Estabilização de solos lateríticos da região Nordeste com emulsão asfáltica catiônica.

Abstract

The present work deals with a laboratory study in nine selected soils, involving several physiographic zones of the states of Paraíba, Piauí and Maranhão, which have different characteristics in terms of relief, temperature, altitude and rainfall. The laboratory study consisted of compaction tests using materials with a maximum diameter of 4.8mm and 9.5mm, simple compressive strength, indirect attraction strength and confined compressive strength (triaxial), using emulsion contents varying. from 1 to 8% for different moisture contents covering the two branches of the compaction curve. Different H / D (height / diameter) specimens were tested to evaluate the influence of sample sizes on the simple compressive strength of the chosen soils. The specimens, molded with the compaction energy corresponding to the normal process for different emulsion and water contents, are subjected to an outdoor curing process for 7 days and, after this period, ruptured. The optimum moisture content and void content of the soil-emulsion system generally decrease a. proportion that emulsion is added to the system. The simple compressive strength, indirect tensile strength, shear strength, normal stress at rupture piano and specific apparent dry mass presented a maximum value for the emulsion content corresponding to 2% and a moisture content close to the optimum. Finally, a statistical correlation was found between the value of simple compressive strength and indirect tensile strength. This allows us to propose the indirect tensile test as an alternative to the simple compressive strength test. Other relationships of this nature are inserted in this work.