for exemplification this adjuvant may be the high water reducing super plasticizer cimfluid 2002 available from axim new generation adjuvant based on modified polycarboxylate dosage of the order of 1 to 3 of the binder according to an advantageous version of the invention the composition includes additionally at least one adjuvant selected among the group comprising a set retardant an anti bubbling agent an air entrainer and the mixtures thereof in this view both following adjuvants should be mentioned in particular retardant retardant p from lafarge prestia dosage to be suited relative to the external temperature and to the setting time desired 0 corresponds to approximately 10 to 15 min and 1 of the order of 1 hour setting delay powder adjuvant cimparement an anti bubbling agent based on synthetic polymer and alcohol ether dosage of the order of 0 1 to 0 5 liquid adjuvant according to the result requested the proportion in weight of lime and that of plaster may range between 25 and 75 of the total weight of both these binders besides the quantity of mineral loads may range between 0 5 and 6 times the weight of both these binders on the other hand the proportion in weight of the adjuvants may range between 0 and 5 of the binders there are two examples of formulation of the composition according to the invention one of the advantages of the composition according to the invention lies in that it may be implemented in a relatively simple way with different types of material tests have been carried out with laboratory crushers industrial.