Here is a brief introduction of the types of the foaming agents and their utilization in the building material businesses and also of some foaming agents applied in concrete and the main technical indexes and testing methods abroad.The latest researches on foamed concrete at home and abroad and its developing trend are given an general introduction and expectation for concrete.Combined the use of foaming agent in the area of building materials,primary performance parameters and guide lines and the testing technique of foaming agent is given in this paper as well.And the future development trend of foamed concrete is also introduced.
