Statistical report shows that waste concrete accounts for 48.35% and waste brick accounts for 37.42% in construction waste. Only these two kinds of waste account for 85.77% of construction waste. Therefore, they have become a major method in resource replacement and a core part of recycled aggregate.
The crushing index of recycled aggregate basically meets the requirements of international standard for building pebbles and gravel, and its water absorption rate is also higher than that of natural aggregate. Although the apparent density and bulk density are reduced, the performance of recycled aggregate concrete can reach or even surpass that of ordinary concrete by adding appropriate additives.
Recycled aggregate is a kind of green material which can replace natural aggregate such as sand and stone by mixing waste concrete in a certain proportion after crushing, cleaning and grading. This method realizes the reprocessing of building waste and makes it become a new type of building material product. Green commercial concrete with recycled aggregate has won a win-win victory in sustainable development of building resources and environment.
