Using Recycled Concrete/Asphalt
Using Recycled Concrete/Asphalt
(OP)
Due to the increased push for contractors and others to use recycled products, we are seeing more and more people wanting to use recycled concrete and asphalt as construction materials. I have done some research and have seen in other localities that those materials are being used in base materials and concrete, but I am not seeing any technical literature on the matter. What I am seeing most is a client wanting to use recycled concrete for sub-base material under pavement or under a building slab. I think that initially it would perform satisfactorily, but I am concerned about long term performance especially under a pavement where conditions change and the effect of wheel loads. Appreciate any comments or the location/title of any literature that is available.
Thanks
Thanks





RE: Using Recycled Concrete/Asphalt
RE: Using Recycled Concrete/Asphalt
also see (most of these deal more with pavements):
http://www.cement.org/pavements/
http://www.arra.org/faqfulldepth.html
http://www.millergroup.ca/
https:
h
h
reclaimed ac and base course material make jam up new base course material when used in a soil cement/stabilization type of application. depending on the site specific conditions, a bona fide soil cement design could easily replace a portion of the base course aggregate. the cost savings to the owner would depend greatly on the onsite material properties, pavement design considerations/expectations, quantity/area of pavement, etc. as always, be careful with using reclaimed materials. make considerations for quantities, costs, performance, secondary effects, etc. for the secondary effects comment, i'm implying that you should be careful to not create additional problems by doing something like specifying too much cement (ie. "more is better" mentality) and removing all the base course material which may cause cracking to show up in the asphalt surface.
RE: Using Recycled Concrete/Asphalt
RE: Using Recycled Concrete/Asphalt
RE: Using Recycled Concrete/Asphalt
RE: Using Recycled Concrete/Asphalt
In addition to this, if you go to the WRAP website at www.wrap.org.uk, then there are numerous case studies, and information on this. Also the BRE [Building Research Establishment] and TRL [Transport Research Laboratory] have a number of published documents, some going back several years on the use of recycled materials, including road plannings [asphalt] recycled concrete aggregate [RCA] and many other materials.