The Development And Application Studies Of Novel Chemical Sand Fixing Material

To pretend increasingly serious desertification, sand defense and fixation are exigent processes. Presently engineering sand fixation, biological (plant) sand fixation, and chemical sand fixation are common applications in the world. And the third procedure has received a large progress among them recently, which could be operated automatically with fast and simple manipulation and take effect rapidly. It is especially applicable in harsh environment and in which engineering sand and biological (plant) sand fixation can not easily be operated.Inexpensive and non-toxic sodium silicate sand as a material has been used for a long history, however, due to some characteristics of its own, such as the curing reaction is not complete, consolidated layer is not high enough, easy to be damaged by external forces, poor water resistance, reduced durability and so on, thus now a variety of domestic and foreign researchers are commented to the study of modified sodium silicate.In this thesis, we reported a new measure to modify sodium silicate chemically, after reasonably mixing polymer material, we obtained a good material,for sand fixation, which is cheap, and have strong adhesive ability and nice water resistance. By measuring the compressive strength, erosion rates and other indicators of the material, the preferred amount of sodium silicate, sorbitol, sodium tetraborate, lithium carbonate, polyacrylamide and carboxymethyl cellulose in this material was found, therefore we have received the synthesis condition and the formulations of the mixing material, finally.Through the practical application in the desert, it was further confirmed the excellent performance and a good prospect of this material.