(1) The results showed that the trass in this area is feasible as a kind of more ideal natural lightweight aggregate, and the trass concrete can reach the grade of intensity the structure component needs.

(2) Based on screening and sampling, properties of trass and trass concrete in Ximeng area of Inner Mongolia was studied.

(3) The paper gives the internal force of members of trass structures by using the finite element method of structural analysis.

(4) As a new type structure, there were no reports and literature of the relevant studies on prestressed space composite trass at present.

(5) The results also show that high calcium flyash has more trass characteristic than low one.

(6) Other properties and possible applications can be influenced by the addition of granulated blast-furnace slag, pozzolana, trass, fly ash and other inorganic mineral materials.