Effect of the incorporation of small doses of emulsified asphalt in the performance of portland cement soil stabilizations

Abstract

Portland cement soil stabilizations are one of the most efficient and cost-effective ways to perform pavement structural layers, mainly when they are subjected to water aggressive environments. At the same time, and as any compromise solution, the weakness of the use of cement as a stabilizing agent resides in the shrinkage that implies an inevitable cracking of the resulting mixtures. The present work is about to analize the potential effect of the using of small doses of emulsified asphalt as a complement in the cement stabilization of sand-soil mixtures with the purpose of evaluate possible improvements in the strength behavior, even after water inmersion, and on the shrinkage level. To that end it is studied the bearing behavior of the mixtures from several tests as Unconfined compressive strength and indirect tensile strength, as the performance in terms of durability by wet-dry test and shrinkage behavior for wich is developed an specific test procedure.