Education and Career Forum

hi ,
i want to know wat is recycled concrete and what are its uses.

recycled concrete is nothing but utilized 'rubbles'

USES:-1)Smaller pieces of concrete are used as gravel for new construction projects.
2)Crushed recycled concrete can also be used as the dry aggregate for brand new concretes if it is free of contaminants.
3)Larger pieces of crushed concrete, can be used for erosion controls etc.

recycled concrete is the use of concrete from demolished structures in place of aggregates in concrete.

recycled concrete with fly ash gives really good results,and can be used in roads construction

also tell me about its structural use

its not such an great material for structural use,its not stable, susceptible to corrosion an gives less compressive strength

please provide the mixed design for an recycled concrete

tell me about improvement of soil by fly ash

this technique is used in case of black cotton soils

the soil can be improved by using fly ash,lime and sodium carbonate in different proportions with the soil,the new soil is more compact and has greater dry density than ordinary soil...........

what about the permeability of the soil?does the permeability also gets affected after the treatment with fly ash?

yes the permeability gets decreased after the treatment of the soil with fly ash,the soil is more resistance to water seepage after the treatment......................

what are the uses of this technique and also the advantages of this technique in the economic sense ,is this technique cheaper to other techniques?

yes this technique saves lot of money in big projects by taking out the need of big foundations

from were can we get fly ash of good quality?
i mean which industry?

you can get good flyash from brick industry and also thermal power stations

what are the thermal stations located near bhimavaram area?

there is an thermal power plant located in vijaywada which is 100 km from bhimavaram

hi anud,
what is the name of the power plant you are talking about?

Originally Posted by satyavani

you can get good flyash from brick industry and also thermal power stations

fly ash is also available in the tandurs of different hotels and restaurants

the fly ash available from tandurs of different hotels are of not good quality,it is better to use the fly ash from thermal power plants

you can also us the fly ash coming from laundries they are of relatively of good qualities as compared to that of tandoors

concrete recycling is an increasingly common method of utilizing the rubble, Crushing at the actual construction site using portable crushers reduces construction costs and the pollution generated when compared with transporting material to and from a quarry....

Uses of recycled concrete
Smaller pieces of concrete are used as gravel for new construction projects. Sub-base gravel is laid down as the lowest layer in a road, with fresh concrete or asphalt poured over it. Crushed recycled concrete can also be used as the dry aggregate for brand new concrete if it is free of contaminants.

Larger pieces of crushed concrete, such as riprap, can be used for erosion control.

With proper quality control at the crushing facility, well graded and aesthetically pleasing materials can be provided as a substitute for landscaping stone or mulch.

The use of recycled concrete aggregate is typically restricted to commercial projects.Unprocessed concrete aggregate is likely to contain metal, glass and other contaminants; therefore, it is only safe to use in limited applications.

Originally Posted by rednam

you can also us the fly ash coming from laundries they are of relatively of good qualities as compared to that of tandoors

actually only the fine fly ash which comes out from the thermal power plant is the best for using in stabilization of soils,
other types of fly ash does not give the satisfactory results and fails,
i have done my project on it and i have observed the above mentioned problem

Originally Posted by maddusajj

what about the permeability of the soil?does the permeability also gets affected after the treatment with fly ash?

the permeability of the soils get really affected after the addition of additives like sodium carbonate,
if enough time is not given for it to react then there will be failure of the test but if enough time is given then there will be good results

dear friend

Recycled concrete helps in reducing the amount of material that is landfilled and reducing the need for virgin materials in new construction....

Originally Posted by satyavani

the permeability of the soils get really affected after the addition of additives like sodium carbonate,
if enough time is not given for it to react then there will be failure of the test but if enough time is given then there will be good results

i have recently found that,the fly ash which has only the very fine particle size is useful,not all the fly ash from the thermal power plant,
these fine fly ash are found only in the first stages of fly ash disposal from the the thermal power plants,

dear friends.

recycled concrete can also be used as the dry aggregate for brand new

concrete if it is free of contaminants.Recycled concrete helps in reducing the

amount of material that is landfilled and reducing the need for virgin materials

in new construction,

I manage a landfill and we just recently had all of our concrete crushed. I was under the assumption that I would be able to build road beds with the crushed material. I thought the finished product would be similiar to crush & run. The concrete was mixed with a lot of mud & dirt prior to crushing. Seems the finished product is not much good for anything. Any thoughts on what this material can be used for other than cover for the landfill? If so please e-mail me at [email protected]. Thanks

Originally Posted by Unregistered

I manage a landfill and we just recently had all of our concrete crushed. I was under the assumption that I would be able to build road beds with the crushed material. I thought the finished product would be similiar to crush & run. The concrete was mixed with a lot of mud & dirt prior to crushing. Seems the finished product is not much good for anything. Any thoughts on what this material can be used for other than cover for the landfill? If so please e-mail me at [email protected]. Thanks

hi...
recycling of concrete is very important to save our natural resources,actually mostly its not the cement in the concrete that's of great importance but the aggregates in it are of great use and importance
there are many application for the recycled concrete,
some of them are
1.noise barriers and embankments
2.bank protection
3.foundations for road construction
4.construction of road curbs

Frequently, people will accidentally put non recyclables in the recycling bin such as scrap wood, dirty cardboard/paper (Including pizza boxes), chip bags, etc.

For bagged waste, some recycling companies don’t even bother opening bags to check what is inside, they just throw them in the garbage nomatter what is inside. However, some recycling companies open up waste bags in the recycling to see what is inside, if it contains a lot of non-recyclables the whole bag is usually sent to garbage; or if it contains all or mostly recyclables, the contents will be moved to the next stage of sorting. The plastic bag is either thrown away or recycled.

But let’s say you threw a dirty pizza box in the recycling. If it passed sorting, it will mess up the recycling process and the vat full of paper may have to be discarded; wasting all the paper. But if it was detected in sorting, it will be automatically moved to garbage.

Heavy metals are not supposed to be thrown in municipal recycling; however if it ended up in the recycling, it will be moved to the correct recycling for scrap metals.

Avoid accidentally getting plastic bags or fabric in the recycling, as those materials may tangle the machinery; causing more maintenance required for the recycling machinery.