Method for removing stains from structural surfaces

摘要: A method for removing a stain from surface of structure which includes the steps spraying an aggregating agent comprising cationic linear organic polymer onto such having produced thereon, dissociating particles by use Coulomb force f generated between and agent, displacing slightly along to cause peeling thereof be cleaned, simultaneously, same cleaning. Another embodiment maintaining water permeability road easily eliminating adhering surfaces granular aggregate forming drainage-type pavement layer without various mechanical tools. Other embodiments include depositing soil improvement road, aggregated constituting settling in voids.