Abstract: Foamed concrete is widely applied in various fields as a new type of inorganic heat preservation material.But the foamed concrete has higher bibulous rate , which seriously affect the durability performance of foamed concrete . According to the research of domestic and external , this paper introduced the application performance of waterproofing agent and water reducing agent on foamed concrete,and the insufficient in the current study were pointed out .The paper also proposed the research direction and development proposals to reduce water absorption .

Key words: foamed concrete;water absorption;waterproofing agent;water reducing agent