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LONG TERM PERFORMANCE AND DURABILITY OF EPS AS A LIGHTWEIGHT <br /> FILLING MATERIAL <br /> Tor Erik Frydenlund' and Roald Aabee' <br /> ABSTRACT <br /> Some 30 years of experience with Expanded Polystyrene(EPS)as a lightweight filling material in Norway has <br /> brought about both a wider use on a global scale and the introduction of a number of different design applications.In <br /> addition to reduced vertical loads,advantages from using EPS may also include reduced horizontal loads,simplified <br /> designs,foundations placed directly on EPS blocks and increased speed and ease of performing construction <br /> activities.This document describes practical experiences in Norway with long term performance and durability of <br /> EPS as a fill material based on observations and recorded data from monitoring programmes. <br /> I Chief Engineer,Soil Mechanics Division,Road Technology Department(NRRL),Directorate of Public Roads, <br /> Norwegian Public Roads Administration,Gaustadalleen 25,P.O.Box 8142 Dep,N-0033 Oslo <br /> 2 Senior Engineer,Soil Mechanics Division,Road Technology Department(NRRL),Directorate of Public Roads <br /> Norwegian Public Roads Administration,Gaustadalleen 25,P.O.Box 8142 Dep,N-0033 Oslo <br />