Method for long range preservation treatment by liquid-air injection of infrastructure monuments and other porous and embedded steel structures

The method of preserving porous structures above or below ground, said porous structures including masonry, concrete, brick, stone, marble and wood, as well as those with steel reinforcement members embedded within, without damaging the surfaces of the structures, to prolong the structures' life by an approximate ten-fold increase over present methods against attack by acid rain, erosion, aging or decay, comprising the steps of:

• a) applying a liquid preservative material under pressure to an outer exposed surface of a porous structure at least once;
• and
• b) substantially simultaneously with each said at least one liquid application, directing a pulsating blast of compressed air onto said liquid material acting as a fluid hammer for random masonry construction, directing a continuous air blast for uniform masonry construction, at sufficient velocity and force, with both liquid and air pressure acting together, to penetrate the surface of said porous structure and to inject said liquid preservative in dispersed form deeply into said porous structure so as to coat and waterproof the walls of the interstitial passages existing between masonry particles in said porous structures with said dispersed fluid material and to prevent said dispersed liquid preservative from stagnating in and blocking said interstitial passages, the incoming rush of air atomizing and forcing said dispersed liquid preservative through said interstitial passages, thus, after treatment, maintaining the breathability of said porous structure by enabling the passage of water vapor and permitting further and continued migration of said liquid preservative for a time to provide even deeper protection against cracks and delamination of said porous structure from internal stresses and environmental and weathering exposure.