Efeito do tempo de cura na resistência e deformabilidade de um solo argiloso ligado com cimento

This work presents the laboratory results of a cement bound clayey soil, using a Portland cement, CEM IV/A 32,5 R, added in the proportions of 8 % and 12 % relative to the dry mass of soil. Unconfined compression tests were conducted on specimens compacted in a Proctor mould, under the optimum water content (owc), for different curing times up to 90 days. The results show that the use of cement allows an increase in the unconfined compression strength of 30 % up to 7 days of curing time and only an increase in 6 % from 7 to 90 days of curing time, for the two cement contents studied. Correlations between unconfined compression strength, Rc and the percentage of cement and the curing time are proposed, as well as for the secant Young’s modulus, E30. The models enable the long-term prediction of the behaviour of those mixtures, knowing the compaction and strength properties of the soil used.