concrete recycling
concrete recycling
(OP)
I have happened upon a large quantity of old concrete from demolition. does anyone have uses other than fill. Most of the concrete is about 40N if it matters!
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RE: concrete recycling
RE: concrete recycling
RE: concrete recycling
RE: concrete recycling
RE: concrete recycling
Jeff Foster, PE
CE Group, Inc.
Apex, NC
RE: concrete recycling
there have been actually some experiences on using old concrete from demolition as recycled aggregate for new concrete. I know this has been carried out in the Netherlands, Spain and Japan. The percentage of substitution of normal aggregate by recycled one is limited because of alterations in resistence, shrinkage, porosity and other properties. But sure you can use it as aggregate in certain amount. You can contact the following groups:
Dr. Enric Vázquez, Dr. Marilda Barra
Construction Engineering Department (Construction Materials Section)
Universitat Politécnica de Catalunya (Barcelona, Spain)
http://www-ec.upc.es/dec-eng.htm
Dr. Kazuhizo Iida, Dr. Shigeyoshi Nagataki, Tatsuhiko Saeki
Department of Civil Engineering and Architecture
Niigata University (Japan)
(Dr. Iida is also at Technology Center of Taisei Corporation)
The Japanese group has also studied the possibility of recycling the fine demolition waste for cement manufacturing.
Some published references are:
Committee of the Japan Cement Association (1998) Effective reuse of the powder produced from demolished concrete. Cement & concrete, Nº 621, pp. 52 – 59.
Iida K., Saeki T., Nagataki S. (2001) An integrated concrete recycling system including cement. Concrete library of JSCE, Nº 38, pp. 95 – 103.
Karlsson M. (1998) Reactivity in mortar phase in recycled concrete aggregate. Use of recycled concrete aggregate, pp. 197 – 203.
Tomosawa F. (1995) Towards perfect recycling of concrete. Cement & concrete, Nº 578, pp. 1 – 8.
van Loo W. (1998) Closing the concrete loop – from reuse to recycling. Use of recycled concrete aggregate, pp. 83 – 97.
Vàzquez E. (2000) Recycling of aggregates in Spain. Proc. International Workshop on Recycled Concrete, pp. 27 – 41.
Winkler A., Müeller H.A. (1998) Recycling of fine processed building rubble materials. Use of recycled concrete aggregate, pp. 157 – 168.
Finally, I strongly reccomend you to search for some experiences in the Netherlands (maybe contacting prof. van Loo, from ENCI, a Netherlands company), because I think they have the widest knowledge about it and it may be preferable for you to contact with companies directly instead of universities. I'll ask prof. Vazquez at Univ. Politecnica if he can provide me any contact and I'll let you know.
Regards,
Violeta.
RE: concrete recycling
I've just talked to Dr. Enric Vazquez at Universitat Politécnica de Catalunya, and he said you can contact him directly at enric.vazquez@upc.es
He will tell you about the practical experiences in this field and the possible contacts.
Violeta.
RE: concrete recycling
RE: concrete recycling
RE: concrete recycling
KRS Services
www.krs-services.com
RE: concrete recycling
Apparently, at least in NJ, there is a good demand for recycled condrete. Hope this helps you.
RE: concrete recycling
Clifford H Laubstein
FL PE 58662
RE: concrete recycling
Damon Kozul, PE, CHMM
Dallas Contracting Co., Inc.
http://www.dallascontracting.com
(908) 668-0600
RE: concrete recycling
RE: concrete recycling
So, what does this all mean? The advice would be crush and grade the concrete to form an aggregate. Undertake normal approval testing on the aggregate as if it was a prime source, then carry out a series of trial mixes, using variations in addition of RCC to Prime source aggregate, as well as the normal WCR and cement contents.
RE: concrete recycling
just wanted to let you know we have a solution for alot of these high cost associated with Concrete and Asphalt recycling.
i find the figures for recycling in NJ staggering. More reason to check us out with our new machinery that was just introduced first of the Year.
The CRUSH-ALL - One of a kind machine.
www.rrequipment.com
RE: concrete recycling
Damon Kozul, PE, CHMM
Dallas Contracting Co., Inc.
http://www.dallascontracting.com
(908) 668-0600
RE: concrete recycling
THere are so many options. CHECK US OUT IF YOU HAVE A CHANCE! www.crush-all.com
thanks Guys
RE: concrete recycling
Try logging on to http://www.wrap.org.uk
This is a UK Government funded organisation which provides advice on, as well as documented evidence of succesful uses for recycled materials, and there is some very good stuff on this exact subject. Just ignore the local suppliers, they are a bit far from the US for local delivery!