Study on the Gas Anti-permeability and Carbonation Resistance of Recycled Concrete

The gas anti-permeability and carbonation resistance of recycled concrete,which was prepared by using waste concrete as recycled coarse aggregate(RCA) and some cement and mineral additions as raw materials,were studied.The results indicate that there are some relativity between the gas anti-permeability and carbonation resistance,and both properties of recycled concrete are worse than those of normal concrete.The poor gas anti-permeability and carbonation resistance of recycled concrete can be offset by mineral additions.