Neutralization of artificial sand concrete caused by acid rain

With the effect of carbonation and combining action of acid rain and carbonation,the carbonation depth of concrete with river sand and artificial sand was studied,respectively.The results show that with the effect of carbonation and combined action of acid rain and carbonation,the carbonation depth of concrete lowered with the increase of strength level,and the carbonation depth of artificial sand concrete is less than that of concrete with river sand of the same strength level.Compared with single car bonation,the neutralization of concrete was accelerated under the combined action of H+ and SO42-in acid rain.