Natural Soil Modified with Polymer for use in landfill systems

LUZ MARTI; MAURO CODEVILLA; TERESA PIQUE; DIEGO MANZANAL

Buenos Aires

Conferencia; XV Pan-American Conference on Soil Mechanics and Geotechnica Engineering; 2015

ISSMGE-SAIG

The purpose of this study is to examine the addition of an anionicpolyacrilamide polymer to natural clay and a clay-sand mixture for the possible use inlandfill systems. The polymer interacts both with fine soil (clay) and granular soil(sand) generating particles aggregation with a small amount of polymer addition. Thepolymer reduces the micro porosity and changes the water retention capacity of thesoil-polymer mixture. The swelling potential, swelling pressure and compressionstrength were measured. The results are presented in terms of the variation of the indexproperties, the effects of the polymer in the potential expansion of the soil samples, therelationship of suction-degree of saturation and unconfined compression strength. Thehydraulic and mechanical behaviour of clay-polymer and sand-clay-polymer mixturespresent significant changes due to polymer addition