Several testing methods of flame retardant materials including horizontal and vertical firing method,oxygen index method,NBS smoke box method,thermal analysis method and CONE calorimeter method are presented,and the emphasis is put on CONE calorimeter method and its application in research of flame retardant materials.

The application foreground of the nanometer technique in the flame retardant material area;

The methods and principles of microcapsules technology were reviewed; the flame-retardant mechanism of encapsulated flame-retardant agents was interpreted, and the progress status of encapsulated flame-retardant materials at home and abroad was summarized; lastly, the further development of the new material was prospected.

The long-chain ammonium polyphosphate(APP),a kind of fire retardant material,was synthesized by polymerization and heating treatment,and the structure was characterized by XRD,particle size and average polymerization degree.

A flame-retardant material of PP/fibre Mg(OH) 2/P was prepared based on polypropylene(PP), fibre Mg(OH) 2 ,red phosphorus(P) and other aid agents.

This letter presents an experimental research on t he flame spread on a horizontal combustible material surface while external r adiation added.

The results indicate that measures such as the selection of high quality raw materials and fuel, adoption of proper proportion and homogenization, addition of admixtures, enhancement of operation and proper control of the bleaching water and the storage period of clinker are regarded as effective measures for the improvement of white cement clinker.