Cracking and hollowing resistant aerated concrete water repellent and use method thereof

The invention relates to a cracking and hollowing resistant aerated concrete water repellent and a use method thereof. The water repellent is one of the following materials of: an organic silicone emulsion water repellent, a metal soap powder, a polyacrylate emulsion water repellent, a polyvinyl ester emulsion water repellent and a paraffin wax emulsion water repellent. The use method of the water repellent comprises a first doping method and later doping method. According to the invention, through adding the water repellent to an aerated concrete raw material, the water absorbing rate as well as wet swelling and drying shrinkage phenomenon of the aerated concrete can be reduced, common cracking and hollowing problems in the using process of the traditional aerated concrete are solved, large-scale popularization and application of the aerated concrete are promoted, and important technical benefits are obtained.