades Center Mall in West Neck, Steve Griggs crafts and delivers a brilliant landscape plan offering top value to guarantee your backyard oasis at a fair price. Landscaping can increase a homes value 15-20 percent value and homeowners seereturns on that investment from 100-200 percent. watch your investment grow. Steve Griggs treats every client to a transparent step-by-step hands-on process from concept to design and implementation. When Steve Griggs promises, he delivers. As a member of the American Society of Landscape Architects combined with his years of formal training and experience, your landscape will be transformed from ordinary to extraordinary. This isn't landscape design, this is lifestyle design.

How to Stain Concrete- Porosity & Color is Critical

How to Stain Concrete- Porosity & Color is Critical

Understanding the importance of porosity and color of your concrete will help you avoid costly mistakes and wasted time when you apply a decorative concrete stain.

What is PERVIOUS CONCRETE? What does PERVIOUS CONCRETE mean? PERVIOUS CONCRETE meaning & explanation

What is PERVIOUS CONCRETE? What does PERVIOUS CONCRETE mean? PERVIOUS CONCRETE meaning & explanation

What is PERVIOUS CONCRETE? What does PERVIOUS CONCRETE mean? PERVIOUS CONCRETE meaning - PERVIOUS CONCRETE definition - PERVIOUS CONCRETE explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) 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 is made using large aggregates with little to no fine aggregates. The concrete paste then coats the aggregates and allows water to pass through the concrete slab. Pervious concrete is traditionally used in parking areas, areas with light traffic, residential streets, pedestrian walkways, and greenhouses. It is an important application for sustainable construction and is one of many low impact development techniques used by builders to protect water quality. The proper utilization of pervious concrete is a recognized Best Management Practice by the U.S. Environmental Protection Agency (EPA) for providing first flush pollution control and stormwater management. As regulations further limit stormwater runoff, it is becoming more expensive for property owners to develop real estate, due to the size and expense of the necessary drainage systems. Pervious concrete lowers the sites SCS Curve Number by retaining stormwater on site. This allows the planner/designer to achieve pre-development stormwater goals for pavement intense projects. Pervious concrete reduces the runoff from paved areas, which reduces the need for separate stormwater retention ponds and allows the use of smaller capacity storm sewers. This allows property owners to develop a larger area of available property at a lower cost. Pervious concrete also naturally filters storm water and can reduce pollutant loads entering into streams, ponds and rivers. Pervious concrete functions like a storm water infiltration basin and allows the storm water to infiltrate the soil over a large area, thus facilitating recharge of precious groundwater supplies locally. All of these benefits lead to more effective land use. Pervious concrete can also reduce the impact of development on trees. A pervious concrete pavement allows the transfer of both water and air to root systems allowing trees to flourish even in highly developed areas. Pervious concrete consists of cement, coarse aggregate and water with little to no fine aggregates. The addition of a small amount of sand will increase the strength. The mixture has a water-to-cement ratio of 0.28 to 0.40 with a void content of 15 to 25 percent. The correct quantity of water in the concrete is critical. A low water to cement ratio will increase the strength of the concrete, but too little water may cause surface failure. A proper water content gives the mixture a wet-metallic appearance. As this concrete is sensitive to water content, the mixture should be field checked. Entrained air may be measured by a Rapid Air system, where the concrete is stained black and sections are analyzed under a microscope.

Porosity Determination Using Liquid Saturating Method

Porosity Determination Using Liquid Saturating Method

Porosity Determination Using Liquid Saturating Method

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