Estimation des propriétés mécaniques à long terme des sédiments de Dunkerque traités à la chaux ou au ciment

Abstract

Estimation of long-term mechanical properties of Dunkerque sediments treated with lime or cement AbstractThe present work in this paper aims to make up the lack of information concerning the evolution of long-term mechanical properties of sediments treated with lime and/or cement. The unconfined compression tests and indirect tensile tests are performed to determine the compressive strength and tensile strength of sediments at different curing times and in particular at 360 days. The tensile strength and elastic modulus measured at 360 days allows evaluating the potential use of designed materials in base course layer. The strength ratios Rtd/Rt360d and modulus ratios Etd/Et360d are experimentally calculated and then compared to those recommended by French standard NF P 98-113 (1994) and NF P 98 114-3 (2001) for standard materials. With the exception of SD6L, the obtained values are slightly below the proposed values for estimating the tensile strengths of materials at 360 days but always above the proposed values for estimating elastic modules at 360 days.