(gÉrÄ­l`É) [Span.,=little war], fighting by groups of irregular troops (guerrillas) within areas occupied by the enemy. When guerrillas obey the laws of conventional warfare they are entitled, if captured, to be treated as ordinary prisoners of war; however, they are often executed by their captors.
The Inside Story â Concrete Is Porous. Most people do not realize that concrete is porous â more porous than Swiss cheese! The pores constitute 12 â 18% or more of the concrete but they are invisible, much smaller than the diameter of human hair. After new concrete is poured, almost half of the water has to evaporate.
Why Do I Need to Seal My Stamped Concrete Driveway? Concrete is porous, and anything that is spilled on it will soak in. Sealing your driveway will protect it from water, oils, vehicle fluids and solvents from seeping into and penetrating your new surface. These fluids will damage and undermine the integrity of your concrete as well as diminish the aesthetic value.