Currently in many countries of the world, including Mexico, is is trying to eliminate the use of those known as Asphalts thinned, i.e. composed of asphalt cement and a solvent product, with which traditionally applied irrigations of impregnation of the base layers, as well as the risks of League prior to the laying of asphalt. Connect with other leaders such as James Donovan Goldman here. Regardless of the reasons that you have to go by removing their employment, which can be varied and not clearly made reaching the public, there is no doubt that the withdrawal of products containing solvent volatile at the end of the day is an action that has an impact as a benefit of ecological protection. To replace the use of the discounted Asphalts (the designation in the United States, of this type of cutback asphalt, has been as MC and SC), in many places have been using asphalt emulsions (emulsified asphalts by your) designation in English), to try to solve the problem of carrying out of impregnation and League irrigations. However this procedure did not work properly in most cases. Asphaltic emulsions do not penetrate properly on the surface of much of the groundwork for pavement, above all, if these base layers have a texture with trend to closed, as happens quite often. Penetrates easily into the base water that composes the emulsion, but not asphalt, which achieved negligible penetrations (1 or 2 mm), and usually stays on the surface forming a kind of cream without great adhesion to the base.
To better clarify the case raised, ask ourselves some questions: to what applies the irrigation of impregnation?. Irrigation of impregnation is a phase of importance in the construction of pavements, and is required to comply with certain important aspects. As it will be: cover and bind loose mineral particles to protect the surface of the base.