Experimental Researches On The Modified Organo-silicone Waterproofing Agent

In this paper, the types, the action mechanism, the research and development of commonly used waterproofing agents both domestic and abroad were introduced. The film-forming waterproof mechanism of organo-silicone polymer in concrete and the occurring drawbacks were also discussed. In accordance with the problems in modified synthesizing technology of organo-silicone, a proper modified technology was proposed.Based on mono-factor method, the factors influencing on the stability of emulsion polymerization and the performances of product were discussed in detail, which include the types and the adding ratio of monomers, emulsion and micromole, the temperature, the time, the agitating speed and monomer adding order in the synthesizing process.According to relative criterion, the performances of modified organo-silicone waterproofing agent were tested. The testing contents include both the performances of adding in mortar and concrete and that of waterproofing coating on mortar.The results show that the stability of emulsion polymerization and the performances of product could be improved by adjusting technology parameters. At the 0.5% dosage, the penetration pressure of mortar is increased up to 267%, the penetration depth of concrete reduced to 55%, and the water absorption ratio of the mortar with modified organo-silicone coating decreased to 2.1%. The comprehensive performances of modified organo-silicone waterproofing agent are prior to that of organo-silicone.